Title :
The influence of temperature on the recovery of the hydrophobicity on silicone rubber surfaces
Author :
Jahn, Heiko ; Bärsch, Roland ; Wendt, Eckhard
Author_Institution :
Hochschule Zittau/Gorlitz, Univ. of Appl. Sci., Germany
Abstract :
The surface hydrophobicity of silicone rubbers can decrease by the influence of partial discharges (corona) or by the pollution with hydrophilic layers. These phenomena can be simulated in a laboratory. In this paper methods for the application of corona discharges and for the evaluation of the transfer of the hydrophobicity are presented. The hydrophobicity of different silicone rubbers was investigated with these methods. The influence of additional low molecular weight silicone fluids (LMW) was also investigated. The evaluation of the hydrophobicity was realized by measuring the dynamic receding angles. It was found that the hydrophobicity of silicone rubber decreases by corona treatment in a short time. The recovery of the hydrophobicity and the hydrophobicity transfer were evaluated at different temperatures. It was found that the temperature strongly influences the recovery after corona treatment and also the hydrophobicity transfer. At temperatures approaching 0°C the hydrophobicity recovery was significantly decreased
Keywords :
contact angle; corona; insulator contamination; partial discharges; silicone rubber; corona; dynamic receding angle; hydrophobicity recovery; hydrophobicity transfer; insulator pollution; low molecular weight silicone fluid; partial discharge; silicone rubber; surface hydrophobicity; temperature dependence; Corona; Goniometers; Insulation; Loss measurement; Pollution measurement; Rubber; Surface contamination; Surface discharges; Temperature; Time measurement;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2000 Annual Report Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-6413-9
DOI :
10.1109/CEIDP.2000.885272
