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|Title:||Electrospun nanofibrous polysulfone membranes as pre-filters: Particulate removal||Authors:||Gopal, R.
|Issue Date:||15-Feb-2007||Citation:||Gopal, R., Kaur, S., Feng, C.Y., Chan, C., Ramakrishna, S., Tabe, S., Matsuura, T. (2007-02-15). Electrospun nanofibrous polysulfone membranes as pre-filters: Particulate removal. Journal of Membrane Science 289 (1-2) : 210-219. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2006.11.056||Abstract:||This paper explores the viability of developing high surface area pre-filters through electrospinning. Pre-filters are regularly used in removing particulate contaminants that can have a deleterious effect on downstream membrane elements such as ultrafiltration and nanofiltration. They should possess high internal surface area and thus sub-micron size fibers are ideal. In this study, polysulfone nanofibers were electrospun into membranes and their ability to remove micro-particles from solution was investigated. The nanofibrous membranes possess high porosity together with high surface area to produce high flux pre-filters with high loading capacity. The membrane had a bubble-point of 4.6 μm and was able to remove above 99% of 10, 8 and 7 μm particles without any permanent fouling. However, the membrane was observed to foul irreversibly by 2 and 1 μm particles with a 'cake-layer' forming on the membrane surface. Below 1 μm, the membrane behaved as a depth filter with 0.5 and 0.1 μm particles being attracted onto the nanofiber surface. This study highlights that nanofibers do have potential as pre-filters for particulate removal. Such nanofibrous pre-filters can be used in various applications such as removal of micro-particles from waste-water, prior to ultrafiltration or nanofiltration membranes, to prolong the life of these membranes. © 2006 Elsevier B.V. All rights reserved.||Source Title:||Journal of Membrane Science||URI:||http://scholarbank.nus.edu.sg/handle/10635/60152||ISSN:||03767388||DOI:||10.1016/j.memsci.2006.11.056|
|Appears in Collections:||Staff Publications|
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