退役硅橡胶复合绝缘子的合理处置是电力行业需要解决的重要问题。利用硅烷偶联剂表面处理退役硅橡胶绝缘子胶粉，再将其填充室温硫化硅橡胶。利用红外光谱和热失重（TGA）分析表面处理效果，利用万能材料试验机、TGA、动态力学热分析和扫描电镜对硫化胶性能和结构进行分析。结果表明，硅烷偶联剂可有效地对退役硅橡胶复合绝缘子胶粉进行表面改性，其中乙烯基三乙氧基硅烷是较佳的偶联剂；在5~35份改性胶粉用量范围内，所得硫化胶拉伸强度提高7%~23%；填充处理胶粉不影响硫化胶的玻璃化转变温度（-27~-23℃），提高了硫化胶最大热分解速率温度（最高达到532℃）和模量（30℃模量提高7%~85%），且在基体内分散均匀。因此，退役硅橡胶复合绝缘子胶粉作为室温硫化硅橡胶的填充材料是实现其回收再利用的有效途径。

It is an important issue for the power industry to deal retionaly with a large number of spent silicone rubber composite insulators.In this paper,the surface of silicone rubber composite insulator powder is treated by silane coupling agent.The treated powder as a filling material is compounded with room temperature vulcanized silicone rubber (RTV).The effect of surface treatment is analyzed by infrared spectroscopy and thermal weight loss (TGA),and the properties and structures of the modified RTV are analyzed by universal material test machine,TGA,dynamic mechanical thermal analysis and scanning electron microscope.The experimental results show that silane coupling agents can perform effectively surface modification to silicone rubber composite insulator powder and vinyl triethoxysilane is a preferred silane coupling agent.The tensile strength of modified RTV is improved by 7%-23% when the adding amount of treated powder is in the range of 5%-35%.The glass transition temperature of the modified RTV remained unchanged in the range of -27℃ and -23℃,which is not affected by the powder.The temperature for maximum thermal decomposition rate of the modified RTV is increased to 532℃ and the modulus at 30℃ is increased by 7%-85%.The treated powder disperses evenly in the RTV matrix.Therefore,usinge spent silicone rubber composite insulator powder as filler for RTV is an effective way to recycle.

曹宏伟(1980-),男,博士,研究方向为有机硅及其复合材料,caoek@163.com