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dc.contributor.authorKim, Dooli
dc.contributor.authorLe, Ngoc Lieu
dc.contributor.authorNunes, Suzana Pereira
dc.date.accessioned2016-12-13T06:19:42Z
dc.date.available2016-11-03T08:29:32Z
dc.date.available2016-12-13T06:19:42Z
dc.date.issued2016-08-15
dc.identifier.citationKim D, Le NL, Nunes SP (2016) The effects of a co-solvent on fabrication of cellulose acetate membranes from solutions in 1-ethyl-3-methylimidazolium acetate. Journal of Membrane Science 520: 540–549. Available: http://dx.doi.org/10.1016/j.memsci.2016.08.015.
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2016.08.015
dc.identifier.urihttp://hdl.handle.net/10754/621447
dc.description.abstractIonic liquids have been considered green solvents for membrane fabrication. However, the high viscosity of their polymer solutions hinders the formation of membranes with strong mechanical properties. In this study, acetone was explored as a co-solvent with the ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) to dissolve cellulose acetate. The effects of acetone on the thermodynamic and kinetic aspects of the polymer solutions were studied and the physicochemical properties and separation capability of their resultant membranes were analyzed. The Hansen solubility parameters of [EMIM]OAc were measured by the software HSPiP and these data demonstrated that acetone was a suitable co-solvent to increase the solubility of cellulose acetate. The Gibbs free energy of mixing ΔGm was estimated to determine the proper composition of the polymer solution with better solubility. The study of the kinetics of phase separation showed that the demixing rate of the CA polymer solution in acetone and [EMIM]OAc was higher than that for solutions in [EMIM]OAc only. The membranes prepared from the former solution had higher water permeance and better mechanical stability than those prepared from the later solution. Adding acetone as a co-solvent opened the opportunity of fabricating membranes with higher polymer concentrations for higher separation capability and better mechanical properties. © 2016
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S037673881630374X
dc.rightsArchived with thanks to the Journal of Membrane Science.
dc.subjectCellulose acetate
dc.subjectCo-solvent
dc.subjectIonic liquids
dc.subjectKinetics
dc.subjectSolubility parameter
dc.subjectThermodynamics
dc.titleThe effects of a co-solvent on fabrication of cellulose acetate membranes from solutions in 1-ethyl-3-methylimidazolium acetate
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalJournal of Membrane Science
dc.eprint.versionPost-print
kaust.personKim, Dooli
kaust.personLe, Ngoc Lieu
kaust.personNunes, Suzana Pereira
refterms.dateFOA2018-08-15T00:00:00Z
dc.date.published-online2016-08-15
dc.date.published-print2016-12


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