Fabrication of a Superhydrophobic SiO₂ Coating with Anticorrosive Protection

Abstract

In this work, the carbon steel matrix obtained a silane coupling agent (KH550) modified rough SiO2 coating, covering it by dip‐coating method. The modified SiO2 (K‐SiO2) coating on the carbon steel was coated with stearic acid (STA) and adjusted the proportion of SiO2 nanoparticles and KH550 to achieve the more perfect superhydrophobic sample. It turns out that SiO2 particles were evenly disturbuted and linked together by KH550 to form a stable structure. The K‐SiO2 coating liquid was further added a modifier of STA to achieve low surface energy, and then developed a durable and corrosion resistant coating. The superhydrophobic coating liquid was coated on the carbon steel to obtain a multifunctional superhydrophobic coating (contact angle=163°, rolling angle=1.4°), having excellent self‐cleaning, adhension, durability and corrosion resistance.

Siloxane-Modified UV-Curable Castor-Oil-Based Waterborne Polyurethane Superhydrophobic Coatings

“…In order to further enhance the hydrophobic performance of coatings, some researchers have incorporated modified nanoparticles, such as TiO 2 , ZnO, and SiO 2 nanoparticles [19,20], into silicone-containing polyurethane resins, resulting in rough surfaces with micro-and nanostructures like those on the surface of lotus leaves [21], which makes these coatings superhydrophobic. Zhou et al [22] obtained a superhydrophobic coating with a contact angle of 163 • and a roll angle of 1.4 • by using a silane coupling agent to modify rough SiO 2 and covering it on a substrate by dip-coating method, which was in turn coated with stearic acid. Wooden products are used in a wide range of applications.…”

“…In this study, inspired by the hydrophobic effect of hydroxyl-terminated polydimethylsiloxane (OH−PDMS) and micro-nanoscale heptadecafluorodecyltrimethoxysilane-modified SiO 2 particles (FAS−SiO 2 ) [10,15,22], these were introduced simultaneously into the castoroil-based waterborne polyurethane emulsion to elicit superhydrophobicity through the synergistic effect. This waterborne polyurethane system was originally derived from biomass and was stable without phase separation.…”