Dynamic Wettability on Inorganic Oxide Surfaces of Dynamic Hydrophobicity

Abstract

We have succeeded in developing metal oxide surfaces which show a high dynamic hydrophobicity despite a relatively low static hydrophobicity. Dynamic solid-liquid interaction as a liquid droplet-movement on inclined surfaces, which are developed inorganic oxide films and general organic films, is investigated. The liquid droplet movement is affected by a surface energy, roughness, and homogeneity of the solid surface. Furthermore, it is suggested that the internal fluidity detected by Particle Image Velocimetry method determined the rate. The movement also depends on the shape of a droplet, which possibly changes the internal flow drastically. In this presentation, we will discuss the detail of relations among them.