膜科学与技术

具有微米级内外径CTA中空纤维膜制备与表征

作者：魏永明，吴荣荣，许振良，许海涛

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：三醋酸纤维素; 中空纤维膜; 干湿法; 微米级内外径

出版年,卷(期):页码： 2018,38(5):8-14

摘要：

本文利用干湿法通过改变纺膜条件来调控中空纤维膜尺寸制备具有微米级内外径三醋酸纤维素（CTA）中空纤维膜。结果表明：中空纤维膜的内外径随铸膜液流速和芯液流速的增加而增加，随收丝速度的增加而减小；内外径随空气段高度的增大而略微减小。其中，铸膜液和芯液流速对膜的尺寸影响最为显著。此外，考察了这些因素对膜微观结构及纯水通量性能的影响，结果表明，本研究中这些因素对膜结构的影响较小，所有的膜都具有海绵状孔；纯水通量随着铸膜液和芯液流速的增加而显著增加，随空气段高度和收丝速度的增加而稍有增加。

Cellulose triacetate (CTA) hollow fiber membrane with micron-sized inner and outer diameters was prepared using dry-wet spinning method by changing fabrication parameters to control the dimension of hollow fiber membranes. The results show that the inner and outer diameter of the hollow fiber membranes increased with the increase of dope and bore flow rate and decrease with the increase of take-up speed. The inner and outer diameter decreased slightly with the increase of air gap distance. The influence of dope and bore flow rate on membrane diameters was most significant among all the parameters. Besides, the effect of these factors on morphology and pure water flux of hollow fiber membranes was investigated. The results showed that morphology of membranes in this study is insensitive to these factors and all prepared membranes have spongy-like structure. Pure water flux of membranes increased obviously with the increase of dope and bore flow rate but increased slightly with the increase of take-up speed and air gap distance.

第一作者简介：魏永明（1977－），男，山东潍坊市人，博士，副教授，从事分离膜微观结构调控研究，E-mail：ymwei@ecust.edu.cn，电话：13311998720；*共同第一作者：吴荣荣（1993-），女，河南省濮阳市人，硕士生，研究方向为膜色谱，Email：m15300868632@163.com，电话：15300868632。

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