Please use this identifier to cite or link to this item: https://doi.org/10.1039/c8ta10333j
Title: Highly efficient CO2 capture by mixed matrix membranes containing three-dimensional covalent organic framework fillers
Authors: Cheng, Youdong 
Zhai, Linzhi
Ying, Yunpan 
Wang, Yuxiang 
Liu, Guoliang 
Dong, Jinqiao 
Ng, Denise ZL 
Khan, Saif A 
Zhao, Dan 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Chemistry
Materials Science
ENHANCED GAS SEPARATION
INTRINSIC MICROPOROSITY
POLYMERS
PERFORMANCE
NANOSHEETS
TRANSPORT
SELECTIVITY
STABILITY
Issue Date: 7-Mar-2019
Publisher: ROYAL SOCIETY OF CHEMISTRY
Citation: Cheng, Youdong, Zhai, Linzhi, Ying, Yunpan, Wang, Yuxiang, Liu, Guoliang, Dong, Jinqiao, Ng, Denise ZL, Khan, Saif A, Zhao, Dan (2019-03-07). Highly efficient CO2 capture by mixed matrix membranes containing three-dimensional covalent organic framework fillers. JOURNAL OF MATERIALS CHEMISTRY A 7 (9) : 4549-4560. ScholarBank@NUS Repository. https://doi.org/10.1039/c8ta10333j
Abstract: © 2019 The Royal Society of Chemistry. Mixed matrix membranes (MMMs) have long been considered as promising membrane types for industrial energy-intensive gas separation processes. Current MMMs are still facing grand challenges of poor filler dispersion and poor polymer-filler interfacial compatibility. The present study demonstrates that these challenges can be addressed by fabricating MMMs containing three-dimensional (3D) covalent organic framework (COF) fillers with ultrasmall size-selective pores. Two different polymer matrixes, including glassy 6FDA-DAM and rubbery Pebax, are explored to validate the effectiveness of 3D COF fillers in improving the membrane separation performance. The pure organic nature of COFs facilitates their high affinity with pure organic polymer matrixes, leading to good interfacial compatibility in the resultant MMMs. These porous COF-300 fillers can increase the membrane fractional free volume that enhances the membrane gas permeability. Besides, the ultrasmall pores of COF-300 fillers and the rigidified polymer chains at the filler surface can enhance the size discriminative processes, resulting in increased membrane gas pair selectivity. Moreover, the separation performance of COF-300 can be further improved by functionalizing it with polyethylenimine (PEI), enabling the design of advanced membranes suitable for industrial applications.
Source Title: JOURNAL OF MATERIALS CHEMISTRY A
URI: https://scholarbank.nus.edu.sg/handle/10635/169834
ISSN: 20507488
20507496
DOI: 10.1039/c8ta10333j
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