单内皮层中空纤维聚离子复合膜的组装及其渗透汽化性能  

Inner skin hollow fiber polyion composite membranes assembled and its pervaporation performance

作　　者：宋雪[1] 张国俊[1] 纪树兰[1] 王乃鑫[1] 刘忠洲[2] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100022 [2]中国科学院生态环境研究中心,北京100085

出　　处：《膜科学与技术》2009年第5期1-5,共5页Membrane Science and Technology

基　　金：北京市自然科学基金重点基金项目(8071001);北京市科技发展计划项目(Z08000603170801);国家自然科学基金项目(20806001;20876003);国家重点基础研究发展计划(973计划;2009CB623404)

摘　　要：采用单内皮层中空纤维PAN超滤膜作为基膜,通过动态负压层-层静电吸附法在内皮层上组装聚电解质派对PEI/PAA,制得单内皮层中空纤维聚离子复合膜.研究了支撑层、派对数、负压侧真空度、循环流速等动态组装条件对复合膜渗透汽化性能的影响,考察了复合膜对不同醇/水体系的渗透汽化分离性能.结果表明,当进料液为50℃的质量分数95%异丁醇/水体系时,分离因子达23 731,渗透通量为360.5 g/(m2.h),显示了较好的渗透汽化性能.Inner skin hollow fiber polyion composite membranes were successfully assembled by dynamic negative pressure layer- by- layer absorption of PEI/PAA polyelectrolyte on the hollow fiber PAN ultrafiltration support membranes. Meanwhile, the effects of support membranes and vacuum and flow velocity on the pervaporation mixture were subsequently researched. The pervaporation performances of the polyion composite membranes were also investigated by using different alcohol/water mixtures. In the case of pervaporation of 95 % t - bu- tanol/water mixture, under the temperature of 50 ℃, the separation factor and the permeate flux of the polyion complex membrane were about 23 731 and 360.5 g/（m2· h）, respectively.

关 键 词：中空纤维 聚离子复合膜 渗透汽化 动态负压LBL技术 

分 类 号：TQ028.8[化学工程]