Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.memsci.2011.03.016
Title: Molecular design of the morphology and pore size of PVDF hollow fiber membranes for ethanol-water separation employing the modified pore-flow concept
Authors: Sukitpaneenit, P.
Chung, T.-S. 
Keywords: Ethanol-water separation
Membrane morphology
Pervaporation
Pore size and pore size distribution
PVDF hollow fiber membranes
Issue Date: 15-May-2011
Citation: Sukitpaneenit, P., Chung, T.-S. (2011-05-15). Molecular design of the morphology and pore size of PVDF hollow fiber membranes for ethanol-water separation employing the modified pore-flow concept. Journal of Membrane Science 374 (1-2) : 67-82. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2011.03.016
Abstract: In this study, we have established the fundamental science and engineering of fabricating poly(vinylidene fluoride) (PVDF) asymmetric hollow fiber membranes for ethanol-water separation and elucidated the complicated relationship among membrane morphology, pore size, pore size distribution and separation performance using the concept of the modified pore-flow model proposed in our previous work. The variation of bore-fluid composition, air-gap distance and take-up speed results in membranes with various morphologies ranging from large-finger-like macrovoid to nearly perfect macrovoid-free structures. Interestingly, an increase in air-gap distance or take-up speed not only effectively suppress the formation of macrovoids but also results in the reduction of membrane pore size and the narrowing of pore size distribution, hence leading to the enhancement of membrane performance. The permeation flux is found to be mainly controlled by the overall porosity and the contribution of large pore sizes of the membrane, while the selectivity or separation factor is greatly determined by membrane pore size and pore size distribution, which is consistent with the modified pore-flow model proposed in our previous works. The newly developed PVDF asymmetric hollow fiber membranes demonstrates remarkable high fluxes of 3500-8800gm-2h-1 and reasonable ethanol-water separation factors of 5-8 compared to existing polymeric-based pervaporation membranes. © 2011 Elsevier B.V.
Source Title: Journal of Membrane Science
URI: http://scholarbank.nus.edu.sg/handle/10635/89471
ISSN: 03767388
DOI: 10.1016/j.memsci.2011.03.016
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

47
checked on Jul 13, 2018

WEB OF SCIENCETM
Citations

42
checked on Jun 12, 2018

Page view(s)

37
checked on May 18, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.