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Issue 9, 2015
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Fabrication of MMMs with improved gas separation properties using externally-functionalized MOF particles

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Abstract

Mixed matrix membranes (MMM) have the potential to overcome the limitations of traditional polymeric membranes for gas separation by improving both the permeability and selectivity. The most difficult challenge is accessing defect free and optimized MMM membranes. Defects are generally due to incompatible interfaces between the polymer and the filler particle. Herein, we present a new approach to modify and optimize the surface of UiO-66-NH2 based MOF particles to improve its interaction with Matrimid® polymer. A series of surface modified UiO-66-NH2 particles were synthesized and characterized using 1H NMR spectroscopy, mass spectrometry, XPS, and powder X-ray diffraction. MMMs containing surface optimized MOF particles exhibit improved thermal and mechanical properties. Most importantly, the MMMs show significantly enhanced gas separation properties; CO2 permeability was increased by ∼200% and CO2/N2 ideal selectivity was increased by ∼25%. These results confirm the success of the proposed technique to mitigate defective MOF/Matrimid® interfaces.

Graphical abstract: Fabrication of MMMs with improved gas separation properties using externally-functionalized MOF particles

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Publication details

The article was received on 01 Oct 2014, accepted on 24 Jan 2015 and first published on 27 Jan 2015


Article type: Paper
DOI: 10.1039/C4TA05225K
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J. Mater. Chem. A, 2015,3, 5014-5022

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    Fabrication of MMMs with improved gas separation properties using externally-functionalized MOF particles

    S. R. Venna, M. Lartey, T. Li, A. Spore, S. Kumar, H. B. Nulwala, D. R. Luebke, N. L. Rosi and E. Albenze, J. Mater. Chem. A, 2015, 3, 5014
    DOI: 10.1039/C4TA05225K

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