A solution-processable and ultra-permeable conjugated microporous thermoset for selective hydrogen separation

Wei Liu, Shu-Dong Jiang, Youguo Yan, Wensen Wang, Jing Li, Kai Leng, Susilo Japip, Jiangtao Liu, Hai Xu, Yanpeng Liu, In-Hyeok Park, Yang Bao, Wei Yu, Michael D. Guiver (), Sui Zhang () and Kian Ping Loh ()
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Wei Liu: National University of Singapore
Shu-Dong Jiang: National University of Singapore
Youguo Yan: China University of Petroleum
Wensen Wang: China University of Petroleum
Jing Li: National University of Singapore
Kai Leng: National University of Singapore
Susilo Japip: National University of Singapore
Jiangtao Liu: National University of Singapore
Hai Xu: National University of Singapore
Yanpeng Liu: National University of Singapore
In-Hyeok Park: National University of Singapore
Yang Bao: National University of Singapore
Wei Yu: National University of Singapore
Michael D. Guiver: Tianjin University
Sui Zhang: National University of Singapore
Kian Ping Loh: National University of Singapore

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract The synthesis of a polymer that combines the processability of plastics with the extreme rigidity of cross-linked organic networks is highly attractive for molecular sieving applications. However, cross-linked networks are typically insoluble or infusible, preventing them from being processed as plastics. Here, we report a solution-processable conjugated microporous thermoset with permanent pores of ~0.4 nm, prepared by a simple heating process. When employed as a two-dimensional molecular sieving membrane for hydrogen separation, the membrane exhibits ultrahigh permeability with good selectivity for H2 over CO2, O2, N2, CH4, C3H6 and C3H8. The combined processability, structural rigidity and easy feasibility make this polymeric membrane promising for large-scale hydrogen separations of commercial and environmental relevance.

Date: 2020
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DOI: 10.1038/s41467-020-15503-6

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