微观结构对超疏水表面润湿性的影响

Wettability of Superhydrophobic Surface Through Tuning Microcosmic Structure

润湿性是衡量超疏水表面疏水强弱的最重要特征之一,而微观结构与超疏水表面的润湿性有着密切联系。本文讨论了导致超疏水现象的两种理论模型——Wenzel模型和Cassie模型,并运用模型分析了微观结构的几何参数对超疏水表面表观接触角的影响。分析表明,在制备超疏水表面过程中应使表面状态满足Cassie模型,并可以通过改变微观结构的几何参数来控制表面润湿性,获得具有较大表观接触角的超疏水表面。

Wettability is one of the most important properties which weighs hydrophobic capability of superhydrophobic surface. There are close relations between microcosmic structure and wettability of superhydrophobic surface. In this paper Wenzel model and Cassie model which bring on superhydrophobic phenomenon were discussed and the effect of microcosmic structure to apparent contact angle of superhydrophobic surface was analysed through the models. The analysis shows that the state of preparation superhydrophobic surface should be coincident with Cassie model and its wettability can be controled through changing geometry parameters of microcosmic structure to obtain a superhydrophobic surface with greater apparent contact angle.