Polyethersulfone flat sheet and hollow fiber membranes from solutions in ionic liquids

Handle URI:
http://hdl.handle.net/10754/625090
Title:
Polyethersulfone flat sheet and hollow fiber membranes from solutions in ionic liquids
Authors:
Kim, Dooli ( 0000-0003-4137-0350 ) ; Vovusha, Hakkim; Schwingenschlögl, Udo ( 0000-0003-4179-7231 ) ; Nunes, Suzana Pereira ( 0000-0002-3669-138X )
Abstract:
We fabricated flat-sheet and hollow fiber membranes from polyethersulfone (PES) solutions in two ionic liquids: 1-ethyl-3-methylimidazolium diethyl phosphate ([EMIM]DEP) and 1,3-dimethylimidazolium dimethyl phosphate ([MMIM]DMP). The solvents are non-volatile and less toxic than organic solvents, such as dimethylformamide (DMF). The membranes morphologies were compared with those of membranes prepared from solutions in DMF, using electron microscopy. Water permeance, solute rejection and mechanical strengths were evaluated. Membranes were applied to DNA separation. While membranes based on PES were successfully prepared, polysulfone (PSf) does not dissolve in the same ionic liquids. The discrepancy between PES and PSf could not be explained using classical Flory-Huggins theory, which does not consider the coulombic contributions in ionic liquids. The differences in solubility could be understood, by applying density functional theory to estimate the interaction energy between the different polymers and solvents. The theoretical results were supported by experimental measurements of intrinsic viscosity and dynamic light scattering (DLS).
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Physical Sciences and Engineering (PSE) Division
Citation:
Kim D, Vovusha H, Schwingenschlögl U, Nunes SP (2017) Polyethersulfone flat sheet and hollow fiber membranes from solutions in ionic liquids. Journal of Membrane Science 539: 161–171. Available: http://dx.doi.org/10.1016/j.memsci.2017.06.001.
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
10-Jun-2017
DOI:
10.1016/j.memsci.2017.06.001
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/S0376738817303496
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Doolien
dc.contributor.authorVovusha, Hakkimen
dc.contributor.authorSchwingenschlögl, Udoen
dc.contributor.authorNunes, Suzana Pereiraen
dc.date.accessioned2017-06-21T06:42:08Z-
dc.date.available2017-06-21T06:42:08Z-
dc.date.issued2017-06-10en
dc.identifier.citationKim D, Vovusha H, Schwingenschlögl U, Nunes SP (2017) Polyethersulfone flat sheet and hollow fiber membranes from solutions in ionic liquids. Journal of Membrane Science 539: 161–171. Available: http://dx.doi.org/10.1016/j.memsci.2017.06.001.en
dc.identifier.issn0376-7388en
dc.identifier.doi10.1016/j.memsci.2017.06.001en
dc.identifier.urihttp://hdl.handle.net/10754/625090-
dc.description.abstractWe fabricated flat-sheet and hollow fiber membranes from polyethersulfone (PES) solutions in two ionic liquids: 1-ethyl-3-methylimidazolium diethyl phosphate ([EMIM]DEP) and 1,3-dimethylimidazolium dimethyl phosphate ([MMIM]DMP). The solvents are non-volatile and less toxic than organic solvents, such as dimethylformamide (DMF). The membranes morphologies were compared with those of membranes prepared from solutions in DMF, using electron microscopy. Water permeance, solute rejection and mechanical strengths were evaluated. Membranes were applied to DNA separation. While membranes based on PES were successfully prepared, polysulfone (PSf) does not dissolve in the same ionic liquids. The discrepancy between PES and PSf could not be explained using classical Flory-Huggins theory, which does not consider the coulombic contributions in ionic liquids. The differences in solubility could be understood, by applying density functional theory to estimate the interaction energy between the different polymers and solvents. The theoretical results were supported by experimental measurements of intrinsic viscosity and dynamic light scattering (DLS).en
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/S0376738817303496en
dc.subjectPolymer solution thermodynamicsen
dc.subjectPolyethersulfoneen
dc.subject[EMIM]DEPen
dc.subject[MMIM]DMPen
dc.subjectHollow fibersen
dc.subjectPolymeric membranesen
dc.subjectDNA separationen
dc.subjectIonic liquidsen
dc.subjectDensity functional theoryen
dc.titlePolyethersulfone flat sheet and hollow fiber membranes from solutions in ionic liquidsen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Membrane Scienceen
kaust.authorKim, Doolien
kaust.authorVovusha, Hakkimen
kaust.authorSchwingenschlögl, Udoen
kaust.authorNunes, Suzana Pereiraen
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