Preparation and Performance of RTV Coating for Anti-Pollution Flashover with Superhydrophobicity by Filling CaCO₃/SiO₂ Composite Particles into Silicone Rubber

Abstract:

Room temperature vulcanizing (RTV) silicone rubber coating with superhydrophobicity for anti-pollution flashover is prepared by filling silica-encapsulated calcium carbonate particles (CaCO3/SiO2 composite particles) into polydimethylsiloxane (PDMS) rubber. Two-step spraying technology is applied for fabricating the superhydrophobic RTV coating film on outdoor insulators. The primary spray coating provides basically the strong adhesion and certain hydrophobicity, and the second one produces the appropriate roughness structure and further enhances the superhydrophobicity. The water contact angle on the prepared RTV coating film is 165°and the sliding (rolling) angle of water droplet is about 5°, allowing water droplets to move easily on the coating surface and give self-cleaning function of the RTV coated insulator surface. The flashover voltage of insulators with superhydrophobic RTV coating is 29.95 kV, quite higher than that of insulators with common RTV coating (23.29) and that without RTV coating (11.34 kV).

• Periodical: Advanced Materials Research (Volumes 328-330)
• Pages: 1263-1267
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.328-330.1263
• Online since: September 2011
• Authors: Jing Hai, Jin Xin Yang, Jiang Cheng, Zhuo Ru Yang
• Keywords: Anti-Flashover, Coating, Composite Particles, Silicone Rubber, Superhydrophobicity

References

[1] Z. D. Jia, S. Fang and H. F. Gao etal.: IEEE Electrical Insulation Magazine, Vol. 24(2008), p.28.

[2] H. Murase, T. Fujibayashi: Prog. Org. Coatings, Vol. 31 (1997), p.97.

[3] W. Barthlott, C. Neinhuis: Planta, Vol. 202 (1997), p.1.

[4] I. Woodward, W.C.E.V. Roucoules, J.P.S. Badyal: Langmuir, Vol. 23 (2007), p.8212.

[5] X.J. Feng, L. Feng and M.H. Jin etal.: J. Am. Chem. Soc., Vol. 126 (2004), p.62.

[6] H.M. Shang, Y. Wang and S.J. Limmer etal.: Thin Solid Films, Vol. 472 (2005), p.37.

[7] K. Teshima, H. Sugimura and Y. Inoue etal.: Appl. Surf. Sci., Vol. 244 (2005), p.619.

[8] H. Notsu, W. Kubo and I. Shitanda etal.: J. Mater. Chem., Vol. 15(2005), p.1523.

[9] Y. Wu, H. Sugimura and Y. Inoue etal.: Chem. Vap. Deposition, Vol. 8(2002), p.47.

[10] H. Li, X. Wang and Y. Song etal.: Angew. Chem., Vol. 113(2001), p.1793.

[11] L. Feng, S. Li and H. Li etal.: Angew. Chem. Int. Ed., Vol. 41(2002), p.1221.

[12] C. Guo, L. Feng and J. Zhai etal.: Chem. Phys. Chem., Vol. 5(2004), p.750.

[13] X. Lu, C. Zhang and Y. Han: Macromol. Rapid Commun., Vol. 25(2004), p.1606.

[14] Q. Xie, J. Xu and L. Feng etal.: Adv. Mater., Vol. 16(2004), p.302.

[15] H.Y. Erbil, A.L. Demirel and Y. Avci: Science, Vol. 299(2003), p.1377.

[16] H. Yabu, M. Takebayashi and M. Tanake etal.: Langmuir, Vol. 21(2005), p.3235.

[17] J. X. Yang, J. Cheng and Z. R. Yang etal.: Applied Surface Science, Vol. 255(2009), p.3507.