We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
HYDROPHOBICITY OF CONTAMINATED SILICONE RUBBER SURFACES.
- Authors
Zhi-min Zheng; Cai-hong Xu; Jian Jiang; Chang-yu Ren; Wei Gao; Ze-min Xie
- Abstract
Silicone rubber (SIR) shows superior performance when used outdoors, but its surface can be transformed from inherently hydrophobic to hydrophilic by the adsorption of contaminants. Al(OH)[sub 3], Al[sub 2]O[sub 3], quartz powder and active carbon were selected as authentic contaminants. Hydrophobicity of the surface was determined using contact angle measurement. The results indicate that the adsorbability of the contaminants can strongly affect the hydrophobicity of contaminated SIR surface. The increasing rate of contact angle of specimens contaminated by Al(OH)[sub 3] was much faster than that by Al[sub 2]O[sub 3] and quartz due to the adsorption of migrated low molecular weight (LMW) polydimethylsiloxanes. Specimens contaminated by active carbon could achieve surface hydrophobicity within 15 min because active carbon has high adsorbability. Surfaces of contaminated ultrapure SIR, polytetrafluoroethylene (PTFE) and glass remain hydrophilic because they contain no mobile LMW components. The addition of oligomeric polydimethylsiloxanes has little effect on the hydrophobicity of contaminants covered on SIR surface.
- Subjects
SILICONE rubber; HYDROPHOBIC surfaces
- Publication
Chinese Journal of Polymer Science (World Scientific Publishing Company), 2002, Vol 20, Issue 6, p559
- ISSN
0256-7679
- Publication type
Article