Contact
    Start Publications Oxidant-Induced High-Efficient Mussel-Inspired Modification on ...
    ←  Publication Finder
    Attension

    Oxidant-Induced High-Efficient Mussel-Inspired Modification on PVDF Membrane with Superhydrophilicity and Underwater Superoleophobicity Characteristics for Oil/Water Separation

    Year: 2017

    Journal: ACS Appl. Mater. Interfaces, Volume 9, nov-08, page 8297–8307

    Authors: Luo, Chongdan; Liu, Qingxia

    Organizations: Natural Sciences and Engineering Research Council of Canada (NSERC); Canadian Centre for Clean Coal/Carbon and Mineral Processing Technologies (C5MPT); Canada Foundation for Innovation (CFI); Alberta Advanced Education & Technology Small Equipment Grants Program (AET/SEGP)

    Keywords: polydopamine; microfiltration; superhydrophilicity; underwater superoleophobicity; oil/water separation

    In this work, a facile one-step approach was developed to modify hydrophobic polyvinylidene fluoride (PVDF) microfiltration membrane with superhydrophilicity and underwater superoleophobicity properties via a high-efficient deposition of polydopamine (PDA) coating oxidized by sodium periodate in a slightly acidic environment (pH = 5.0). In contrast to the traditional PDA coating on hydrophobic membranes autoxidized by O-2 in a weak basic buffer solution, the superhydrophilicity and ultrahigh pure water permeability (about 11 934 L m(-2) h(-1) under 0.038 MPa) of the PDA-decorated PVDF membrane are derived from optimized chemical oxidation without postmoclifications or additional reactants. The as-prepared membrane exhibits excellent oil/water separation ability evaluated by water fluxes and oil rejection ratios of various oil/water mixtures and oil-in-water emulsions. Moreover, the outstanding antifouling performance and reusability of the PDA-modified PVDF membrane provide a long-term durability for many potential applications. The modified membrane also exhibits excellent chemical stability in harsh pH environments and mechanical stability for practical applications.
    View publication