碳纤维填充对导电硅橡胶压阻效应及电阻蠕变行为的影响  

The Effect of Filled Carbon Fiber on the Piezoresistive Property and Resistance Creep Behavior of Conductive Silicon Rubber

作　　者：左哲伟 夏志东[1] 聂京凯[1,2] 黄培[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]国网智能电网研究院电工新材料及微电子研究所,北京102211

出　　处：《材料导报（纳米与新材料专辑）》2016年第2期440-443,447,共5页

基　　金：企业横向资助项目(SGRI-WD-71-14-013)

摘　　要：将导电粒子添加到绝缘硅橡胶中制备出具有压阻效应的导电硅橡胶,它是一种新型压力传感器用材料。选用3种不同长度的碳纤维作为导电填料,高温硫化硅橡胶作为基体制备导电橡胶,同时在100μm长碳纤维填充导电橡胶中引入镍包铝球形粒子形成复合填料。分析了导电硅橡胶的渗流特性、压阻效应与电阻蠕变行为,发现纤维长度和纤维添加量对导电橡胶的压阻行为有显著影响:纤维长度增大,导电橡胶的渗流阈值变小;导电橡胶的压阻效应在渗流区间明显;球形镍包铝可以削弱导电橡胶的电阻蠕变程度。Conductive silicon rubber with piezoresistive property is a novel material for pressure sensor, which is manufactured by adding conducting particle into insulating rubber. This experiment selected carbon fiber （CF） in three different lengths as conductive fillers and high temperature vulcanized （HTV） silicone rubber as matrix to pre- pare conductive silicon rubber（CSR）, while nickel-coated aluminum particles were mixed into the CSR filled with CF in length of 100 μm to form composite filler. Percolation feature, piezoresistive property and resistance creep behavior of CSR were studied. The result exhibited the piezoresistive property of CSR was dependent upon the length and the content of fillers. Percolation threshold of CSR decreased with the increase of CF length. Meanwhile, piezoresistive effect of CSR was more significant at the range of percolation threshold. And spherical nickel-coated aluminum particle would weaken the resistance creep behavior of CSR.

关 键 词：导电硅橡胶 碳纤维 渗流特性 压阻效应 电阻蠕变 

分 类 号：TB34[一般工业技术—材料科学与工程]