Layer-by-layer surface modification of polyethersulfone membranes using polyelectrolytes and AgCl/TiO2 xerogels

Papatya Kaner, Daniel J. Johnson, Erol Seker, Nidal Hilal, Sacide Alsoy Altinkaya

    Research output: Contribution to journalArticle

    Abstract

    In this study, the layer-by-layer (LbL) assembly method was employed to modify a commercial polyethersulfone (PES) membrane by successive adsorption of chitosan and alginate as cationic and anionic polyelectrolytes. To enhance anti-biofouling property, pure, PEG mixed and PEGylated AgCl/TiO2 xerogels were incorporated solely in the top layer of the LbL-modified membranes. Organic and biological foulings were addressed separately using alginate and Escherichia coli bacteria suspensions as the organic and biological model foulants, respectively. LbL-modifying the commercial PES membrane successively with chitosan and alginate polyelectrolyte multilayers prevented organic fouling extensively. In addition, we found that AgCl/TiO2-incorporated membranes show higher water permeability and improved resistance to biological fouling as compared to the PES membrane. Silver amounts in consecutively collected permeate samples were quantified by ICP-MS analysis to assess the stability of AgCl/TiO2-incorporated layers. Silver loss per filtration cycle followed an increasing trend initially, up to a filtration volume totaling 3000 L/m2, leading to 4.2% reduction in the immobilized silver amount. After that, silver loss per filtration cycle stabilized at ~7.44 μg/L, which extrapolates to ~265 days time-span for the remaining silver to be released at a filtration rate of ~1000 L/m2 h. Antibacterial activity tests showed that AgCl/TiO2-incorporated layers do not permit bacterial growth on the membrane surface.

    Original languageEnglish (US)
    Pages (from-to)807-819
    Number of pages13
    JournalJournal of Membrane Science
    Volume493
    DOIs
    StatePublished - Nov 1 2015

    Fingerprint

    Xerogels
    xerogels
    Polyelectrolytes
    Surface treatment
    surface layers
    Silver
    membranes
    Membranes
    Alginate
    Fouling
    silver
    fouling
    Chitosan
    Biofouling
    Biological Models
    Escherichia coli
    Polyethylene glycols
    Adsorption
    bionics
    polyether sulfone

    Keywords

    • Antifouling
    • Layer by layer assembly
    • Silver xerogel
    • Ultrafiltration membrane
    • Water treatment

    ASJC Scopus subject areas

    • Biochemistry
    • Materials Science(all)
    • Physical and Theoretical Chemistry
    • Filtration and Separation

    Cite this

    Layer-by-layer surface modification of polyethersulfone membranes using polyelectrolytes and AgCl/TiO2 xerogels. / Kaner, Papatya; Johnson, Daniel J.; Seker, Erol; Hilal, Nidal; Altinkaya, Sacide Alsoy.

    In: Journal of Membrane Science, Vol. 493, 01.11.2015, p. 807-819.

    Research output: Contribution to journalArticle

    Kaner, Papatya ; Johnson, Daniel J. ; Seker, Erol ; Hilal, Nidal ; Altinkaya, Sacide Alsoy. / Layer-by-layer surface modification of polyethersulfone membranes using polyelectrolytes and AgCl/TiO2 xerogels. In: Journal of Membrane Science. 2015 ; Vol. 493. pp. 807-819.
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