超疏水材料表面液—气界面的稳定性及演化规律  

Stability and evolution of liquid-gas interfaces on superhydrophobic surfaces

作　　者：吕鹏宇[1] 薛亚辉[1] 段慧玲[1,2,3] 

机构地区：[1]北京大学工学院力学与工程科学系,北京100871 [2]北京大学工学院应用物理与技术研究中心,北京100871 [3]IFSA协同创新中心上海交通大学,上海200240

出　　处：《力学进展》2016年第1期179-225,共47页Advances in Mechanics

基　　金：国家杰出青年科学基金(11225208);国家基金委创新群体(11521202)资助项目

摘　　要：超疏水表面功能材料在防污、流动减阻等领域具有重要应用,其中液–气界面的稳定性是关系到该种材料性能发挥的关键因素.微结构液–气界面的稳定性主要体现在浸润状态转变过程,浸润状态恢复过程和气泡形态演化过程三个方面.在压强变化、气体扩散等多种因素作用下,液–气界面会发生失稳现象,并以不同的形态变化方式进行演化发展.该文首先总结了三类液–气界面稳定性问题.在不同的演化阶段,液–气界面具有不同的位置和形状,体现出不同的稳定性.然后,分别针对液滴系统和水下浸没系统,考虑了几种主要的影响因素,综述了目前国内外关于超疏水微结构液–气界面稳定性研究的主要进展,总结液–气界面的演化机制.最后,展望了该领域中存在的主要科学问题.Microstructured superhydrophobic surfaces have broad applications such as anti-fouling and drag reduction. The performance of such surfaces strongly depends on the stability of liquid-gas interfaces, which affects physical processes including wetting transition, restoration and bubble evolution. Various physical factors including pressurization and gas diffusion may destabilize the liquid-air interfaces, and lead to evolution in different manners. In this paper, we first summarize the three types of interracial stability problems for liquid-gas interfaces. Relying on external stimulations, the liquid-air interface may evolve into different stages and exhibit different morphologies. The recent progress of research on the stability and control of liquid-air interfaces in both droplet systems and submersion circumstances has been reviewed. Based on this review, remaining challenges for future research have been given.

关 键 词：超疏水微结构表面 液-气界面 稳定性 演化规律 浸润状态转变过程 

分 类 号：O363.2[理学—流体力学]