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Issue 17, 2017
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Shear-aligned graphene oxide laminate/Pebax ultrathin composite hollow fiber membranes using a facile dip-coating approach

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Abstract

Graphene oxide (GO) has been considered as a promising candidate for molecular separation because of its capability to form highly efficient gas flow intergalleries. However, a major challenge is the lack of a facile, scalable, low-cost membrane fabrication approach, especially for the hollow fiber composite membrane with a thin selective layer. By using a facile dip-coating technique, we prepared a shear-aligned GO/Pebax composite hollow fiber membrane on a porous polymeric support. The incorporation of the aligned GO laminates significantly improved the original Pebax (polyethylene oxide–polyamide block copolymer) membrane permeance without compromising the CO2/N2 selectivity, and the composite membrane had good operational stability and enhanced mechanical strength. We further investigated the formation mechanism of the shear-aligned GO structure and discovered that the control of the withdrawal speed and liquid film thickness was a key factor. This dip-coating technique offers significant opportunities to exploit the GO-based membrane for industrial CO2 capture.

Graphical abstract: Shear-aligned graphene oxide laminate/Pebax ultrathin composite hollow fiber membranes using a facile dip-coating approach

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Publication details

The article was received on 03 Dec 2016, accepted on 01 Mar 2017 and first published on 01 Mar 2017


Article type: Communication
DOI: 10.1039/C6TA10395B
Citation: J. Mater. Chem. A, 2017,5, 7732-7737
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    Shear-aligned graphene oxide laminate/Pebax ultrathin composite hollow fiber membranes using a facile dip-coating approach

    Y. Zhang, Q. Shen, J. Hou, P. D. Sutrisna and V. Chen, J. Mater. Chem. A, 2017, 5, 7732
    DOI: 10.1039/C6TA10395B

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