Study and Development of Superhydrophobic Coatings Based
on Silicon Dioxide
A. S. Drinberga, *, G. K. Ivakhnyuka, T. E. Mametnabieva, and G. R. Nedvedskiia
a St. Petersburg State Technological Institute (Technical University), St. Petersburg, 190013 Russia
Correspondence to: *e-mail: drinberg@mail.ru
Received 1 March, 2021
Abstract—It is found that the chemical composition of the surface cannot fully provide superhydrophobicity, as a combination of a hydrophobic material with an appropriate surface texture is required. It is determined that to create a superhydrophobic coating (SHC), it is necessary that the liquid on the surface be in the Cassie–Baxter state. SHCs with an ordered microstructured surface are developed. It is found that the size of the asperities of such a surface should not be larger than 20 μm.
Keywords: superhydrophobic coatings (SHCs), contact angle, Young angle, surface energy, Wenzel state, Cassie–Baxter state, lotus effect, microstructured surface, aerosil method
DOI: 10.1134/S1087659622010035