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Title: ZIF-90/P84 mixed matrix membranes for pervaporation dehydration of isopropanol
Authors: Hua, D.
Ong, Y.K. 
Wang, Y.
Yang, T.
Chung, T.-S. 
Keywords: Dehydration
Mixed matrix membranes
Zeolitic imidazolate frameworks
Issue Date: 1-Mar-2014
Citation: Hua, D., Ong, Y.K., Wang, Y., Yang, T., Chung, T.-S. (2014-03-01). ZIF-90/P84 mixed matrix membranes for pervaporation dehydration of isopropanol. Journal of Membrane Science 453 : 155-167. ScholarBank@NUS Repository.
Abstract: By modifying the synthesis route, we have synthesized ZIF-90 nanoparticles with an average particle size of 55nm and embedded them into P84 polymeric membranes with excellent dispersion for the dehydration of isopropanol (IPA)/water mixture via pervaporation. The effects of ZIF-90 loading as well as feed temperature on pervaporation performance of the mixed matrix membranes (MMMs) were systematically investigated. The flux of MMMs increases with increasing ZIF-90 loading due to the enhanced fractional free volume, while the separation factor of water/IPA can be maintained at 5432 when the ZIF-90 loading is less than 20wt%, but reduced to 385 when the ZIF-90 loading is 30wt%. Interestingly, the application of sulfonated polyethersulfone (SPES) as a primer to ZIF-90 nanoparticles before fabricating MMMs consisting of 30wt% ZIF-90 recovers the separation factor without sacrificing the flux. The best MMM showed the separation performance with a flux of 109gm-2h-1 and a separation factor of 5668 at 60°C. This encouraging performance suggests a promising future of ZIF-90/P84 composite membranes for the dehydration of IPA via pervaporation process. © 2013 Elsevier B.V.
Source Title: Journal of Membrane Science
ISSN: 03767388
DOI: 10.1016/j.memsci.2013.10.059
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