镀银玻璃微珠/硅橡胶导电复合材料导电性能的影响因素

Influential factors on the electrical conductivity of silver-coated glass bead/silicone rubber electrically conductive composite

研究镀银玻璃微珠的用量、粒径、表面改性工艺以及导电硅橡胶硫化程度等对镀银玻璃微珠/硅橡胶复合材料导电性能的影响。结果表明,镀银玻璃微珠的粒径越大,复合材料的导电性能越好;湿法预处理和原位改性-分散工艺制得复合材料的导电性能和导电稳定性优于直接干混工艺;导电硅橡胶硫化程度的提高有利于提高材料的导电性能;Payne效应的大小与导电硅橡胶的体积电阻率有很强的相关性。

The effects of the addition level, particle size and modification technology of silver-coated glass bead and the curing degree of electrically conductive silicone rubber on the electrical conductivity of silver-coated glass bead/silicone rubber composite were investigated. The results showed that the electrical conductivity of the composite was improved as the particle size of silver-coated glass bead increased;the electrical conductivity and its stability of composite prepared with wet pretreatment or insitu modification-dispersion were better than those of composite prepared with direct dry-mixing;the electrical conductivity of composite was improved as the curing degree of electrically conductive silicone rubber increased;the Payne effect was highly related to the volume resistivity of electrically conductive silicone rubber.