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An Evaluation on Physical Characteristics of Konjac Polysaccharides-Based Film Coating and Its Application for Strawberries Preservation

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Journal of Renewable materials 2025年第1期13卷 181-197页

作者： Desy Nurliasari Awaly Ilham Dewantoro Muhammad Adly Rahandi Lubis Roni Kastaman Mohamad Djali Efri Mardawati Devi Maulida Rahmah Siti Nurhasanah Akbar Hanif Dawam Abdullah Lukmanul Hakim Zaini Department of Agricultural Industrial Technology Faculty of Agro-Industrial TechnologyUniversitas PadjadjaranJatinangor45363Indonesia Research Center for Biomass and Bioproducts National and Innovation AgencyCibinong1691Indonesia Research Collaboration Center for Biomass and Biorefinery between BRIN and Universitas Padjadjaran Jatinangor45363Indonesia Research Center for Appropriate Technology Universitas PadjadjaranJatinangor45363Indonesia Department of Food Industrial Technology Faculty of Agro-Industrial TechnologyUniversitas PadjadjaranJatinangor45363Indonesia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor16680Indonesia Institute of Wood Technology and Renewable Materials Department of Material Sciences and Process EngineeringUniversity of Natural Resources and Life SciencesVienna(BOKU)Vienna1180Austria

Konjac is an ideal candidate for edible coatings on fruits due to its hydrophilic properties,ﬁlm-forming ability,barrier properties,safety,and ***,the high market demand for strawberries necessitates post-harvest treatment to extend their shelf life and preserve their quality,as strawberries are known for their fragile skin and soft *** fully utilize konjac and develop high-quality coatingﬁlms,native konjacﬂour(NKF)and konjac glucomannan(KGM)were extracted from its corm and used as a coatingﬁlm for strawberries in the present ***,this study aimed to compare the physical properties of theﬁlm coatings between NKF and KGM,and evaluate their effects on strawberries preservation over 7 days of storage.A multistage extrac-tion process was employed to isolate NKF and KGM,after which the glucomannan content was *** yield was 31.81%,exceeding KGM yield of 26.42%,and the glucomannan content obtained of NKF(25.93%)was higher than KGM(21.41%).Nuclear magnetic resonance spectroscopy conﬁrmed that both NKF and KGM con-tain glucomannan in their ***,both NKF and KGM were combined with carboxymethyl cel-lulose(CMC)and glycerol to produce eight thin-layerﬁlms to assess their physical and mechanical *** to the KGM variant,the NKF variant generally exhibited higher moisture content,water vapor trans-mission rate,and tensile ***,NKF was less effective than KGM in extending strawberry storage life,leading to faster color changes and greater weight loss,despite maintaining similar hardness ***,konjac-based coatings were generally effective at maintaining the freshness and quality of strawberries compared to uncoated *** shows promise as an edible coating,improving fresh produce shelf life and appeal,aligning with consumer preferences for natural and sustainable products.

关键词： Amorphophalus oncophyllus coating performances edibleﬁlm strawberry preservation

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Effects of Refined Coconut Oil and Vegetable Oil on the Mechanical, Thermal, Morphological, and Biodegradable Properties of Cassava Starch-Based Thermoplastic (TPS) Films 13th

Effects of Refined Coconut Oil and Vegetable Oil on the Mech...

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ICSBE 2022 - Proceedings of the 13th International Conference on Sustainable Built Environment

作者： Fernando, N.M.L. Amaraweera, S.M. Gunawardene, O.H.P. Wanninayaka, W.M.D.B. Gunathilake, C.A. Manamperi, W.A. Kulatunga, A.K. Manipura, A. Department of Manufacturing and Industrial Engineering University of Peradeniya Peradeniya Sri Lanka Department of Chemical and Process Engineering University of Peradeniya Peradeniya Sri Lanka Department of Material and Nano Science Technology Wayamba University of Sri Lanka Kuliyapitiya Sri Lanka Materials Engineering Department California Polytechnic State University San Luis ObispoCA United States

ISBN: (纸本)9789819934706

The effect of addition of different concentrations of refined coconut oil (CO) and vegetable oil (palm olein oil) (VO) on the mechanical and thermal properties, as well as water absorption, biodegradability and morphology of cassava starch-based TPS films were investigated. Cassava starch-based TPS films were prepared by the solvent casting method using glycerol as the plasticizer incorporation with varying concentrations of CO and VO at 5,10,20, and 40 wt % based on cassava starch. The X-ray diffractometry (XRD), fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) analysis were carried out to observe the interactions between the starch matrix and oil, thermal stability, decomposition temperature and morphology of films. An increase in tensile strength was observed with the increment of both CO and VO concentration while the maximum tensile strength was observed at the oil concentration of 10 wt % for both CO and VO. However, films containing VO have higher tensile strength (4.18 MPa) than the films containing CO (3.56 MPa). Tensile strain at break decreased when increasing the oil concentration up to 10 wt % for both CO and VO. Water absorption of the films increased when increasing the oil concentration. However, the value was less than the reference sample until the oil concentration was 20 wt % for both CO and VO. Moreover, all the samples are biodegradable. Cassava starch, refined coconut oil, and vegetable oil are natural resources that can be used to produce alternative materials that cause minor environmental impact. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Tensile strength

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Effect of Malic Acid as a Compatibilizer in Chemically Modified Cassava Starch/Polyvinyl Alcohol Blends for Potential Packaging Applications 13th

Effect of Malic Acid as a Compatibilizer in Chemically Modif...

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ICSBE 2022 - Proceedings of the 13th International Conference on Sustainable Built Environment

作者： Gunawardene, O.H.P. Amaraweera, S.M. Wannikayaka, W.M.D.B. Fernando, N.M.L. Gunathilake, C.A. Manamperi, W.A. Kulatunga, A.K. Manipura, A. Department of Chemical and Process Engineering University of Peradeniya Peradeniya Sri Lanka Department of Manufacturing and Industrial Engineering University of Peradeniya Peradeniya Sri Lanka Department of Material and Nano Science Technology Wayamba University of Sri Lanka Kuliyapitiya Sri Lanka Materials Engineering Department California Polytechnic State University San Luis ObispoCA United States

ISBN: (纸本)9789819934706

There has been a growing interest in developing biodegradable materials due to the continuous accumulation of non-degradable plastic wastes across the globe. Therefore, this work focuses on producing and evaluating ‘green’ multifunctional film materials based on a mixed eco-friendly thermoplastic starch (TPS)/polyvinyl alcohol (PVA) matrix compatibilized with malic acid. In this study, the blend films of TPS/PVA were prepared by adopting the solution casting method. Herein, a starch modification was performed under acidic conditions using tetraethyl orthosilicate (TEOS) as the chemical modifying agent. The prepared blends were characterized using Fourier transforms infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). Moreover, the water absorption and tensile tests were also carried out according to ASTM standards. The biodegradability test was carried out according to the aerobic compost environment test. The results of FTIR analysis confirmed the successful preparation of modified cassava starch which exhibited enhanced thermal stability and crystallinity. Further, the compatibilized blends exhibited enhanced thermal, mechanical, and water-resistant properties with improved blend homogeneity. This suggested the possibility of occurring crosslinking reactions among starch, PVA, glycerol, and malic acid upon compatibilization while possessing a dense molecular structure. The biodegradation was slowed upon both starch modification and compatibilization whereas the least water absorption capacity was demonstrated by the TPS/PVA (40/60 w/w) blend compatibilized with 5 wt.% malic acid (M4P6-M5) valuing 28.89% and 42.17% at 2 and 24 h, respectively. Besides, improved mechanical properties could be obtained by the same blend film valuing 36.25 MPa and 162.91% for tensile strength and elongation at break, respectively. Therefore, enhanced mechanical and ther

关键词： Scanning electron microscopy

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Effect of Intermediate Annealing Temperature and Cold Rolling Deformation on the Texture of Yttrium-Oriented Silicon Steel

SSRN

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SSRN 2024年

作者： Guo, Zhihong Liu, Pengjun Ma, Yize Zheng, Yaxu Liu, Yu Zhu, Liguang Zhang, Yuanxiang Zhang, Di Wang, Bo Feng, Jie Lu, Suling School of Material Science and Engineering Hebei Short Process Steel Making Technology Innovation Center Hebei University of Science and Technology Shijiazhuang050018 China School of Material Science and Engineering State Key Laboratory of Rolling Technology and Automation Northeastern University Shenyang110003 China College of Materials Science and Engineering Chongqing University Chongqing400045 China

This study investigates the impact of intermediate annealing temperature on the microstructure and texture of oriented silicon steel. The steel samples were annealed at temperatures of 850℃, 900℃, and 940℃ under different cold rolling deformation conditions. Furthermore, the study examines the influence of adding rare earth Y on the microstructure and texture of the steel after intermediate annealing. Additionally, the research reveals the mechanism by which precipitation affects the microstructure and texture of the intermediate annealed plate of oriented silicon steel. The results indicate that the average grain size of the intermediate annealing plate decreases gradually as the cold-rolled deformation increases. The annealing plate subjected to 60% cold rolling exhibited a Goss texture with an area fraction of 2.78%, while the 72% cold-rolled annealing plate predominantly exhibited a strong Goss texture along with some {114} and {110} textures. The 86% cold-rolled annealing plate displayed a diffuse recrystallization texture, with some textures near {100} and {411}, and formed a Goss texture with an area fraction of 2.21%. Moreover, as the annealing temperature increased, the grain size gradually increased, but the microstructure uniformity decreased. Additionally, different textures were observed within the intermediate annealed plate at different temperatures. Precipitate analysis reveals that samples without Y mainly contain Al2O3 and MnS, while samples with Y contain AlN, YS, and YOxSy. Furthermore, the addition of rare earth Y reduces the density and size of the precipitates. The size of second phase particles decreases and the amount of precipitation increases with higher intermediate annealing temperatures. © 2024, The Authors. All rights reserved.

关键词： Textures

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Ionic liquids/deep eutectic solvents for CO_(2) capture:Reviewing and evaluating

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Green Energy & Environment 2021年第3期6卷 314-328页

作者： Yanrong Liu Zhengxing Dai Zhibo Zhang Shaojuan Zeng Fangfang Li Xiangping Zhang Yi Nie Lei Zhang Suojiang Zhang Xiaoyan Ji Energy Engineering Division of Energy ScienceLuleåUniversity of TechnologyLuleåSweden Swerim AB Box 812SE-97125LuleåSweden State Key Laboratory of Material-Oriented Chemical Engineering Nanjing Tech UniversityNanjingChina CAS Key Laboratory of Green Process and Engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijingChina Zhengzhou Institute of Emerging Industrial Technology ZhengzhouChina College of Materials Science and Engineering Fujian University of TechnologyFuzhouFujian350118China School of Chemical Engineering University of Chinese Academy of SciencesBeijingChina

The CO_(2)solubilities(including CO_(2)Henry’s constant)in physical-and chemical-based ILs/DESs and the COSMO-RS models describing these properties were comprehensively collected and *** summarized results indicate that chemical-based ILs/DESs are superior to physical-based ILs/DESs for CO_(2)capture,especially those ILs have functionalized cation and anion,and superbase DESs;some of the superbase DESs have higher CO_(2)solubilities than those of ILs;the best physical-and chemical-based ILs,as well as physical-and chemicalbased DESs are[BMIM][BF4](4.20 mol kg^(-1)),[DETAH][Im](11.91 mol kg^(-1)),[L-Arg]-Gly 1:6(4.92 mol kg^(-1))and TBD-EG 1:4(12.90 mol kg^(-1)),*** the original COSMO-RS mainly providing qualitative predictions,six corrected COSMO-RS models have been proposed to improve the prediction performance based on the experimental data,but only one model is with universal *** newly determined experimental results were further used to verify the perditions of original and corrected COSMO-RS *** comparison indicates that the original COSMO-RS qualitatively predicts CO_(2)solubility for some but not all ILs/DESs,while the quantitative prediction is incapable at *** original COSMO-RS is capable to predict CO_(2)Henry’s constant qualitatively for both physical-based ILs and DESs,and quantitative prediction is only available for *** the corrected COSMO-RS models,only the model with universal parameters provides quantitative predictions for CO_(2)solubility in physical-based DESs,while other corrected models always show large deviations(>83%)compared with the experimental CO_(2)Henry’s constants.

关键词： Ionic liquid Deep eutectic solvent CO_(2)solubility Henry’s constant COSMO-RS

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Gas-phase synthesis of Ti_(2)CCl_(2) enables an efficient catalyst for lithiumsulfur batteries

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The Innovation 2024年第1期5卷 33-40页

作者： Maoqiao Xiang Zihan Shen Jie Zheng Miao Song Qiya He Yafeng Yang Jiuyi Zhu Yuqi Geng Fen Yue Qinghua Dong Yu Ge Rui Wang Jiake Wei Weiliang Wang Haiming Huang Huigang Zhang Qingshan Zhu Chuanfang John Zhang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China China Nuclear Power Engineering Co. Ltd.117 West Third Ring RoadNorth SectionBeijing 100840China College of Materials Science&Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Physics Guangdong Province Key Laboratory of Display Material and TechnologyCenter for Neutron Science and TechnologySun Yat-sen UniversityGuangzhou 510275China Solid State Physics&Material Research Laboratory School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China

MXenes have aroused intensive enthusiasm because of their exotic properties and promising ***,to date,they are usually synthesized by etching *** synthetic technologies provides more opportunities for innovation and may extend unexplored ***,we report a bottom-up gas-phase synthesis of Cl-terminated MXene(Ti_(2)CCl_(2)).The gas-phase synthesis endows Ti_(2)CCl_(2) with unique surface chemistry,high phase purity,and excellent metallic conductivity,which can be used to accelerate polysulfide conversion kinetics and dramatically prolong the cyclability of Li-S ***-depth mechanistic analysis deciphers the origin of the formation of Ti_(2)CCl_(2) and offers a paradigm for tuning MXene chemical vapor *** brief,the gas-phase synthesis transforms the synthesis of MXenes and unlocks the hardly achieved potentials of MXenes.

关键词： synthesis phase lithium

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The effects of a compatibilizer for improving mechanical properties on polymer matrix composites 11th

The effects of a compatibilizer for improving mechanical pro...

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11th International Conference on materials and Manufacturing technology, ICMMT 2020

作者： Nuyang, Prathumrat Wiriya-Amornchai, Atiwat Cheewawuttipong, Watthanaphon Material and Process Engineering Technology Faculty of Engineering and Technology King Mongkut’s University of Technology North Bangkok Rayong Campus Thailand Industry Engineering Faculty of Engineering Rajamangala University of Technology Srivijaya Songkla Campus Thailand

ISBN: (纸本)9783035737226

The effect of compatibilizer agent was studied when adding Aluminum fine powder (Al) to reinforce in Polypropylene (PP) by compared between polymer matrix composites (PMCs) and PMCs added Polypropylene graft maleic anhydride (PP-g-MAH).The average particle size of the aluminum fine powder was around 75 μm filled in polypropylene with different proportions of 2.5, 5, 7.5 and 10wt%. PMCs were prepared using the internal mixer. The results found that when the amount of aluminum fine powder increased, the mechanical properties had changed, i.e., tensile strength, and Young’s Modulus increased, while the impact strength and elongation at break decreased. But, when adding compatibilizer 1wt% it was found that the trend of tensile strength, and Young’s Modulus increased that compared with non-compatibilizer, but the impact strength and elongation at break decreased. The part of the morphology of PMCs with non-compatibilizer was found that the particle of aluminum fine powder dispersed in the matrix phase, but there were many micro voids between filler and matrix. But, PMCs with compatibilizer caused the microvoids between filler and matrix to be reduced. © 2021 Trans Tech Publications Ltd, Switzerland.

关键词： Polymer matrix composites

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Constructing Mo2C/MoS2 heterojunction nanostructure as outstanding catalysts for CO2 hydrogenation

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Journal of Industrial and engineering Chemistry 2025年

作者： Zhang, Yumin Luo, Min Sun, Yanyang Xiao, Linfei Wu, Wei National Center for International Research on Catalytic Technology Key Laboratory of Chemical Engineering Process & Technology for High-Efficiency Conversion College of Heilongjiang Province School of Chemistry and Material Sciences Heilongjiang University Harbin150080 China

The utilization of CO2 to produce clean energy has become an inevitable trend in the global energy sector. Methanol, as an efficient energy storage chemical and a promising future alternative fuel, can be synthesized through the CO2 hydrogenation with green hydrogen. In this work, Mo2C/MoS2-T catalysts with heterojunction nanostructures were synthesized using a surface carbonization strategy. The influence of carbonization temperature on the structural and morphological properties of the catalysts was systematically examined, with subsequent evaluation of their catalytic performance for synthesizing methanol from CO2 hydrogenation. In situ diffuse reflectance infrared Fourier transform spectroscopy experiments revealed the coexistence of both formate route and CO route during CO2 hydrogenation over the Mo2C/MoS2-T catalysts. Under the optimal reaction conditions, the Mo2C/MoS2-800 catalyst presented exceptional catalytic performance, achieving a 10.8 % conversion of CO2 with a 95.4 % selectivity of methanol. Furthermore, the catalyst demonstrated exceptional long-term stability, maintaining consistent catalytic activity without noticeable deactivation during 150 h of continuous operation. This study establishes a straightforward yet effective strategy for the rational design of high-performance MoS2-based catalysts, providing significant potential for industrial applications in CO2 hydrogenation to methanol production. © 2025

关键词： Hydrogenolysis

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Preparation of tungsten-iron composite oxides and application in environmental catalysis for volatile organic compounds degradation

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Tungsten 2022年第1期4卷 38-51页

作者： Jiang Liu Song-Lin Wang Ji-Li Xuan Bo-Fang Shan Hong Luo Li-Ping Deng Peng Yang Chen-Ze Qi Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process School of Chemistry and Chemical EngineeringShaoxing UniversityShaoxing 312000China School of Chemistry and Chemical Engineering Henan Institute of Science and TechnologyXinxiang 453003China Zhejiang Hengfeng New Material Co. LTDShaoxing 312000China State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China

Emission of volatile organic compounds has important influence on complex air pollution and human *** this paper,a series of tungsten-iron composite oxides with different proportions and preparation methods were synthesized and first used for catalytic combustion of chlorobenzene and toluene,as typical polluting gas *** WO_(3)-based solid catalytic materials were systematically characterized by modern analytical methods,and the results showed that there was strong electron interaction between W and Fe elements in the composite oxides,and the presence of a certain amount of tungsten oxide inhibited the crystallization of iron oxide,and vice versa,which were beneficial to the uniform dispersion of tungsten-iron components into each other and the improvement of redox *** with single-component oxide,the formation of tungsten-iron composite oxide affected the micro-structure,improved the specific surface area and optimized the pore structure of *** performance test results showed that the tungsten-iron composite oxide(FeWO_4-0.5 Fe_(2)O_(3),molar ratio of tungsten and iron was 1/2)prepared using citric acid-based sol-gel method was the optimal,and its catalytic degradation efficiency could reach 90%for chlorobenzene and 83%for toluene at 320℃,and maintain at least 60 h without obvious deactivation,with high selectivity to the formation of HCl and CO_(2).

关键词： Volatile organic compounds Catalytic combustion WO_(3) FeWO_4 Composite oxide Synergistic catalytic effect

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Highly Scalable Vertical Bypass RRAM (VB-RRAM) for 3D V -NAND Memory

Highly Scalable Vertical Bypass RRAM (VB-RRAM) for 3D V -NAN...

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Symposium on VLSI technology

作者： Geonhui Han Youngdong Kim Jaeseon Kim Dongmin Kim Yoori Seo Chuljun Lee Jinmyung Choi Jinwoo Lee Dongho Ahn Sechung Oh Donghwa Lee Hyunsang Hwang Department of Material Science and Engineering Pohang University of Science and Technology (POSTECH) Pohang Korea Advanced Process Development Team 2 Samsung Electronics Gyeonggi-do Republic of Korea

ISBN: (数字)9798350361469

ISBN: (纸本)9798350361476

We firstly demonstrate highly scalable interface type RRAM based 3D V-NAND memory with WOx resistivity switching (RS) layer and IGZO selector transistor (Tr). 3D vertical interface type RRAM integrated with IGZO Tr (VB-RRAM), utilizing bypass reading between Tr and RS layer, exhibits low voltage operation (< 5 V), multi-bit (4 bit) capability, and high uniformity of the RS layer while improving the limitations of on/off ratio. Furthermore, with scaling the channel length down to 30 nm, we achieved fast switching speed (~50 us), stable endurance (> 10 7 cycles), and low switching energy consumption (5 fJ). Finally, critical V-NAND issues like read disturbance and interface layer were also evaluated.

关键词： Low voltage Energy consumption Three-dimensional displays Switches Very large scale integration Conductivity Transistors

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