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Silver-Enhanced Block Copolymer Membranes with Biocidal Activity
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    Silver-Enhanced Block Copolymer Membranes with Biocidal Activity
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    Water Desalination and Reuse Center and Imaging and Characterization Lab, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Kingdom of Saudi Arabia
    *Suzana P. Nunes. Tel. +966 12 8082771. Email: [email protected]
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    ACS Applied Materials & Interfaces

    Cite this: ACS Appl. Mater. Interfaces 2014, 6, 21, 18497–18501
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    https://doi.org/10.1021/am505594c
    Published October 6, 2014
    Copyright © 2014 American Chemical Society

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    Silver nanoparticles were deposited on the surface and pore walls of block copolymer membranes with highly ordered pore structure. Pyridine blocks constitute the pore surfaces, complexing silver ions and promoting a homogeneous distribution. Nanoparticles were then formed by reduction with sodium borohydride. The morphology varied with the preparation conditions (pH and silver ion concentration), as confirmed by field emission scanning and transmission electron microscopy. Silver has a strong biocide activity, which for membranes can bring the advantage of minimizing the growth of bacteria and formation of biofilm. The membranes with nanoparticles prepared under different pH values and ion concentrations were incubated with Pseudomonas aeruginosa and compared with the control. The strongest biocidal activity was achieved with membranes containing membranes prepared under pH 9. Under these conditions, the best distribution with small particle size was observed by microscopy.

    Copyright © 2014 American Chemical Society

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    ACS Applied Materials & Interfaces

    Cite this: ACS Appl. Mater. Interfaces 2014, 6, 21, 18497–18501
    Click to copy citationCitation copied!
    https://doi.org/10.1021/am505594c
    Published October 6, 2014
    Copyright © 2014 American Chemical Society

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