Abstract
Dynamic drop test for studying the temporal lowering of hydrophobicity on the surface of silicone rubber with direct current voltage application was carried out. In this study, we evaluated the influence of the temporal lowering of hydrophobicity under various conductivities and dropping rates for water droplets. As a result, it was found that the dropping rate and the conductivity of water droplets greatly influenced the hydrophobicity loss time on the surface of silicone rubber.
Highlights
The development of insulating materials used in electric-powered apparatuses plays an essential role in a stable power supply
Experimental methods The temporal decrease of hydrophobicity on the surface of the polymer material for the DDT is evaluated by dropping water in small amounts under DC voltage application in DDT
We evaluated the influence of the temporal lowering of hydrophobicity under various conductivities and dropping rates
Summary
The development of insulating materials used in electric-powered apparatuses plays an essential role in a stable power supply. For example, have attracted attention in recent years. The use of polymer materials for housings of insulators and arresters has increased. The widely accepted polymer materials for housings are silicone rubber [SiR] and ethylene vinyl acetate. These polymer materials have some excellent properties such as being lightweight, hydrophobicity, and antiweatherability [1]. Even if the hydrophobicity initially disappears by external stresses, the hydrophobicity recovers because of the migration of low molecular weight SiR in a short time [2,3,4,5]
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