Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/90390
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dc.titleThickness Dependence of Macrovoid Evolution in Wet Phase-Inversion Asymmetric Membranes
dc.contributor.authorLi, D.
dc.contributor.authorChung, T.-S.
dc.contributor.authorRen, J.
dc.contributor.authorWang, R.
dc.date.accessioned2014-10-09T07:04:42Z
dc.date.available2014-10-09T07:04:42Z
dc.date.issued2004-03-17
dc.identifier.citationLi, D.,Chung, T.-S.,Ren, J.,Wang, R. (2004-03-17). Thickness Dependence of Macrovoid Evolution in Wet Phase-Inversion Asymmetric Membranes. Industrial and Engineering Chemistry Research 43 (6) : 1553-1556. ScholarBank@NUS Repository.
dc.identifier.issn08885885
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/90390
dc.description.abstractFollowing an inspiration from Vogrin et al. (J. Membr. Sci. 2002, 207, 139), we have investigated the thickness dependence of macrovoid evolution during the phase inversion of asymmetric flat membranes and observed, for the first time, a critical structure-transition thickness, Lc, which indicates a transition of the membrane morphology from a spongelike to a fingerlike structure with an increase in membrane thickness. Below L c, the membranes show a fully spongelike cross-sectional structure, whereas above Lc, the membranes exhibit a mainly fingerlike macrovoid structure. Two binary solutions are employed in this study: 20 wt % polyethersulfone/N-methyl-2-pyrrolidone (NMP) and 20 wt % BTDA-MDI/TDI co-polyimide/NMP solutions. Their corresponding critical thicknesses, L c, are 1.5 ± 0.4 and 11 ± 2 μm, respectively.
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.sourcetitleIndustrial and Engineering Chemistry Research
dc.description.volume43
dc.description.issue6
dc.description.page1553-1556
dc.description.codenIECRE
dc.identifier.isiutNOT_IN_WOS
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