Hydrogen separation via polymer membranes is hindered by low selectivity and weakmechanical strength. In this study, the authors present an ionic cross-linked polymer film, formed using layer-by-layer assembly of a branched polyethylenimine and poly(acrylic acid), capable of combining exceptionally high hydrogen selectivity with remarkable mechanical properties at gas permeabilities in excess of the traditional �upper bound� associated with homogeneous polymeric membranes. The excellent performance of hydrogen selectivity and mechanical strength represents a significantbreakthrough in the realization of low-cost, highly manufacturable polymer membranes for hydrogen purification.

Highly size-selective ionically crosslinked multilayer polymer films for light gas separation

247th National Meeting (2014)

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