Research on the Preparation of Modified TiO2 Composite Coatings with Anti-Fouling and Flashover Resistance
In order to effectively reduce the occurrence of pollution flashover accidents caused by surface contamination of transmission line in-sulators,a new fluorocarbon coating material was prepared by combining modified nano-TiO2,PTFE and fluorocarbon resin FEVE using com-pressed air spraying technology.The optimum addition amount of modified TiO2 particles was discussed.The microstructure was studied using scanning electron microscopy(SEM)and atomic force microscopy(AFM).The hydrophobicity,self-cleaning properties and anti-ultraviolet aging resistance were analyzed using a contact angle measurement instrument.The results showed that the optimum addition amount of modified nano-TiO2 was 4％,the adhesion of the coating reached grade 0,and the maximum static contact angle was 121°.The surface of the anti-pollu-tion flashover composite coating prepared with modified TiO2 exhibited numerous micro-nano scale columnar cone tip structures,resulting in higher roughness.Its hydrophobicity,self-cleaning ability,and anti-ultraviolet aging resistance were improved,demonstrating excellent anti-pollution flashover performance.
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