Role of Multi-scale Hierarchical Structures in Regulating Wetting State and Wetting Properties of Structured Surfaces

IF 4.9 3区 计算机科学 Q1 ENGINEERING, MULTIDISCIPLINARY
Yue Jiang, Xinyi Li, Zhichao Ma, Zhihui Zhang, Cuie Wen, Zhonghao Jiang, Nan Lin, Luquan Ren
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Abstract

Amplifying the intrinsic wettability of substrate material by changing the solid/liquid contact area is considered to be the main mechanism for controlling the wettability of rough or structured surfaces. Through theoretical analysis and experimental exploration, we have found that in addition to this wettability structure amplification effect, the surface structure also simultaneously controls surface wettability by regulating the wetting state via changing the threshold Young angles of the Cassie–Baxter and Wenzel wetting regions. This wetting state regulation effect provides us with an alternative strategy to overcome the inherent limitation in surface chemistry by tailoring surface structure. The wetting state regulation effect created by multi-scale hierarchical structures is quite significant and plays is a crucial role in promoting the superhydrophobicity, superhydrophilicity and the transition between these two extreme wetting properties, as well as stabilizing the Cassie–Baxter superhydrophobic state on the fabricated lotus-like hierarchically structured Cu surface and the natural lotus leaf.

Abstract Image

多尺度分层结构在调节结构表面润湿状态和润湿特性中的作用
摘要 通过改变固/液接触面积来放大基底材料的内在润湿性被认为是控制粗糙或结构化表面润湿性的主要机制。通过理论分析和实验探索,我们发现除了这种润湿性结构放大效应之外,表面结构还可以通过改变卡西-巴克斯特润湿区和温泽润湿区的阈值杨氏角来调节润湿状态,从而同时控制表面润湿性。这种润湿状态调节效应为我们提供了另一种策略,即通过定制表面结构来克服表面化学的固有限制。多尺度分层结构产生的润湿状态调节效应相当显著,在促进超疏水、超亲水以及这两种极端润湿性之间的过渡方面发挥了关键作用,并稳定了制作的莲花状分层结构铜表面和天然荷叶上的卡西-巴克斯特超疏水状态。
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来源期刊
Journal of Bionic Engineering
Journal of Bionic Engineering 工程技术-材料科学:生物材料
CiteScore
7.10
自引率
10.00%
发文量
162
审稿时长
10.0 months
期刊介绍: The Journal of Bionic Engineering (JBE) is a peer-reviewed journal that publishes original research papers and reviews that apply the knowledge learned from nature and biological systems to solve concrete engineering problems. The topics that JBE covers include but are not limited to: Mechanisms, kinematical mechanics and control of animal locomotion, development of mobile robots with walking (running and crawling), swimming or flying abilities inspired by animal locomotion. Structures, morphologies, composition and physical properties of natural and biomaterials; fabrication of new materials mimicking the properties and functions of natural and biomaterials. Biomedical materials, artificial organs and tissue engineering for medical applications; rehabilitation equipment and devices. Development of bioinspired computation methods and artificial intelligence for engineering applications.
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