International. Superamphiphobic artificial surfaces have been garnering a lot of attention in recent years to improve durability in practical applications. A new study deals with the preparation of a robust and superamphiphobic film highly resistant to wear by reaction of the self-assembled monolayer surface.
In a new study, the double-sized porous silica compound of micro/nanoparticles and epoxy resin was coated onto the vitreous substrate as a microstructure/nanostructure, then 60 nm porous silica particles modified by 3-aminopropyltriethoxysilane were covered.
The monolayer of surface low-energy fluoride chains was grafted by click reaction of 2 - (((3,3,4,4,5,5,6,6,7,7,8,8,9,9, 10,10,10-heptadecafluorodecyl) -oxy) -methyl) oxyrane with amino groups on the micro surface / nanostructure. The low energy-free chain of perfluorinates and topological characteristics established a super repellent surface. The surface was owned by superamphiphobic with a wide range of liquids (surface tension ranging from 72.0 to 27.2 mNm-1).
Due to the usability of EP and the long perfluorinated chains that automatically migrate from the inner surface of porous silica particles to the new surface, the super-repellent surface not only has the function of self-cleaning as the lotus effect, but also durability, self-healing capabilities and high wear resistance, even after it was heavily scratched by the knife or eroded by sandpaper.
After the superamphiphobic coating had been rubbed, under a weight of 100 g, 40 cycles of sandpaper abrasion, the coating still maintains its contact angles (AC) in water; diiodomethane and ethylene glycol over 155 ± 2 °, and all their sliding angles (SA) less than 2.7 ± 1 °, respectively. These skills are expected to have important practical applications due to their satisfactory long-lasting use in large-scale and outdoor fabrications.
Source: www.sciencedirect.com
