Sol-Gel Synthesis and Study of the Hydrophobicity of Coatings
Prepared Using Modified Aerosils

T. V. Khamova^a, O. A. Shilova^a,b, L. N. Krasil’nikova^a, E. Yu. Ladilina^c, T. S. Lyubova^c,
M. A. Baten’kin^c, and I. Yu. Kruchinina^a,b

^aGrebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034
Russia

e-mail: LTPP@rambler.ru

^bUl’yanov (Lenin) St. Petersburg State Electrotechnical University LETI, ul. prof. Popova 5, St. Petersburg, 197376 Russia

^cRazuvaev Institute of Organometallic Chemistry, ul. Tropinina 49, Nizhny Novgorod, 603950 Russia

Received February 27, 2015

Abstract—Sols based on methyltriethoxysilane have been synthesized. These sols were further used to obtain
film-forming composites through mixing with aerosil powders of various degrees of hydrophobicity. The effect
of ripening of sol-gel systems and the peculiarities of the surface properties of aerosils on the hydrophobicity
of coatings produced based on them have been investigated. It has been revealed that a significant effect on
hydrophobic and superhydrophobic properties is provided by the degree of hydrophobization of the aerosil sur-
face. For composites with fluorine-containing aerosils, the duration of sol-gel systems aging within 40 days
does not significantly affect the properties of the coatings, and the observed deviations are within the measure-
ment errors.

Keywords: sol-gel method, methyltriethoxysilane, aerosil, hydrophobization, hydrophobic coatings, superhy-
drophobic coatings

DOI: 10.1134/S1087659616020085

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