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

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    Dooli-PES-MAy1-2017-corrected.pdf
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    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Kim, Dooli cc
    Vovusha, Hakkim
    Schwingenschlögl, Udo cc
    Nunes, Suzana Pereira cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Computational Physics and Materials Science (CPMS)
    Environmental Science and Engineering Program
    Material Science and Engineering Program
    Nanostructured Polymeric Membrane Lab
    Physical Science and Engineering (PSE) Division
    Date
    2017-06-10
    Online Publication Date
    2017-06-10
    Print Publication Date
    2017-10
    Permanent link to this record
    http://hdl.handle.net/10754/625111
    
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    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).
    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.
    Sponsors
    The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier BV
    Journal
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2017.06.001
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0376738817303496
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2017.06.001
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS)

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