Molecular Engineering of Copoly(ionic liquids)-Based Membranes for CO2 Separation

被引:2
|
作者
Zhang, Manman [1 ,2 ]
Chen, Liu [1 ,2 ]
Wang, Kaifang [1 ,2 ]
Lin, Ruitao [1 ,2 ]
Xiao, Zeshen [1 ,2 ]
Semiat, Raphael [1 ]
He, Xuezhong [1 ,2 ,3 ]
机构
[1] Technion, Israel Inst Technol, Wolfson Dept Chem Engn, IL-3200003 Haifa, Israel
[2] Guangdong Technion, Israel Inst Technol, Dept Chem Engn, Shantou 515063, Guangdong, Peoples R China
[3] Guangdong Technion, Israel Inst Technol, Guangdong Prov Key Lab Mat & Technol Energy Conver, Shantou 515063, Guangdong, Peoples R China
关键词
copoly(ionic liquids); molecular engineering; composite membranes; CO2; separation; permeance; CO2/N-2; selectivity; POLY(IONIC LIQUID)S; TRANSPORT; CO2/N-2; PERMEABILITY; ENHANCEMENT; SELECTIVITY; ADSORPTION; POLYMERS; CO2/CH4;
D O I
10.1021/acsapm.3c02713
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The development of materials has given rise to the study and design of poly(ionic liquid)s (PILs) for making CO2-selective membranes. The huge design space for the chemical structures of PILs provides great opportunities to further investigate the factors underlying gas permeability and selectivity. Herein, copolymerizing imidazolium-based ionic liquid (IL) monomers with two functionalized monomers of acrylamide (AM) and butyl acrylate (BA) based on free radical polymerization was conducted, and the effect of the chemical structures for PIL-based copolymers on their performances of derived membranes for CO2/N-2 separation was evaluated. Nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy analysis confirmed the successful synthesis of copoly(ionic liquids) (co-PILs) with the designed chemical structures. The co-PIL-based composite membranes were fabricated by coating the copolymer solutions on the surface of a commercial polysulfone (PSF) membrane. It was found that the best composite membranes present significantly enhanced CO2 permeance (76 GPU) and CO2/N-2 selectivity (53) by 262% and 61% compared to pure PSF membranes. The proposed coating method using co-PILs provides a facile solution to improve the CO2 separation membrane performance. Therefore, molecular engineering of the chemical structures for poly(ionic liquids) opens a venue to develop high-performance co-PIL-based membranes for potential CO2 capture from flue gases.
引用
收藏
页码:1853 / 1863
页数:11
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