Polymeric molecular sieve membranes via in situ cross-linking of non-porous polymer membrane templates

Zhen-An Qiao (), Song-Hai Chai, Kimberly Nelson, Zhonghe Bi, Jihua Chen, Shannon M. Mahurin, Xiang Zhu and Sheng Dai ()
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Zhen-An Qiao: Oak Ridge National Laboratory
Song-Hai Chai: Oak Ridge National Laboratory
Kimberly Nelson: University of Tennessee
Zhonghe Bi: Oak Ridge National Laboratory
Jihua Chen: Oak Ridge National Laboratory
Shannon M. Mahurin: Oak Ridge National Laboratory
Xiang Zhu: University of Tennessee
Sheng Dai: Oak Ridge National Laboratory

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract High-performance polymeric membranes for gas separation are attractive for molecular-level separations in industrial-scale chemical, energyand environmental processes. Molecular sieving materials are widely regarded as the next-generation membranes to simultaneously achieve high permeability and selectivity. However, most polymeric molecular sieve membranes are based on a few solution-processable polymers such as polymers of intrinsic microporosity. Here we report an in situ cross-linking strategy for the preparation of polymeric molecular sieve membranes with hierarchical and tailorable porosity. These membranes demonstrate exceptional performance as molecular sieves with high gas permeabilities and selectivities for smaller gas molecules, such as carbon dioxide and oxygen, over larger molecules such as nitrogen. Hence, these membranes have potential for large-scale gas separations of commercial and environmental relevance. Moreover, this strategy could provide a possible alternative to ‘classical’ methods for the preparation of porous membranes and, in some cases, the only viable synthetic route towards certain membranes.

Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4705

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DOI: 10.1038/ncomms4705

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