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    Ethylene glycol as bore fluid for hollow fiber membrane preparation

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    Lieu_EG as bore fluid-corrected.pdf
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    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Le, Ngoc Lieu cc
    Nunes, Suzana Pereira cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2017-03-31
    Online Publication Date
    2017-03-31
    Print Publication Date
    2017-07
    Permanent link to this record
    http://hdl.handle.net/10754/623831
    
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    Abstract
    We proposed the use of ethylene glycol and its mixture with water as bore fluid for the preparation of poly(ether imide) (PEI) hollow fiber membranes and compared their performance and morphology with membranes obtained with conventional coagulants (water and its mixture with the solvent N-methylpyrrolidone (NMP)). Thermodynamics and kinetics of the systems were investigated. Water and 1:1 water:EG mixtures lead to fast precipitation rates. Slow precipitation is observed for both pure EG and 9:1 NMP:water mixture, but the reasons for that are different. While low osmotic driving force leads to slow NMP and water transport when NMP:water is used, the high EG viscosity is the reason for the slow phase separation when EG is the bore fluid. The NMP:water mixture produces fibers with mixed sponge-like and finger-like structure with large pores in the inner and outer layers; and hence leading to a high water permeance and a high MWCO suitable for separation of large-sized proteins. As compared to NMP:water, using EG as bore fluid provides fibers with a finger-like bilayered structure and sponge-like layers near the surfaces, and hence contributing to the higher water permeance. It also induces small pores for better protein rejection.
    Citation
    Le NL, Nunes SP (2017) Ethylene glycol as bore fluid for hollow fiber membrane preparation. Journal of Membrane Science 533: 171–178. Available: http://dx.doi.org/10.1016/j.memsci.2017.03.045.
    Sponsors
    The work was supported by King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier BV
    Journal
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2017.03.045
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0376738817304520
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2017.03.045
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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