Ionic polyimide membranes containing Tröger's base: Synthesis, microstructure and potential application in CO2 separation
Ionic polyimide membranes containing Tröger's base: Synthesis, microstructure and potential application in CO2 separation
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含有Tröger碱的离子聚酰亚胺膜：合成、微观结构及其在CO2分离中的潜在应用
DOI：
10.1016/j.memsci.2020.117967
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发表时间：
2020-05
影响因子：
9.5
通讯作者：
Xin Zhao
中科院分区：
文献类型：
--
作者：
Xiaochen Xu;Jingjing Wang;Jie Dong;Hai-Bei Li;Qinghua Zhang;Xin Zhao
为了同时获得高渗透性和高选择性的聚合物气体分离膜，本文通过咪唑部分电离和离子交换反应的有效合成方法合成了一系列含有Tröger碱（TB）单元的新型离子聚酰亚胺。研究了聚酰亚胺主链结构、离子对键合方式和离子种类对制备的离子型聚酰亚胺膜微孔结构、分子堆积行为、力学性能和气体分离性能的影响。我们的结果表明，具有刚性和内置胺结构的TB单元以及特定离子对CO2的外部吸引相互作用通过延迟链堆积和增加CO2亲和力对提高聚酰亚胺膜的渗透性和选择性具有协同作用。通常，通过侧取代双(三氟甲磺酰基)亚胺([TFSI]-)改性制备的离子膜的最大CO2渗透率为90.1Barrer，CO2/CH4和CO2/N2选择性分别为37.5和21.9，比其母体聚酰亚胺膜高约120%。 CO2 渗透性。同时，聚酰亚胺主链中离子的共价整合使膜具有足够的稳定性，并赋予其超过 50 MPa 的拉伸强度，比大多数报道的用于气体分离应用的支撑离子液体膜 (SILM) 的拉伸强度更优越。这项研究拓展了构建用于二氧化碳气体分离的高渗透性聚酰亚胺材料的新方法。
In an attempt to obtain polymeric gas separation membranes simultaneously with high permeability and high selectivity, herein, series of novel ionic polyimides containing Tröger's base (TB) unit have been synthesized following an efficient synthetic methodology including the ionization of imidazole moiety and ion-exchange reaction. The effects of polyimide backbone structure, bonding mode of the ion pair and ion species on microporous structure, molecular packing behavior, mechanical property and gas separation property of the prepared ionic polyimide membranes were investigated. Our results reveal that the incorporated TB unit with rigid and in-built amine structure and an external attractive interaction for CO2of particular ions have a synergistic effect on increasing the permeability and selectivity of polyimide membranes by retarding chain packing and increasing CO2affinity. Typically, the prepared ionic membranes modified by the lateral substituted bis(trifluoromethanesulphonyl)imide ([TFSI]-) show a maximal CO2permeability of 90.1 Barrer with the CO2/CH4and CO2/N2selectivities of 37.5 and 21.9, respectively, which is around 120% higher than that of its parent polyimide membrane in CO2permeability. Meanwhile, the covalent integration of ions in polyimide backbone creates a sufficient stability of the membranes and endows them with tensile strengths of over 50 MPa, more superior than those of most reported supported ionic liquid membranes (SILMs) for gas separation applications. This study extends a new method for constructing high permeable polyimide materials for CO2gas separation.
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DOI：
10.1021/jp1054606
发表时间：
2010-09
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
Dongfang Zhang;Liuming Yan
通讯作者：
Dongfang Zhang;Liuming Yan
影响因子：
9.5
作者：
Soondong Yoo;J. Won;S. Kang;Y. Kang;S. Nagase
通讯作者：
Soondong Yoo;J. Won;S. Kang;Y. Kang;S. Nagase
影响因子：
5.5
作者：
Yongbing Zhuang;J. Seong;Won Hee Lee;Yu Seong Do;Moon Joo Lee;Gang Wang;M. Guiver;Y. Lee
通讯作者：
Yongbing Zhuang;J. Seong;Won Hee Lee;Yu Seong Do;Moon Joo Lee;Gang Wang;M. Guiver;Y. Lee
影响因子：
8.4
作者：
S. Zulfiqar;Daniele Mantione;Omar El Tall;F. Ruipérez;M. Sarwar;A. Rothenberger;D. Mecerreyes
通讯作者：
S. Zulfiqar;Daniele Mantione;Omar El Tall;F. Ruipérez;M. Sarwar;A. Rothenberger;D. Mecerreyes
影响因子：
9.9
作者：
You-In Park;Beom-Sik Kim;Yong-Hoon Byun;S. H. Lee;E. Lee;Jung Min Lee
通讯作者：
You-In Park;Beom-Sik Kim;Yong-Hoon Byun;S. H. Lee;E. Lee;Jung Min Lee