A COATING BASED ON CROSS-LINkED POLyDIMETHyLSILOXANE AND NANOPARTICLES WITH DIFFERENT MORFOLOGIES FOR SUPERHyDROPHBIC TEXTILE FABRICATION

Abstract

A composition and method for applying a superhydrophobic composite coating for fabrics based on chemically crosslinked polydimethylsiloxane (PDMS), silica nanoparticles (SiO2 NP), composite nanoparticles with “polystyrene core/silica shell structure” and a fluoroalkylsilane (FAS) were proposed. It is shown that the degree of hydrophobicity and durability of the composition are the functions of NP, PDMS and FAS concentration and their ratios. The optimal concentrations of the components for the formation of a coating with a maximum degree of hydrophobicity (water static and sliding contact angle ≈ 170° and 2°, respectively) were determined. It is established that the developed composition is characterized by prolonged wear resistance to various types of abrasive action, heat treatment, exposure to acids and bases. It was experimentally determined that the observed effects are a consequence of the complex influence of all the constituents of the composition.

Keywords

• superhydrophobic coatings
• nanoparticles
• textile materials