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    Cellulose hollow fibers for organic resistant nanofiltration

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    Gheorghe Paper-revized-april 29-nontrack.pdf
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    Embargo End Date:
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    2021-05-07
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    Type
    Article
    Authors
    Falca, Gheorghe
    Musteata, Valentina-Elena
    Behzad, Ali Reza
    Chisca, Stefan
    Nunes, Suzana Pereira cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Electron Microscopy
    Environmental Science and Engineering
    Environmental Science and Engineering Program
    KAUST Grant Number
    REP/1/3848-01-01
    URF/1/3441-01-01
    Date
    2019-05-08
    Online Publication Date
    2019-05-08
    Print Publication Date
    2019-09
    Embargo End Date
    2021-05-07
    Permanent link to this record
    http://hdl.handle.net/10754/656228
    
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    Abstract
    Cellulose is the most abundant biopolymer, but it is difficult to process due to its low solubility in most of the solvents. In this work, we demonstrate the preparation, of self-standing and defect-free cellulose hollow fiber membranes made by a sustainable process for filtration in organic solvent medium. The hollow fibers were made by the simple spinning technique using ionic liquids as a solvent. The spun solutions were prepared with three different ionic liquids, having imidazolium-based cations and acetate or phosphates as anions. We used X-ray diffraction to evaluate the influence of the different ionic liquids on the crystallinity of the cellulose and the membrane solvent stability. We used cryo-scanning electron microscopy to investigate the porous structure of the hydrated membranes, distinguishing it from that of the dry membranes. The hollow fiber membrane performance was studied using dyes in water and ethanol solutions. The rejection of Congo Red (696 g mol−1) was higher than 90% in ethanol and even closer to 100% in water. The best results were obtained by using 1-ethyl-3-methyimidazolium diethyl phosphate and 1,3-dimethylimidazolium dimethyl phosphate. Our results indicate that by using greener process is possible to obtain solvent resistant cellulose hollow fibers.
    Citation
    Falca, G., Musteata, V.-E., Behzad, A. R., Chisca, S., & Nunes, S. P. (2019). Cellulose hollow fibers for organic resistant nanofiltration. Journal of Membrane Science, 586, 151–161. doi:10.1016/j.memsci.2019.05.009
    Sponsors
    The work was sponsored by the King Abdullah University of Science and Technology, grant REP/1/3848-01-01 and URF/1/3441-01-01.
    Publisher
    Elsevier BV
    Journal
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2019.05.009
    Additional Links
    https://www.sciencedirect.com/science/article/pii/S0376738819305290
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2019.05.009
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program

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