Development and evaluation of electroless Ag-PTFE composite coatings with anti-microbial and anti-corrosion properties

Q. Zhao, Y. Liu, C. Wang

    Research output: Contribution to journalArticle

    69 Citations (Scopus)

    Abstract

    Electroless Ag-polytetrafluoroethylene (PTFE) composite coatings were prepared on stainless steel sheets. The existence and distribution of PTFE in the coatings were analysed with an energy dispersive X-ray microanalysis (EDX). The contact angle values and surface energies of the Ag-PTFE coatings, silver coating, stainless steel, titanium and E. coli Rosetta were measured. The experimental results showed that stainless steel surfaces coated with Ag-PTFE reduced E. coli attachment by 94–98%, compared with silver coating, stainless steel or titanium surfaces. The anti-bacterial mechanism of the Ag-PTFE composite coatings was explained with the extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The anticorrosion properties of the Ag-PTFE composite coatings in 0.9% NaCl solution were studied. The results showed that the corrosion resistance of the Ag-PTFE composite coatings was superior to that of stainless steel 316L.
    Original languageEnglish
    Pages (from-to)1620-1627
    Number of pages8
    JournalApplied Surface Science
    Volume252
    Issue number5
    DOIs
    Publication statusPublished - 2005

    Keywords

    • Electroless deposition
    • Composite coating
    • Ag-PTFE
    • Adhesion
    • Corrosion

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