Determining the equilibrium wetting states and exploring the conditions and mechanisms of the wetting state transition from the Cassie-Baxter (CB) state to the Wenzel (W) state (CB-W transition) have been a central topic in the study of superhydrophobic behavior on rough or textured surfaces. Although considerable progress has been made, some issues regarding this topic are still not completely understood. In this study, a systematic thermodynamic analysis has been performed to address several key issues related to this topic. Generalized theoretical expressions for determining the equilibrium wetting states (the threshold Young contact angle of the CB region) and evaluating the stability of the CB state (the energy barrier separating the CB and W states and the critical pressure for the CB-W transition) have been derived. Applying these expressions to four types of surfaces built with protrusions in paraboloid, truncated cone, inverted truncated cone and flat-top pillar shapes, the wetting equilibrium and resultant wetting states have been studied. The physical meanings of the threshold Young contact angle, the roles and mechanisms of the energy barrier and critical pressure in stabilizing the CB state have been discussed. Finally, a general guidance for achieving robust superhydrophobicity on the studied surfaces has been given.

确定平衡润湿状态并探索从Cassie-Baxter（CB）状态到Wenzel（W）状态（CB-W转变）的润湿状态转变的条件和机理一直是研究超疏水行为的中心课题。粗糙或有纹理的表面。尽管已经取得了长足的进步，但是有关此主题的一些问题仍未完全理解。在这项研究中，进行了系统的热力学分析，以解决与该主题相关的几个关键问题。用于确定平衡润湿状态（CB区的阈值杨氏接触角）和评估CB状态的稳定性（分隔CB和W状态的能垒以及CB-W转变的临界压力）的通用理论表达式具有被派生。将这些表达式应用于以抛物面，截头圆锥体，倒截头圆锥体和平顶柱形状的突起构建的四种类型的表面，研究了润湿平衡和所得的润湿状态。讨论了临界杨氏接触角的物理意义，能垒和临界压力在稳定CB状态中的作用和机理。最后，给出了在研究的表面上实现稳健的超疏水性的​​一般指导。讨论了能量屏障和临界压力在稳定CB状态中的作用和机理。最后，给出了在研究的表面上实现稳健的超疏水性的​​一般指导。讨论了能量屏障和临界压力在稳定CB状态中的作用和机理。最后，给出了在研究的表面上实现稳健的超疏水性的​​一般指导。