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Surface functionalized UiO-66/Pebax-based ultrathin composite hollow fiber gas separation membranes

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Abstract

Pebax-based composite hollow fibre membranes are promising candidates for industrial gas separation, but their application is limited by the inherent separation performance of the polymeric materials and the poor operational stability especially under elevated pressures. The incorporation of metal–organic frameworks (MOFs) has been extensively investigated as a potential solution to these problems. However, the major challenges are to control the microvoids in the interfacial region and to improve the effective MOF loading within the selective layer. In this work, we applied a zirconium-based rigid MOF (UiO-66) to fabricate a nanocomposite hollow fibre membrane, and (–COOH) and (–NH2) modified UiO-66 were applied to investigate the effect of surface functionalization. Up to 80 wt% UiO-66 was incorporated into the thin Pebax selective layer, and both improved CO2 permeance and selectivity were obtained simultaneously with the (–NH) functionalized UiO-66. In addition, the presence of UiO-66 in Pebax significantly improved the membrane's operational stability under high pressure.

Graphical abstract: Surface functionalized UiO-66/Pebax-based ultrathin composite hollow fiber gas separation membranes

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Publication details

The article was received on 25 Aug 2017, accepted on 01 Nov 2017 and first published on 02 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA07512J
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Surface functionalized UiO-66/Pebax-based ultrathin composite hollow fiber gas separation membranes

    P. D. Sutrisna, J. Hou, M. Y. Zulkifli, H. Li, Y. Zhang, W. Liang, Deanna M. D'Alessandro and V. Chen, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA07512J

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