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- Title
Enhanced 2-D MOFs nanosheets/PES-g-PEG mixed matrix membrane for efficient CO2 separation.
- Authors
Ma, Yingnan; He, Xingyan; Xu, Shanshan; Yu, Yunfei; Zhang, Chenchen; Meng, Jianqiang; Zeng, Lelin; Tang, Kewen
- Abstract
We report a 2-D MOF nanosheets/PES-PEG mixed matrix membrane, which exhibited greatly enhanced CO 2 permeability and separation performance. [Display omitted] • The porous 2-D MOFs nanosheets were introduced into PES-g-PEG copolymer for fabricating MMMs. • The influence of the contents of 2-D MOFs nanosheets on membrane performance were discussed. • The obtained MMMs exhibited enhanced CO 2 diffusion and solubility thus efficient CO 2 separation performance. • The MOFs nanosheets improved the anti-plasticization capability and operation stability of original membrane. Polymeric materials with polyethylene glycol (PEG) which contains ether oxygen groups are utilized as CO 2 separation membranes due to the high selectivity, while suffered from low gas permeability owing to small free volume. The 2-D MOFs nanosheets showed excellent gas molecules permeance because of the unique pore structure and ultra-high specific surface with nanoscale thickness. In this work, the PES-g-PEG copolymer were prepared by thiol-ene click chemistry, the 2-D MOFs nanosheets were then introduced to fabricate MMMs. Benefitting from the effective transfer of MOFs nanosheets for CO 2 , the obtained MMMs exhibited greatly enhanced CO 2 permeability (4 times higher than original PES-g-PEG membrane) and separation performance (71.7% increase of selectivity for CO 2 /N 2 and 72.6% increase of selectivity for CO 2 /CH 4). In addition, the introduction of 2-D MOFs nanosheets also improved the anti-plasticization capability and operation stability of the original PES-G-PEG membranes, the MMMs exhibited excellent stability for CO 2 separation.
- Subjects
SEPARATION of gases; CARBON dioxide; POROSITY; MEMBRANE separation; CLICK chemistry; POLYETHYLENE glycol
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2022, Vol 180, p79
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2022.02.017