TEOS-Based Superhydrophobic Coating for the Protection of Stone-Built Cultural Heritage

Tetraethyl orthosilicate (TEOS) is extensively used in the conservation of stone-built cultural heritage, which often subjected to water-induced degradation processes. The goal this study was produce and a TEOS-based material with ability repel liquid water. A sol solution TEOS 1H,1H,2H,2H-perfluorooctyl triethoxysilane (FAS) prepared deposited on marble. static contact angles (CAs) water drops coated marble surface were >170° sliding (SA) <5°, suggesting that superhydrophobicity repellency achieved synthesized coating. FTIR SEM-EDS employed characterize produced latter offered good protection against penetration by capillarity, reducing breathability only small extent practically no effect its aesthetic appearance. durability coating evaluated through various tests provided very promising results. Finally, versatility method demonstrated as successfully onto glass, brass, wood, silicon, paper silk, obtained extreme wetting properties.