Regulation of droplet impacting on superhydrophobic surfaces: Coupled effects of macrostructures, wettability patterns, and surface motion

润湿 曲面(拓扑) 动力学(音乐) 接触角 纳米技术 透视图(图形) 材料科学 固体表面 润湿转变 表面能 运动(物理) 机械 化学物理 计算机科学 化学 物理 经典力学 复合材料 几何学 数学 人工智能 声学
作者
Fuqiang Chu,Shuxin Li,Zhifeng Hu,Xiaomin Wu
出处
期刊:Applied Physics Letters [American Institute of Physics]
卷期号:122 (16) 被引量:47
标识
DOI:10.1063/5.0147696
摘要

Superhydrophobic surfaces have shown great application prospects due to their excellent water repellency in many applications involving fluid–surface interactions. As a ubiquitous fluid–surface interaction phenomenon, droplet impacting dynamics has a crucial effect on the application of superhydrophobic surfaces. In this Perspective, we summarize the basic process of droplet impacting on superhydrophobic surfaces and introduce the two most concerned parameters that describe the droplet impacting dynamics, i.e., the maximum spreading coefficient and the contact time. We then review two improvement strategies for superhydrophobic surfaces: one is to construct macrostructures and the other is to set wettability patterns on the surface. The former strategy shows great potential in reducing the droplet contact time, and the latter one can accurately regulate the behavior of impacting droplets. The motion of superhydrophobic surfaces also changes the droplet impacting dynamics due to the additional aerodynamic effect or energy input, which arouses attention recently. However, only the individual influence of each factor (e.g., macrostructures, wettability patterns, or surface motion) on the droplet impacting dynamics has been focused in literature, so we write this Perspective to emphasize the importance and urgency of studying the coupled effects of these three factors.
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