二维类石墨烯材料/生物降解高分子纳米复合材料结晶行为及其性能调控

项目名称： 二维类石墨烯材料/生物降解高分子纳米复合材料结晶行为及其性能调控

项目编号： No.51473085

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 郭宝华

作者单位： 清华大学

项目金额： 85万元

中文摘要： 全生物降解高分子材料由于其环境友好的特点，已经成为目前国际的研究热点之一，但是其物理性能的不足极大地限制了其应用，因此对其聚集态结构调控和多维增强研究具有重要意义。类石墨烯二维片层材料不仅具有跟石墨烯一样极强的机械性能，还由于其组成与结构的变化而具有特殊的性能。并且这类二维材料具有不同的晶体结构、可控的几何尺寸和可修饰的表面官能团。因此利用这些特点，通过制备类石墨烯材料/可生物降解高分子纳米复合材料，我们能够研究二维材料的晶胞结构以及几何尺寸对于复合材料结晶行为的影响，并评估两者与成核效率的关系，从而为制备高效成核剂提供理论指导；在此基础上，利用高效成核作用，研究基体材料在其熔点附近温度段内的结晶和熔化行为，进一步研究低过冷度下聚合物结晶的机理；另外通过对类石墨烯材料进行官能团化，从微观尺度定量分析二维材料与基体之间的相互作用，最终达到调控可生物降解材料性能的目的。

中文关键词： 类石墨烯二维材料；环境友好；聚合物纳米复合材料；结晶行为；性能调控

英文摘要： Due to the characteristic of eco-friendly, biodegradable polymer has being studied widely in the international research field. However, the defects of physical properties restrict its application, thus it is important to regulate its aggregation structure and study its multi-dimensional strengthening effect. Graphene-like two-dimensional materials not only possess strong mechanical property like graphene, but also show unique properties due to its adjustable composition and structure. Utilizing the characteristic of different crystalline structure, controllable geometry size and surface functional group of two-dimensional material, through preparing graphene-like two-dimensional material/biodegradable polymer nanocomposites, we can study the relationship between crystalline structure/geometric dimension and nucleation efficiency. The effect of graphene-like materials on the crystallization behaviour of nanocomposties will also be studied. Those research could provide theoretical guidance for preparing highly efficient nucleating agent. By using such nucleation effect, the crystallization and melting behaviour of polymer matrix close to melting point could be investigated and the crysllization mechanism at low supercooling could be discussed further. In addition we can make quantitative analysis of the interaction between two-dimensional filler and matrix so as to tailor design the performance of nanocomposites.

英文关键词： graphene-like two-dimensional materials;eco-friendly;polymer nanocomposite;crystallization behaviour;property modulation