聚苯胺/改性胶粉导电材料的制备及其性能研究

将废旧轮胎胶粉用硅烷偶联剂(KH-560)处理得到改性胶粉，然后以过硫酸铵为引发剂，采用化学原位聚合法制备了聚苯胺/改性胶粉导电材料。采用傅里叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)、能谱仪(EDS)、四探针测试仪及电化学工作站等仪器，研究了原料配比、反应温度、反应时间对聚苯胺/改性胶粉导电材料导电性能的影响，并分析了胶粉改性及复合材料导电机理。结果表明，通过改性能明显提高胶粉分散性能；当温度为10 ℃，过硫酸铵与苯胺摩尔比为1∶1，盐酸浓度为1.0 mol/L，反应时间10 h时，制得的聚苯胺/改性胶粉导电材料的电导率为4.79 S/cm。

Preparation and Properties of Conductive Polyaniline/Rubber Powders Blends

Modified rubber powder was prepared by treating waste tire rubber powder with silane coupling agent (KH 560). Polyaniline/ modified rubber powder conductive blends were prepared by in situ polymerization and using ammonium persulfate as initiator. The effect of the ratio of raw materials, the reaction temperature and time on the conductivity of the blends was studied by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), four-probe resistivity meter, and electrochemical workstation. It showed that the dispersion of rubber powders was significantly improved through modification. The conductivity of polyaniline/modified rubber powder conductive blends reached 4.79 S/cm under the conditions of the temperature of 10 ℃, the ratio of ammonium persulfate to aniline of 1∶1, the concentration of hydrochloric acid of 1.0 mol/L, and the reaction time of 10 h.