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。
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-hydmphobic transition of the microgels 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 ℃.
出处
《合成技术及应用》
2005年第3期1-4,共4页
Synthetic Technology & Application
基金
教育部科学技术研究重点项目(10557)
