程毅丽,康国栋,贾静璇,刘健辉,曹义鸣

• 1:中国科学院大连化学物理研究所洁净能源国家实验室
• 2:中国科学院大学

摘要(Abstract)：

通过多巴胺的自聚附着行为,对聚四氟乙烯(PTFE)中空纤维膜进行亲水改性。采用扫描电镜(SEM)、X射线光电子能谱(XPS)、红外光谱(FT-IR)和接触角(CA)对膜改性前后的表面形貌、化学组成和亲水性进行了表征。研究了改性条件对膜纯水通量的影响,并以牛血清蛋白(BSA)溶液为污染物考察了改性前后膜的抗污染性能。结果表明,多巴胺被成功引入PTFE膜表面,改性12 h时膜表面的F元素含量降低2.14%,O元素含量增加3.06%。膜的亲水性得到显著改善,水接触角由改性前的110°降低至改性后的80°。改性8 h时,纯水通量达原膜通量的1.5倍。改性前后膜孔径变化不大,但改性后的PTFE膜具有更好的抗污染性能,清水清洗后的通量恢复率在90%以上。

关键词(KeyWords)： 聚四氟乙烯;多巴胺;亲水;润湿性;抗污染

Abstract:

Keywords:

基金项目(Foundation): 国家青年自然科学基金(21206157);; 国家科技支撑计划(2014BAI11B00)

作者(Author): 程毅丽,康国栋,贾静璇,刘健辉,曹义鸣

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