| HYDROPHOBICITY OF CONTAMINATED SILICONE RUBBER SURFACES |
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| 作者姓名： | Zhi-min Zheng Cai-hong Xu Jian Jiang Chang-yu Ren Wei Gao Ze-min Xie Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing China |
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| 作者单位： | Zhi-min Zheng;Cai-hong Xu;Jian Jiang;Chang-yu Ren;Wei Gao;Ze-min Xie Center for Molecular Science，Institute of Chemistry，Chinese Academy of Sciences，Beijing 100080，China |
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| 摘 要： | Silicone rubber (SIR) shows superior performance when used outdoors, but its surface can be transformed frominherently hydrophobic to hydrophilic by the adsorption of contaminants. Al(OH)_3, Al_2O_3, quartz powder and active carbonwere 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 SIRsurface. The increasing rate of contact angle of specimens contaminated by Al(OH)_3 was much faster than that by Al_2O_3 andquartz due to the adsorption of migrated low molecular weight (LMW) polydimethylsiloxanes. Specimens contaminated byactive carbon could achieve sunde hydrophobicity within 15 min because active carbon has high adsorbability. Surfaces ofcontaminated ultrapure SIR, polytetrafluoroethylene (PTFE) and glass remain hydrophilic because they contain no mobileLMW components. The addition of oligomeric polydimethylsiloxanes has little effect on the hydrophobicity of contaminantscovered on SIR surface.
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| 收稿时间： | 2002-01-11 |
| 修稿时间： | 2002-03-25 |
HYDROPHOBICITY OF CONTAMINATED SILICONE RUBBER SURFACES |
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| Zhi-min Zheng,Cai-hong Xu,Jian Jiang,Chang-yu Ren,Wei Gao,Ze-min Xie Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing ,China.HYDROPHOBICITY OF CONTAMINATED SILICONE RUBBER SURFACES[J].Chinese Journal of Polymer Science,2002,0(6):559-564. |
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| Authors: | Zhi-min Zheng Cai-hong Xu Jian Jiang Chang-yu Ren Wei Gao Ze-min Xie |
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| Institution: | Center for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100080; China |
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| Abstract: | Silicone rubber (SIR) shows superior performance when used outdoors, but its surface can be transformed frominherently hydrophobic to hydrophilic by the adsorption of contaminants. Al(OH)_3, Al_2O_3, quartz powder and active carbonwere 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 SIRsurface. The increasing rate of contact angle of specimens contaminated by Al(OH)_3 was much faster than that by Al_2O_3 andquartz due to the adsorption of migrated low molecular weight (LMW) polydimethylsiloxanes. Specimens contaminated byactive carbon could achieve sunde hydrophobicity within 15 min because active carbon has high adsorbability. Surfaces ofcontaminated ultrapure SIR, polytetrafluoroethylene (PTFE) and glass remain hydrophilic because they contain no mobileLMW components. The addition of oligomeric polydimethylsiloxanes has little effect on the hydrophobicity of contaminantscovered on SIR surface. |
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| Keywords: | Hydrophobicity Silicone rubber Contact angle Contamination |
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