Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 344, Issue 1-2, Pages 190-198Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2009.07.051
Keywords
Mixed matrix membranes; Metal-organic frameworks; Solvent resistant nanofiltration
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Funding
- MIP-project
- IAP - FS2
- Generalitat de Catalunya
- FWO Vlaanderen (Research Foundation-Flanders)
- CECAT excellence
- Flemish Government
- Federal Government for an IPA grant
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The incorporation of metal-organic frameworks (MOFs) as fillers in polyclimethylsiloxane (PDMS) membranes was investigated. Mixed matrix membranes (MMMs) with MCFs [Cu-3(BTC)(2)], MIL-47, MIL-53(Al) and ZIF-8 as dispersed phases were synthesized and characterized. The membranes were applied in solvent resistant nanofiltration (SRNF), more in particular in the separation of Rose Bengal (RB) from isopropanol. The membranes showed increased permeance but lower retention compared to unfilled membranes. Membranes were characterized with scanning electron microscopy (SEM) where poor adhesion of the fillers to PDMS was observed. Chemical modification of the fillers with N-methyl-N-(trimethylsilyl)-trifluoroacetamide (MSTFA) allowed synthesis of defect-free membranes with higher retention of RB, due to good interaction with fillers and decreased membrane swelling. (C) 2009 Elsevier B.V. All rights reserved.
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