Dynamic characteristics of drops on tilted hydrophobic ratchet surfaces

IF 2.7 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Surface Innovations Pub Date : 2022-02-04 DOI:10.1680/jsuin.21.00082

Xin-ran Dai, Zhi-hai Jia, Jiao Wang

引用次数: 0

Abstract

Asymmetric ratchet surfaces are used to manipulate drops which has received extensive attention due to their wide potential applications. In this paper, using aluminum sheets as substrates, some hydrophobic ratchet surfaces with different geometric parameters were prepared. The dynamic behavior of drops in the initial movement stage on the tilted surfaces was captured by a high-speed camera. Compared with the behavior on the flat tilted aluminum sheet, the velocity and acceleration of the drop on the tilted ratchet surfaces exhibit nonlinearly characteristics. The forces acting on the drop was analyzed and a theoretical model was proposed to elucidate the dynamic behavior, which was in agreement with our experimental results. Besides, by changing the tilt angle of the substrate, the geometric parameters of ratchets, and the size of drops, the factors that affect the drop movement were discussed.

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液滴在倾斜疏水棘齿表面上的动力学特性

不对称棘轮表面用于操纵液滴，由于其广泛的潜在应用而受到广泛关注。本文以铝板为基材，制备了不同几何参数的疏水棘轮表面。用高速摄像机捕捉了水滴在倾斜表面初始运动阶段的动态行为。与在平倾斜铝板上的行为相比，在倾斜棘轮表面上雨滴的速度和加速度表现出非线性特征。分析了作用在液滴上的力，并提出了一个理论模型来解释液滴的动力学行为，与实验结果相吻合。此外，通过改变衬底倾斜角度、棘轮几何参数和液滴大小，讨论了影响液滴运动的因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surface Innovations CHEMISTRY, PHYSICALMATERIALS SCIENCE, COAT-MATERIALS SCIENCE, COATINGS & FILMS

CiteScore

5.80

自引率

22.90%

发文量

期刊介绍： The material innovations on surfaces, combined with understanding and manipulation of physics and chemistry of functional surfaces and coatings, have exploded in the past decade at an incredibly rapid pace. Superhydrophobicity, superhydrophlicity, self-cleaning, self-healing, anti-fouling, anti-bacterial, etc., have become important fundamental topics of surface science research community driven by curiosity of physics, chemistry, and biology of interaction phenomenon at surfaces and their enormous potential in practical applications. Materials having controlled-functionality surfaces and coatings are important to the manufacturing of new products for environmental control, liquid manipulation, nanotechnological advances, biomedical engineering, pharmacy, biotechnology, and many others, and are part of the most promising technological innovations of the twenty-first century.