两性离子聚合物表面改性的聚偏氟乙烯抗污染膜的制备及性能  

Antifouling Poly( Vinylidene Fluoride) Membrane Prepared by Surface Modification with Zwitterionic Polymer

作　　者：冯霞[1] 王倩[1] 白静娜[1] 赵义平[1] 申向[1] 陈熙[1] 陈莉[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300160

出　　处：《高分子材料科学与工程》2014年第7期71-75,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21174103);天津市自然科学基金资助项目(12JCYBJC11200);高等学校博士学科点专项科研基金(20121201110003;20121201120005)

摘　　要：提高聚偏氟乙烯(PVDF)抗污染性能是改善PVDF应用效果的重要途径。文中通过自由基聚合的方法将抗污染材料——两性离子类化合物磺酸甜菜碱(DMAPS)接枝到碱处理过的PVDF膜表面。研究了接枝DMAPS后,PVDF膜表面的结构与性能变化,并初步探讨了改性后的PVDF膜对牛血清蛋白的吸附性能。结果表明,在PVDF膜表面接枝DMAPS后,膜表面孔洞减小,亲水性提高。虽然改性后的PVDF膜通量有所下降,但通过牛血清蛋白(BSA)的振荡吸附实验发现,两性离子改性膜表现出良好的抗蛋白质吸附性能。与PVDF原膜相比,改性膜在BSA溶液中通量下降率小,用水清洗后膜通量恢复率高。Increasing the antifouling properties is the important way to improve the application effect for PVDF membrane. In this study, the zwitterionic material, sulfobetaine（DMAPS） was grafted to the surface of PVDF membrane which was alkali-treated. The surface structure and properties of PVDF membrane were investigated, and the bovine serum albumin （BSA）adsorption performance of the modified PVDF membrane was studied. The results show that after being modified by zwitterionic DMAPS, PVDF membrane shows smaller surface pore size and better hydrophilicity. Furthermore, the resistance to protein adsorption of the PVDF modified membrane is improved greatly. Compared to PVDF membrane, the modified membranes represent lower flux reduction ratio in BSA solutions and higher flux recovery ratio after washed with pure water.

关 键 词：膜污染 聚偏氟乙烯 磺酸甜菜碱 两性离子 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]