不同接枝率对PVDF-g-PNIPAAm温敏膜性能影响研究

功能材料, 2011, 42(5): 865-868.

不同接枝率对PVDF-g-PNIPAAm温敏膜性能影响研究

林先凯 ^1, , 冯霞 ^2, , 陈莉 ^3, , 郭艳芬 ^4, , 赵义平 ^5,

1.天津工业大学材料科学与工程学院,"中空纤维膜材料与膜过程"省部共建国家重点实验室培育基地,天津,300160

2.天津工业大学材料科学与工程学院,"中空纤维膜材料与膜过程"省部共建国家重点实验室培育基地,天津,300160

3.天津工业大学材料科学与工程学院,"中空纤维膜材料与膜过程"省部共建国家重点实验室培育基地,天津,300160

4.天津工业大学材料科学与工程学院,"中空纤维膜材料与膜过程"省部共建国家重点实验室培育基地,天津,300160

5.天津工业大学材料科学与工程学院,"中空纤维膜材料与膜过程"省部共建国家重点实验室培育基地,天津,300160

基金项目: 国家自然科学基金(20774064) 教育部科学技术研究重点资助项目(209005) 天津市高等学校发展基金(20071214) 国家高技术研究发展计划(863计划)资助项目(2007AA03Z533)

关键词：聚偏氟乙烯 , N-异丙基丙烯酰胺 , 温敏膜

Effect of different graft ratio on the properties of PVDF-g-PNIPAAm temperature sensitive membranes

以聚偏氟乙烯(PVDF)为基材,分别采用直接引发原子转移自由基聚合(ATRP)和碱处理后自由基聚合的方法接枝N-异丙基丙烯酰胺(NIPAAm),合成出不同接枝率的PVDF-g-PNIPAAm共聚物,然后用相转化法制备出PVDF-g-PNIPAAm共聚温敏膜.用核磁共振(1H NMR)和X射线光电子能谱(XPS)分别对共聚物和共聚膜的化学组成进行了表征,用压汞仪测试了膜的孔结构.结果表明,与ATRP法相比,碱处理法能得到更高接枝率的产物.通过不同温度下牛血清蛋白(BSA)截留率研究膜的温度敏感行为,发现共聚膜的温敏行为受PNIPAAm接枝率影响,AT-RP法和碱处理法制备的共聚膜的温敏行为相反.

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