Covalent and non-covalent approaches to suppress plasticization of polymer membranes for gas separation

Polymer membranes represent an attractive platform for energy-efficient gas separation, but they are known to suffer from plasticization during continuous gas-separation processes. This phenomenon is caused by the spontaneous relaxation of individual polymer chains arising from the swelling effect i...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2023-06, Vol.59 (46), p.6987-73
Main Authors: Kim, Ji Woo, Jo, Jin Hui, Jeong, Songah, Chi, Won Seok, Kim, Hyungwoo
Format: Article
Language:English
Subjects:
Covalence
Gas separation
Membranes
Polymers
Pressure effects
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Summary:Polymer membranes represent an attractive platform for energy-efficient gas separation, but they are known to suffer from plasticization during continuous gas-separation processes. This phenomenon is caused by the spontaneous relaxation of individual polymer chains arising from the swelling effect induced by high-pressure highly soluble gases such as CO 2 , and it weakens the stability of the membrane, leading to a significant loss of selectivity during the separation of mixed gases. Thus, minimizing the disadvantages of polymer membranes is essential to ensure reliable gas-separation performance for practical applications. This feature article summarizes the theory underlying the plasticization of polymer membranes and introduces covalent and non-covalent approaches to suppress plasticization behaviour on a molecular level. This article introduces chemical approaches to alleviate plasticization of polymer membranes, an inevitable and detrimental effect on gas separation process.
ISSN:1359-7345
1364-548X
DOI:10.1039/d3cc01003a