硅橡胶基高导电复合材料的制备及其性能研究  

Preparation and Properties of High Conductive Composites Based on Silicone Rubber

作　　者：虞东霖 邹华[1] 宁南英[1] YU Donglin;ZOU Hua;NING Nanying(Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029

出　　处：《橡胶工业》2023年第7期483-489,共7页China Rubber Industry

基　　金：国家重大基础研究项目。

摘　　要：以导电炭黑、片状微米银、碳纳米管为填料制备甲基乙烯基硅橡胶(MVQ)基高导电复合材料并研究其性能。结果表明:导电炭黑在MVQ中的逾渗阈值为8~12份(对应体积分数为3.33%~4.92%),导电炭黑用量为12份时导电炭黑/MVQ复合材料的交联网络最稳定;在添加12份导电炭黑的基础上添加150份片状微米银时,导电炭黑/片状微米银/MVQ复合材料在50%应变下的导电网络恢复程度最大;导电炭黑/片状微米银/碳纳米管/MVQ复合材料在50%应变下的电导率为1.2×10^(4)S·m^(-1),电导率变化率为18%。High conductive composites based on methyl vinyl silicone rubber(MVQ)were prepared using conductive carbon black,flake micron silver and carbon nanotube as fillers,and their properties were studied.The results showed that the percolation threshold of conductive carbon black in MVQ was 8~12 phr(3.33%~4.92%of volume fraction).When the dosage of conductive carbon black was 12 phr,the crosslinking network of conductive carbon black/MVQ composite was the most stable.When adding 150 phr flake micron silver on the basis of 12 phr conductive carbon black,the conductive network recovery of conductive carbon black/flake micron silver/MVQ composite at 50%strain was the largest.At 50%strain,the conductivity of conductive carbon black/flake micron silver/carbon nanotube/MVQ composite was 1.2×10^(4) S·m^(-1),and the conductivity change rate was 18%.

关 键 词：甲基乙烯基硅橡胶 导电复合材料 导电炭黑 片状微米银 碳纳米管 电导率 

分 类 号：TQ333.93[化学工程—橡胶工业]