PMMA-b-PEG-b-PMMA对相转化法制备PVDF多孔膜的改性研究  

Effect of PMMA-b-PEG-b-PMMA on the Performance of PVDF Membrane via NIPS

作　　者：杜德[1] 何春菊[1,2] 

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维改性国家重点实验室,上海201620

出　　处：《化学世界》2014年第11期668-671,704,共5页Chemical World

基　　金：国家"863"计划项目(2012AA03A605);教育部新世纪人才计划(NCET-12-0827);国家自然基金(51103019;21174027)

摘　　要：聚偏氟乙烯(PVDF)作为常用的微滤/超滤膜材料,因疏水、易受污染的特点导致其应用受到限制。采用PMMA-b-PEG-b-PMMA两亲聚合物为改性剂,以浸没-沉淀相转化法制备PVDF多孔膜,通过扫描电镜、力学拉伸、表面接触角、水通量测试等方法,表征了两亲聚合物的共混改性对膜结构与性能的影响。结果表明随着两亲嵌段聚合物含量的增加,膜主体结构都能保持海绵状结构,表面接触角从95°下降到65°,清水通量与BSA溶液通量都明显提高,PVDF膜的亲水性得到明显改善。In order to improve the hydrophilicity of PVDF membrane to obtain a broader application,amphiphilic polymer PMMA-b-PEG-b-PMMA was blended with PVDF as a modifier of blend membranes,which were prepared by immersion-precipitation phase inversion method.Effects of membrane structure and properties were characterized by scanning electron microscopy,contact angle,mechanical stretching and water flux testing.The result showed that the loose sponge-like structure was obtained since triethyl phosphate（TEP）as a solvent;With the increasing content of the amphiphilic block polymer,surface contact angle of membrane was decreased from 95°to 65°,flux of water and BSA solution were improved greatly,and hydrophilicity of PVDF membrane improved significantly.

关 键 词：聚偏氟乙烯 两亲嵌段聚合物 浸没沉淀相转化法 共混改性 

分 类 号：TU599[建筑科学—建筑技术科学]