Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 14, 2019
Wettability on structured surfaces is gaining remarkable interest for a wide range of applications. In this study, the partial wetting model has been derived theoretically based on the energy minimization method. The intermediate wetting state between Wenzel model for a fully wetting state and Cassie-Baxter model for a completely non-wetting state on structured surface is under consideration. We adopt the surface energy minimization for the total surface energy in the intermediate wetting state and derived an equation using a parameter defined as the effective wetting ratio to interpret the partial wetting. Good agreements between the theoretical prediction and experimental results have been confirmed to explain the partial wetting at the nano/microstructured surfaces.