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Preparation of stable, transparent superhydrophobic film via one step one pot sol-gel method

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Abstract

Herein, we report a single step and a one pot by using spin coating method for the preparation of optically transparent superhydrophobic TEOS-silica composite films. Silica sols were prepared by keeping the molar ratio of TEOS/CH3OH/H2O (0.1 M NH4F) constant at 1:33.15:6.06, respectively. Increasing the silica content of the coating solution resulted in decreasing the transparency of the composite films from 93 to 84% (in references to 93% transmission defined by a plain glass substrate). The static water and hexadecane contact angle of transparent surfaces were found to vary between 65° and 170° (sliding angle < 3°) and 45° to 5° (sliding angle = 15°) depending on the silica content. The stability of the surface remained nearly constant for several months under stored at ambient conditions. The mechanical stability of the prepared of TEOS-silica composite was tested by scratching and adhesive tape test. For the chemical test applications, NaOH, HCl, and H2SO4 were used for the TEOS-silica composite films.

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Acknowledgements

The authors gratefully acknowledge the financial support from The Scientific and Technological Research Council of Turkey (TUBITAK) under the project “Fabrication of self cleaning oil repellent glass and ceramic surfaces” (Project No. MAG-114M475). The authors would like to thank Central Laboratory of Canakkale Onsekiz Mart University for providing SEM, AFM, and FTIR.

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Authors and Affiliations

  1. Department of Bioengineering & Materials Science Engineering, Canakkale Onsekiz Mart University, 17010, Canakkale, Turkey

    Ayse Senem Kaya Topcu, Edanur Erdogan & Ugur Cengiz

  2. Department of Chemical Engineering, Faculty of Engineering, Canakkale Onsekiz Mart University, 17010, Canakkale, Turkey

    Ugur Cengiz

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  1. Ayse Senem Kaya Topcu
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  2. Edanur Erdogan
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  3. Ugur Cengiz
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Correspondence to Ugur Cengiz.

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Topcu, A.S.K., Erdogan, E. & Cengiz, U. Preparation of stable, transparent superhydrophobic film via one step one pot sol-gel method. Colloid Polym Sci 296, 1523–1532 (2018). https://doi.org/10.1007/s00396-018-4377-9

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  • DOI: https://doi.org/10.1007/s00396-018-4377-9

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