NDLI: Loss and recovery of hydrophobicity and surface energy of HTV silicone rubber

Content Provider	IEEE Xplore Digital Library
Author	Tokoro, T. Hackam, R.
Copyright Year	1994
Abstract	The loss of surface hydrophobicity of high temperature vulcanized (HTV) silicone rubber (SIR) due to immersion in saline solutions (0.005 to 100 mS/cm) has been studied as a function of immersion time (0 to 576 h) and temperature (0 to 98/spl deg/C). The subsequent recovery of the hydrophobicity in air is determined also. The loss and recovery of the hydrophobicity is correlated with the absorption of water during immersion and its subsequent desorption in air. The hydrophobicity is determined by measuring the static contact angle /spl theta/ between the tangent to a droplet of distilled water and the horizontal HTV-SIR surface. The surface energies /spl gamma//sub S/, /spl gamma//sub SD/ and /spl gamma//sub SH/ of HTV-SIR, the energy of adhesion W/sub SL/ and the surface tension /spl gamma//sub SL/ of water to HTV-SIR were determined as a function of time of immersion (loss of hydrophobicity), the time of recovery of hydrophobicity and the contact angle of water. For virgin HTV-SIR at 24.5/spl plusmn/3.5/spl deg/C the surface energies were determined to be /spl gamma//sub S/=31.6 mJ/m/sup 2/, /spl gamma//sub SD/=28.5 mJ/m/sup 2/, /spl gamma//sub SH/=3.1 mJ/m/sup 2/, W/sub SL/=61.4 mJ/m/sup 2/ and /spl gamma//sub SL/=43.0 J/m/sup 2/. These values are in reasonable agreement with the literature.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
Starting Page	1088
Ending Page	1097
Page Count	10
File Size	1057404
File Format	PDF
ISSN	10709878
Volume Number	8
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rubber Temperature Surface contamination Dielectrics and electrical insulation Cities and towns Absorption Adhesives Surface tension Environmentally friendly manufacturing techniques Pollution
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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