| 초록 |
Hydrophobicity and anisotropic wetting behavior of water droplets were investigated on various hydrophobic wavy surfaces. These structures are fabricated by uniaxially stretching Poly(dimethyl siloxane) (PDMS) network films in a extending apparatus and exposing them to ultraviolet/ozone radiation for extended periods of time. The surface morphology can be controlled by tuning the stretching ratio and the duration of the oxidation time. In order to increase the hydrophobicity of surfaces, wavy surfaces were modified with several hydrophobic organosilanes by a chemical vapor adsorption, which makes it possible to prepare amorphous alkylsilane layers on the PDMS sheets. We have investigated various wetting phenomena, such as contact angles, sliding angles, and droplet distortions on the wrinkled hydrophobic surface. Relationships between the wavy structures and the anisotropic wetting properties will be also presented. |
