聚醚酰亚胺
膜
乙醚
渗透
甲醇
气体分离
聚合物
化学工程
高分子化学
溶剂
纤维
凝结
材料科学
中空纤维膜
化学
有机化学
心理学
工程类
精神科
生物化学
作者
D. Wang,Kang Li,W.K. Teo
出处
期刊:Acs Symposium Series
日期:1999-12-29
卷期号:: 96-109
被引量:4
标识
DOI:10.1021/bk-2000-0744.ch007
摘要
The internal coagulant plays a very important role in the preparation of hollow fiber membranes. In this paper, the influence of the internal coagulant on hollow fiber formation, structures, and gas separation performance of polyethersulfone (PESf) and polyetherimide (PEI) membranes are presented. The internal coagulants used include water, methanol, ethanol, 2-propanol, and mixtures of the alcohols and water. Water was always used as the external coagulant. Polymer dopes containing a polymer and a solvent mixture of N-methyl-2-pyrrolidone (NMP) and ethanol (EtOH) were formulated to give low coagulation values. The correlation of coagulant properties with gas permeation properties, membrane structure, and membrane integrity is addressed.
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