E-book แนะนำผลงานทางวิชาการ

Characteristics and catalytic properties
of Ni/Ti-Si composite oxide catalysts
via CO2 hydrogenation

ศ. ดร.บรรเจดิ จงสมจติ ร ภาควช� าว�ศวกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

In the present work, the effects of Ti addition on the characteristics and catalytic

properties of the different silica-based supported nickel (Ni) catalysts were investi-

gated. The different supports, such as the spherical silica particle (SSP), MCM41,

TiSSP, and TiMCM were synthesized and used to prepare the Ni catalysts having 20

wt% of Ni loading for CO2 hydrogenation under methanation. The different sup-
ports and catalysts were characterized by means of N2 physorption, XRD, SEM/EDX,

XPS, TPR, and CO chemisorption. The TiO2 was present in the anatase form after
catalyst calcination. The addition of Ti can play important roles on the characteris-

tics and catalytic properties of Ni catalysts by: (i) facilitating the reduction of Ni

oxides species strongly interacted with support, (ii) preventing the formation of

silicate compounds, and (iii) promoting the CO and CO2 dissociation resulting in
complete inhibition of the reverse water-gas shift (RWGS) reaction, especially at

high temperature. Based on CO2 hydrogenation, the NiTiMCM exhibited the high-
est activity and stability. © 2017, Chulalongkorn University. All rights reserved.

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ดเู พ่ิมเติมไดท่วี ารสาร
Engineering Journal
ตีพมิ พป 2017 เดอื นธันวาคม ฉบบั ท่ี 21 หนา 45-55
http://www.engj.org/index.php/ej/article/view/1565/668

หนว ยสอ่ื สารองคก ร [email protected]

Bacterial Cellulose Supported
Alumina Catalyst for Ethanol
Dehydration

ศ. ดร.บรรเจิด จงสมจิตร ภาคว�ชาวศ� วกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

An ultrafine three-dimensional nanofiber network structure of a very high porosity
endows bacterial cellulose (BC) to function as support for heterogeneous catalysis.
A novel catalyst of BC supported alumina (Al2O3) was developed by soaking purified
BC hydrogel in aluminum nitrate (Al(NO3)3) aqueous solution, dehydration (hot air drying
and freeze-drying) and calcination. The Al/BC catalysts reveal interior meso–macro porous
structures with average pore diameters in the range of 17–34 nm. The catalytic activities
were examined through an ethanol dehydration reaction in the gas phase at atmospheric
pressure in the range of 200–400 °C. The effects of acidic metal loading and dehydration
methods were investigated. Increasing Al loading from 12 to 50% resulted in a decreased
surface area but an increase in pore size. At the same Al loading, the catalysts with a
dehydration process by hot air drying presented higher Al concentrations on the outer
surface compared with those by freeze-drying. At high temperature of 400 °C, Al/BC
catalysts with 25 wt% Al loading and dehydrated by freeze drying (25Al/BC FD) and 50 wt%
Al loading, dehydrated by hot air drying (50Al/BC TD) exhibited the highest ethanol
conversions of 65.7–66.4% and ethylene yields of 43.26–44.24%, respectively, whereas at
low temperature of 200 °C, Al/BC catalysts with 25 wt% Al loading with either dehydration
method exhibited the highest diethyl ether yields of 40.02–41.60%.

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ดเู พม่ิ เตมิ ไดท ีว่ ารสาร
Catalysis Letters
ตีพมิ พป 2017 เดอื นพฤศจกิ ายน ฉบบั ที่ 147 หนา 2462-2472
https://link.springer.com/article/10.1007/s10562-017-2145-y

หนว ยสอ่ื สารองคก ร [email protected]

Diethyl ether production during
catalytic dehydration of ethanol
over Ru- and Pt- modified H-beta
zeolite catalysts

ศ. ดร.บรรเจดิ จงสมจติ ร ภาควช� าวศ� วกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

In the present study, the catalytic dehydration of ethanol over H-beta zeolite (HBZ) catalyst
with ruthenium (Ru-HBZ) and platinum (Pt-HBZ) modification was investigated. Upon the
reaction temperature between 200 and 400°C, it revealed that ethanol conversion and
ethylene selectivity increased with increasing temperature for both Ru and Pt modification.
At lower temperature (200 to 250°C), diethyl ether (DEE) was the major product. It was found
that Ru and Pt modification on HBZ catalyst can result in increased DEE yield at low reaction
temperature due to increased ethanol conversion without a significant change in DEE
selectivity. By comparing the DEE yield of all catalysts in this study, the Ru-HBZ catalyst
apparently exhibited the highest DEE yield (ca. 47%) at 250°C. However, at temperature from
350 to 400°C, the effect of Ru and Pt was less pronounced on ethylene yield. With various
characterization techniques, the effects of Ru and Pt modification on HBZ catalyst were
elucidated. It revealed that Ru and Pt were present in the highly dispersed forms and well
distributed in the catalyst granules. It appeared that the weak acid sites measured by NH3
temperature-programmed desorption technique also decreased with Ru and Pt promotion.
Thus, the increased DEE yields with the Ru and Pt modification can be attributed to the presence
of optimal weak acid sites leading to increased intrinsic activity of the catalysts. It can be
concluded that the modification of Ru and Pt on HBZ catalyst can improve the DEE yields
by ca. 10%.

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ดเู พ่มิ เติมไดท ี่วารสาร
Journal of Oleo Science
ตพี มิ พป 2017 ฉบบั ท่ี 66 หนา 199-207
https://www.jstage.jst.go.jp/article/jos/66/2/66_ess16108/_pdf

หนว ยสอ่ื สารองคก ร [email protected]

Differences in characteristics of Zr/SBA-15
and bimetallic Zr-La/SBA-15 prepared by
sol–gel and hydrothermal methods

ศ. ดร.บรรเจิด จงสมจิตร ภาคว�ชาวศ� วกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

In the present work, we report results of a comparative study of zirconium (Zr) and
bimetal (Zr and La) containing in SBA-15 silica, which was prepared by conventional
sol–gel and one-step hydrothermal methods. The structural and surface properties of all
samples were characterized by low and high-angle XRD, nitrogen physisorption, FTIR,
Raman, UV–Vis, SEM/EDX, TEM, and NH3-TPD techniques. The experimental results
demonstrated that the samples obtained from the sol–gel method retain the
two-dimensional hexagonal order structure of SBA-15. Compared to samples obtained
from the hydrothermal method, the pore system lacking long-range order was observed.
The incorporation of Zr and bimetal (Zr and La) had an effect on the textural properties of
both synthesized SBA-15 samples. This modified SBA-15 mesoporous samples still
exhibited high specific surface area, large pore volume and narrow pore size distribution.
Surface acidity in the SBA-15 silica suggests new active sites, especially Brønsted acid
type, indicating its future potential applications when acid sites are required.

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ดูเพ่มิ เติมไดท ่ีวารสาร
Journal of Porous Materials
ตีพมิ พป  2017 เดอื นตุลาคม ฉบับที่ 24 หนา 1383-1394
https://link.springer.com/article/10.1007/s10934-017-0380-7

หนว ยสอ่ื สารองคก ร [email protected]

Effect of Calcination Temperatures and

Mo Modification on Nanocrystalline

(γ-χ)-Al2O3 Catalysts for Catalytic
Ethanol Dehydration

ศ. ดร.บรรเจิด จงสมจติ ร ภาควช� าวศ� วกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

The mixed gamma and chi crystalline phase alumina (M-Al) catalysts prepared by
the solvothermal method were investigated for catalytic ethanol dehydration.
The effects of calcination temperatures and Mo modification were elucidated.
The catalysts were characterized by X-ray diffraction (XRD), N2 physisorption,
transmission electron microscopy (TEM), and NH3-temperature programmed
desorption (NH3-TPD). The catalytic activity was tested for ethylene production by
dehydration reaction of ethanol in gas phase at atmospheric pressure and temperature
between 200°C and 400°C. It was found that the calcination temperatures and Mo
modification have effects on acidity of the catalysts. The increase in calcination
temperature resulted in decreased acidity, while the Mo modification on the mixed
phase alumina catalyst yielded increased acidity, especially in medium to strong acids.
In this study, the catalytic activity of ethanol dehydration to ethylene apparently
depends on the medium to strong acid. The mixed phase alumina catalyst calcined at
600°C (M-Al-600) exhibits the complete ethanol conversion having ethylene yield of
98.8% (at 350°C) and the Mo-modified catalysts promoted dehydrogenation reaction
to acetaldehyde. This can be attributed to the enhancement of medium to strong acid
with metal sites of catalyst.

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ดเู พม่ิ เตมิ ไดท ่ีวารสาร
Journal of Nanomaterials
ตพี ิมพป  2017 ฉบับที่ 2017 หมายเลขบทความ 5018384
https://www.hindawi.com/journals/jnm/2017/5018384/

หนว ยสอ่ื สารองคก ร [email protected]

Effect of HCl loading and ethanol
concentration over HCl-activated
clay catalysts for ethanol dehydration
to ethylene

ศ. ดร.บรรเจิด จงสมจิตร ภาคว�ชาว�ศวกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

Montmorillonite clay (MMT) is one of materials that can be “green material” due to
its environmental safety. In this work, acid-activated MMT catalysts were prepared for
the dehydration reaction of ethanol. To be the green process, the reaction with
bioethanol was also studied. Ethanol concentrations in feed were varied in the range of
10-99.95 wt%. Moreover, the concentrations of hydrochloric acid activated MMT were
investigated in range of 0.05-4 M. From the experiment, it reveals that different acid
concentrations to activate MMT affect the catalytic activity of catalysts. The 0.3 M of HCl
activated MMT exhibits the highest activity (under the best condition of 30 ml
HCl aging for 1 h) with the Si/Al ratio of 7.4. It can reach the ethanol conversion and
ethylene selectivity up to 95% and 98% at reaction temperature of 400°C, respectively.
For the several ethanol feed concentrations, it does not remarkably affect in ethanol
conversion. However, it has some different effect on ethylene selectivity between lower
and higher reaction temperatures. It was found that at lower temperature reaction,
ethylene selectivity is high due to the behavior of water in feed. In addition,
the 0.3 M-MMT can be carried out under the hydrothermal effect.

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ดูเพมิ่ เติมไดท ่ีวารสาร
Journal of Oleo Science
ตพี มิ พป  2017 ฉบับท่ี 66 หนา 1355-1364
https://www.jstage.jst.go.jp/article/jos/66/12/66_ess17118/_article

หนว ยสอ่ื สารองคก ร [email protected]

Ethylene polymerization over TiSSP
composite-supported MAO with
bis[N-(3-tert-butylsalicylidene)
cycloheptylamine] titanium
dichloride complex

ศ. ดร.บรรเจดิ จงสมจติ ร ภาคว�ชาวศ� วกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

The following study focuses on the reduction of the required amounts of MAO after the
addition of Ti into the prepared spherical silica particle (SSP) to obtain TiSSP as a support of the
bis(phenoxy–imine) Ti-based catalyst used for ethylene polymerization. The ethylene
polymerization was carried out via the introduction of SSP and TiSSP-supported MAO with various
MAO contents, followed by adding the bis(phenoxy–imine) Ti-based catalyst. The characteristics
of SSP and Ti-modified SSP were determined by XRD, BET, FTIR, and NH3-TPD. There was evidence
of the presence of Ti–O–Si bond and the increase of acidity with the introduction of Ti into SSP.
Interestingly, the increased acidity on the surface of TiSSP composites was found to be the crucial
characteristic, which played an important role on the reduction of the required amounts of MAO.
It is suggested that the modification of SSP with Ti is able to decrease (by ca. 22%)
the consumption of the required amounts of MAO for polymerization. In other words, the lower
ratio of MAO to catalyst for TiSSP was observed for the identical value of activity obtained from SSP.
The produced polymers were thoroughly identified by DSC and SEM techniques.
All polyethylenes obtained using TiSSP exhibited higher crystallinity than those obtained from
SSP support. Finally, employing the TiSSP-supported bis(phenoxy–imine), Ti-based catalyst leads
to producing the polymer with lamellar structure that seemed to be corresponding to the
crystalline structure as was confirmed by DSC results.

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ดูเพม่ิ เติมไดทวี่ ารสาร
Iranian Polymer Journal
ตพี ิมพป  2017 เดอื นตุลาคม ฉบับท่ี 26 หนา 775-784
https://link.springer.com/article/10.1007/s13726-017-0563-8

หนว ยสอ่ื สารองคก ร [email protected]

Improvement of cobalt dispersion
on Co/SBA-15 and Co/SBA-16 catalysts
by ultrasound and vacuum treatments
during post-impregnation step

ศ. ดร.บรรเจิด จงสมจติ ร ภาคว�ชาวศ� วกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

The Co/SBA-15 and the Co/SBA-16 catalysts having 20 wt% of cobalt were prepared
by the conventional impregnation method. Then, the post-impregnation treatments
including vacuum and ultrasound treatments were applied. The synthesized catalysts
were characterized by means of N2 physisorption, small angle X-ray diffraction (SAXRD),
wide angle X-ray diffraction (XRD), scanning electron microscopy and energy dispersive
X-ray spectroscopy (SEM/EDX), transmission electron microscopy (TEM), and tempera-
ture-programmed reduction (TPR). The results show that the synthesized SBA-15 had
hexagonal structure and the synthesized SBA-16 had the cubic structure. The vacuum
and the ultrasound treatments after incipient wetness impregnation can apparently
enhance the dispersion of cobalt on the SBA-15 catalysts due to the decrease of the
metal crystallite size. However, only the vacuum treatment was suitable for the Co/S-
BA-16. After reduction, no cobalt-silicate compound was detected based on XRD meas-
urement. Both post-impregnation treatments can also decrease the metal-support
interaction resulting in increased activity for CO2 hydrogenation under methanation. ©
2017, Chulalongkorn University 1. All rights reserved.

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ดเู พิ่มเตมิ ไดท ่วี ารสาร
Engineering Journal
ตพี ิมพป  2017 เดอื นมกราคม ฉบบั ท่ี 21 หนา 17-28
http://www.engj.org/index.php/ej/article/view/1032/517

หนว ยสอ่ื สารองคก ร [email protected]

Investigation of alkoxysilanes
in the presence of hydrogen with
ziegler-natta catalysts in ethylene
polymerization

ศ. ดร.บรรเจดิ จงสมจิตร ภาควช� าวศ� วกรรมเคมี
0-2218-6874 [email protected]

ABSTRACT

Effect of hydrogen and alkoxysilanes as external donor were investigated using
two commercial Ziegler-Natta catalysts (TiCl4/MgCl2•nEtOH and TiCl4/phthalate
type/MgCl2) in ethylene polymerization. These catalysts were analyzed by EDX, FTIR
and XRD measurements. Furthermore, catalytic activity was tested. According to the
results, when alkoxysilane was introduced into the system, catalytic activity reduced.
Compared these two alkoxysilanes, cyclohexylmethyldimethoxysilane (CHMDMS) can
decrease activity more than dimethoxydimethylsilane (DMDMS) did. This was because
CHMDMS has more bulky hydrocarbon groups than DMDMS. This led to restrict the
direction of monomer insertion to active sites. In addition, when hydrogen was added
into the system, CHMDMS is more sensitive to hydrogen than DMDMS. However,
CHMDMS showed lower hydrogen response than DMDMS with increased hydrogen
concentration. This was owing to its hydrogen sensitivity. Among the two catalysts,
catalyst having internal donor can decrease sensitivity of catalyst activity in the
system with hydrogen. The obtained polymers were further characterized by DSC and
GPC. © 2017, Chulalongkorn University. All rights reserved.

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ดูเพ่ิมเตมิ ไดทว่ี ารสาร
Engineering Journal
ตีพิมพป 2017 เดือนธันวาคม ฉบับท่ี 21 หน 171-180
http://www.engj.org/index.php/ej/article/view/1695/674

หนว ยสอ่ื สารองคก ร [email protected]

EKF-NN based Hybrid Estimator
for Ethylene Polymerization Process

ศ.ดร.ไพศาล กิตติศุภกร ภาควช� าว�ศวกรรมเคมี
0-2218-6878 [email protected]

ABSTRACT

A neural network-based hybrid estimator is developed for a multivariable non-
linear ethylene polymerization process in this paper. Due to its highly nonlinear
behavior and interaction between state variables, applying of an extended
Kalman filter (EKF) for estimating a monomer concentration using measured bed
temperatures usually provides the error of state estimation. Therefore, the neural
network-based hybrid estimator is designed in a combined structure between
nonlinear-EKF and feedforward neural network (NN). The feedforward neural net-
work is used to predict the estimated error of monomer concentration for reduc-
ing the error of EKF estimation. The proposed hybrid estimator is tested in several
cases in simulation such as for various disturbances and in presence of noises. The
neural network-based hybrid estimator shows good performances in the estima-
tion under nominal and disturbance cases. However, in dealing with noises, the
hybrid estimator shows the superior robustness by providing the accurate esti-
mated concentration over a neural network estimator and the EKF. © 2017 Elsevi-
er B.V.

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ดูเพมิ่ เติมไดท ีว่ ารสาร
Computer Aided Chemical Engineering
ตีพิมพป  2017 เดือนตุลาคม ฉบับท่ี 40 หนา 1459-1464
https://www.sciencedirect.com/science/arti-
cle/pii/B9780444639653502452?via%3Dihub

หนว ยสอ่ื สารองคก ร [email protected]

Improving of crystal size distribution control
based on neural network-based hybrid model
for purified terephthalic acid batch crystallizer

ศ. ดร.ไพศาล กิตติศุภกร ภาควช� าว�ศวกรรมเคมี
0-2218-6878 [email protected]

ABSTRACT

A main difficult task in batch crystallization is to control the size distribution of
crystal products. Complexity and highly nonlinear dynamic behavior directly affect to
model-based control strategies which heavily depend on the rigorous knowledge of
crystallization. In this work, neural network-based model predictive control and
inverse neural network control strategies are proposed and integrated with an optimi-
zation based on neural network-based hybrid model to control temperatures of a
purified terephthalic acid batch crystallizer. A neural network-based hybrid model of
the batch crystallizer is developed to provide nonlinear dynamic responses used in
optimization algorithm for finding an optimal temperature profile related to the quali-
ty of a crystal product. Then, the obtained optimal profile is used as set points of the
proposed control strategies for improving the crystal product quality. The perfor-
mances and robustness of the proposed controllers are evaluated in several cases
such as for set point tracking and plant/model mismatches. Simulation results show
that the neural network-based model predictive control gives the best control perfor-
mance among the inverse neural network control and a conventional PID controller in
all cases. © 2017, Chulalongkorn University. All rights reserved.

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ดเู พิ่มเตมิ ไดท วี่ ารสาร
Engineering Journal
ตพี ิมพป  2017 เดอื นธันวาคม ฉบับท่ี 21 หนา 319-331
http://www.engj.org/index.php/ej/article/view/1659/681

หนว ยสอ่ื สารองคก ร [email protected]

Neural network based modeling and control
for a batch heating/cooling evaporative
crystallization process

ศ. ดร.ไพศาล กิตตศิ ุภกร ภาคว�ชาวศ� วกรรมเคมี
0-2218-6878 [email protected]

ABSTRACT

Crystallization processes have been widely used for separation in many fields to provide a
high purity product. In this work, dynamic optimization and neural network (NN) have been
applied to improve the quality of the product: citric acid. In the dynamic optimization, optimiza-
tion problems maximizing both crystal yield and crystal size have been formulated. The neural
networks have been developed to provide NN models to be used in the formulation of not only
neural network inverse control (NNDIC) but also neural network model predictive control
(NNMPC) strategies. The Levenberg Marquadt algorithm has been used to train the network and
optimal neural network architectures have been determined by a mean squared error (MSE) min-
imization technique. In addition, a neural network model has been designed to provide
estimates of the temperature and the concentration of the crystallizer. These estimates have
been incorporated into the NNMPC controller. In the NNDIC controller, another neural network
model has been applied to predict the set point of jacket temperature. The simulation results
have shown that the obtained crystal size is increased by 19% and 30% compared to that by cool-
ing and evaporation methods respectively and the obtained yield is increased more than 50%.
The robustness of the proposed controller is investigated with respect to parameters mismatch-
es. The results have shown that the NNMPC controller provides superior control performances in
all case studies. © 2017, Chulalongkorn University 1. All rights reserved.

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ดูเพ่มิ เติมไดทวี่ ารสาร
Engineering Journal
ตพี ิมพป  2017 เดอื นมกราคม ฉบบั ท่ี 21 หนา 127-144
http://www.engj.org/index.php/ej/article/view/1042/525

หนว ยสอ่ื สารองคก ร [email protected]

Simulation of steam gasification
in a fluidized bed reactor
with energy self-sufficient condition

ศ. ดร.ไพศาล กติ ตศิ ภุ กร ภาควช� าวศ� วกรรมเคมี
0-2218-6878 [email protected]

ABSTRACT

The biomass gasification process is widely accepted as a popular technology to
produce fuel for the application in gas turbines and Organic Rankine Cycle (ORC).
Chemical reactions of this process can be separated into three reaction zones:
pyrolysis,combustion, and reduction. In this study, sensitivity analysis with respect to
three input parameters (gasification temperature, equivalence ratio, and steam-to-
biomass ratio) has been carried out to achieve energy self-sufficient conditions in a steam
gasification process under the criteria that the carbon conversion efficiency must be
more than 70%, and carbon dioxide gas is lower than 20%. Simulation models of the
steam gasification process have been carried out by ASPEN Plus and validated with both
experimental data and simulation results from Nikoo & Mahinpey (2008). Gasification
temperature of 911 °C, equivalence ratio of 0.18, and a steam-to-biomass ratio of 1.78, are
considered as an optimal operation point to achieve energy self-sufficient condition. This
operating point gives the maximum of carbon conversion efficiency at 91.03%, and
carbon dioxide gas at 15.18 volumetric percentages. In this study, life cycle assessment
(LCA) is included to compare the environmental performance of conventional and energy
self-sufficient gasification for steam biomass gasification.

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ดเู พิ่มเติมไดทวี่ ารสาร
Energies
ตีพิมพป  2017 ฉบับท่ี 10 หมายเลขบทความ 314
http://www.mdpi.com/1996-1073/10/3/314

หนว ยสอ่ื สารองคก ร [email protected]

Dielectric and thermal behaviors of
fluorine-containing dianhydride-modified
polybenzoxazine: A molecular
design flexibility

ศ. ดร.ศราวธุ รม� ดุสติ ภาควช� าวศ� วกรรมเคมี
0-2218-6862 [email protected]

ABSTRACT

Fluorine‐containing copolybenzoxazines were successfully prepared by reacting
bisphenol‐AF/aniline‐based benzoxazine resin (BAF‐a) with
4,4’‐(hexafluoroisopropylidene) diphthalic anhydride (6FDA) in N,N‐dimethylacetamide
solvent. The dielectric and thermal properties as well as flexibility of the resulting
copolymer films were investigated. The incorporation of fluorine groups into
polybenzoxazine was found to substantially decrease the dielectric constant of the
resulting copolybenzoxazine to as low as 2.6. The formation of ester linkages between
the hydroxyl groups in the poly(BAF‐a) and the carbonyl groups in the 6FDA resulted in
substantially enhanced flexibility of the copolybenzoxazines. Moreover, the copolymers
showed superior degradation temperature and significant improvement in char yield,
up to 464 °C and 56%, respectively. The glass‐transition temperature of the
copolybenzoxazines was increased with increasing dianhydride content and exhibited a
maximum value of 290 °C at 2.5/1 mole ratio of poly(BAF‐a) to 6FDA. Therefore,
the fluorine‐containing dianhydride‐modified polybenzoxazines are appropriate for
applications as polymeric films for coatings and as a good electrical insulation material
with high thermal resistance.

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ดเู พม่ิ เติมไดท ีว่ ารสาร
Journal of Applied Polymer Science
ตพี ิมพป  2017 เดือนพฤศจิกายน ฉบับท่ี 134 หมายเลขบทความ 45204
https://onlinelibrary.wiley.com/doi/full/10.1002/app.45204

หนว ยสอ่ื สารองคก ร [email protected]

Effects of graphene and graphite on
properties of highly filled
polybenzoxazine bipolar plate for
proton exchange membrane fuel cell:
A comparative study

ศ. ดร.ศราวธุ รม� ดสุ ิต ภาควช� าวศ� วกรรมเคมี
0-2218-6862 [email protected]

ABSTRACT

Highly filled graphite and graphene polybenzoxazine (PBA) composites as bipolar
plate materials for polymer electrolyte membrane fuel cell (PEMFC) are developed in this
work. For graphite-filled PBA, the maximum graphite loading in the PBA composite was
observed to be as high as 80 wt% which is significantly higher than that of
graphene-filled PBA, i.e., 65 wt%. Mechanical properties, i.e., flexural modulus and
flexural strength of both types of composites at their maximum contents, were much
greater than the requirements of Department of Energy targets for bipolar plate
materials. Electrical conductivity of the highly filled PBA composites was 255 S/cm for
graphite composite and 357 S/cm for graphene composite. Furthermore,
the graphite-filled PBA composite provides a thermal conductivity value up to 10.2
W/mK. Interestingly, thermal conductivity value of the PBA composite having 75.5 wt%
of graphite in combination with 7.5 wt% of graphene loadings was found to be as high as
14.5 W/mK. The obtained properties of the graphite- and graphene-filled PBA
composites exhibit various characteristics suitable for PEMFC applications.

FULL PAPER (LINK)

CbดูเayพrPb่มิ roเoตnfิม.-ไrAดeklทaiีว่rtaาeรdSสuาMzรuatkeiriinalIsCiCnERecognition of Nobel Lectures
ตีพมิ พป 2017 เดอื นพฤศจิกายน หนา 211-259
https://link.springer.com/chapter/10.1007%2F978-3-319-61651-3_10

หนว ยสอ่ื สารองคก ร [email protected]

Effect of graphite particle size on
tribological and mechanical properties
of polybenzoxazine composites

ศ. ดร.ศราวุธ ร�มดุสติ ภาควช� าวศ� วกรรมเคมี
0-2218-6862 [email protected]

ABSTRACT

The effect of size of natural graphite (NG) particles on the tribological and mechanical
properties as well as thermal stability of polybenzoxazine composites with five different
sized NG particles (32, 38, 45, 53, and 75 μm) was studied. The tribological performance
of the composites performed in pin-on-disk tester was improved with adding larger NG
particle size. It was found that the wear resistance of the composites was improved by
increasing of the particle size. While, the increased NG particle size reduced the friction
coefficient of the composites from 0.36 to 0.31. In term of mechanical properties under
flexural test, i.e. flexural modulus and flexural strength, the NG particles with the largest
size possessed the suitable reinforcement ability. Glass transition temperature evaluated
by dynamic mechanical analysis and the degradation temperature at 5 % weight loss
measured by thermogravimetric analysis of the composites was in a temperature range
of 195 °C - 215 °C and 387 °C - 402 °C, respectively. Therefore, the obtained outstanding
properties, i.e. friction coefficient, flexural modulus and strength, glass transition
temperature, and degradation temperature make the polybenzoxazine composites
highly attractive to be utilized as friction materials.

FULL PAPER (LINK)

ดเู พม่ิ เติมไดทว่ี ารสาร
Chemical Engineering Transactions
ตพี ิมพป 2017 ฉบับท่ี 57 หนา 1351-1356
https://onlinelibrary.wiley.com/doi/full/10.1002/app.45204

หนว ยสอ่ื สารองคก ร [email protected]

Multiple-shape memory polymers
from benzoxazine-urethane
copolymers

ศ. ดร.ศราวธุ ร�มดสุ ติ ภาคว�ชาวศ� วกรรมเคมี
0-2218-6862 [email protected]

ABSTRACT

In this research, multiple-shape memory polymers were prepared from benzoxazine
(BA-a) resin and a urethane prepolymer (PU). The effects of BA-a resin content on the
thermal, mechanical and multiple-shape memory properties were investigated by
differential scanning calorimetry (DSC), thermogravimetric analysis, dynamic mechanical
analysis, a flexural test and a multiple-shape memory test. The results revealed that the
suitable curing conversions of BA-a:PU resin mixtures affect the shape memory behaviors.
The BA-a/PU copolymers demonstrated an increase in flexural strength and flexural
modulus at various deformation temperatures with an increase in the BA-a mass ratio
from 55%-80%, whereas the thermal properties of these binary systems, i.e. glass
transition temperature (Tg), degradation temperature (Td) and char yield, were also found
to increase with an increase in BA-a content. In addition, the two-step bending test was
carried out using a universal testing machine to evaluate the multiple-shape memory
properties. The results revealed that the BA-a/PU samples exhibited high values of shape
fixity (70%-96% for the first temporary shape and 83%-99% for the second temporary
shape) and shape recovery (88%-96% for the first temporary shape and 97%-99% for the
original shape).

FULL PAPER (LINK)

ดเู พิ่มเตมิ ไดท ีว่ ารสาร
Smart Materials and Structures
ตีพมิ พป  2017 เดือนพฤษภาคม ฉบบั ที่ 26 หมายเลขบทความ 065025
http://iopscience.iop.org/article/10.1088/1361-665X/aa6d47/meta

หนว ยสอ่ื สารองคก ร [email protected]

Organic Heat Stabilizers for Polyvinyl Chloride
(PVC): A Synergistic Behavior of Eugenol and
Uracil Derivative

ศ. ดร.ศราวธุ ร�มดุสิต ภาคว�ชาวศ� วกรรมเคมี
0-2218-6862 [email protected]

ABSTRACT

Recycling ability, mechanical, and thermal properties of PVC stabilized with organic
heat stabilizers, i.e., uracil (DAU) and eugenol were investigated to substitute PVCs
stabilized with commercial lead, Ca/Zn, and organic-based stabilizer for PVC pipe
production. PVC stabilized with the DAU and the eugenol can be processable at 30 °C
lower than that of the PVC stabilized with commercial heat stabilizers. The most
remarkable short-term thermal stability belonged to the PVC stabilized with the DAU,
and its original color can be maintained at least up to 3 processing cycles. Synergistic
behavior in thermal stability of the PVC mixed with DAU and eugenol at mass ratios of
1.5:1.5 was observed. Mechanical properties of DAU- and eugenol-stabilized PVC were
higher than the samples with other heat stabilizers. Glass transition temperature of the
PVC stabilized with all heat stabilizers was determined to be 99 °C with the exception of
the value of 89 °C for eugenol-stabilized PVC. Therefore, the DAU and the eugenol
showed high potential to be used as an organic heat stabilizer for PVC because of their
non-toxic and good heat resistance properties.

FULL PAPER (LINK)

ดูเพ่มิ เติมไดท่ีวารสาร
Journal of Materials Engineering and Performance
ตพี มิ พป 2017 เดอื นตุลาคม ฉบบั ที่ 26 หนา 4781-4788
https://link.springer.com/article/10.1007/s11665-017-2923-0

หนว ยสอ่ื สารองคก ร [email protected]

Alternative Hydrocarbon Biofuel
Production via Hydrotreating
under a Synthesis Gas Atmosphere

ศ. ดร.สทุ ธชิ ยั อสั สะบำรงุ รตั น ภาควช� าว�ศวกรรมเคมี
0-2218-6868 [email protected]

ABSTRACT

Direct use of syngas, a cheaper hydrogen-rich gas, instead of pure hydrogen, as
a deoxygenating agent for biohydrogenated diesel (BHD) production is presented
in this study. Low-cost palm fatty acid distillate (PFAD), an inedible byproduct from
refining palm oil, is used as a feedstock in the presence of a Pd/C catalyst. The
results indicate that syngas can be effectively used in BHD production, while the
achieved BHD yield is slightly lower than that obtained from pure hydrogen. The
liquid products contain mostly n-C15 and n-C17, which fall into a diesel range.
Decarbonylation is a prominent pathway under both hydrogen and syngas
atmospheres. It was found that CO in syngas can act as a reducing agent, which can
remove an oxygen atom from fatty acid molecules to form alkenol that could be
further reduced to alkene and then cyclized to cycloparaffins. After reactivation, the
activity of the catalyst could be fully recovered for at least 4 reused cycles. Reaction
pathways for the catalytic deoxygenation under syngas are also proposed with the
underlying mechanism on the role of CO.

FULL PAPER (LINK)

ดูเพ่มิ เตมิ ไดท ่วี ารสาร
Energy and Fuels
ตพี ิมพป 2017 เดอื นพฤศจกิ ายน ฉบบั ที่ 31 หนา 12256-12262

https://pubs.acs.org/doi/10.1021/acs.energyfuels.7b02207

หนว ยสอ่ื สารองคก ร [email protected]

Epoxidation of methyl oleate
in a TiO2 coated-wall capillary
microreactor

ศ. ดร.สทุ ธชิ ยั อสั สะบำรงุ รตั น ภาควช� าวศ� วกรรมเคมี
0-2218-6868 [email protected]

ABSTRACT

In the present work, a catalytic coated-wall microreactor was developed and
tested for producing epoxidized methyl oleate in a solvent-free system. TiO2 was
coated inside the microcapillary reactor wall by a static method, while H2O2 and
ethylenediaminetetraacetic acid (EDTA) were used as oxidant and stabilizer,
respectively. The weight percent of oxirane oxygen was determined according to
ASTM D1652 and the reaction performance was evaluated as oxirane oxygen yield
and selectivity. Without TiO2 coated catalyst or formic acid, trace oxirane yield were
obtained. Without EDTA as stabilizer, decomposition of H2O2 occurred as bubbles
formation causing system operation failure. The results indicated that TiO2 coated
catalyst as well as the presences of EDTA and formic acid were crucial for epoxidation
reaction, and oxirane yield of 43.1% could be achieved at the optimal reaction
temperature of 60 °C and residence time of 2.7 min. The results were compared with
the data obtained from a batch reactor. Microcapillary reactor offers continuous
operation with 23 times higher reaction rate of epoxide production than batch
reactor. However, TiO2 coated layer was partially peeled off over 3 h lead to decrease
in epoxide yield.

FULL PAPER (LINK)

ดูเพ่ิมเติมไดที่วารสาร
Chemical Engineering Journal
ตพี มิ พป 2017 เดือนเมษายน ฉบบั ท่ี 314 หนา 594-599

https://www.sciencedirect.com/science/article/pii/S1385894716317740

หนว ยสอ่ื สารองคก ร [email protected]

Process design of biodiesel
production: Hybridization of
ester-and transesterification
in a single reactive distillation

ศ. ดร.สทุ ธชิ ัย อัสสะบำรงุ รตั น ภาคว�ชาว�ศวกรรมเคมี

0-2218-6868 [email protected]

ABSTRACT

A novel hybridization of esterification and transesterification processes in a single reactive
distillation column was proposed for biodiesel production from waste cooking oil. Continuous
process operation was designed in a single reactive distillation column using two different types
of heterogeneous catalyst. Amberlyst-15 was loaded on the top of reactive section to eliminate
free fatty acid via esterification and CaO/Al2O3was loaded at the lower section for biodiesel synthesis
via transesterification. Suitable design parameters and operating conditions were determined by
process simulation using commercial Aspen Plus program. The hybridized process via reactive
distillation could reduce the number of equipment, methanol to oil in feed and energy consumption
compared to the conventional alkaline catalyzed process and the process of two reactive distillation
columns in series (packing with Amberlyst-15 and CaO/Al2O3). Net specific energy requirement
was achieved to the lower value as 216 kWhr/kmol biodiesel (or 197 kWhr/kmol biodiesel with
allocation to 98% purity of glycerol byproduct). This value is lower than that from the conventional
process and also the two reactive distillation columns in series of 665 and 224 kWhr/kmol biodiesel,
respectively. Moreover, increasing pressure in the hybridized column from 1 to 3 bar decreased
the number of reactive stage from 24 stages (4 esterification and 20 transesterification) to 8 stages
(3 esterification and 5 transesterification). Several feedstocks with different FFA content can be
operated in this hybridization ester- and transesterification column within the 8 reactive stages
with flexible of number of catalyst packing stage (acid and alkali catalysts) under column pressure
of 3 bar.

FULL PAPER (LINK)

ดูเพิ่มเติมไดทวี่ ารสาร
Energy Conversion and Management
ตีพิมพป 2017 เดอื นธนั วาคม ฉบับท่ี 153 หนา 493-503
https://www.sciencedirect.com/science/article/pii/S0196890417309159

หนว ยสอ่ื สารองคก ร [email protected]

Simulation of intensified process
of sorption enhanced chemical-looping
reforming of methane: Comparison
with conventional processes

ศ. ดร.สทุ ธชิ ยั อสั สะบำรงุ รตั น ภาควช� าวศ� วกรรมเคมี
0-2218-6868 [email protected]

ABSTRACT

Intensified process of sorption enhanced chemical-looping reforming
(SECLR) for hydrogen production was studied. This process was modified
by recycling a portion of solid NiO and CaO from air reactor (AR) to
reforming reactor (RR) and employing the exhaust CO2 as sweep gas at
the calcination reactor (CR) under energy self-sufficient operation. By
comparing the process performances among SECLR, conventional steam
reforming (SR) and sorption enhanced steam reforming (SESR) at their
optimum conditions, the intensified SECLR under adiabatic operation
showed the best performance with hydrogen productivity of 3.95 kmol/h,
CH4 conversion of 98% and H2 purity of 98.37%. Additionally, the
optimized SECLR process operated adiabatically required the solid ratio
from CR to AR of 0.945 and solid ratio from AR to RR of 0.008, leading to
the minimum of heat requirement. Furthermore, the influence of CO2
content in feed stream on adiabatic operation of the SECLR process was
investigated.

FULL PAPER (LINK)

ดูเพม่ิ เติมไดทวี่ ารสาร
Computers & Chemical Engineering
ตีพิมพป  2017 เดอื นตุลาคม ฉบบั ท่ี 105 หนา 237-24

https://www.sciencedirect.com/science/article/pii/S0098135417300959

หนว ยสอ่ื สารองคก ร [email protected]

Gelatin-bacterial cellulose
composite sponges thermally
cross-linked with glucose for
tissue engineering applications

ศ. ดร.เหมือนเดอื น พศ� าลพงศ ภาคว�ชาวศ� วกรรมเคมี
0-2218-6875 [email protected]

ABSTRACT

Freeze-drying and thermal cross-linking techniques were used to
prepare gelatin-bacterial cellulose (GB) composite sponges for
potential application as scaffolds in tissue engineering. To avoid the use
of toxic and costly cross-linking agents, glucose was used to cross-link
the gelatin via the Maillard reaction. The effects of the weight ratio of
gelatin to bacterial cellulose (BC) and the cross-linking conditions
(temperature and duration) on the GB sponges were examined.
An open and highly interconnected porous structure was attained for
the GB sponge with a gelatin:BC weight ratio of 25:75 that was
cross-linked at 140 °C for 3 h. Its high porosity, good swelling properties,
good structural stability in water, non-toxicity and good
biocompatibility against Vero cell are promising for its application as a
scaffold for tissue engineering.

FULL PAPER (LINK)

ดูเพ่มิ เตมิ ไดทวี่ ารสาร
Carbohydrate Polymers
ตพี ิมพป  2017 เดอื นธันวาคม ฉบับท่ี 177 หนา 361-368
https://www.sciencedirect.com/science/article/pii/S0144861717309700

หนว ยสอ่ื สารองคก ร [email protected]

Reinforcement of Natural Rubber with
Bacterial Cellulose via a Latex Aqueous
Microdispersion Process

ศ. ดร.เหมอื นเดอื น พ�ศาลพงศ ภาควช� าวศ� วกรรมเคมี
0-2218-6875 [email protected]

ABSTRACT

Natural rubber (NR) composites were reinforced with bacterial cellulose (BC)
to improve mechanical and physical properties. The natural rubber bacterial
cellulose (NRBC) composite films were prepared via a latex aqueous microdisper-
sion process by a thorough mixing of BC slurry with natural rubber latex (NRL).
The structural morphology and chemical and physical properties of NRBC com-
posites were investigated. The hydrophilicity, opacity, and crystallinity of the
NRBC composites were significantly enhanced because of the added BC. By load-
ing BC at 80 wt.%, the mechanical properties, such as Young's modulus and ten-
sile strength, were 4,128.4 MPa and 75.1 MPa, respectively, which were approxi-
mately 2,580 times and 94 times those of pure NR films, respectively, whereas the
elongation at break of was decreased to 0.04 of that of the NR film. Because of its
high mechanical strength and thermal stability, the NRBC composites have
potential uses as high mechanical strength rubber-based products and bioelastic
packaging in many applications.

FULL PAPER (LINK)

ดูเพิม่ เตมิ ไดทวี่ ารสาร
Journal of Nanomaterials
ตีพมิ พป  2017 ฉบับท่ี 2017 หมายเลขบทความ 4739793
https://www.hindawi.com/journals/jnm/2017/4739793/

หนว ยสอ่ื สารองคก ร [email protected]

Production of free lutein by simultaneous
extraction and de-esterification of marigold
flowers in liquefied dimethyl ether (DME)–
KOH–EtOH mixture

ศ. ดร.อาทวิ รรณ โชตพิ ฤกษ ภาควช� าวศ� วกรรมเคมี
0-2218-6868 [email protected]

ABSTRACT

Extraction of xanthophylls from marigold flowers using liquefied dimethyl ether
(DME) was investigated. The most suitable DME extraction condition was found to be
33:0.5 (w/w) DME to dried marigold flowers ratio and at 35 °C, giving 20.65 mg of total
xanthophylls/g of dried marigold flowers. Following extraction, the suitable de-esterification
conditions to convert the extracted lutein fatty acid ester (the major compound in
xanthophylls) to free lutein, a more bio-available form, were determined to be
2.5%w/v KOH–EtOH, at 35 °C for 4 h. While employing the most suitable conditions in
each of the two steps gave favorable free lutein yield (16.65 mg free lutein/g dried
marigold flowers), a one-step process in which simultaneous extraction and de-esterification
carried out at the most suitable condition: the DME to dried marigold flowers ratio
33:0.5 (w/w), EtOH to dried marigold flowers ratio 10:0.5, 5% KOH–EtOH concentration,
at 35 °C for 1 h, could lead to about 20% improvement (20.71 mg free lutein/g dried
marigold flowers). Furthermore, the results from this study suggested that wet marigold
samples could possibly be used both in the DME extraction for xanthophylls and in the
simultaneous process to obtain free lutein.

FULL PAPER (LINK)

ดเู พิ่มเติมไดท่ีวารสาร
Food and Bioproducts Processing
ตีพิมพป 2017 เดือนพฤศจกิ ายน ฉบับท่ี 106 หนา 193-200

https://www.sciencedirect.com/science/article/pii/S096030851730127X

หนว ยสอ่ื สารองคก ร [email protected]

Sequential organosolv fractionation/
hydrolysis of sugarcane bagasse:
The coupling use of heterogeneous
H3PO4-activated carbon as acid
promoter and hydrolysis catalyst

ศ. ดร.อาทวิ รรณ โชตพิ ฤกษ ภาควช� าวศ� วกรรมเคมี
0-2218-6868 [email protected]

ABSTRACT

Separation of lignocellulose constituents and hydrolysis of the polysaccharides
fraction to sugars are pre-requites in production of biofuels and chemicals. In this study,
a sequential organosolv fractionation of sugarcane bagasse and saccharification of the
cellulose-enriched pulp in hot compressed water using a coupled heterogenous acid
promoter/catalyst was studied. Among the liquid and solid acids tested, H3PO4-Activated
carbon showed a high performance on promoting selectivity and yield in fractionation
related to its high BET surface area and acid site density. Fractionation in a ternary
mixture of methyl isolbutylketone:methanol:water (16:68:16) at 180 °C for 60 min using
5%w/w H3PO4-Activated carbon resulted in 88.9% recovery of cellulose enriched in the
solid, together with 84.6% recovery of the hemicellulose as pentoses in the
aqueous-alcohol fraction and 76.0% lignin in the organic phase. With no separation of
the solid acid, the cellulose fraction could be further hydrolyzed under hot compressed
water conditions at 225 °C for 10 min, resulting in the maximal hexose yield of 58.3%
from the starting material. The catalyst retained >80% activity after reusing
in five consecutive batch cycles. The work demonstrates an efficient integrated
fractionation/hydrolysis process with coupling use of the acid promoter/catalyst, with
advantages on its high activity, selectivity and reusability.

FULL PAPER (LINK)

ดเู พิ่มเติมไดท วี่ ารสาร
Renewable Energy
ตีพิมพป 2017 เดือนธันวาคม ฉบับที่ 113 หนา 1141-1148

https://www.sciencedirect.com/science/article/pii/S0960148117305049

หนว ยสอ่ื สารองคก ร [email protected]

Amoxicillin removal from aqueous
solutions using hollow fibre
supported liquid membrane:
Kinetic study

ศ. ดร.อรุ า ปานเจรญ� ภาคว�ชาว�ศวกรรมเคมี
0-2218-6891 [email protected]

ABSTRACT

Amoxicillin was removed from aqueous solutions using hollow fibre
supported liquid membrane system (HFSLM). After evaluation of the
influencing variables, the highest permeation coefficient of amoxicillin reached
2.778 × 10−4 ms−1 when the length of hollow fibres was 15 cm and the operating
time was 60 min. Then, the reaction flux models of extraction and stripping were
calculated. Thereafter, the modelling results were compared with the
experimental data at standard deviations of 2.07 and 3.19%. In the comparison
of carrier and diluent, the best conditions were achieved when Aliquat 336 and
1-Decanol were used. Results showed that amoxicillin extraction and stripping
were of first and zero reaction orders; their reaction rate constants were 0.0344
min−1 and 0.0445 mg/L·min, respectively.

FULL PAPER (LINK)

ดเู พิม่ เตมิ ไดท ว่ี ารสาร
Chemical Papers
ตีพมิ พป 2017 เดอื นกรกฎาคม ฉบบั ที่ 71 หนา 1291-1302
https://link.springer.com/article/10.1007/s11696-016-0121-4

หนว ยสอ่ื สารองคก ร [email protected]

Effect of polarity and temperature on the
binary interaction between D2EHPA
extractant and organic solvents (kerosene,
n-heptane, chlorobenzene and 1-octanol):
Experimental and thermodynamics

ศ. ดร.อรุ า ปานเจร�ญ ภาควช� าวศ� วกรรมเคมี
0-2218-6891 [email protected]

ABSTRACT

The density and viscosity of binary mixtures of D2EHPA + organic solvent were
measured in the temperature range of 303.15–333.15 K and 0.1 MPa. The common
organic solvents, having different dielectric constants, namely kerosene (2.0),
n-heptane (1.92), chlorobenzene (5.62) and 1-octanol (10.3) were employed in this
work. The experimental density and viscosity data were validated employing
Nasrifar-Moshfeghian (NM) equation of state (EOS) and Vogel-Fulcher-Tammann
(VFT) equation: data correlations proved to be a good fit according to the RAD values
in the range of 0.01–2.00%. Further, the excess molar volume and viscosity deviation
were calculated in order to investigate the nature of the solute-solvent binary
mixtures. For all binary mixtures, the excess molar volume and viscosity deviations
have negative deviations from ideality over the temperature range. The strongest
interaction of D2EHPA extractant occurred in kerosene solvent affected by its large
hydrophobic molar volume. In addition, other thermodynamic properties of mixtures
such as apparent molar volume, thermal expansion coefficients, excess Gibbs energy,
enthalpy and entropy of activation of viscous flow were calculated.

FULL PAPER (LINK)

ดูเพมิ่ เติมไดท ่วี ารสาร
Fluid Phase Equilibria
ตพี ิมพป 2017 เดอื นกมุ ภาพนั ธ ฉบบั ท่ี 434 หนา 117-129
https://www.sciencedirect.com/science/article/pii/S0378381216305830

หนว ยสอ่ื สารองคก ร [email protected]

Measurement of the solubility of the salt
of 2-mercaptobenzothiazole with
cyclohexylamine and tert-butylamine
in various solvents at low temperatures:
Models and thermodynamic parameters

ศ. ดร.อุรา ปานเจร�ญ ภาควช� าว�ศวกรรมเคมี
0-2218-6891 [email protected]

ABSTRACT

The solubility data of the salt of 2-mercaptobenzothiazole with cyclohexylamine (2-MBT-CHA)
and tert-butylamine (2-MBT-TBA) in solid-liquid equilibrium, in various alternative solvents, are
indispensable for a preliminary industrial application aimed at producing sustainable and
renewable materials. In this paper, the solubility behavior of 2-MBT-CHA and 2-MBT-TBA, in various
solvents (1,4-dioxane, methyl isobutyl ketone (MIBK), toluene and water) at low temperatures
ranging from 303.15 to 348.15 K, has been studied. From the experimental data, it was found that
the solubility of 2-MBT-CHA and 2-MBT-TBA increased when temperature increased. In addition,
it was found that surface tension and polarity index were strongly dependent on the solubility of
2-MBT-CHA and 2-MBT-TBA. The solubility of 2-MBT-CHA and 2-MBT-TBA is in the following
sequence, MIBK,4-Dioxane, toluene and water. To conclude the experimental data,
thermodynamic models such as the polynomial empirical, the Van't Hoff, modified Apelblat,
the semi-empirical Buchowski–Ksiazczak, the Wilson and the UNIQUAC were investigated.
The Wilson model proved to be the most suitable for predicting the solubility behavior of
2-MBT-CHA and 2-MBT-TBA with temperature.Thermodynamic parameters were also investigated.
Hence, it was noted that the dissolution process of 2-MBT-CHA and 2-MBT-TBA in investigated
solvents is endothermic and spontaneous.The solubility of 2-MBT-CHA and 2-MBT-TBA obtained in
solvents in this experiment will provide essential support for 2-MBT-CHA and 2-MBT-TBA industrial
design and further theoretical studies.

FULL PAPER (LINK)

ดูเพม่ิ เตมิ ไดทวี่ ารสาร
Fluid Phase Equilibria
ตีพิมพป 2017 เดือนกมุ ภาพันธ ฉบบั ท่ี 434 หนา 141-151
https://www.sciencedirect.com/science/article/pii/S0378381216305982

หนว ยสอ่ื สารองคก ร [email protected]

Salt effect on the liquid-liquid
equilibrium of water-furfuryl
alcohol-furfural system at 298.15 K

ศ. ดร.อุรา ปานเจรญ� ภาคว�ชาวศ� วกรรมเคมี
0-2218-6891 [email protected]

ABSTRACT

Salt effect on the liquid phase equilibrium of the water-furfuryl
alcohol-furfural system at 298.15 K was studied. The effects of salt concentration
(1, 3 and 10% w/wNaCl) and type of salt (LiCl, KCl and RbCl) were investigated.
The solubility and tie-line data of these systems were determined by
experimental analysis. The results showed that addition of salt significantly
affected the two-phase region of ternary system; the enlargement of two-phase
region occurred with an increase of salt concentration in initial aqueous phase
and the type of the salt in the following order: LiCl>NaCl>KCl>RbCl. Distribution
coefficients and separation factors were also calculated. The reliability of the LLE
experimental results was validated by the Othmer-Tobias equation,
Hand equation and Bachman equation. NRTL was employed to correlate the
results obtained by the modeling with the experimental data. Good correlation
result was confirmed by the rmsd values of less than 0.3%.

FULL PAPER (LINK)

ดูเพิม่ เตมิ ไดที่วารสาร
Korean Journal of Chemical Engineering
ตพี ิมพป  2017 เดือนสงิ หาคม ฉบบั ท่ี 34 หนา 2293-2300
https://link.springer.com/article/10.1007/s11814-017-0136-8

หนว ยสอ่ื สารองคก ร [email protected]

Separation of platinum(IV) across
hollow fiber supported liquid
membrane using non-toxic diluents:
Mass transfer and thermodynamics

ศ. ดร.อรุ า ปานเจรญ� ภาควช� าว�ศวกรรมเคมี
0-2218-6891 [email protected]

ABSTRACT

Non-toxic diluents were studied and compared with toxic diluents for
separation of platinum(IV) across hollow fiber supported liquid membrane.
91.41% extraction and 81% stripping of platinum(IV) was observed for
sunflower oils at 328.15 K. Overall mass transfer resistance (R) was 146.612
× 104 s/cm. The separation process was exothermic (ΔHex 0 = −975.20
kJ/mol) and spontaneous (ΔGex 0 = −326.447 J/mol).The Ea of 1.673 kJ/mol
indicated that the diffusion of complex species across the liquid membrane
controlled the mass transfer step. Moreover, a modified Apelblat model
gave an excellent match for predicting the extraction behavior of
platinum(IV) at 1.2818% RMSD.

FULL PAPER (LINK)

ดเู พมิ่ เติมไดท ่วี ารสาร
Journal of Industrial and Engineering Chemistry
ตีพมิ พป  2017 เดอื นตุลาคม ฉบับที่ 54 หนา 278-289
https://www.sciencedirect.com/science/article/pii/S1226086X17302794

หนว ยสอ่ื สารองคก ร [email protected]

Amoxicillin removal from aqueous
solutions using hollow fibre
supported liquid membrane:
Kinetic study

รศ. ดร.สรุ เทพ เข�ยวหอม ภาควช� าวศ� วกรรมเคมี
0-2218-6893 [email protected]

ABSTRACT

Amoxicillin was removed from aqueous solutions using hollow fibre
supported liquid membrane system (HFSLM). After evaluation of the
influencing variables, the highest permeation coefficient of amoxicillin reached
2.778 × 10−4 ms−1 when the length of hollow fibres was 15 cm and the operating
time was 60 min. Then, the reaction flux models of extraction and stripping were
calculated. Thereafter, the modelling results were compared with the
experimental data at standard deviations of 2.07 and 3.19%. In the comparison
of carrier and diluent, the best conditions were achieved when Aliquat 336 and
1-Decanol were used. Results showed that amoxicillin extraction and stripping
were of first and zero reaction orders; their reaction rate constants were 0.0344
min−1 and 0.0445 mg/L·min, respectively.

FULL PAPER (LINK)

ดเู พิม่ เติมไดท่วี ารสาร
Chemical Papers
ตีพมิ พป 2017 เดอื นกรกฎาคม ฉบบั ที่ 71 หนา 1291-1302
https://link.springer.com/article/10.1007/s11696-016-0121-4

หนว ยสอ่ื สารองคก ร [email protected]

Control structure design and robust model
predictive control for controlling a proton
exchange membrane fuel cell

รศ. ดร.สุรเทพ เขย� วหอม ภาคว�ชาวศ� วกรรมเคมี
0-2218-6893 [email protected]

ABSTRACT

In this work, cell performance analysis, concept of control structure design, and controller
design for a proton exchange membrane fuel cell (PEMFC) were implemented. Steady-state
analysis was performed to determine suitable operating conditions. The effects of the
input parameters on cell voltage and cell temperature were analyzed to investigate the dynamic
behavior of a PEMFC that is important for control design. To obtain an efficient control system,
the control structure design of the PEMFC was also considered to find suitable controlled and
manipulated variables. Moreover, the selection of input-output pairings by considering the
relative gain array (RGA) as a controllability index was applied to the control system design.
Finally, model predictive control and offline robust model predictive control (MPC) based on a
linear time-varying model were proposed for PEMFC control. The results showed that the
steady-state operating points were selected at the current density = 0.51 A/cm2,
cell voltage = 0.59 V, power density = 0.30 W/cm2, and cell temperature = 332 K. The cell voltage
and cell temperature depend on the inlet molar flow rates, temperature of hydrogen and air, and
operating current density. According to the RGA, the inlet molar flow rates of air and hydrogen
are manipulated variables that regulate the cell temperature and partial pressure of hydrogen,
respectively. Furthermore, controller design using MPC and robust MPC as a controller can
demonstrate good results. Robust MPC can guarantee the stability of the PEMFC.

FULL PAPER (LINK)

ดเู พิ่มเติมไดท ี่วารสาร
Journal of Cleaner Production
ตพี ิมพป 2017 เดือนเมษายน ฉบบั ที่ 148 หนา 934-947
https://www.sciencedirect.com/science/article/pii/S0959652617302378

หนว ยสอ่ื สารองคก ร [email protected]

Dynamic simulation of thermal energy
storage integrated with small-scale solar
power plant and organic Rankine cycle

รศ. ดร.สรุ เทพ เขย� วหอม ภาคว�ชาวศ� วกรรมเคมี
0-2218-6893 [email protected]

ABSTRACT

A concentrating solar power (CSP) system is considered a promising technology to
harness solar energy, which is a clean and inexhaustible energy source. However, solar
power is intermittent and dynamic by its nature. Therefore, the system suffers from
operational and control issues affecting the performance of the electricity generation
system. Recent studies suggest that small-scale CSP systems with organic Rankine
cycles (ORC) have strong potential for off-grid power solution. Keys to successful
implementation of this technology lie in optimizing the solar collectors for low-tem-
perature thermal output (< 200°C) and employing automatic control to attenuate fluc-
tuating thermal input as well as electricity demand. Thus, this work aims at developing
dynamic models and implementing the simulation using a commercial simulator,
DYNSIM. Besides, comparison and discussion of the two different types of thermal
energy storage (TES) adopted in a CSP system including two-tank and packed-bed
TES, was performed. Also, control structures for the systems with both types of TES
were proposed and discussed. The two-tank TES exhibited higher performances as the
efficiency of solar collector and boiler is independent of the level of energy stored. ©
2017 Elsevier B.V.

FULL PAPER (LINK)

ดเู พิม่ เติมไดท่วี ารสาร
Computer Aided Chemical Engineering
ตีพมิ พป  2017 เดือนตุลาคม ฉบับท่ี 40 หนา 1561-1566
https://www.sciencedirect.com/science/arti-
cle/pii/B9780444639653502622?via%3Dihub

หนว ยสอ่ื สารองคก ร [email protected]

Effect of polarity and temperature on the
binary interaction between D2EHPA
extractant and organic solvents (kerosene,
n-heptane, chlorobenzene and 1-octanol):
Experimental and thermodynamics

รศ. ดร.สรุ เทพ เข�ยวหอม ภาคว�ชาว�ศวกรรมเคมี
0-2218-6893 [email protected]

ABSTRACT

The density and viscosity of binary mixtures of D2EHPA + organic solvent were
measured in the temperature range of 303.15–333.15 K and 0.1 MPa. The common
organic solvents, having different dielectric constants, namely kerosene (2.0),
n-heptane (1.92), chlorobenzene (5.62) and 1-octanol (10.3) were employed in this
work. The experimental density and viscosity data were validated employing
Nasrifar-Moshfeghian (NM) equation of state (EOS) and Vogel-Fulcher-Tammann
(VFT) equation: data correlations proved to be a good fit according to the RAD values
in the range of 0.01–2.00%. Further, the excess molar volume and viscosity deviation
were calculated in order to investigate the nature of the solute-solvent binary
mixtures. For all binary mixtures, the excess molar volume and viscosity deviations
have negative deviations from ideality over the temperature range. The strongest
interaction of D2EHPA extractant occurred in kerosene solvent affected by its large
hydrophobic molar volume. In addition, other thermodynamic properties of mixtures
such as apparent molar volume, thermal expansion coefficients, excess Gibbs energy,
enthalpy and entropy of activation of viscous flow were calculated.

FULL PAPER (LINK)

ดเู พม่ิ เติมไดท ี่วารสาร
Fluid Phase Equilibria
ตพี มิ พป 2017 เดือนกุมภาพนั ธ ฉบับที่ 434 หนา 117-129
https://www.sciencedirect.com/science/article/pii/S0378381216305830

หนว ยสอ่ื สารองคก ร [email protected]

Interpolation techniques
for robust constrained model
predictive control based
on polyhedral invariant set

รศ. ดร.สุรเทพ เข�ยวหอม ภาควช� าวศ� วกรรมเคมี
0-2218-6893 [email protected]

ABSTRACT

This work studies interpolation techniques that can be employed on
off-line robust constrained model predictive control (MPC) for a discrete
time-varying system with polytopic parametric uncertainty. A sequence of
feedback gains is determined by solving off-line a series of optimal control
optimization problems. A sequence of nested corresponding polyhedral
invariant set is then constructed. At each sampling time, the smallest invariant
set containing the current state is determined. If the current invariant set is the
innermost set, the pre-computed gain associated with the innermost set is
applied. If otherwise, a feedback gain is variable and determined by a linear
interpolation of the pre-computed gains. Two interpolation algorithms are
investigated. The proposed algorithms are illustrated with case studies of a
two-tank system and a four-tank system. The simulation results showed that
the proposed interpolation techniques can improve control performance of
off-line robust MPC while on-line computation is still tractable.

FULL PAPER (LINK)

ดเู พิม่ เตมิ ไดทีว่ ารสาร
IMA Journal of Mathematical Control and Information
ตีพมิ พป 2017 เดอื นมถิ ุนายน ฉบบั ที่ 34 หนา 501-519
https://academic.oup.com/imamci/article/34/2/501/2885225

หนว ยสอ่ื สารองคก ร [email protected]

Robust model predictive control
with time-varying tubes

รศ. ดร.สรุ เทพ เข�ยวหอม ภาควช� าว�ศวกรรมเคมี
0-2218-6893 [email protected]

ABSTRACT

This paper focuses on the problem of robustly stabilizing uncertain
discrete-time systems subject to bounded disturbances. The proposed
tube-based model predictive controller ensures that all possible realizations of
the state trajectory lie in the time-varying tubes so robust stability and
satisfaction of the state and input constraints are guaranteed. The time-varying
tubes are computed off-line so the on-line computational time is tractable.
At each sampling time, the precomputed time-varying tubes are included in the
optimal control problem as the constraints in the prediction horizon and only a
quadratic programming problem is solved. In comparison to the algorithm that
calculates the time-varying tubes on-line, the proposed algorithm can achieve
the same level of control performance while the on-line computational time is
greatly reduced.

FULL PAPER (LINK)

ดเู พ่ิมเตมิ ไดท ี่วารสาร
International Journal of Control, Automation and Systems
ตีพมิ พป 2017 เดอื นสงิ หาคม ฉบับที่ 15 หนา 1479-1484
https://link.springer.com/article/10.1007/s12555-016-0227-z

หนว ยสอ่ื สารองคก ร [email protected]

Suppression of zinc anode
corrosion for printed flexible
zinc-air battery

รศ. ดร.สรุ เทพ เขย� วหอม ภาควช� าว�ศวกรรมเคมี
0-2218-6893 [email protected]

ABSTRACT

Self-discharge caused by hydrogen evolution reaction (HER) coinciding with
corrosion of the zinc anode is a major drawback of printed zinc-air
batteries. Thus, this work aims at suppressing self-discharge of flexible printed
zinc-air batteries by coating thin layer of aluminum oxide (Al2O3) onto the
surface of zinc particles.The (Al2O3) coating layer was directly synthesized onto
the zinc particles by a low-cost and facile sol–gel method. The (Al2O3) coating
effectively mitigated HER of the zinc particles, and delayed the corrosion of the
zinc anode. Further, the effects of the thickness of (Al2O3) layer on corrosion
behavior of the zinc anode in 9 M potassium hydroxide as well as performance
of the batteries were investigated. With a proper thickness of (Al2O3) coating,
corrosion of the battery was considerably suppressed without sacrificing the
battery performance. (a) Photographic image of the fabricated battery,
(b) transmission electron microscopic image of zinc particle coated with
(Al2O3).

FULL PAPER (LINK)

ดูเพิม่ เติมไดท ว่ี ารสาร
Physica Status Solidi (B) Basic Research
ตีพมิ พป  2017 เดอื นกุมภาพันธ ฉบับที่ 254 หมายเลขบทความ 1600442
https://onlinelibrary.wiley.com/doi/abs/10.1002/pssb.201600442

หนว ยสอ่ื สารองคก ร [email protected]

Printed transparent thin film
Zn-MnO2 battery

รศ. ดร.สรุ เทพ เขย� วหอม ภาควช� าวศ� วกรรมเคมี
0-2218-6893 [email protected]

ABSTRACT

In this work, transparent thin film zinc-manganese dioxide (Zn-MnO2) batteries
were fabricated using an inexpensive screen-printing technique. Both electrodes
were fabricated as micro-electrode arrays with feature size of 50 μm, which are
below resolution of human eyes. Thus, the electrodes appeared transparent.
Moreover, a transparent alkaline polymer gel electrolyte (PGE) film prepared by
polymerization of acrylate, potassium hydroxide and water was used as a
quasi-solid-state electrolyte. The PGE film functioned as both an electrolyte and an
insulator/separator. Three patterns of the micro-electrodes with different
percentages of opening area (75%, 80% and 85%) were investigated. The
open-circuit voltages of the batteries fabricated were 1.25 V. Ohmic loss zones were
0.1–2.0 mA.cm− 2. The battery with an opening area of 80% provided an average
transparency of 90% without significantly affecting battery performance. Moreover,
energy density of the battery could be further increased by increasing the thickness
of the electrodes. By increasing the thickness of the micro-electrodes upto 80 μm,
energy density of the battery was significantly enhanced without loosing its
transparency.

FULL PAPER (LINK)

ดเู พิม่ เติมไดทวี่ ารสาร
Journal of the Electrochemical Society
ตีพิมพป 2017 ฉบบั ที่ 164 หนา A859-A863

http://jes.ecsdl.org/content/164/4/A859

หนว ยสอ่ื สารองคก ร [email protected]

หนว ยสอ่ื สารองคก ร [email protected]

Development of non-water soluble,
ductile mung bean starch based
edible film with oxygen barrier
and heat sealability

รศ. ดร.อนงคนาฏ สมหวงั ธนโรจน ภาคว�ชาวศ� วกรรมเคมี
0-2218-6864 [email protected]

ABSTRACT

This research determined the effects of starch concentration (3.5–5.0%w/w),
and plasticizer [glycerol (0–30%w/w) or sorbitol (0–60%w/w)] on properties of
mung bean starch (MBS) films. The result showed that increasing plasticizer
concentration tended to decrease tensile strength (TS), elastic modulus (EM)
and oxygen permeability (OP); but increase elongation (%E), solubility, water
vapor permeability (WVP) and seal strength. The extent of those changes also
depended on starch concentration. Glycerol provided better plasticizer
efficiency than sorbitol. A bimodal melting endotherm of retrograded structure
was evident in non-plasticized film. However, only a low temperature
endotherm was observed in polyol-plasticized films, indicating a plasticizer-
induced structural modification. The developed ductile MBS films, (TS of 7.14 ±
0.95 to 46.30 ± 3.09 MPa, %E of 2.46 ± 0.21 to 56.95 ± 4.34% and EM of 16.29 ±
3.40 to 1428.45 ± 148.72 MPa) with an OP of 0.2397 ± 0.0365 to 1.1520 ± 0.1782
cc mm/m2 day kPa and seal strength up to 422.36 ± 7.93 N/m, demonstrated in
this study indicate the potential for food packaging applications.

FULL PAPER (LINK)

ดเู พ่มิ เตมิ ไดท วี่ ารสาร
Carbohydrate Polymers
ตพี มิ พป  2017 เดอื นกุมภาพันธ ฉบับที่ 157 หนา 748-756
https://www.sciencedirect.com/science/article/pii/S014486171631061X

หนว ยสอ่ื สารองคก ร [email protected]

Effect of azodicarbonamide on
microstructure, cure kinetics and
physical properties of natural
rubber foam

รศ. ดร.อนงคนาฏ สมหวังธนโรจน ภาคว�ชาวศ� วกรรมเคมี
0-2218-6864 [email protected]

ABSTRACT

The effect of azodicarbonamide as chemical blowing agent on the morphology, cure
kinetics and physical properties of natural rubber foam is investigated. From the
morphology, when the amount of chemical blowing agent increases from 3 to 4 phr,
the bubble size in the rubber matrix slightly decreases due to the increase of
vulcanization reaction rate from the presence of amine fragment species as
by-products from the decomposition of azodicarbonamide. The coalescence between
bubbles is observed in the specimen with 5 and 6 phr of azodicarbonamide owing to
high gas content in the rubber matrix. Moreover, the scorch time slightly reduces and
cure rate increases as a function of azodicarbonamide content. The autocatalytic model
can be used to explain the curing reaction and mechanism of this natural rubber foam.
Furthermore, the activation energy (Ea) directly relates to the bubble size and microvoid
structure of natural rubber foam. When compared with the vulcanized natural rubber
without adding chemical blowing agent, it is found that the bulk density of natural
rubber foam significantly decreases and the volumetric expansion ratio of natural
rubber foam increases at high content of chemical blowing agent. Moreover, natural
rubber foam at 4 phr of azodicarbonamide exhibits the lowest thermal expansion
coefficient due to the smallest bubble size with less coalescence.

FULL PAPER (LINK)

ดูเพ่มิ เติมไดท ี่วารสาร
Journal of Cellular Plastics
ตพี ิมพป  2017 เดือนพฤษภาคม ฉบบั ท่ี 53 หนา 287-303
http://journals.sagepub.com/doi/10.1177/0021955X16652101

หนว ยสอ่ื สารองคก ร [email protected]

Improvements in morphology,
mechanical and thermal properties
of films produced by reactive blending
of poly(lactic acid)/natural rubber latex
with dicumyl peroxide

รศ. ดร.อนงคน าฏ สมหวังธนโรจน ภาคว�ชาวศ� วกรรมเคมี
0-2218-6864 [email protected]

ABSTRACT

The effect of dicumyl peroxide (DCP) as a free-radical cross-linking agent on the morphology, thermal and mechanical
properties, and gas permeation of blown films prepared by reactive blending of poly(lactic acid) (PLA) and natural
rubber latex was investigated. In comparison to the blown films without DCP, SEM micrographs revealed that the
amount of debonded rubber domains from the cryofractured surface reduced considerably. This was when DCP at 0.003
phr was incorporated and the free radicals from thermally decomposed DCP reacted with PLA and NR chains,
generating PLA–NR copolymers and cross-linked NR as confirmed by FTIR spectra. These PLA–NR copolymers acted as
compatibilizers, which increased the strength at the PLA/NR interfaces, leading to the improvement in tensile strength,
elongation at break, tensile toughness, impact strength, and tear strength. Although DCP did not influence the cold
crystallization of PLA, TGA thermograms showed that thermal stability slightly increased owing to the enhanced
interfacial adhesion. However, the addition of DCP at 0.005 and 0.010 phr resulted in a high content of cross-linked NR
gel, by consuming the free radicals instead in copolymer formation. Therefore, the compatibilization efficiency was
significantly reduced and the mechanical properties of reactive PLA/NR blown films finally dropped. Also, this poor
interfacial adhesion facilitated the microvoid formation at the polymer–rubber interface as a result of mechanical
stretching upon the film blowing process, increasing the permeation of water vapor and oxygen molecules. According
to our study, it can be summarized that to optimize the morphology, mechanical properties, and gas permeation
property of the free radical-assisted reactive blends, it is of great concern to carefully balance reactive compatibilizer
formation and gel formation by adjusting the DCP content.

FULL PAPER (LINK)

ดูเพมิ่ เติมไดท วี่ ารสาร
Iranian Polymer Journal
ตพี มิ พป 2017 เดอื นสงิ หาคม ฉบบั ที่ 26 หนา 615-628
https://link.springer.com/article/10.1007/s13726-017-0547-8

หนว ยสอ่ื สารองคก ร [email protected]

Influence of sulfenamide accelerators
on cure kinetics and properties of
natural rubber foam

รศ. ดร.อนงคน าฏ สมหวังธนโรจน ภาควช� าวศ� วกรรมเคมี
0-2218-6864 [email protected]

ABSTRACT

The effect of types of sulfenamide accelerator, i.e., 2‐morpholinothiobenzotiazole
(MBS), N‐t‐butylbenzothiazole‐2‐sulfenamide (TBBS), and N‐cyclohexyl
benzothiazole‐2‐sulfenamide (CBS) on the cure kinetics and properties of natural
rubber foam was studied. It has been found that the natural rubber compound with
CBS accelerator shows the fastest sulfur vulcanization rate and the lowest activation
energy (Ea) because CBS accelerator produces higher level of basicity of amine species
than other sulfenamide accelerators, further forming a complex structure with zinc ion
as ligand in sulfur vulcanization. Because of the fastest cure rate of CBS accelerator,
natural rubber foam with CBS accelerator shows the smallest bubble size and
narrowest bubble size distribution. Moreover, it exhibits the lowest cell density, thermal
conductivity and thermal expansion coefficient, as well as the highest compression set
as a result of fast crosslink reaction.

FULL PAPER (LINK)

ดูเพ่ิมเตมิ ไดท่ีวารสาร
Journal of Applied Polymer Science
ตพี ิมพป 2017 เดอื นพฤษภาคม ฉบบั ที่ 134 หมายเลขบทความ 44822
https://onlinelibrary.wiley.com/doi/abs/10.1002/app.44822

หนว ยสอ่ื สารองคก ร [email protected]

Influence of packaging and storage
conditions on quality parameters and
shelf life of solar-dried banana

รศ. ดร.อนงคน าฏ สมหวังธนโรจน ภาควช� าวศ� วกรรมเคมี
0-2218-6864 [email protected]

ABSTRACT

Effects of packaging materials (metalized or polylactic acid, PLA, based pouches),
storage temperatures (30-50°C) and time (up to 6 months) on quality of solar-dried
banana were investigated. At 30°C in both packaging materials, change in moisture
content, water activity (aw) and hardness were minimal while darkening of the surface
color progressed. No microbial spoilage was found. Hedonic scores of color, flavor,
taste, texture and overall acceptance of the 6th month aged samples were lowest (p≤
0.05). Based on the sensory test, product packed in both packaging materials had shelf
life of 5 months at 30°C. Higher storage temperature greatly induced time-dependent
decrease in moisture content and aw with an increase in hardness, especially for the
samples in PLA-based pouches. Fractional conversion model was used to predicted
time-dependent change in total color difference (∆E) (R2 ≥ 0.84). Temperature depen-
dence of the rate constant followed Arrhenius-type relationship (R2 ≥ 0.99).

FULL PAPER (LINK)

ดเู พ่มิ เติมไดทว่ี ารสาร
Songklanakarin Journal of Science and Technology
ตีพิมพป  2017 ฉบบั ท่ี 39 หนา 253-260

http://doi.nrct.go.th//ListDoi/listDetail?Resolve_DOI=10.14456/sjst-psu.2017.29

หนว ยสอ่ื สารองคก ร [email protected]

Storage stability of packaged baby
formula in poly (lactide)-whey protein
isolate laminated pouch

รศ. ดร.อนงคน าฏ สมหวังธนโรจน ภาควช� าวศ� วกรรมเคมี
0-2218-6864 [email protected]

ABSTRACT

The use of biodegradable polymeric materials has been proposed as
an environmentally‐friendly alternative to petroleum‐based packaging.
To extend the shelf life of food products, these bioplastics must possess
appropriate barrier properties and food‐package stability. In the pres-
ent study, shelf life analysis of packaged baby formula in
biopolymeric, multilayer film, fabricated from poly(lactide) (PLA) and
whey protein isolate (WPI), PLA/WPI/PLA and PLA pouches was
performed at 4–35 oC and 50–59% relative humidity.

FULL PAPER (LINK)

ดเู พิ่มเติมไดท ว่ี ารสาร
Journal of the Science of Food and Agriculture
ตพี มิ พป 2017 เดอื นสงิ หาคม ฉบับท่ี 97 หนา 3365-3373
https://onlinelibrary.wiley.com/doi/abs/10.1002/jsfa.8187

หนว ยสอ่ื สารองคก ร [email protected]