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In situ Generation of Reticulate Micropores through Covalent Network/Polymer Nanocomposite Membranes for Reverse‐Selective Separation of Carbon Dioxide

Abstract

We demonstrate the synthesis of a microporous covalent‐network membrane derived from co‐continuous blends of a porogenic urea network and a polyimide (PI). We show that the urea networks in the PI matrix may be thermally rearranged while selectively expelling small molecular fragments, thereby forming a new network bearing reticular microporous molecular pathways. The porous structures enable reverse‐selective gas separation, efficiently blocking carbon dioxide to which most polymeric membranes exhibit selective permeability. The proposed method for fabricating microporous organic membranes with highly tunable porosities using a variety of chemical structures and processing parameters is facile and shows promise for the creation of new membrane‐based molecular‐separation techniques.

Vernetzte mikroporöse Kanäle entstehen in einem Harnstoff‐basierten Film durch selektives Austreiben von Molekülfragmenten in einem thermischen Behandlungsschritt. Die Nanoverbundmembranen transportieren verschiedene Gase, nicht aber Kohlendioxid.

Authors:   Eunkyung Jeon, Su‐Young Moon, Jae‐Sung Bae, Ji‐Woong Park
Journal:   Angewandte Chemie
Year:   2015
Pages:   n/a
DOI:   10.1002/ange.201508367
Publication date:   10-Dec-2015
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