Rigid—flexible hybrid surfaces for water-repelling and abrasion-resisting

Friction

Research Article

Xiaobao Cao¹  Andrew Demello¹  Tom Reddyhoff²  Daniele Dini²  Jinbang Li³  Songtao Hu⁴  Xi Shi⁴  Zhike Peng⁵  Weifeng Huang⁶ 

[1] Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland;Department of Mechanical Engineering, Imperial College London, SW7 2AZ, London, UK;School of Mechanical Engineering and Mechanics, Ningbo University, 315211, Ningbo, China;State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 200240, Shanghai, China;State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 200240, Shanghai, China;School of Mechanical Engineering, Ningxia University, 750021, Yinchuan, China;State Key Laboratory of Tribology, Tsinghua University, 100084, Beijing, China;

关键词: surface;    droplet impact;    hydrophobic;    abrasion;   

DOI  :  10.1007/s40544-022-0633-6

 received in 2021-09-29, accepted in 2022-04-08,  发布年份 2022

来源: Springer

【 摘 要 】

Droplets impacting solid superhydrophobic surfaces is appealing not only because of scientific interests but also for technological applications such as water-repelling. Recent studies have designed artificial surfaces in a rigid—flexible hybrid mode to combine asymmetric redistribution and structural oscillation water-repelling principles, resolving strict impacting positioning; however, this is limited by weak mechanical durability. Here we propose a rigid—flexible hybrid surface (RFS) design as a matrix of concave flexible trampolines barred by convex rigid stripes. Such a surface exhibits a 20.1% contact time reduction via the structural oscillation of flexible trampolines, and even to break through the theoretical inertial-capillary limit via the asymmetric redistribution induced by rigid stripes. Moreover, the surface is shown to retain the above water-repelling after 1,000 abrasion cycles against oilstones under a normal load as high as 0.2 N·mm−1. This is the first demonstration of RFSs for synchronous waterproof and wearproof, approaching real-world applications of liquid-repelling.

【 授权许可】

CC BY   
© The author(s) 2022

【 图 表 】

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