Issue 46, 2020

Rational design of poly(ethylene oxide) based membranes for sustainable CO2 capture

Abstract

Membrane processes have been becoming a promising approach for effective CO2 separation due to their inherent merits such as a small footprint, modifiable separation process, and energy efficiency, while a highly permeable/selective membrane material is the key to achieving excellent CO2 capture performance of membrane processes. Among current membrane materials for CO2 capture, poly(ethylene oxide) (PEO) as a CO2-philic polymer shows great potential because of its inherent dipolar–quadrupolar interaction between ethylene oxide (EO) units and CO2 molecules, whereas pristine PEO membranes typically exhibit low CO2 permeability due to the crystallinity of PEO chains which limit gas transportation. Therefore, this critical review provides a systematic and in-depth understanding of solution–diffusion theory to help design highly efficient PEO membranes for CO2 capture. We have classified various strategies to improve PEO based membrane performance into the following three categories: copolymer membrane, cross-linked membrane, and mixed matrix membrane. Furthermore, a brief perspective on the cruxes of future development and promising directions is presented.

Graphical abstract: Rational design of poly(ethylene oxide) based membranes for sustainable CO2 capture

Article information

Article type
Review Article
Submitted
07 sen 2020
Accepted
30 okt 2020
First published
16 noy 2020

J. Mater. Chem. A, 2020,8, 24233-24252

Rational design of poly(ethylene oxide) based membranes for sustainable CO2 capture

B. Zhu, X. Jiang, S. He, X. Yang, J. Long, Y. Zhang and L. Shao, J. Mater. Chem. A, 2020, 8, 24233 DOI: 10.1039/D0TA08806D

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