炭黑/铜粉填充导电硅橡胶的研究

Study on the electrically conductive silicone rubber filled with carbon black and copper powder

导电橡胶具有良好的导电性能和柔韧性.以炭黑和铜粉为导电填料,以107号室温硫化硅橡胶为基体,制备出了导电硅橡胶.研究了不同配比的炭黑与铜粉对导电硅橡胶导电性能和压阻特性的影响.结果表明:随着填料的不断增加,导电橡胶的电阻呈下降趋势.当铜粉选30份、炭黑选40份时,导电硅橡胶的导电性能最好;当铜粉含量一定时,添加30%或34%炭黑的试样既具有较好的导电性能,又具有较宽的压阻范围.

Conductive composite has excellent conductivity and flexibility.In this paper,conductive silicone rubber were prepared at room temperature with vulcanizing rubber（RTV）as matrix and carbon black/copper powder as conductive filler.The effects of different proportion of carbon black and copper powder on the electrical properties and piezoresistance character of conductive silicone rubber were investigated.The results show that as the amount of filler increasing,the resistivity of the conductive silicone rubber tends to decrease.The conductive silicone rubber has a best conductivity when 30 copies of copper powder and 40 copies of carbon black is introduced.Remaining the content of copper powder,the sample has good electrical conductivity and wide range of pressure resistance when the doses of carbon black is30% or 34%.