Surface Modification of Epoxy-Ceramic Coatings by Plasma Treatment

Abstract

A coating was made by electrostatic spraying of epoxy resin / TiO2 particles for the purpose of suppressing audible noise caused by corona discharge on high-voltage transmission lines. Wetting property of the coating was improved by oxygen plasma treatment. It was found that the coating became more wettable as the increase of TiO2 content during electrostatic spraying process. With respect to the coating for suppression of audible noise from transmission lines, the optimal mass ratio of TiO2 particles (diameter:5-10μm ) to epoxy resin was 30%, and the contact angle was 73°on the epoxy / TiO2 coating surface which could be reduced to less than 5°after oxygen plasma treatment for 20s.