碳纤维表面重氮化接枝氧化石墨烯用于碳/环氧界面增强

项目名称： 碳纤维表面重氮化接枝氧化石墨烯用于碳/环氧界面增强

项目编号： No.U1362107

项目类型： 联合基金项目

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 吴刚平

作者单位： 中国科学院山西煤炭化学研究所

项目金额： 60万元

中文摘要： 聚丙烯腈基碳纤维的表面呈惰性，与环氧树脂间的界面粘合力弱。最近的文献报道和我们的初步研究结果显示：碳纤维表面涂覆氧化石墨烯可显著改善碳纤维与树脂基体间的界面粘合性能。然而，氧化石墨烯与碳纤维之间较弱的物理结合力导致界面粘合性能难以显著提高。本项目设计通过重氮化反应将氧化石墨烯通过共价键偶合接枝在碳纤维表面，探讨碳纤维表面的重氮化修饰机理；阐明氧化石墨烯在碳纤维表面的自组装机理；明确重氮化接枝对氧化石墨烯沉积结构、形貌的影响机制；在此基础上探讨氧化石墨烯对碳纤维/环氧树脂界面粘合性能的作用机制。本项目的创新点在于发展一种无损碳纤维力学性能、氧化石墨烯与碳纤维之间牢固结合且可工业化的新型复合增强体，为解决我国碳纤维“用得好”的问题提供新工艺和新材料。

中文关键词： 碳纤维；环氧树脂；界面粘合性；重氮化接枝；复合材料

英文摘要： The interfacial adhesion between carbon fibers and epoxy resin is pretty poor due to the inert nature of carbon fiber surfaces. The recent literatures and our preliminary research results show that the coating of grapheme oxide (GO) onto carbon fiber surfaces will be able to significantly improve the interfacial bonding properties. However, the poor physical interactions between the carbon fibers and the coated GO sheets limits the strengthening extent of the interfacial adhesion. This proposal aims to covalently graft GO sheets onto carbon fiber surfaces by diazo-reactions. This proposal is explore the mechanism of diazo-functionalization of carbon fiber surfaces, to realize the electric-field induced self-assembly of GO sheets onto carbon fibers, and to clarify the factors that affect the grafting structures and morphology of GO sheets on carbon fiber surface; and also, the effect of the grafting of GO sheets on interfacial bonding between fibers and epoxy resin will also be discussed. The innovation of this work is to develop a no-losing tensile strength of carbon fibers, covalent bonding between GO and carbon fibers, and potentially industrialble methods for preparation of GO/carbon fiber hybrids. This study is expected to help solving the problem of “how to make better use of domestic carbon fibers” in Chi

英文关键词： Carbon fibers；Epoxy resin；Interfacial adhesion；Diazonium grafting；Composites