镍包石墨/环氧树脂复合材料的导电特性  

Conductive Properties of Nickel Coated Graphite/Epoxy Resin Composites

作　　者：张帆[1] 王学林 张荣[1] 徐成成[1] 余东 刘清亭[1] 付旭东 黄志雄 胡圣飞[1] Fan Zhang;Xuelin Wang;Rong Zhang;Chengcheng Xu;Dong Yu;Qingting Liu;Xudong Fu;Zhixiong Huang;Shengfei Hu(Hubei Provincial Key Laboratory of Green Materials for Light Industry,Hubei University of Technology, Wuhan 430068,China;Hubei Jhike Environmental Protection Technology Co. 9 Ltd. 9 Jingzhou 434000, China)

机构地区：[1]湖北工业大学绿色轻工材料湖北省重点实验室,湖北武汉430068 [2]湖北金科技环保科技股份有限公司,湖北荆州434000

出　　处：《高分子材料科学与工程》2019年第3期91-95,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(31270610);湖北省科技支撑计划(2015BAA094)

摘　　要：为了提高镍包石墨(NCG)/环氧树脂(EP)复合材料的导电性能,一方面通过乙二胺改性NCG,另一方面将改性后的NCG与EP共混进行预处理,制备导电复合材料。文中研究了改性后预处理过程对复合材料导电性能的影响,并进一步分析了导电网络形成的原因。研究表明,100℃/10 h预处理后,体系黏度增大,表现出明显的非牛顿流体行为;固化放热峰温度向低温移动,热焓变大并且复合材料的导电性能得到提高。当填料含量为30%时,处理后体系的体积电阻率降低了1个数量级。分析认为,预处理过程能有效改善填料在基体中的沉降现象,充分发挥了乙二胺的改性效果,有利于导电网络的构建。In order to improve the electrical conductivity of nickel-coated graphite (NCG)/epoxy resin (EP) composites, on the one hand, the NCG is modified by ethylenediamine, and on the other hand, the modified NCG and EP are blended for pretreatment to prepare conductive composite materials. The influence of the pre-treatment process on the conductivity of composites was studied, and reasons for the formation of conductive networks were further analyzed. The results show that after a 100 ℃/10 h pretreatment process, the viscosity of the system increases, showing obvious non-Newtonian fluid behavior;the temperature of the solidification exothermic peak shifts to a low temperature, the thermal enthalpy becomes larger and the conductivity of the composite is improved. When the filler content is 30%, the volume resistivity of the treated system is reduced by an order of magnitude, indicating that the pretreatment process can effectively improve the sedimentation phenomenon of fillers in the matrix, and fully exert the effect of ethylene diamine modification, which is conductive to the construction of conductive networks.

关 键 词：镍包石墨 乙二胺 环氧树脂 沉降 导电性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]