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Title: Controlled thermal oxidative crosslinking of polymers of intrinsic microporosity towards tunable molecular sieve membranes.
Authors: Song, Qilei
Cao, Shuai
Pritchard, Robyn H
Ghalei, Behnam  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-2848-9138 (unconfirmed)
Al-Muhtaseb, Shaheen A
Terentjev, Eugene M
Cheetham, Anthony K
Sivaniah, Easan  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-7293-8370 (unconfirmed)
Keywords: Chemical sciences
Materials science
Issue Date: 4-Sep-2014
Publisher: Nature Publishing Group
Journal title: Nature communications
Volume: 5
End page: 4813
Abstract: Organic open frameworks with well-defined micropore (pore dimensions below 2 nm) structure are attractive next-generation materials for gas sorption, storage, catalysis and molecular level separations. Polymers of intrinsic microporosity (PIMs) represent a paradigm shift in conceptualizing molecular sieves from conventional ordered frameworks to disordered frameworks with heterogeneous distributions of microporosity. PIMs contain interconnected regions of micropores with high gas permeability but with a level of heterogeneity that compromises their molecular selectivity. Here we report controllable thermal oxidative crosslinking of PIMs by heat treatment in the presence of trace amounts of oxygen. The resulting covalently crosslinked networks are thermally and chemically stable, mechanically flexible and have remarkable selectivity at permeability that is three orders of magnitude higher than commercial polymeric membranes. This study demonstrates that controlled thermochemical reactions can delicately tune the topological structure of channels and pores within microporous polymers and their molecular sieving properties.
Description: 排ガスを膜でキャッチ -空気洗浄技術、実用化に期待-. 京都大学プレスリリース. 2014-09-10.
Rights: © 2014 Macmillan Publishers Limited.
許諾条件により本文は 2015-03-05に公開.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/191074
DOI(Published Version): 10.1038/ncomms5813
PubMed ID: 25186051
Related Link: http://www.kyoto-u.ac.jp/ja/news_data/h/h1/news6/2014/140910_1.htm
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