氧化石墨烯调控不相容共混物界面结构与性能的研究

项目名称： 氧化石墨烯调控不相容共混物界面结构与性能的研究

项目编号： No.51203129

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 有机高分子材料学科

项目作者： 杨静晖

作者单位： 西南交通大学

项目金额： 25万元

中文摘要： 不相容共混物界面作用弱，载荷作用下裂纹易于在界面引发与扩展，导致材料的力学失效，因此改善不相容共混物界面强度是制备高性能共混物的关键。本项目拟选用具有双亲性质的二维纳米材料-氧化石墨烯，通过氧化石墨烯与聚合物之间界面能的设计，结合热力学和动力学因素，将其引入不相容共混物界面，制备基于氧化石墨烯的新型纳米复合材料。利用高比表面积的氧化石墨烯与聚合物广泛的相互作用，使裂纹在界面的扩散受到抑制，从而实现界面增强。主要研究内容包括：1）影响氧化石墨烯在共混物两相界面分布的科学规律；2）氧化石墨烯在界面分布对不相容共混物结构演变的作用；3）界面分布的氧化石墨烯诱导形成的界面微观结构；4）通过对材料断裂力学行为的分析，建立界面分布的氧化石墨烯增强增韧不相容共混物的理论模型。通过本项目的研究，有助于建立并发展聚合物共混物增强增韧的新机理，拓展氧化石墨烯在聚合物材料领域的应用，具有重要的学术和实际意义。

中文关键词： 不相容共混物；氧化石墨烯；界面；力学性能；电学性能

英文摘要： Due to weak interfacial adhesions in immiscible polymer blends, crack initiation and propagation often occur at interface when load is applied, finally resulting in mechanical failure of materials. The key to fabricating polymer blends with excellent properties is to improve interfacial strength.This project aims to introduce amphiphilic,two-dimensional nanofiller - graphene oxides(GOs) into the interface of two components via tailoring the interfacial energies between GOs and polymers combined with thermodynamic driving forces and kinetic factors. And based on the extensive interplay between GOs and polymers arised from high specific area of GOs,interfacial enhancement can be realized through the crack growth inhibition obtained by GOs at the blend interface. Main research consists of:1) factors which influence the distribution of GOs at the blend interface, and migration mechanism of GOs in immiscible polymer blends; 2)effects of GOs at the blend interface on evolution and stability of immiscible blends morphologies; 3)interfacial microstructure induced by GOs at the blend interface; 4) theory model and mechanism of strengthening and toughening polymer blends resulted from GOs at the blend interface to be established on the basis of fracture mechanics analysis. After completing this project, it is expected to

英文关键词： Immiscible blend；graphene oxide；interface；mechanical property；electrical property