The effects of a co-solvent on fabrication of cellulose acetate membranes from solutions in 1-ethyl-3-methylimidazolium acetate

Handle URI:
http://hdl.handle.net/10754/621447
Title:
The effects of a co-solvent on fabrication of cellulose acetate membranes from solutions in 1-ethyl-3-methylimidazolium acetate
Authors:
Kim, Dooli ( 0000-0003-4137-0350 ) ; Le, Ngoc Lieu ( 0000-0002-4634-7267 ) ; Nunes, Suzana Pereira ( 0000-0002-3669-138X )
Abstract:
Ionic 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
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Kim 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.
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
15-Aug-2016
DOI:
10.1016/j.memsci.2016.08.015
Type:
Article
ISSN:
0376-7388
Sponsors:
The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S037673881630374X
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Doolien
dc.contributor.authorLe, Ngoc Lieuen
dc.contributor.authorNunes, Suzana Pereiraen
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.en
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. © 2016en
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S037673881630374Xen
dc.rightsArchived with thanks to the Journal of Membrane Science.en
dc.subjectCellulose acetateen
dc.subjectCo-solventen
dc.subjectIonic liquidsen
dc.subjectKineticsen
dc.subjectSolubility parameteren
dc.subjectThermodynamicsen
dc.titleThe effects of a co-solvent on fabrication of cellulose acetate membranes from solutions in 1-ethyl-3-methylimidazolium acetateen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalJournal of Membrane Scienceen
dc.eprint.versionPost-printen
kaust.authorKim, Doolien
kaust.authorLe, Ngoc Lieuen
kaust.authorNunes, Suzana Pereiraen

Version History

VersionItem Editor Date Summary
2 10754/621447grenzdm2016-12-13 06:14:11.706Accepted manuscript received from Prof. Nunes.
1 10754/621447.1grenzdm2016-11-03 08:29:32.0
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