超疏水硅橡胶表面的自清洁特性  

Self-cleaning Properties of Super-hydrophobic Silicone Rubber Surface

作　　者：金海云[1] 周慧敏 卫世超 邱漫诗 匡国文 高乃奎[1] JIN Haiyun;ZHOU Huimin;WEI Shichao;QIU Manshi;KUANG Guowen;GAO Naikui(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《绝缘材料》2020年第11期82-88,共7页Insulating Materials

摘　　要：超疏水表面具有自清洁特性,在电力设备外绝缘领域应用前景良好。首先制备了超疏水硅橡胶表面和普通疏水硅橡胶表面,设计并进行了加电和不加电情况下的自清洁试验,观测表面的自清洁效果和沿面闪络电压,并对污秽情况下水滴在超疏水表面的动态行为和受力机理进行了探究。结果表明:制备的超疏水表面自清洁性能优异,在交流电作用下,三相接触点的场强畸变导致水滴和硅藻土颗粒带电,水滴会吸附周围的硅藻土颗粒并振动、滚动,同时水滴所受的电场力和摩擦阻力会被影响,进而影响滚动行为和表面状态。相较于普通疏水硅橡胶,超疏水硅橡胶表面闪络电压更高,水平和倾斜放置时,初始闪络电压分别最多可提高24.1%和34.0%,2次闪络电压分别最多可提高60.2%和129.2%。The super-hydrophobic material surface has self-cleaning properties,which has good application prospect in external insulation field of power equipment.The super-hydrophobic and normal hydrophobic silicone rubber surface were prepared,and self-cleaning tests with and without AC electric field were designed and carried out.The self-cleaning effect and surface flashover voltages were observed,and the dynamic behavior and force mechanism of the water droplet on the super-hydrophobic surface were investigated under polluted conditions.The results show that the prepared super-hydrophobic surface has excellent self-cleaning properties.Under AC electric field,the field strength distortion at the three-phase junction leads to the water droplet and diatomite particles charged,then the water droplet absorbs the diatomite particles around it and vibrates and rolls,at the same time,the electric field force and friction resistance applied on water droplets are affected,and further affects its rolling behavior and surface condition.The surface flashover voltage of the super-hydrophobic silicone rubber surface is higher than that of the normal hydrophobic silicone rubber.When the super-hydrophobic silicone rubber is placed horizontally and tilted,the initial flashover voltage can increase by up to 24.1%and 34.0%,and the second flashover voltage can increase by up to 60.2%and 129.2%,respectively.

关 键 词：超疏水 硅橡胶 表面制备 自清洁 闪络电压 

分 类 号：TM215.2[一般工业技术—材料科学与工程]