纳米 SiO 2对压力敏感导电橡胶静态特性和动态特性的影响

摘要

The conductive composite material was prepared by using carbon black (CB3100) as conductive phase and silicon rubber as matrix .Effect of nano‐SiO2 on static and dynamic characteristics of pressure‐sensitive con‐ductive rubber was studied .The results of static characteristics revealed that nano‐SiO2 doped in the proper scale had good modification to conductive rubber .It enhanced the conductivity of conductive rubber ,and short‐ened the relaxation time of the resistance .The addition of SiO2 improved linearity of the pressure‐resistance curve ,and advanced the temperature stability of conductive rubber .The results of dynamic characteristics showed that the addition of SiO2 made the resistance of conductive rubber under the step‐force went to stability faster ,but had no significant impact on the response time and the frequency response .Moreover ,addition of SiO2 also had negative impact ,such as increased the peak time of the step response time .%以炭黑（CB3100）作为导电相，硅橡胶为基质制备柔性触觉传感器用力敏导电复合材料。通过SiO2填料对导电橡胶的纳米改性，研究了纳米SiO2对导电橡胶静态特性和动态特性的影响。静态特性结果表明，适量纳米SiO2粒子对导电橡胶具有良好改性作用，增强了导电橡胶的导电性，缩短电阻弛豫时间，改善其压力‐电阻曲线的线性度，提高导电橡胶对温度的稳定性。动态特性结果表明，SiO2的加入能够缩短阶跃力作用下导电橡胶电阻达到稳定所需的时间，但对响应时间和频率响应无显著影响。此外，SiO2的加入也存在负面影响，如使得阶跃响应信号的峰值时间增长。