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采用化学镀制备了玻纤/银核壳结构复合粒子,研究了玻纤粗化工艺、玻纤/AgNO3质量比、PdCl2质量浓度和NH3·H2O体积分数对复合粒子表观形貌以及导电性能的影响,并以该复合粒子为填料、硅橡胶为基体制备了导电橡胶。结果表明:粗化工艺增大了玻纤表面粗糙度,提高了玻纤表面的电负性,有利于后续化学镀银。复合粒子的体积电阻率(ρV)随着玻纤/AgNO3质量比的降低或PdCl2用量的增大而降低,随着NH3·H2O用量的增大而先降低后升高。最佳工艺参数为:玻纤/AgNO3质量比4:1,PdCl20.1g/L,NH3·H2O60mL/L。当复合粒子添加量为硅橡胶质量的3倍时,导电橡胶的ρV降至0.006Ω·cm,导电性能优异。
The glass fiber / silver core-shell composite particles were prepared by electroless plating. The effects of glass fiber roughening process, glass fiber / AgNO3 mass ratio, PdCl2 mass concentration and NH3 · H2O volume fraction on the morphology and electrical conductivity Influence, and the composite particles as a filler, silicone rubber as a matrix prepared conductive rubber. The results show that the roughening process increases the surface roughness of the glass fiber, increases the electronegativity of the glass fiber surface, and is favorable for the subsequent electroless silver plating. The volume resistivity (ρV) of composite particles decreases with the decrease of mass ratio of glass fiber / AgNO3 or the amount of PdCl2, and then decreases with the increase of NH3 · H2O dosage and then increases. The best technological parameters are: glass fiber / AgNO3 mass ratio 4: 1, PdCl20.1g / L, NH3 · H2O60mL / L. When the amount of composite particles is 3 times the mass of silicone rubber, the ρV of the conductive rubber is reduced to 0.006Ω · cm, and the conductive properties are excellent.