A new model for contact angle hysteresis of superhydrophobic surface

Abstract

Contact angle hysteresis (CAH) is essential to characterize the wetting properties of a surface. But its underlying causes are not yet understood. A model relating to CAH is presented through mathematical deduction. The calculation results coincide well with several experimental data from previous findings in literatures. Factors affecting CAH are investigated. This study offers new insight into the understanding of CAH and offers useful guidance for the preparation of superhydrophobic surfaces.