硅树脂超疏水涂层的制备及湿闪特性研究  

Preparation and wet flashover characteristics of silicone superhydrophobic coating

作　　者：苏凡云 黄正勇 张樱凡 林骏坪 魏远 SU Fanyun;HUANG Zhengyong;ZHANG Yingfan;LIN Junping;WEI Yuan(College of Electrical Engineering,Chongqing University,Chongqing 400030,China;Northwest Electric Power Design Institute,Xi′an 710075,China)

机构地区：[1]重庆大学电气工程学院,重庆400030 [2]西北电力设计院,陕西西安710075

出　　处：《绝缘材料》2023年第5期49-54,共6页Insulating Materials

基　　金：国网电网公司智能电网联合基金项目(U1866603)。

摘　　要：水滴在疏水涂层表面由于电场的存在易发生电晕放电,严重时会进一步发展为沿面闪络。为提高涂层的湿闪电压,通过纳米二氧化硅改性甲基硅树脂制备了超疏水涂层,测试了涂层的附着力及耐磨性能,然后对不同类型的涂层进行闪络电压测试并观察沿面闪络现象。结果表明:超疏水涂层的附着力等级达到0级,磨损后涂层依旧保持良好的疏水性,静态接触角大于155°,涂层的湿闪电压达到26.2 kV,与室温硫化硅橡胶涂层相比提高了42.4%。超疏水性有利于涂层表面水滴在电场作用下运动产生干区,因此超疏水涂层在湿润环境下依旧具有良好的绝缘性能。Due to the presence of electric field,water droplets on the surface of hydrophobic coating are prone to generate corona discharge,which will further develop into surface flashover in severe cases.In order to improve the wet flashover voltage of coating,a superhydrophobic coating was prepared by nano-silica modified methyl silicone resin,the adhesion and wear resistance of the coating were tested,and then the flashover voltages of different types of coatings were measured and the surface flashover phenomena were observed.The results show that the adhesion of the superhydrophobic coatings reaches level 0.The coatings still maintain good superhydrophobicity after mechanical wear,and the static contact angle is greater than 155°.The wet flashover voltage of the coating reaches 26.2 kV,which is 42.4% higher than that of the RTV silicone rubber coating.The superhydrophobicity is conducive to the movement of water droplets on coating surface under electric field to create a dry area,therefore the superhydrophobic coating still has good insulating properties in wet environment.

关 键 词：超疏水涂层 甲基硅树脂 湿闪电压 耐磨性能 

分 类 号：TM215[一般工业技术—材料科学与工程]