Effect of Plasma on Hydrophobicity Migration of Contaminated HTV Silicone Rubber

Abstract

Hydrophobicity and hydrophobic migration are important properties of silicone rubber composite materials, particularly for high voltage external insulation applications. These properties help to prevent water from penetrating the material and compromising its insulating properties. However, over time, contamination can occur on the surface of silicone rubber, reducing its hydrophobicity and ultimately its insulating performance. Plasma, a unique fourth state of matter, contains a high concentration of ions, electrons, and reactive groups. When plasma is used to treat the surface of HTV silicone rubber, it can modify the surface chemistry and change the hydrophobic properties of the material. Plasma treatment can be used to restore the hydrophobicity of contaminated silicone rubber, allowing it to retain its insulating properties. In this article, we analyze the effect of plasma treatment on contaminated HTV silicone rubber. By exposing the contaminated material to a specific intensity of plasma and then immediately testing its hydrophobic migration properties, we propose a mechanism for how plasma can restore the hydrophobicity of the silicone rubber. We also discuss the factors that can influence the effectiveness of plasma treatment, such as the plasma intensity, exposure time, and the nature of the contaminants. Overall, this research highlights the potential of plasma treatment as a method for restoring the hydrophobicity of contaminated HTV silicone rubber, thereby improving its insulating performance and extending its lifespan in high voltage external insulation applications.