PVDF-g-PNIPAAm温敏抗污染膜的制备及性能研究  

Research on preparation and performance of temperature-sensitive antifouling poly(vinylidene fluoride)-graft-poly(N-isopropylacrylamide)

作　　者：白静娜[1] 冯霞[1] 陈莉[1] 申向[1] 赵义平[1] 刘美均[1] 郭艳芬[1] 

机构地区：[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300387

出　　处：《功能材料》2012年第6期794-797,802,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20774064);国家高技术研究发展计划(863计划)资助项目(2007AA03Z533);教育部科学技术研究重点资助项目(209005);天津市高校科技发展资助项目(20071214)

摘　　要：通过自由基共聚将聚(N-异丙基丙烯酰胺)(PNIPAAm)接枝到了碱处理聚偏氟乙烯(PVDF)粉末上,合成接枝共聚物PVDF-g-PNIPAAm。以此为原材料通过相转化法制备温敏抗污染分离膜。通过调控反应时间,达到不同的PNIPAAm接枝率,研究了不同接枝率对膜结构及性能的影响。结果表明,随着反应时间的延长,PNIPAAm的接枝率逐渐增加。成膜过程中发挥致孔作用明显致使膜表面的微孔数目逐渐增加。此外,PNIPAAm的接枝率越高膜的亲水性越强,且温敏性能提高。由于室温下PNIPAAm的亲水性,膜表面易形成水化层,从而提高改性膜的抗蛋白质污染性能。Alkali-treated poly（vinylidene flouride） copolymer （PVDF-g-PNIPAAm） was synthesized （PVDF） grafted poly （N-isopropylacrylamide） （PNIPAAm） via radical copolymerization and the different grafting ratio of PNIPAAm was obtained by regulating reaction time. The copolymer membranes were prepared by phase inversion method. The results indicated that the grafting ratio of PNIPAAm was enhanced with the increase of reaction time resulting in the formation of microporous structures on the membrane surface due to the pore-forming ability of the amphiphilic structure. In addition, the hydrophilicity and temperature-sensitivity were also im- proved with the increase of grafting ratio. At the room temperature, the copolymer membrane exhibited excellent protein-resistant property due to the hydrophilicty of PNIPAAm.

关 键 词：聚偏氟乙烯 PVDF-g-PNIPAAm 碱处理 抗污染:接枝率 

分 类 号：TQ316.6[化学工程—高聚物工业]