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首页> 外文期刊>Journal of Applied Polymer Science >Electrolytically Exfoliated Graphene-Polylactide-Based Bioplastic with High Elastic Performance
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Electrolytically Exfoliated Graphene-Polylactide-Based Bioplastic with High Elastic Performance

机译：具有高弹性的电解剥落石墨烯-聚乳酸基生物塑料

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摘要

This work reports an innovative way to prepare biopolymer composite by incorporating graphene (GP) synthesized from electrolytic exfoliation into biodegradable polymer blend (polylactide/epoxidized palm oil: PLA/EPO) based on melt-blending method and studies their physical properties for food packaging and related applications. Multilayer GP structure synthesized by electrolytic exfoliation is confirmed by transmission electron microscopy and Raman spectroscopy, whereas homogeneous GP incorporation in PLA/EPO is verified by scanning electron microscopy and X-ray diffraction. From thermogravimetric analysis and heat deformation temperature (HDT) studies, the decomposition and HDTs of PLA/EPO/GP composites are higher than those of PLA/EPO but are lower than those of pristine PLA and tend to decrease with increasing GP content because of thermal conductivity effect. From standard tensile test, loading of GP in PLA/EPO at an optimal concentration of 0.6 wt % results in higher elongation at break by as much as 52%. The observed additional elongation under a given tension and the corresponding lower tensile strength/Young's modulus may be attributed to lower binding force of materials in the composite because of the presence of relatively weak GP-PLA/EPO interfaces. Moreover, oxygen permeability is found to decrease with increasing GP contents and oxygen permeability is reduced by 40.33% at the GP loading concentration of 0.6 wt %. (C) 2014 Wiley Periodicals, Inc.
机译：这项工作报告了一种创新的方法，该方法通过基于熔融共混的方法将由电解剥离产生的石墨烯（GP）掺入可生物降解的聚合物共混物（聚丙交酯/环氧化棕榈油：PLA / EPO）中，从而制备生物聚合物复合材料，并研究其在食品包装和包装中的物理性能。相关应用程序。透射电镜和拉曼光谱证实了通过电解剥落合成的多层GP结构，而PLA / EPO中均匀的GP掺入则通过扫描电子显微镜和X射线衍射证实。从热重分析和热变形温度（HDT）研究来看，PLA / EPO / GP复合材料的分解和HDT高于PLA / EPO，但低于原始PLA的分解和HDT，并且由于热而随GP含量的增加而降低电导率效应。根据标准拉伸试验，在PLA / EPO中以0.6 wt％的最佳浓度加载GP会导致断裂伸长率提高多达52％。由于存在相对较弱的GP-PLA / EPO界面，在给定张力下观察到的附加伸长率和相应的较低的拉伸强度/杨氏模量可归因于复合材料中较低的粘合力。此外，发现氧渗透率随着GP含量的增加而降低，并且在0.6重量％的GP负载浓度下，氧渗透率降低了40.33％。 （C）2014威利期刊公司

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