膜科学与技术

气隙长度与芯液浓度对纤维素中空纤维膜结构与性能的影响

作者：梁义宋俊程博闻陆飞

单位：天津工业大学中空纤维膜材料与膜过程教育部重点实验室

关键词：气隙长度; 芯液浓度; 氯代1-烯丙基-3-甲基咪唑; 纤维素; 中空纤维膜

出版年,卷(期):页码： 2011,31(2):83-88

摘要：

以离子液体氯代1-烯丙基-3-甲基咪唑([AMIM]Cl)为溶剂来纺制纤维素中空纤维膜，考察了气隙长度与芯液浓度对中空纤维膜结构与性能的影响。采用扫描电子显微镜(SEM)对膜内、外表面形态及支撑层结构进行了观察，测试了中空纤维膜的水通量、截留率等渗透性能以及最大拉伸强度、断裂伸长率、杨氏模量等力学性能。结果表明：随着气隙长度与芯液浓度的增加，中空纤维膜外表面与支撑层孔洞结构变小，内表面结构变得更加规整，膜孔隙率与水通量下降，最大拉伸强度、断裂伸长率、杨氏模量等力学性能则逐渐变大；与芯液浓度相比，气隙长度对中空纤维膜性能的影响较为显著。

The cellulose hollow fiber membranes were spinned using ionic liquid 1-ally-3methylimidazolium chloride([AMIM]Cl) as solvent. Influence of air gap length and bore liquid concentration on the hollow fiber membranes structure and properties were investigated. Inner- and outer- surfaces morphology and the support layer structure of the membranes were studied using scanning electron microscopy(SEM). Furthermore, permeation properties and mechanical properties of the membranes, including water flux, retention rate, ultimate tensile strength(UTS), elongation at break, young's modulus were also tested. The results induce that, with the increase of air gap length and bore liquid concentration, the pores become smaller and the inner surface show more regular. Contrary to decreased porosity and water flux, mechanical properties of ultimate tensile strength, elongation at break, young's modulus show a increased tendency. Compared with the bore liquid concentration, the air gap length has a more significant influence on the hollow fiber membrane properties.

第一作者：梁义，（1985- ）男，河南周口人，硕士研究生，主要研究纤维素中空纤维膜，E-mail: liangyi_tjpu@yahoo.cn； *通讯作者：程博闻，（1963- ）男，湖北黄冈人，教授，主要从事膜材料及工艺研发工作，E-mail: bowen@tjpu.edu.cn

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