Surface Degradation of Silicone Rubber Nanocomposites Due to DC Corona Discharge

Vas, Joseph Vimal and Thomas, Joy M (2014) Surface Degradation of Silicone Rubber Nanocomposites Due to DC Corona Discharge. In: IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 21 (3). pp. 1175-1182.

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Abstract

Corona discharge is recognized as one of the mechanisms that can influence the surface hydrophobicity of Silicone Rubber (SR) because of the chemical changes that occur on its surface. In this study SR samples were exposed to positive and negative DC corona for 25 and 50 hours using a needle-plane electrode system. Hydrophobicity changes were monitored using a sessile drop contact angle measurement facility. The physical changes on the surface were studied using Scanning Electron Microscopy (SEM) and surface roughness measurements. The effect of positive dc corona was found to be different from that of negative dc corona. Significant surface degradation and loss of hydrophobicity was found in the case of negative dc corona exposed samples. Significant improvement in the above mentioned properties were obtained by adding small quantities of nSIL into the SR matrix.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	Copy right for this article belongs to the IEEE
Keywords:	Outdoor insulators; polymeric composite insulators; nanocomposites; dc corona
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	14 Aug 2014 10:32
Last Modified:	14 Aug 2014 10:32
URI:	http://eprints.iisc.ac.in/id/eprint/49558

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