尹逊迪,黄志辉,包永忠

• 1:化学工程联合国家重点实验室(浙江大学)，浙江大学 化学工程与生物工程学院，浙江 杭州 310027

摘要(Abstract)：

为了改进聚氯乙烯（PVC）超滤膜的渗透和抗生物污染特性，采用单电子转移-蜕化转移活性自由基聚合制备了聚丙烯酸-b-聚氯乙烯-b-聚丙烯酸三嵌段共聚物（PAA-b-PVC-b-PAA），并采用非溶剂诱导相转移法制备了PAA-b-PVC-b-PAA改性的PVC超滤膜。发现PAA-b-PVC-b-PAA具有微相分离特性，对应PVC和PAA嵌段的玻璃化温度分别为80和108oC。PAA-b-PVC-b-PAA的引入使膜的指状结构增大。由于PAA-b-PVC-b-PAA共聚物在膜表面的富集，共混物超滤膜的水通量随着PAA链长的增长而增大。随着pH值变化，PAA链段的荷电性和构象变化，使共混物超滤膜的渗透行为具有可逆pH响应性，pH值由2.3增大到11.6时，水通量明显下降；在强酸性和碱性条件下，PAA链段与牛血清蛋白存在强的电荷排斥作用，通量和抗污染性较好。

关键词(KeyWords)： 聚氯乙烯;聚丙烯酸;嵌段共聚物;超滤膜;通量

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（21676235）。

作者(Author): 尹逊迪,黄志辉,包永忠

DOI: 10.3969/j.issn.1003-9015.2017.00.025

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