Abstract：In order to study the effect of plasma on hydrophobicity of silicone rubber used for composite insulators, low temperature Ar plasma was applied on the surfaces of clean silicone rubber and contaminated silicone rubber respectively. The changes of static contact angle were measured in the process of hydrophobicity recovery and hydrophobicity transfer. Additionally, scanning electron microscope (SEM) test was conducted to observe the surface morphology of the silicone rubber after being treated by plasma and coated with artificial pollution. The experimental results show that the hydrophobicity recovery speed of silicone rubber increases gradually with the increase of plasma treatment duration, and the final hydrophobicity contact angle is smaller than that of the untreated sample when it returns to stability. Obviously, plasma treatment is able to promote the hydrophobicity transfer process. After plasma treatment the hydrophobicity contact angle of the contaminated silicone rubber is 20°~40° larger than that of the untreated sample when it becomes stable. The surface of plasma-treated silicone rubber appears to be with voids and cracks while the pollution layer is loose and porous. They are all beneficial for the transfer of inner low molecular weight (LMW). And these factors are the main reason why plasma treatment can promote the hydrophobicity transfer of silicone rubber.
肖雄, 王建国, 吴照国, 童瑶, 谢思洋, 宋师男. 等离子体作用后硅橡胶憎水性恢复及憎水迁移特性研究[J]. 电工技术学报, 2019, 34(zk1): 433-439.
Xiao Xiong, Wang Jianguo, Wu Zhaoguo, Tong Yao, Xie Siyang, Song Shinan. Study on Hydrophobicity Recovery and Hydrophobicity Transfer of Plasma Treated Silicone Rubber. Transactions of China Electrotechnical Society, 2019, 34(zk1): 433-439.
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2019, Vol. 34 
