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Thermally stable and transparent superhydrophobic sol–gel coatings by spray method

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Abstract

A facile method was developed for the fabrication of the methyltriethoxysilane based transparent and superhydrophobic coating on glass substrates. The transparent and hydrophobic coatings were deposited on the glass substrates, using spray deposition method followed by surface modification process. A spray deposition method generates hierarchical morphology and post surface modification with monofunctional trimethylchlorosilane decreases the surface free energy of coating. These combined effects of synthesis produces bio-inspired superhydrophobic surface. The deposited coating surface shows high optical transparency, micro-nano scale hierarchical structures, improved hydrophobic thermal stability, static water contact angle of about 167° ± 1°, low sliding angle about 2° ± 1° and stable superhydrophobic nature. This paper provides the very simple sol–gel approach to the fabrication of optically transparent, thermally stable superhydrophobic coating on glass substrates. This fabrication strategy may easily extend to the industrial scale up and high-technology fields.

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Acknowledgments

It is a great pleasure to thank The Department of Atomic Energy (DAE), Board of Research in Atomic Energy (DAE) Board of Research in Nuclear Science (BRNS) Mumbai, Government of India, for financial support for this Work No. 2008/37/47/BRNS). Mr. Satish A. Mahadik also thank to the University Grant Commission (UGC), New Delhi, Government of India, for providing “UGC Research Fellowship in Sciences for Meritorious Students”.

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Authors and Affiliations

  1. Air Glass Laboratory, Department of Physics, Shivaji University, Kolhapur, 416004, Maharashtra, India

    Satish A. Mahadik, D. B. Mahadik, M. S. Kavale, V. G. Parale & A. V. Rao

  2. Applied Physics Division, Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400085, Maharashtra, India

    P. B. Wagh & Satish C. Gupta

  3. G. S. Science College, Belgaum, Karnataka, India

    N. D. Hegde

  4. Surface Engineering Division, CSIR-National Aerospace Laboratories, Bangalore, 560017, India

    Harish C. Barshilia

Authors
  1. Satish A. Mahadik
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  2. D. B. Mahadik
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  3. M. S. Kavale
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  4. V. G. Parale
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  5. P. B. Wagh
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  6. Harish C. Barshilia
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  7. Satish C. Gupta
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  8. N. D. Hegde
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  9. A. V. Rao
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Corresponding author

Correspondence to A. V. Rao.

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Mahadik, S.A., Mahadik, D.B., Kavale, M.S. et al. Thermally stable and transparent superhydrophobic sol–gel coatings by spray method. J Sol-Gel Sci Technol 63, 580–586 (2012). https://doi.org/10.1007/s10971-012-2798-3

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  • DOI: https://doi.org/10.1007/s10971-012-2798-3

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