氧化石墨烯纳米增容聚乳酸/弹性体不相容共混物的界面构筑及增容机制

项目名称： 氧化石墨烯纳米增容聚乳酸/弹性体不相容共混物的界面构筑及增容机制

项目编号： No.51503117

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 赵丽芬

作者单位： 山东科技大学

项目金额： 20万元

中文摘要： 采用纳米材料对不相容共混体系进行纳米增容已成为近年来的研究热点，但针对新兴的石墨烯增容不相容共混体系，目前还缺乏有效手段控制纳米材料与基体的相互作用，因而限制了纳米增容效应的充分发挥。本研究针对不相容的弹性体增韧聚乳酸体系，通过调节氧化石墨烯与基体的化学与物理作用，强化聚乳酸/弹性体不相容共混物的界面，实现对聚乳酸弹性体共混体系的增容，提高聚乳酸材料的综合性能。采用与基体组分相同的大分子接枝氧化石墨烯，制备功能化的氧化石墨烯 (f-GO)，增强纳米材料与弹性基体间的化学作用。通过改变热力学与动力学条件，调控功能化氧化石墨烯的界面分布，研究聚乳酸的界面结晶行为，增进f-GO与聚乳酸的物理作用，实现化学作用与物理作用协同增强界面结合。通过分析纳米增容的共混体系的微观结构与宏观性能的关系规律，探讨界面增容的作用机制，为更大限度的发挥纳米增容的优势及制备高性能可降解聚乳酸材料奠定实验和理论基础。

中文关键词： 聚乳酸；生物降解高分子；纳米增容；共混；氧化石墨烯

英文摘要： Nanofiller compatibilization in immiscible blends has become a research focus in recent years. Since lacking effective way to control the interactions between nanometer materials and matrix, the power of nano compatibilizing was limited for the new nano materials of graphene. In this project, grapheme oxide will be used to modify the incompatible blends of elastomer toughening poly (lactic acid) (PLA). Functional graphene oxide (f-GO) by macromolecular will be prepared through chemical grafting method to increase the chemical role between nanomaterials and elastic matrix. By changing the kinetic and dynamic condition to control the interface distribution of f- GO. The PLA crystal morphology, crystallization kinetics and the crystal structure for composites with interface distributed by f-GO will be investigated to control the crystal structure and enhance the physical effects of poly (lactic acid) (PLA) and f-GO. The relationship between material structure and performance of composites of PLA/elastomer blends compatibilized by f-GO which has the enhanced interface by chemical and physical role will be studied. The research of this project will provide theoretical foundations to take advantage of GO to realize compatibly role and prepare PLA with high performance.

英文关键词： polylactide;biodegradable polymer; nanofiller compatibilization ;blend;graphene oxide