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Molecular‐Sieving Membrane by Partitioning the Channels in Ultrafiltration Membrane by In Situ Polymerization
Author(s) -
Shao Pengpeng,
Yao Ruxin,
Li Ge,
Zhang Mengxi,
Yuan Shuai,
Wang Xiaoqi,
Zhu Yuhao,
Zhang Xianming,
Zhang Lin,
Feng Xiao,
Wang Bo
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201913360
Subject(s) - membrane , ultrafiltration (renal) , microporous material , conjugated microporous polymer , materials science , chemical engineering , polymer , polymeric membrane , nanofiltration , polymerization , synthetic membrane , polymer chemistry , nanotechnology , chemistry , chromatography , composite material , engineering , biochemistry
Commercial ultrafiltration membranes have proliferated globally for water treatment. However, their pore sizes are too large to sieve gases. Conjugated microporous polymers (CMPs) feature well‐developed microporosity yet are difficult to be fabricated into membranes. Herein, we report a strategy to prepare molecular‐sieving membranes by partitioning the mesoscopic channels in water ultrafiltration membrane (PSU) into ultra‐micropores by space‐confined polymerization of multi‐functionalized rigid building units. Nine CMP@PSU membranes were obtained, and their separation performance for H 2 /CO 2 , H 2 /N 2 , and H 2 /CH 4 pairs surpass the Robeson upper bound and rival against the best of those reported membranes. Furthermore, highly crosslinked skeletons inside the channels result in the structural robustness and transfer into the excellent aging resistance of the CMP@PSU. This strategy may shed light on the design and fabrication of high‐performance polymeric gas separation membranes.