项目名称: 环氧化石墨烯/碳纤维增强树脂基复合材料的界面构筑及增强、增韧机理研究
项目编号: No.51303193
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 一般工业技术
项目作者: 张笑晴
作者单位: 广东工业大学
项目金额: 25万元
中文摘要: 针对现有碳纤维表界面改性中存在的提高复合材料界面强度却牺牲其界面韧性的问题,本项目提出采用化学方法将大比表面积的二维结构环氧化石墨烯接枝到"活性"碳纤维表面,即先在碳纤维表面预接枝稳定、可控,且富含氨基的聚膦腈,环氧化石墨烯再与聚膦腈表面氨基反应而接枝于碳纤维表面,构筑具有三维结构的环氧化石墨烯接枝的碳纤维多尺度增强体。通过环氧化石墨烯调控碳纤维复合材料的界面相互作用和界面微观结构,以引入新的能量耗散机制,实现全面提高复合材料的界面强度和韧性。主要研究内容:(1) 影响碳纤维表面环氧化石墨烯接枝密度、分布,形貌结构的规律;(2)环氧化石墨烯接枝碳纤维的表面结构和性质与复合材料界面性能之间的构效关系;(3)探明新界面相调控复合材料界面性能的作用机制,揭示界面增强、增韧机理。本项目的研究,将推动纤维表面改性技术和复合材料界面理论的发展,指导设计和制备高性能碳纤维增强树脂基复合材料。
中文关键词: 碳纤维复合材料;石墨烯;界面性能;聚膦腈;
英文摘要: Carbon fiber (CF) surface treatments can significantly improve interfacial adhesion strength while usually reduce the toughness of composites. In this study, we propose a novel method to graft epoxy functionalized graphene oxide (EP-GO) onto polyphosphazene functionalized carbon fibers through chemical reaction to form the EP-GOs grafted CF hierachial reinforcement. Herein, the controllable polymerization of polyphosphazene can introduce a stable and uniform distribution of numerous amino groups onto CF, which provide carbon fiber with "high reactivity" and will easily react with sufficient epoxy groups on EP-GOs. And then the EP-GOs grafted CFs can react with curing agent to interlink matrix through a great quantity of chemical bonding. In addition, the higher aspect ratio and the planar geometry of EP-GOs in the interface of composites will enhance the mechanical interlocking and give rise to crack deflection. The aim of the study is to achieve the optimal interfacial strength and toughness of carbon fiber reinforced composites due to the appropriate stress transfer and the enhanced energy absorption by changing the interface interaction between fiber and matrix and the morphologies of EP-GOs in the interface. The research work mainly focuses on: (1) to regulate and control the grafting density, distribution a
英文关键词: carbon fiber composites;graphene;interfacial properties;polyphosphazene;