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Angew Chem Int Ed Engl. 2018 Dec 3;57(49):16056-16061. doi: 10.1002/anie.201809126. Epub 2018 Nov 11.

Functionalized Boron Nitride Nanosheets: A Thermally Rearranged Polymer Nanocomposite Membrane for Hydrogen Separation.

Author information

1
Department of Chemical Engineering, Monash University, Clayton, Victoria, 3800, Australia.
2
Department of Energy Engineering, Hanyang University, Seoul, 04763, Korea.
3
Department of Material Science and Engineering, Monash University, Clayton, Victoria, 3800, Australia.
4
Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria, 3800, Australia.

Abstract

Amino functionalized boron nitride nanosheets (FBN) were incorporated into a crosslinked, thermally rearranged polyimide (XTR) to fabricate FBN-XTR nanocomposite membrane. The FBN-XTR membrane exhibited a small decrease in H2 permeability but demonstrated a remarkably increased H2 gas selectivity over other gases, compared with XTR. The XTR membrane heat-treated at 425 °C had a H2 permeability of 210 Barrers and a H2 /CH4 separation factor of 24.1, whereas the nanocomposite membrane with 1 wt % FBN exhibited a H2 permeability of 110 Barrers and H2 /CH4 separation factor of 275, an order of magnitude greater. At 1 wt % FBN loading, the FBN-XTR membrane showed three times higher tensile strength and 60 % higher elongation than pristine XTR membrane. In addition, FBN-XTR was found to be able to be readily processed into thin-film membranes for practical H2 separation applications.

KEYWORDS:

boron nitride nanosheets; gas separation; membranes; polymers

PMID:
30417489
DOI:
10.1002/anie.201809126

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