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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.

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


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.


boron nitride nanosheets; gas separation; membranes; polymers


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