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空气段间距对CA/PES共混超滤膜影响

作者：顾志云，许振良，魏永明，杨虎

单位：化学工程联合国家重点实验室，华东理工大学化学工程研究所膜科学与工程研发中心，上海200237

关键词：空气段；共混；超滤膜；醋酸纤维素；聚醚砜

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2016,36(5):31-35

摘要：

采用带空气段的非溶剂致相分离(NIPS)法制备了CA/PES共混中空纤维超滤膜。通过前期实验确定了CA/PES溶液的总浓度为25wt%，CA和PES的质量比为9:1。研究了空气段间距(1-17 cm)对CA/PES共混超滤膜的性能的影响。实验结果表明，空气段间距为9cm时，CA/PES共混超滤膜的通量为73.3L•m-2•h-1，对PEG20000的截留率达84.2%，膜孔径为4.6nm。

CA/PES hollow fiber ultra-filtration (UF) membranes were prepared via non-solvent induced phase separation (NIPS)method with air gap. Based on the previous experiments, the total concentration of cellulose acetate (CA)/ polyethersulphone (PES) blend solution was chosen as 25wt% and the mass ratio of CA/PES was 9:1. The effect of the air-gap distance on the performance of CA/PES UF membranes was investigated. The results showed that the UF membrane has a pure water flux of 73.3L•m-2•h-1, a PEG20000 rejection of84.2% and 4.6 nm pore size when the UF membrane was prepared with an air gap of9 cm.

基金项目：

2013年国家新材料研发及产业化专项(GX1301)、国家科技支撑计划项目(2014BAB07B01)和江苏省科技工业支撑计划(BE2013031)。

作者简介：

作者简介：顾志云（1990-），女，江苏泰州人，硕士研究生，主要从事膜分离技术的研究工作。通讯联系人：魏永明，Tel：021-64253670；Email：ymwei@ecust.edu.cn

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