Water vapor permeability and competitive sorption in thermally rearranged (TR) membranes

CA Scholes; BD Freeman; SE Kentish

Journal article

Water vapor permeability and competitive sorption in thermally rearranged (TR) membranes

CA Scholes, BD Freeman, SE Kentish

Journal of Membrane Science | Published : 2014

DOI: 10.1016/j.memsci.2014.07.024

Abstract

Thermal rearrangement (TR) of α-hydroxyl-polyimides (PI) into polybenzoxazoles (PBO) produces membranes with improved gas separation properties. In addition, PBO membranes have high thermal and chemical resistance, which is advantageous for many applications because of the presence of condensable vapors, in particular water in the feed gas. Here, PI and TR produced PBO membranes are studied for their water sorption and permeability. The PI precursor was 3,3'-dihydroxy-4,4'-diamino-biphenyl 4,4'-hexafluoroisopropylidene diphthalic anhydride (HAB-6FDA), and its TR conversion is well characterized. It was observed that water sorption into the PI and TR PBO membranes followed a slightly convex s..

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University of Melbourne Researchers

Colin Scholes Author

Sandra Kentish Author

Grants

Funding Acknowledgements

Colin Scholes would like to thank the Australian-American Fulbright Commission for funding. Colin Scholes and Sandra Kentish would like to thank the Cooperative Research Centres, Australian Government Department of Industiy for Greenhouse Gas Technologies (CO2CRC) for support, through the Australian Government Cooperative Research Centre program.