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    Low fouling polysulfone ultrafiltration membrane via click chemistry

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    Type
    Article
    Authors
    Xie, Yihui cc
    Tayouo Djinsu, Russell
    Nunes, Suzana Pereira cc
    KAUST Department
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2014-10-13
    Permanent link to this record
    http://hdl.handle.net/10754/565991
    
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    Abstract
    Hydrophilic surfaces are known to be less prone to fouling. Ultrafiltration membranes are frequently prepared from rather hydrophobic polymers like polysulfone (PSU). Strategies to keep the good pore forming characteristics of PSU, but with improved hydrophilicity are proposed here. PSU functionalized with 1,2,3-triazole ring substituents containing OH groups was successfully synthesized through click chemistry reaction. The structures of the polymers were confirmed using NMR spectroscopy and Fourier transform infrared spectroscopy (FTIR). High thermal stability (>280°C) was observed by thermal gravimetric analysis. Elemental analysis showed the presence of nitrogen containing triazole group with different degrees of functionalization (23%, 49%, 56%, and 94%). The glass transition temperature shifted with the introduction of triazole pendant groups from 190°C (unmodified) to 171°C. Ultrafiltration membranes were prepared via phase inversion by immersion in different coagulation baths (NMP/water mixtures with volume ratios from 0/100 to 40/60). The morphologies of these membranes were studied by field emission scanning electron microscopy (FESEM). The optimized PSU bearing triazole functions membranes exhibited water permeability up to 187 L m-2 h-1 bar-1, which is 23 times higher than those prepared under the same conditions but with unmodified polysulfone (PSU; 8 L m-2 h-1 bar-1). Results of bovine serum albumin protein rejection test indicated that susceptibility to fouling decreased with the modification, due to the increased hydrophilicity, while keeping high protein rejection ratio (>99%).
    Sponsors
    The work was partially funded by the KAUST Competitive Research Grant program (CRG2).
    Publisher
    Wiley-Blackwell
    Journal
    Journal of Applied Polymer Science
    ISSN
    00218995
    DOI
    10.1002/app.41549
    ae974a485f413a2113503eed53cd6c53
    10.1002/app.41549
    Scopus Count
    Collections
    Articles; Water Desalination and Reuse Research Center (WDRC)

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