Abstract
Liquid crystals to the rescue: A remarkably increased selectivity for the separation of a binary gas pair (O2/N2) 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).
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