Wetting of isotropic mickrotextures formed on the surface of glass and aluminium
https://doi.org/10.29235/1561-8331-2019-55-3-309-317
Abstract
The paper studies the wetting of aluminum and glass surfaces with disordered roughness created by technologically simple methods: chemical deposition with simultaneous self-organization of nanoparticles on microprotrusions and valleys, as well as the application of thin coatings using polymer-dispersed systems with polymodal particle size distribution. Super-hydrophobic coatings with an edge wetting angle of 160–170° and a wetting hysteresis of no more than 10° on electrochemically nanostructured aluminum, processed by the dispersion with the polymodal distribution of aerosil microparticles, silicon oxide nanoparticles SiDB and carbon nanocomposite SHDB (Nanosintal, Belarus) in fluorinated varnish. The regularities of changes in the wetting angle of silicate glass with the coating of the same varnish with small additives were established, showing its significant growth with an increase in the content of aerosil microparticles and a decrease in the lacquer concentration. The increase in the content of SiDB and SHDB does not significantly affect the contact angle, but it significantly reduces the hysteresis of its wetting, which gives the glass the effect of “lotus”.
Keywords
Varnish,
dispersion,
surface,
texture,
roughness,
isotropy,
superhydrophobic,
wetting angle,
hysteresis,
wetting
About the Authors
V. D. Koshevar
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Vasiliy D. Koshevar – D. Sc. (Chemistry), Professor, Head of the Department of Colloidal Chemistry of Lyophobic Systems
9/1, Surganov Str., 220072, MinskI. P. Kazhuro
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Iryna P. Kazhuro – Ph. D. (Chemistry), Senior Researcher
9/1, Surganov Str., 220072, MinskV. G. Shkadrecova
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Valentine G. Shkadretsova – Researcher
9/1, Surganov Str., 220072, MinskA. S. Pismenskaya
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Alexandra S. Pismenskaya – Junior Researcher
9/1, Surganov Str., 220072, Minsk
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