电工技术学报  2019, Vol. 34 Issue (zk1): 433-439    DOI: 10.19595/j.cnki.1000-6753.tces.L80700
高电压与绝缘 |
等离子体作用后硅橡胶憎水性恢复及憎水迁移特性研究
肖雄, 王建国, 吴照国, 童瑶, 谢思洋, 宋师男
武汉大学电气工程学院 武汉 430072
Study on Hydrophobicity Recovery and Hydrophobicity Transfer of Plasma Treated Silicone Rubber
Xiao Xiong, Wang Jianguo, Wu Zhaoguo, Tong Yao, Xie Siyang, Song Shinan
School of Electrical Engineering Wuhan University Wuhan 430072 China
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摘要 为研究等离子体对复合绝缘子硅橡胶憎水性的影响,采用低温氩气等离子体分别对表面洁净硅橡胶和表面染污硅橡胶进行处理,测试样品憎水性恢复以及憎水性迁移过程中的静态接触角变化情况,同时用扫描电子显微镜(SEM)观测硅橡胶经等离子体处理后以及涂覆人工污秽时的表面形貌。实验结果表明,随着等离子体处理时间的增加,硅橡胶憎水性恢复速率逐渐增大,恢复稳定时的憎水角小于未处理样品。等离子体对硅橡胶的憎水性迁移有明显的促进作用,染污样品经等离子体处理后的憎水角迁移至稳定时的值比未处理样品大20°~40°。等离子体作用下硅橡胶表面产生孔洞和裂纹,而污秽层呈现出疏松多孔的特点,二者均有利于内部小分子迁移至表层,这是等离子体能促进硅橡胶憎水性迁移的主要原因。
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肖雄
王建国
吴照国
童瑶
谢思洋
宋师男
关键词 硅橡胶等离子体憎水性恢复憎水性迁移扫描电子显微镜    
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.
Key wordsSilicone rubber    plasma    hydrophobicity recovery    hydrophobicity transfer    scanning electron microscope (SEM)   
收稿日期: 2018-07-04      出版日期: 2019-07-29
PACS: TM855  
基金资助:国家自然科学基金资助项目(51207029)
通讯作者: 安群涛,男,1984年生,博士,副教授,研究方向为交流电机控制、新能源中的电力电子技术。E-mail:anquntao@hit.edu.cn   
作者简介: 肖雄,男,1994年生,硕士研究生,研究方向为高电压绝缘技术。E-mail:eexiaoxiong@whu.edu.cn
引用本文:   
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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