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Preparation and Characteristics of Poly(butylene adipate-coterephthalate)/Polylactide Blend Films via Synergistic Efficiency of plasticization and Compatibilization

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Chinese Journal of Polymer Science 2019年第1期37卷 68-78页

作者： Worasak Phetwarotai Neeranuch Phusunti Duangdao Aht-Ong Department of Materials Science and Technology Faculty of Science Prince of Songkla University Bioplastic Research Unit Department of Materials Science and Technology Faculty of Science Prince of Songkla University Department of Chemistry Faculty of Science Prince of Songkla University Department of Materials Science Faculty of Science Chulalongkorn University Center of Excellence on Petrochemical and Materials Technology

Polylactide(PLA)films blended with poly(butylene adipate-co-terephthalate)(PBAT)were hot melted using a twin screw extruder with the addition of triethyl citrate(TEC)as a plasticizer and toluene diisocyanate(TDI)as a compatibilizer.The synergistic effects of the two additives on the mechanical,thermal,and morphological properties of the PLA/PBAT blend films were investigated.The influence of TEC content on the plasticized PLA films and the effect of TDI’s presence on the PLA/PBAT blend films were also studied by comparing them with neat PLA.The results showed a pronounced increase in elongation at break of the plasticized PLA films with increasing TEC levels,but a slight reduction in thermal stability.Also,the addition of TEC and TDI to the blend system not only synergistically enhanced the tensile properties and tensile-impact strength of the PLA/PBAT blends,but also affected their crystallinity and cold crystallization rate,a result of the improvement of interfacial interaction between PLA and PBAT,including the enhancement of their chain mobility.The synergy of the plasticization and compatibilization processes led to the improvement of tensile properties,tensile-impact strength,and compatibility of the blends,accelerating cold crystallization without affecting crystallization.

关键词： Polylactide plasticization Compatibilization Blend Crystallization

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Recent developments of anti-plasticized membranes for aggressive CO_(2)separation

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Green Chemical Engineering 2023年第1期4卷 1-16页

作者： Yongchao Sun Xiaoyu Wang Xiangcun Li Wu Xiao Yan Dai Canghai Ma Gaohong He State Key Laboratory of Fine Chemicals R&D Center of Membrane Science and TechnologySchool of Chemical EngineeringDalian University of TechnologyDalian116023China Panjin Institute of Industrial Technology Liaoning Key Laboratory of Chemical Additive Synthesis and SeparationDalian University of TechnologyPanjin124221China

Membrane separation technology provides an effective alternative to mitigate the massive carbon emission with high carbon capture productivity and efficiency.In the context of operating membranes under high CO_(2)pressures allows increased separation productivity and reduced gas compression cost,which,however,often leads to CO_(2)induced plasticization,a key hurdle for current gas separation membranes.In this review,we reviewed the latest development of membranes with anti-plasticization resistance,potentially suited for operation under high CO_(2)feed streams.Specifically,the separation performance of polymeric membranes,inorganic membranes,and mixed matrix membranes under high CO_(2)feed pressures are discussed.Approaches to enhance CO_(2)induced plasticization of those membranes are also summarized.We conclude the recent progress of membranes for high CO_(2)pressures with perspectives and an outlook for future development.

关键词： Carbon dioxide High feed pressure plasticization Polymeric membranes Inorganic membranes Mixed matrix membranes

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Ultrathin poly(cyclocarbonate-ether)-based composite electrolyte reinforced with high-strength functional skeleton

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Journal of Energy Chemistry 2023年第6期81卷 603-612,I0013页

作者： Xiaojiao Zheng Da Xu Ning Fu Zhenglong Yang Shanghai Key Laboratory of D&A for Metal-Functional Materials School of Materials Science and EngineeringTongji UniversityShanghai 200092China School of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000HenanChina

Composite polymer electrolytes(CPEs)are considered to be the most promising to break through the performance and safety limitations of traditional lithium-ion batteries because of their excellent electrochemical and mechanical properties.Aiming at the performance limitations of the most common polyether matrix such as poly(ethylene oxide)(PEO),a novel poly(cyclocarbonate-ether)polymer matrix was prepared by in-situ thermal curing,the weaker interaction between its C=O bond and Li^(+)can promote the rapid transport of Li^(+).Adding ionic liquid and active filler LLZTO to the matrix can synergistically reduce the crystallinity of matrix and promote the dissociation of lithium salts.In addition,a 3D functional skeleton made of polyacrylonitrile(PAN)and lithium fluoride(LiF)can greatly improve the mechanical strength of polymer matrix after cold pressing,and Li F is also conducive to interface stability.The thickness of the optimal sample(VP6L/CPL)was only 25μm,and its ionic conductivity,lithium ion transference number,and electrochemical stability window were as high as 7.17×10^(-4)S cm^(-1)(25℃),0.54 and 5.4 V,respectively,while the mechanical strength reaches 6.1 MPa,which can fully inhibit the growth of lithium dendrites.The excellent electrochemical performance and mechanical strength enable the assembled Li|VP6L/CPL|Li battery to be continuously charged for over 200 h and cycled stably for more than 2300 h,and Li|VP6L/CPL|LFP battery can be stably cycled for more than 400 and 550 cycles at 1 C(40℃)and 0.5 C(25℃),respectively.

关键词： Composite polymer electrolytes Polymer matrix 3D functional skeleton plasticization Synergistic effect

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The effects of maltodextrin/starch in soy protein isolate–wheat gluten on the thermal stability of high-moisture extrudates

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Journal of Integrative Agriculture 2023年第5期22卷 1590-1602页

作者： XIE Si-han WANG Zhao-jun HE Zhi-yong ZENG Mao-mao QIN Fang Benu ADHIKARI CHEN Jie State Key Laboratory of Food Science and Technology Jiangnan UniversityWuxi 214122P.R.China Collaborative Innovation Center of Food Safety and Quality Control Jiangnan UniversityWuxi 214122P.R.China Analysis Centre Jiangnan UniversityWuxi 214122P.R.China School of Science RMIT UniversityMelbourneVIC 3083Australia

This study aimed to investigate the interaction between maltodextrin/starch of different molecular weight distributions and soy protein isolate (SPI)–wheat gluten (WG) matrix during high-moisture extrusion.Two maltodextrins (dextrose equivalent (DE):10 and 20) and wheat starch were extruded with SPI–WG blend in a system of 65,70,and 75%moisture to investigate their effects on texture and thermal stability.Incorporating 5%maltodextrin (DE10) in the SPI–WG matrix improved the fiber structure and thermal stability.When wheat starch was thoroughly gelatinized during subsequent sterilization,the fiber structure and thermal stability were also improved.It was found that the plasticization caused by small-molecular weight saccharides and enhanced phase separation caused by large-molecular weight saccharides changed the melting temperature of blends and significantly improved the texture and thermal stability of extrudates.

关键词： high-moisture extrusion protein saccharide fiber structure textural properties rheology plasticization phase separation

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Novel Poly(methyl methacrylate)-based Ionomers Used as Multifunctional Aids to Modify Poly(vinyl chloride)

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Chinese Journal of Polymer Science 2016年第4期34卷 483-490页

作者： Li-na Zhang 宋义虎郑强 Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Zhejiang University Hangzhou 310027 China

Poly（methyl methacrylate）（PMMA） based ionomers with different lanthanum （La（III）） contents （PMMA-XLa） synthesized by free radical solution polymerization were applied to poly（vinyl chloride）（PVC） resins as a kind of multifunctional aids, and their performances were evaluated by measuring the static stability time, initial discoloration, transparency, fusion behavior and tensile strength of the modified PVC. The ionomers with proper lanthanum （La（III）） contents show a better thermal stability efficiency in comparison with traditional stabilizer lanthanum stearate. Meantime, they can accelerate PVC plasticization more efficiently than PMMA. The rigid PVC products stabilized with the ionomers present good transparency and enhanced tensile strength.

关键词： Rigid PVC Ionomers Thermal stability plasticization Multifunction.

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Microcellular Foaming of Plasticized Thin PC Sheet I.Effects of Processing Conditions

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Journal of Wuhan University of Technology(Materials Science) 2013年第2期28卷 235-242页

作者：陈浩管蓉 ZHAO Jingzuo JIANG Shufang KE Zhao ZHA Shangwen Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules College of Chemistry and Chemical Engineering Hubei University

Novel microcellular foams using thin plasticized PC sheet were prepared by compression molding. The measurement results showed that T of plasticized PC was decreased and the molecular chain mobility was increased. Decrease in T and increase in chains mobility were contributed to the widen of foaming temperature window. Effects of processing conditions on cell size, cell density and relative density were also investigated. The experimental results show that the temperature, tributyl citrate and foaming agent content have more effects on the structures and morphology of the plasticized PC microcellular foam. Effects of experimental conditions on cell size distribution have also been discussed.

关键词： plasticization microcellular foam polycarbonate compression molding

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Investigation on the foaming behaviors of NC-based gun propellants

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Defence Technology（防务技术） 2014年第3期10卷 261-268页

作者： Yu-xiang LI Wei-tao YANG San-jiu YING School of Chemical Engineering Nanjing University of Science and Technology

To prepare the porous NC-based(nitrocellulose-based) gun propellants,the batch foaming process of using supercritical CO_2 as the physical blowing agent is used.The solubilities of CO_2 in the single-base propellants and TEGDN(trimethyleneglycol dinitrate) propellants are measured by the gravimetric method,and SEM(scanning electron microscope) is used to observe the morphology of foamed propellants.The result shows that a large amount of CO_2 could be dissolved in NC-based propellants.The experimental results also reveal that the energetic plasticizer TEGDN exerts an important influence on the pore structure.The triaxial tensile failure mechanism for solid-state nucleation is used to explain the nucleation of NC-based propellants in the sol id state.Since some specific foaming behaviors of NC-based propellants can not be explained by the failure mechanism,a solid-state nucleation mechanism which revises the triaxial tensile failure mechanism is proposed and discussed.

关键词： Solid-state foaming plasticization Foamed propellant Nucleation Pore growth Tensile failure mechanism

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A CONDENSED REVIEW ON THE FABRICATION OF HOLLOW FIBER MEMBRANES FOR GAS SEPARATION:HISTORICAL DEVELOPMENT AND TECHNOLOGY CHALLENGES AHEAD

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化工学报 2000年第S1期51卷 1-4页

作者： Chung Tai-Shung (Institute of Materials Research & Engineering 3 Research Link, Singapore, 117602)

A review on the polymeric hollow fibers membranes for gas separation has been conducted. In order to deyelop high performance membranes for gas separation, there are a few technology challenges awaiting the chemical engineers to overcome. There are four major challenges, namely: 1) material selection and synthesis; 2) fabrication of hollow fiber membranes with an ultra- thin dense selective layer; 3) materials against plasticization; and 4) aging. In each area, we summarize the scientific accomplishments and technical difficulties.

关键词： hollow fiber membranes characterization plasticization aging gas separation

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A Methodological Outlook on Bioplastics from Renewable Resources

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Open Journal of Polymer Chemistry 2020年第2期10卷 21-47页

作者： Jomin Thomas Department of Polymer Engineering University of Akron Akron Ohio USA

Bio plastics products have a rapid growing demand and market across the globe. Polymers synthesized from renewable resources have gained immense popularity, in numerous applications ranging from films, bottles, food packaging, drug delivery, bags to agriculture mulch films. Various naturally occurring resources available for starch and PLA extraction and the associated polymer processing techniques are discussed. Alongside some basic concepts on blown film extrusion, the modifications needed for such specialized polymer processing techniques are also explored, giving a comprehensive outlook on bioplastics. Special process analysis, for its application as films are discussed. In the current scenario, as the world aspires for environmental and polymer sustainability, Bioplastic products are of high value. The review article would be beneficial to those embarked on designing bio-plastics products from renewable resources.

关键词： Thermoplastic Starch Polylactic Acid PLA Extrusion Blown Film Extrusion Gelatinization plasticization Bioplastics Polymer Sustainability

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