两性离子聚合物共混改性聚偏氟乙烯膜性能研究  

Study on the PVDF Membranes Blending Modification with Zwitterionic Polymer

作　　者：周晓吉 黄晶 张迪 程莹 蒋文韬 白仁碧 ZHOU Xiaoji;HUANG Jing;ZHANG Di;CHEN Ying;JIANG Wentao;BAI Renbi(Center for Separation and Purification Materials and Technologies,Suzhou University of Science and Technology;Jiangsu Collabrative Innovation Center of Technology and Material Treatment,Suzhou 215009,China)

机构地区：[1]苏州科技大学分离净化材料与技术研发中心 [2]江苏省水处理技术与协同创新中心,江苏苏州215009

出　　处：《水处理技术》2020年第3期80-85,共6页Technology of Water Treatment

基　　金：国家自然科学基金(51478282);苏州分离净化材料与技术重点实验室项目(SZS201512).

摘　　要：采用活性自由基聚合成功地制备了1种含有两性离子的无规共聚物P(MMA-r-SBMA),并将其与聚偏氟乙烯(PVDF)材料共混,通过液致相分离制备多孔膜。利用扫描电镜、接触角、过滤等方法研究了两性离子聚合物对共混膜性能的影响。结果表明,两性离子具有明显的致孔性,共混膜的表面孔结构增多,孔隙率增大,断面结构指状孔得到进一步的延伸,提高了膜的纯水通量。以投加质量比1:2的[2-(甲基丙烯酰基氧基)乙基]二甲基-(3-磺酸丙基)氢氧化铵(SBMA)、甲基丙烯酸甲酯(MMA)作为添加剂,质量分数15%的二甲亚砜作为凝固浴制备的改性膜表现出较优抗污染性能,其过滤BSA溶液或正十六烷乳液后的通量基本能够完全恢复。A type of zwitterionic copolymer,P(MMA-r-SBMA),was synthesized through the free radical polymerization,and was blended with PVDF material to prepared a series of porous PVDF membranes through the liquid preparation phase inversion technique.The effect of zwitterionic polymer on the properties of the blend membranes were studied by SEM,contact angle and filtration experiments.The results showed that,the zwitterionic polymer had obviously pore-forming property and the pore structures and porosity on blend membranes surfaces increased.The finger-like pores in the crosssection structure were further extended which improved the pure water flux of the membrane.The modified membranes prepared by SBMA and MMA with mass ratio of 1:2 as the additive,and DMSO with mass fraction of 15%as coagulating bath showed better anti-fouling performance which the flux was almost recovered while during the filtration of BSA solution or hexadecane emulsion.

关 键 词：两性离子聚合物 改性偏氟乙烯膜 抗污染性 

分 类 号：TQ028.8[化学工程]