Molecular Engineering of Copoly(ionic liquids)-Based Membranes for CO2 Separation
Source abstract
Abstract
The development of materials has given rise to the study and design of poly(ionic liquid)s (PILs) for making CO 2 -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 CO 2 /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 CO 2 permeance (76 GPU) and CO 2 /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 CO 2 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 CO 2 capture from flue gases.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Membrane Separation and Gas Transport · Ionic liquids properties and applications · Covalent Organic Framework Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemical Engineering, Guangdong Technion−Israel Institute of Technology, 241 Daxue Road, Shantou, Guangdong 515063, China
The Wolfson Department of Chemical Engineering, Technion− Israel Institute of Technology, Haifa 3200003, Israel
Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion, Guangdong Technion−Israel Institute of Technology, Shantou, Guangdong 515063, China
Funding
High-end Foreign Experts Recruitment Plan of China · Science, Technology and Innovation Commission of Shenzhen Municipality
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