紫外臭氧辐照及NVP接枝改善SR表面湿滑性能

深圳大学化学与化工学院, 深圳 518060

有机高分子材料; 硅橡胶; 亲水性改性; 紫外臭氧处理; 辐照; 硅烷偶联剂; N-乙烯基吡咯烷酮

Improvement of wettability of SR via UV-Ozone radiation and NVP grafting
Gui Dayong, Liang Shuang, Zhao Haijuan, Ma Wenjie, and Wu Yiguang

Gui Dayong, Liang Shuang, Zhao Haijuan, Ma Wenjie, and Wu YiguangCollege of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, P.R.China

organic polymer materials; silicone rubber(SR); hydrophilic modification; UV-Ozone; irradiation; silane coupling agent; N-vinylpyrrolidone(NVP)

DOI: 10.3724/SP.J.1249.2014.06576

备注

利用紫外-臭氧(UV-Ozone)活化硅橡胶(silicone rubber, SR)表面后,通过偶联法接枝N-乙烯基吡咯烷酮(N-vinylpyrrolidone, NVP),对SR表面进行亲水性改性,以提高硅橡胶表面的湿滑性能.采用傅里叶衰减全反射谱(attenuated total reflection flourier transformed infrared spectroscopy, FTIR-ATR)、扫描电镜和能量色散X射线谱分析(scanning electron microscopy-energy dispersive X-ray spectroscopy, SEM-EDS)以及表面静态水接触角等手段,对改性硅橡胶表面进行了分析表征.结果表明,当辐射时间为60 min时,硅橡胶表面形成了大量Si—O键和—OH,达到了较好的辐射效果; 接枝N-乙烯基吡咯烷酮(NVP)的硅橡胶表面亲水性较好,表面接触角达到50°,在室温空气中亲水性能够保持2周左右.

The surface of silicone rubber(SR)was activated by UV-Ozone, and N-vinylpyrrolidone(NVP)was then grafted on the surface of SR through γ-methacryloxy propyl trimethoxy silane(KH-570)as a coupling agent to improve the surface wettability. The modification of SR surface was characterized by contact angle goniometry, attenuated total reflectance infrared spectroscopy, and scanning electron microscopy-energy dispersive X-ray analysis. The results show that the modification of silicone rubber under UV- Ozone radiation of 60 min forms a lot of Si—O bonds and —OH groups on the surface, which exhibits good irradiation effects on silicone rubber. After coupled with KH-570 as a reactive bridge, followed by grafting N-vinylpyrrolidone(NVP), the surface of silicone rubber reaches the excellent wettability with contact angle of 50°, which can keep for 2 weeks or so under atmosphere at ambient temperature.

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