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Overcoming the “Upper Bound” in Polymeric Gas‐Separation Membranes
Author(s) -
Seo Yongsok,
Hong Seong Uk,
Lee BonSoo
Publication year - 2003
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.200390301
Subject(s) - thermotropic crystal , imide , selectivity , gas separation , materials science , composite number , polymer , ether , membrane , polymer chemistry , chemical engineering , polymer science , composite material , organic chemistry , liquid crystalline , chemistry , catalysis , biochemistry , engineering
Liquid crystals to the rescue : A remarkably increased selectivity for the separation of a binary gas pair (O 2 /N 2 ) by a composite polymer film is reported. The composite film is made of a thermotropic liquid‐crystalline polymer dispersed in a poly(ether imide) and a compatibilizer (poly(ester imide)). The limit imposed by what was previously considered to be an upper bound is overcome (see graph; ◊ the new composite film; the other symbols are values that were obtained for other films; α =selectivity).