Improved reverse osmosis thin film composite biomimetic membranes by incorporation of polymersomes

Radosław Pawel Górecki*, Dennis Maik Reurink, Muntazim Munir Khan, Victoria Sanahuja-Embuena, Krzysztof Trzaskuś, Claus Hélix-Nielsen

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    Biomimetic aquaporin-based membranes offer great promise as a disruptive water treatment technology, due to their potential of improving membrane permeability without compromising solute rejection. However, fabrication upscaling is challenging and therefore the technological potential of biomimetic membranes remains unused. We propose an easily upscalable process based on bulk hydration of diblock and triblock copolymer mixture for preparation of polymersomes which can reconstitute aquaporin proteins. Such polymersomes are incorporated into biomimetic membranes via polyamide active layer synthesis based on interfacial polymerization. By incorporation of blank polymersomes, it was possible to improve water permeability of the membrane by 30%, and by incorporation of aquaporin reconstituting polymersomes by 50%, compared to the membranes without polymersomes. In both cases NaCl rejection was not affected. X-ray photoelectron spectroscopy measurements confirmed incorporation of copolymers prepared with aquaporins into the active polyamide layer without affecting the thickness of the membrane's active layer and surface zeta-potential.
    Original languageEnglish
    Article number117392
    JournalJournal of Membrane Science
    Volume593
    Number of pages7
    ISSN0376-7388
    DOIs
    Publication statusPublished - 2020

    Keywords

    • Aquaporin
    • Block copolymers
    • Polymersomes
    • Interfacial polymerization
    • Biomimetic membrane

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