Fabrication of Superhydrophobic Nanocomposite Coatings Using Polytetrafluoroethylene and Silica Nanoparticles

Bharathibai, Basu J and Dinesh Kumar, V (2011) Fabrication of Superhydrophobic Nanocomposite Coatings Using Polytetrafluoroethylene and Silica Nanoparticles. International Scholarly Reserch Network ISRN Nanotechnology, 2011 . pp. 1-6.

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    Abstract

    Superhydrophobic nanocomposite coatings were fabricated by incorporating hydrophobically modified silica (HMS) nanoparticles in polytetrafluoroethylene (PTFE) emulsion. Hydrophobicity of the coating was dependent on the concentration of HMS. Coatings containing optimum amounts of PTFE and HMS exhibited superhydrophobic property with high water contact angle (WCA) of 165◦ and low sliding angle <2◦. Scanning electron microscopic (SEM) studies have shown a binary surface topography composed of microbumps and nanoscale granules. The synergistic effect of the micro-nano-binary structure and low surface energy of PTFE was responsible for the superhydrophobicity of the coating. The method is simple and cost-effective and can be used for preparing self-cleaning superhydrophobic coatings on large areas of different kinds of substrates like glass, metal, and composites.

    Item Type: Journal Article
    Uncontrolled Keywords: Fabrication of Superhydrophobic Nanocomposite, Silica Nanoparticles, Polytetrafluoroethylene
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Surface Engineering Division, Surface Engineering Division
    Depositing User: Ms Indrani V
    Date Deposited: 24 Aug 2011 14:17
    Last Modified: 24 Aug 2011 14:17
    URI: http://nal-ir.nal.res.in/id/eprint/9921

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