On the Fabrication of Hydrophobic Coatings by Polycondensation of Fluoroalkylalkoxysilanes

V. A. Benderskii; Бендерский В. А.; I. P. Kim; Ким И. П.; N. N. Dremova; Дремова Н. Н.

doi:10.31857/S0023119323020055

On the Fabrication of Hydrophobic Coatings by Polycondensation of Fluoroalkylalkoxysilanes

Authors: Benderskii V.A.¹, Kim I.P.¹, Dremova N.N.¹
Affiliations:
1. Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences
Issue: Vol 57, No 2 (2023)
Pages: 120-124
Section: НАНОРАЗМЕРНЫЕ СИСТЕМЫ И МАТЕРИАЛЫ
URL: https://rjsvd.com/0023-1193/article/view/661516
DOI: https://doi.org/10.31857/S0023119323020055
EDN: https://elibrary.ru/NGQLTX
ID: 661516

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Abstract

It has been shown that for obtaining hydrophobic coatings, it is reasonable to use fluoroalkylalkoxysilanes (FASs) with a longer fluoroalkyl chain than FAS-19, so that the F/Si molar ratio exceeds 5–6. It is proposed to purposefully change not only the chain length of oligomers, but also the structure of solutions from dilute colloidal solutions to structured gels, with the F/Si ratio being controlled. In the case of polycondensation of investigated fluoroalkylalkoxysilanes on a hydroxylated surface, a strong silicone framework is formed, which is chemically bonded to the surface and to fluoroalkyl chains oriented perpendicular to it

Keywords

fluoroalkylalkoxysilanes, hydrolysis, polycondensation, F/Si molar ratio, hydrophobicity

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