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    Self-Assembled Asymmetric Block Copolymer Membranes: Bridging the Gap from Ultra- to Nanofiltration

    250795.pdf (2.107Mb)
    Access Status
    Open access
    Authors
    Yu, H.
    Qiu, X.
    Moreno, N.
    Ma, Z.
    Calo, Victor
    Nunes, S.
    Peinemann, K.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Yu, H. and Qiu, X. and Moreno, N. and Ma, Z. and Calo, V. and Nunes, S. and Peinemann, K. 2015. Self-Assembled Asymmetric Block Copolymer Membranes: Bridging the Gap from Ultra- to Nanofiltration. Angewandte Chemie - International Edition. 54 (47): pp. 13937-13941.
    Source Title
    Angewandte Chemie - International Edition
    DOI
    10.1002/anie.201505663
    ISSN
    1433-7851
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/51323
    Collection
    • Curtin Research Publications
    Abstract

    The self-assembly of block copolymers is an emerging strategy to produce isoporous ultrafiltration membranes. However, thus far, it has not been possible to bridge the gap from ultra- to nanofiltration and decrease the pore size of self-assembled block copolymer membranes to below 5 nm without post-treatment. It is now reported that the self-assembly of blends of two chemically interacting copolymers can lead to highly porous membranes with pore diameters as small as 1.5 nm. The membrane containing an ultraporous, 60 nm thin separation layer can fully reject solutes with molecular weights of 600 g mol-1 in aqueous solutions with a water flux that is more than one order of magnitude higher than the permeance of commercial nanofiltration membranes. Simulations of the membrane formation process by dissipative particle dynamics (DPD) were used to explain the dramatic observed pore size reduction combined with an increase in water flux.

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