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Updated: Jul 30, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
Covalent and non-covalent approaches to suppress plasticization of polymer membranes for gas separation
Ji Woo Kim1, Jin Hui Jo1, Songah Jeong1
1School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea. wschi@jnu.ac.kr.
Abstract:
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 CO2, 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.
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