Effect of superhydrophobic surface on the surface trap distribution of silicone rubber composites

Abstract

In order to study the effect of superhydrophobic surface on the surface electrical properties of silicone rubber composite insulators, superhydrophobic sample and common sample were prepared. Their surface flashover voltage in high vacuum and their surface potential decay curve in air were measured. Analyzed their surface trap distribution characteristics. The experimental results indicate that changing the surface structure of silicone rubber composites will alter the distribution of surface traps. The energy level and density of deep traps in superhydrophobic sample are higher than those on common sample, which effectively inhibits the electron avalanche of the superhydrophobic sample and ultimately increasing the surface flashover voltage.