低成本铜-石墨烯复合导电胶的性能研究  

Study on the Properties of Low-cost Copper-graphene Composite Conductive Adhesive

作　　者：刘佳娜 王鹏飞 刘威 杨润田 周虎 童晓峰 范国栋 黄立志 Liu Jiana;Wang Pengfei;Liu Wei;Yang Runtian;Zhou Hu;Tong Xiaofeng;Fan Guodong;Huang Lizhi(Zhuzhou Feilu High-tech Materials Co.,Ltd.,Zhuzhou,Hunan 412000,China;Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;College of Physical Science and Technology,Xiamen University,Xiamen,Fujian 361000,China)

机构地区：[1]株洲飞鹿高新材料技术股份有限公司,湖南株洲412000 [2]中国科学院山西煤炭化学研究所,太原030001 [3]厦门大学物理科学与技术学院,福建厦门361000

出　　处：《涂料工业》2022年第8期50-55,共6页Paint & Coatings Industry

基　　金：湖南省创新创业技术投资项目(2018GK5022)。

摘　　要：本文以环氧树脂和超支化环氧树脂共混物作为基体,低相对分子质量改性聚酰胺作为固化剂,树枝状和球状混合铜粉为主要导电填料,石墨烯作为填充导电填料,制备出导电性、粘接性、耐老化性优异的导电胶。研究结果表明:超支化树脂质量分数30%,环氧基和活泼氢物质的量比为1,添加70%铜粉(其中树枝状铜粉质量分数为70%),添加0.5%石墨烯,导电胶的粘接强度最大(13.5 MPa)、体积电阻率最低(1.88×10^(-4)Ω·cm)。在恒定温度85℃、相对湿度85%环境老化1000 h后,导电胶的导电性能及附着力降低均在10%以内,稳定性较好。综合来看,石墨烯的加入不仅优化了铜导电胶的性能,还极大优化了导电胶的表面效果。The conductive adhesive with excellent conductivity,adhesion and aging resistance was prepared in this research by using epoxy resins and hyperbranched resins as matrix,low molecular weight modified polyamide as curing agent,dendritic and spherical mixed copper powder as the main conductive filler,and graphene as the conductive filler.The results showed that when the mass fraction of hyperbranched resin was 30%,the ratio of epoxy equivalent to active hydrogen equivalent was 1,the addition of dendritic copper powder and graphene was 70% and 0.5%,the adhesion force of the conductive adhesive was the optimal(13.5 MPa)and the volume resistivity was the lowest(1.88 MPa×10^(-4)Ω·cm).After aging for 1000 h at a constant temperature of 85℃ and humidity of 85% aging environment,the conductivity and adhesion properties of the prepared conductive adhesive decreased within 10%,which showed good stability.In general,the addition of graphene not only optimized the performance of the copper conductive adhesive,but also greatly beautified the surface effect of the conductive adhesive.

关 键 词：导电胶 环氧树脂 超支化树脂 球形铜粉 树枝状铜粉 石墨烯 

分 类 号：TQ637.1[化学工程—精细化工]