Adhesion of liquid droplets to rough surfaces.

摘要: We study the adhesion of liquid droplets to rough surfaces, focusing on how changes with surface chemistry and roughness. For hydrophobic surfaces (equilibrium contact angle θ(e)>90°), although increasing roughness augments apparent angle, it does not necessarily always reduce adhesion. In a domain defined by equilibrium this identifies regions where increases or decreases The two do border at θ(e)=90°. It is found that making low ratio (close 1) unless material highly (θ(e)>120°). other words, for existing materials (90°<θ(e)<120°), high ratios are needed. Additionally, adhesion, geometry microstructures should be designed such wetted fraction ratio. This particular importance design textured superhydrophobic surfaces.