Rigid–flexible hybrid surfaces for water-repelling and abrasionresisting  

作　　者：Songtao HU Weifeng HUANG Jinbang LI Tom REDDYHOFF Xiaobao CAO Xi SHI Zhike PENG Andrew DEMELLO Daniele DINI 

机构地区：[1]State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China [2]State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China [3]School of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China [4]Department of Mechanical Engineering,Imperial College London,London SW72AZ,UK [5]Department of Chemistry and Applied Biosciences,ETH Zurich,Zurich 8093,Switzerland [6]School of Mechanical Engineering,Ningxia University,Yinchuan 750021,China

出　　处：《Friction》2023年第4期635-646,共12页摩擦（英文版）

基　　金：supported by the National Natural Science Foundation of China(12002202);Young Elite Scientist Sponsorship Program by the China Association for Science and Technology(YESS20200403);State Key Laboratory of Mechanical System and Vibration(MSVZD202104).

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.

关 键 词：SURFACE droplet impact HYDROPHOBIC ABRASION 

分 类 号：TH117.1[机械工程—机械设计及理论]