Study on Super Hydrophobic Modification of RTV Anti Pollution Flashover Coatings Doped with Nano-SiC and CW

Abstract

Using nano SiC and Carnauba Wax(CW) to modify RTV anti pollution flashover coating, a super hydrophobic silicone rubber coating with micro nano structure on the surface was prepared by semi curing RTV one-step spray molding method. The hydrophobic characteristics of the coating surface were studied by means of static contact angle and rolling angle test. The self-cleaning, high temperature resistance and wear resistance tests were carried out on the RTV super hydrophobic surface to study its comprehensive surface properties. The results showed that the modified silicone rubber had the best hydrophobic property when the mass ratio of nano SiC to CW was 2:1; When the pH is 1~13, the contact angle is controlled at 150.4 °～154.4 °, and the rolling angle is controlled at 5.4 °～9.5 °; After heat treatment for 120h at 70 ℃, the contact angle and rolling angle are 150.2 ° and 8.9 ° respectively; The modified RTV coating can maintain good super hydrophobic property when the wear distance is within 90 mm.