TY  - JOUR
AU  - Luo, Shuangjiang
AU  - Han, Tianliang
AU  - Wang, Can
AU  - Sun, Ying
AU  - Zhang, Hongjun
AU  - Guo, Ruilan
AU  - Zhang, Suojiang
PY  - 2023
TI  - Hierarchically microporous membranes for highly energy-efficient gas separations
JO  - Industrial Chemistry & Materials
SN  - 2755-2608
SP  - 376
EP  - 387
VL  - 1
IS  - 3
AB  - The implementation of synthetic polymer membranes in gas separations, ranging from natural gas sweetening, hydrogen separation, helium recovery, carbon capture, oxygen/nitrogen enrichment, etc., has stimulated the vigorous development of high-performance membrane materials. However, size-sieving types of synthetic polymer membranes are frequently subject to a trade-off between permeability and selectivity, primarily due to the lack of ability to boost fractional free volume while simultaneously controlling the micropore size distribution. Herein, we review recent research progress on microporosity manipulation in high-free-volume polymeric gas separation membranes and their gas separation performance, with an emphasis on membranes with hourglass-shaped or bimodally distributed microcavities. State-of-the-art strategies to construct tailorable and hierarchically microporous structures, microporosity characterization, and microcavity architecture that govern gas separation performance are systematically summarized.
UR  - https://doi.org/10.1039/d2im00049k
DO  - 10.1039/d2im00049k