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接触角法研究温敏性微凝胶相变前后的亲疏水性
The study of hydrophilic-to-hydrophobic transition of temperature-sensitive microgel by contact angle measurement
【摘要】 采用光学视频接触角测量仪研究了聚(N-异丙基丙烯酰胺)(PNIPAM)微凝胶在相转变前后的亲疏水性变化。结果表明:PNIPAM微凝胶在32℃附近发生了亲水性-疏水性的反转,微凝胶薄膜的接触角变化显著;随温度增加,接触角从31℃时的73.1°到33℃时的83.2°,而表面自由能从38.5 mN/m下降至32.08 mN/m。
【Abstract】 The hydrophilic-to-hydrophobic transition of poly(N-isopropyl acrylamide)(PNIPAM) microgel was studied using a Video based contact angle measuring device. It was found that the contact angle values of PNIPAM microgel film were changed from 73.1°at 31℃ to 83.2° at 33℃, indicating that hydrophilic-to-hydrophobic transition of the mi-crogels occurred around 32℃ on the other hand, surface free energy of PNIPAM microgel film decreased from 38.5 mN/ m at 31℃ to 32.08 mN/m at 33℃.
【关键词】 接触角;
聚(N-异丙基丙烯酰胺);
微凝胶;
温度敏感性;
亲疏水性;
【Key words】 temperature sensitivity; PNIPAM; microgel; contact angle; hydrophilic-hydrophobic property;
【Key words】 temperature sensitivity; PNIPAM; microgel; contact angle; hydrophilic-hydrophobic property;
【基金】 教育部科学技术研究重点项目(10557)
- 【文献出处】 合成技术及应用 ,Synthetic Technology and Application , 编辑部邮箱 ,2005年03期
- 【分类号】O648.1
- 【被引频次】13
- 【下载频次】488