Customizing the surface charge of thin-film composite membranes by surface plasma thin film polymerization

Rackel Reis, Mikel Duke, Andrea Merenda, Bjorn Winther Jensen, Ljiljana Puskar, Mark J. Tobin, John D. Orbell, Ludovic F. Dumée

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Solute-surface interactions are critical in membrane science and dominate a number of diffusion and selectivity parameters. In water treatment particularly, the charge on the membrane has been shown to affect ion transport selectivity as well as fouling mechanisms. The development of advanced surface technologies that allow for potential customization of the surface charge for specific applications, without compromising the essential performance of the membrane, is therefore desirable. In this paper, a novel plasma polymerization strategy was applied to commercial reverse osmosis membrane in order to tune the surface charge. Two monomers, maleic anhydride and vinylimidazole, were plasma polymerized onto the membrane resulting in a modification of the surface energy with resultant isoelectric points of approximately pH 3 and pH 7 respectively. This required only a short 5 min plasma polymerization treatment in each case. Thus, in addition to enhancing the water permeation by up to 10%, in comparison to the reference membranes, the overall charge of the membranes was shifted from highly negatively charged upon maleic anhydride polymerization to highly positively charged upon vinylimidazole polymerization. A comprehensive morphological and chemical analysis was performed to correlate the changes to the presence of functional groups and the alteration of the surface texture. Short treatments were found to smooth the surface whilst enriching the surface with either carboxylic or amine/amide groups. This work opens new avenues to engineer advanced membranes with improved performance and selectivity.

    Original languageEnglish
    Pages (from-to)1-10
    Number of pages10
    JournalJournal of Membrane Science
    Volume537
    DOIs
    Publication statusPublished - 2017 Sep 1

    Fingerprint

    Composite membranes
    Surface charge
    Polymerization
    polymerization
    Cell Membrane
    membranes
    Membranes
    Plasmas
    Thin films
    composite materials
    thin films
    Maleic Anhydrides
    Plasma polymerization
    Maleic anhydride
    selectivity
    anhydrides
    Osmosis membranes
    Osmosis
    reverse osmosis
    Reverse osmosis

    Keywords

    • Charge control
    • Plasma polymerization
    • Surface deposition
    • Thin film composite membranes

    ASJC Scopus subject areas

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

    Cite this

    Customizing the surface charge of thin-film composite membranes by surface plasma thin film polymerization. / Reis, Rackel; Duke, Mikel; Merenda, Andrea; Winther Jensen, Bjorn; Puskar, Ljiljana; Tobin, Mark J.; Orbell, John D.; Dumée, Ludovic F.

    In: Journal of Membrane Science, Vol. 537, 01.09.2017, p. 1-10.

    Research output: Contribution to journalArticle

    Reis, Rackel ; Duke, Mikel ; Merenda, Andrea ; Winther Jensen, Bjorn ; Puskar, Ljiljana ; Tobin, Mark J. ; Orbell, John D. ; Dumée, Ludovic F. / Customizing the surface charge of thin-film composite membranes by surface plasma thin film polymerization. In: Journal of Membrane Science. 2017 ; Vol. 537. pp. 1-10.
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