The significant adhesion enhancement of Ag-polytetrafluoroethylene antibacterial coatings by using of molecular bridge

Ruijie Guo (Lead / Corresponding author), Guangda Yin, Xiaojuan Sha, Qi Zhao, Liqiao Wei, Huifang Wang

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    Weak adhesion between the metal-based antibacterial coatings and polymer substrates limits their clinical applications; surface modification is an effective way to solve this intrinsic problem. In this study, UV irradiation was employed to activate the inert silicon rubber substrates, and the grafting of coupling agent (3-mercaptopropyl) trimethoxy silane into the UV-irradiated substrates generated reactive surface containing SH groups. During electroless plating S which has lone pair electrons anchored Ag+ and produced antibacterial coatings with improved adhesion. The grafting of (3-mercaptopropyl) trimethoxy silane into silicon rubber was verified by X-ray photoelectron spectroscopy (XPS). The adhesion was tested by American Society of Testing Materials (ASTM D 3359-02). Surface elements content and distribution were observed and analyzed by X-ray energy disperse spectroscopy (EDS). The antibacterial performance was characterized by inhibition halo test and shake flash method. The results showed that the as-prepared composite Ag-polytetrafluoroethylene coatings possessed remarkably enhanced adhesion and superior antibacterial activity.

    Original languageEnglish
    Pages (from-to)13-18
    Number of pages6
    JournalApplied Surface Science
    Volume341
    Early online date6 Mar 2015
    DOIs
    Publication statusPublished - 30 Jun 2015

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    Keywords

    • Adhesion
    • Ag-PTFE
    • Antibacterial
    • Coatings
    • Surface modification

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