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Issue 24, 2014
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Fabrication of hybrid polymer/metal organic framework membranes: mixed matrix membranes versus in situ growth

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Abstract

Hybrid polymer/metal organic framework (MOF) membranes have been prepared using either a mixed matrix membrane (MMM) or in situ growth (ISG) approach and were evaluated for application in organic solvent nanofiltration (OSN). MMMs were produced by dispersing pre-formed particles of the MOF HKUST-1 in polyimide P84 dope solutions. MMMs demonstrated both (i) higher rejections of styrene oligomers and (ii) lower flux decline than the polymeric control membranes. Furthermore, an alternative hybrid membrane fabrication methodology – in situ growth (ISG) of HKUST-1 in integrally skinned asymmetric polymer membrane supports – has been successfully demonstrated. Ultrafiltration support membranes were submerged in HKUST-1 precursor solutions in order to promote the growth of MOF within the porous structure of the polymer membranes. The presence of HKUST-1 in the membranes was proven with X-ray powder diffraction (XRPD). Energy-dispersive X-ray spectroscopy (EDX) was used to reveal the distribution of HKUST-1 throughout the ISG membranes, and was found to be even across the surface and throughout the cross-section. The ISG membranes also had higher solute rejections and lower flux decline than the MMMs.

Graphical abstract: Fabrication of hybrid polymer/metal organic framework membranes: mixed matrix membranes versus in situ growth

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Article information


Submitted
05 Feb 2014
Accepted
22 Apr 2014
First published
23 Apr 2014

J. Mater. Chem. A, 2014,2, 9260-9271
Article type
Paper
Author version available

Fabrication of hybrid polymer/metal organic framework membranes: mixed matrix membranes versus in situ growth

J. Campbell, G. Székely, R. P. Davies, D. C. Braddock and A. G. Livingston, J. Mater. Chem. A, 2014, 2, 9260
DOI: 10.1039/C4TA00628C

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