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Robust superhydrophobic surfaces with excellent capacities of repelling water and anti-frosting are of importance for many mechanical components. In this work, wear-resistant superhydrophobic surfaces were fabricated by curing a mixture of polyurethane acrylate (PUA) coating and 1H,1H,2H,2H-Perfluorodecyltrichlorosilane (HFTCS) on titanium alloy (TC4) surfaces decorated with micropillars pattern, thus, composite functional surfaces with PUA coating in the valleys around the micropillars pattern of TC4 were achieved. Apparent contact angle on fabricated surfaces could reach 167°. Influences of the geometric parameters of micropillars pattern on the apparent contact angle were investigated, and the corresponding wear-resistant property was compared. Droplet impact and anti-frosting performances on the prepared surfaces were highlighted. An optimized design of surface texture with robust superhydrophobicity, controllable droplet impact, and anti-frosting performances was proposed. This design principle is of promising prospects for fabricating superhydrophobic surfaces in traditional mechanical systems.


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Rapid surface texturing to achieve robust superhydrophobicity, controllable droplet impact, and anti-frosting performances

Show Author's information Qingwen DAI1( )Lei CHEN1Jiabao PAN3Liping SHI4Dameng LIU2( )Wei HUANG1Xiaolei WANG1
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
State Key Laboratory of Tribology in Advanced Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
School of Mechanical Engineering, Anhui Polytechnic University, Wuhu 241000, China
School of Mechanical Engineering, Anhui University of Technology, Ma’anshan 243032, China

Abstract

Robust superhydrophobic surfaces with excellent capacities of repelling water and anti-frosting are of importance for many mechanical components. In this work, wear-resistant superhydrophobic surfaces were fabricated by curing a mixture of polyurethane acrylate (PUA) coating and 1H,1H,2H,2H-Perfluorodecyltrichlorosilane (HFTCS) on titanium alloy (TC4) surfaces decorated with micropillars pattern, thus, composite functional surfaces with PUA coating in the valleys around the micropillars pattern of TC4 were achieved. Apparent contact angle on fabricated surfaces could reach 167°. Influences of the geometric parameters of micropillars pattern on the apparent contact angle were investigated, and the corresponding wear-resistant property was compared. Droplet impact and anti-frosting performances on the prepared surfaces were highlighted. An optimized design of surface texture with robust superhydrophobicity, controllable droplet impact, and anti-frosting performances was proposed. This design principle is of promising prospects for fabricating superhydrophobic surfaces in traditional mechanical systems.

Keywords: droplet impact, surface texture, anti-frosting, robust superhydrophobic, wear-resistant

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Publication history

Received: 12 April 2022
Revised: 13 February 2023
Accepted: 08 March 2023
Published: 29 November 2023
Issue date: February 2024

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© The author(s) 2023.

Acknowledgements

The authors are grateful for the support provided by the National Natural Science Foundation of China (No. 51805252), the Tribology Science Fund of State Key Laboratory of Tribology (No. SKLTKF21B02), and the Alexander von Humboldt Foundation.

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