Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.memsci.2010.08.034
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dc.titleEffects of annealing on the microstructure and performance of cellulose acetate membranes for pressure-retarded osmosis processes
dc.contributor.authorSu, J.
dc.contributor.authorZhang, S.
dc.contributor.authorChen, H.
dc.contributor.authorChen, H.
dc.contributor.authorJean, Y.C.
dc.contributor.authorChung, T.-S.
dc.date.accessioned2014-10-09T06:46:30Z
dc.date.available2014-10-09T06:46:30Z
dc.date.issued2010-11-15
dc.identifier.citationSu, J., Zhang, S., Chen, H., Chen, H., Jean, Y.C., Chung, T.-S. (2010-11-15). Effects of annealing on the microstructure and performance of cellulose acetate membranes for pressure-retarded osmosis processes. Journal of Membrane Science 364 (1-2) : 344-353. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2010.08.034
dc.identifier.issn03767388
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/88804
dc.description.abstractThe effects of annealing on the microstructure and performance of cellulose acetate (CA) forward osmosis (FO) hollow fiber membranes have been studied. The mean pore radius decreases from 0.63nm to 0.39, 0.36, 0.30 and 0.30 upon annealing at 70, 80, 85 and 90°C, respectively. The density of free volume in the depth range of 0.31-1.33μm significantly decreases with depth with annealing at 80°C. Annealing causes the shrinkage of both the voids between nodule aggregates and the spaces between intra-molecular chain segments. At depths greater than 0.31μm, the amount of large cavities increases for all the membranes and its increase are greater for the membranes annealed at 85 and 90°C. The free volume radius and total free volume at a depth of 0.1μm increase with increasing annealing temperature. The amount of free volume at 0.1μm depth slightly decreases upon annealing at 70 and 80°C but increases upon annealing at higher temperatures. In the pressure-retarded osmosis (PRO) process, the CA membrane annealed at 80°C exhibits the highest water flux of 30.98Lm-2h-1 (LMH) with a salt leakage of 0.37gm-2h-1 (gMH) using 2.0M MgCl2 as the draw solution. © 2010 Elsevier B.V.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.memsci.2010.08.034
dc.sourceScopus
dc.subjectAnnealing
dc.subjectCellulose acetate
dc.subjectFree volume
dc.subjectPressure-retarded osmosis
dc.subjectWater flux
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.doi10.1016/j.memsci.2010.08.034
dc.description.sourcetitleJournal of Membrane Science
dc.description.volume364
dc.description.issue1-2
dc.description.page344-353
dc.description.codenJMESD
dc.identifier.isiut000283972100039
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