界面聚合制备含丙烯氧基团的复合膜用于CO2分离

doi:10.3969/j.issn.0438-1157.2014.11.029

化工学报 ›› 2014, Vol. 65 ›› Issue (11): 4420-4429.DOI: 10.3969/j.issn.0438-1157.2014.11.029

界面聚合制备含丙烯氧基团的复合膜用于CO₂分离

何文娟, 王志, 李雯, 李诗纯, 王纪孝

天津大学化工学院化学工程研究所, 天津化学化工协同创新中心, 化学工程联合国家重点实验室(天津大学), 天津市膜科学与海水淡化技术重点实验室, 天津 300072

收稿日期:2014-04-29 修回日期:2014-05-31 出版日期:2014-11-05 发布日期:2014-11-05
通讯作者: 王志
基金资助:
国家高技术研究发展计划项目(2012AA03A611);国家自然科学基金项目(21276176).

Interfacially polymerized composite membranes containing propylene oxide groups for CO₂ separation

HE Wenjuan, WANG Zhi, LI Wen, LI Shichun, WANG Jixiao

Tianjin Key Laboratory of Membrane Science and Desalination Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received:2014-04-29 Revised:2014-05-31 Online:2014-11-05 Published:2014-11-05
Supported by:
supported by the National High Technology Research and Development Program of China (2012AA03A611) and the National Natural Science Foundation of China (21276176).

摘要/Abstract

摘要： 含有醚氧基团的膜与CO₂分子具有较强的极性作用,可以实现对CO₂/N₂物系的高效分离.其中,含丙烯氧(PO)基团的聚合物链段自由体积较大且不易结晶,是一类具有发展潜力的溶解选择性膜材料.以均苯三甲酰氯为油相单体,含PO基团的多胺为水相单体,通过界面聚合,成功制备了含PO基团的复合膜.分别采用聚醚胺D400、D230及T403为多胺水相单体,考察了膜内PO基团数量和交联度对复合膜分离性能的影响.结果表明,采用D400所制的复合膜由于具有最高的PO基团含量及较低的交联度,因此具有最高的CO₂渗透速率和CO₂/N₂分离因子.之后,考察了单体浓度、酸吸收剂种类以及水相溶液pH对复合膜分离性能的影响.通过优化这些制膜条件,制备出了CO₂/N₂分离性能较好的复合膜.

关键词: 膜, 分离, 溶解选择, 界面聚合, 二氧化碳捕集

Abstract: Membranes containing polyether segments may exhibit high CO₂/N₂ separation performance due to strong affinity between polyether segments and CO₂. Membranes with ethylene oxide (EO) groups are widely investigated, but high crystallinity of membranes with EO groups reduces gas permeance of membranes. Compared with EO group, propylene oxide (PO) group possesses an additional side methyl group that prevents crystallization and increases free volume of the membrane, which promotes gas permeance of the membrane. However, preparation of the composite membrane containing PO groups is rarely reported. In this work, composite membranes containing PO groups were prepared by interfacial polymerization with trimesoyl chloride and polyetheramines containing PO groups. The effects of PO group content and degree of cross-linking on separation performance of the membrane were investigated by using D400, D230 or T403 as the monomer in the aqueous phase. The membrane prepared with D400 exhibited the highest CO₂ permeance and CO₂/N₂ selectivity due to its high PO group content and low degree of cross-linking. Moreover, the effects of monomer concentration, acid acceptor, and pH of the aqueous phase on separation performance of the membranes were also investigated. The high-performance membrane containing PO groups was prepared by optimizing the preparation conditions.

Key words: membrane, separation, solubility selectivity, interfacial polymerization, CO₂ capture

中图分类号:

TQ028.8

何文娟, 王志, 李雯, 李诗纯, 王纪孝. 界面聚合制备含丙烯氧基团的复合膜用于CO₂分离[J]. 化工学报, 2014, 65(11): 4420-4429.

HE Wenjuan, WANG Zhi, LI Wen, LI Shichun, WANG Jixiao. Interfacially polymerized composite membranes containing propylene oxide groups for CO₂ separation[J]. CIESC Journal, 2014, 65(11): 4420-4429.

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界面聚合制备含丙烯氧基团的复合膜用于CO₂分离

Interfacially polymerized composite membranes containing propylene oxide groups for CO₂ separation

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