Mechanically Robust Superamphiphobic Ceramic Coatings with Releasable Particle-Capsules

Superamphiphobic surfaces that can keep surface clean even in severe oil pollution environment are attractive for many practical applications. Existing surfaces can achieve characteristics such as good mechanical robustness, environmental durability and water repellency. However, rarely anyone has demonstrated coatings that have mechanical robustness and durable superamphiphobicity fabricated by simple fabrication processes. In this work, we present superamphiphobic robust coatings via one-step spray coating of agglomerates-strengthened, fluoridized silica nanoparticle powders with ceramic binders. By controlling the separation state of nanoparticles imbedded in the coatings, the as-prepared superamphiphobic surfaces possess super liquid-repellency to various low-surface-tension liquids. Moreover, they are durable against physical abrasion of 500 Taber abrasion cycles under a load of 250 g, maintaining super-repellency to oils after enduring comprehensive harsh conditions such as oil immersion, oil mist impact, and sand water stirring. This particle-agglomeration enhanced strategy and the latter release of embedded fluoridized silica nanoparticle to surface to regenerate superamphiphobicity during physical wear offers new insights to development durable superamphiphobic coatings that can endure harsh operation environments.