Fabrication of Superhydrophobic Nanocomposite Coatings Using Polytetrafluoroethylene and Silica Nanoparticles | Zendy

Bharathibai J. Basu | Zendy; Vipin Kumar | Zendy

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Fabrication of Superhydrophobic Nanocomposite Coatings Using Polytetrafluoroethylene and Silica Nanoparticles

Author(s) -

Bharathibai J. Basu,

Vipin Kumar

Publication year - 2011

Publication title -

isrn nanotechnology

Language(s) - English

Resource type - Journals

eISSN - 2090-6072

pISSN - 2090-6064

DOI - 10.5402/2011/803910

Subject(s) - contact angle , materials science , polytetrafluoroethylene , nanocomposite , superhydrophobic coating , coating , scanning electron microscope , composite material , nanoparticle , fabrication , nanoscopic scale , surface energy , emulsion , chemical engineering , nanotechnology , medicine , alternative medicine , pathology , engineering

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.

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