Facile fabrication of wear-resistant multifunctional surfaces on titanium alloy substrate by one-step anodization and modification with silicon dioxide nanoparticles

摘要

This paper describes a simple, facile, low-cost method of fabricating a wear-resistant surface on titanium alloy substrates by single-step anodization and modification with silicon dioxide particles. The method produced a TiO2-SiO2 composite surface with micro- to nanohierarchical structure, which became multifunctional after fluoroalkylsilane modification. The surface not only showed excellent superhydrophobicity [contact angles (CAs) > 150A degrees, sliding angles (SAs) aecurrency sign 8A degrees] but also exhibited better repellency of complex whole blood (CAs = 153A degrees +/- 2A degrees, SAs = 9A degrees). Furthermore, the wear resistance of the surface was investigated by sandpaper abrasion test. The results showed that the mechanical wear resistance of the TiO2-SiO2 composite surface was more than three times that of the surface prepared only by the electrochemical technique, and the surface still maintained the capacity of hydrophobicity even after 33.6 m of wear under conditions of 3400 Pa and 360# sandpaper. The method mentioned in this paper could be a candidate for the production of abrasion-resistant and super-repellent titanium alloy.