An easy-to-implement method for fabricating superhydrophobic surfaces inspired by taro leaf  

作　　者：LI KaiKai LEI Jiang XIE YingXi LU LongSheng ZHANG ShaoHui ZHOU PeiYang LIANG RongXuan WAN ZhenPing TANG Yong 

机构地区：[1]School of Mechanical&Automotive Engineering,South China University of Technology,Guangzhou 510641,China [2]Division of Interdisciplinary and Comprehensive Research,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China [3]GBA Research Innovation Institute for Nanotechnology,Guangzhou 510700,China [4]College of Engineering,South China Agricultural University,Guangzhou 510642,China

出　　处：《Science China(Technological Sciences)》2021年第12期2676-2687,共12页中国科学（技术科学英文版）

基　　金：the National Key Research and Development Program of China(Grant No.2019YFE0126300);the National Natural Science Foundation of China(Grant No.51775197);the Natural Science Foundation of Guangdong Province(Grant No.2019A1515011530)。

摘　　要：An easy-to-implement method by which to fabricate superhydrophobic surfaces inspired taro leaf was successfully applied on316 L stainless steel via combining nanosecond laser(NL)processing and spin-coating techniques.The laser-textured surface composed of microscale frameworks and central bumps was fabricated by NL processing based on properly designed biomimetic patterns,and a layer of nanoscale carbon black/polydimethylsiloxane(CB/PDMS)particles was covered on it by spin-coating.The effect of pattern parameters(i.e.,the inscribed circle radius of framework and the radius of central bump)on wettability of biomimetic surface was investigated.All as-prepared biomimetic surfaces with micro-nano hierarchical structures showed excellent superhydrophobicity with the water contact angle of~155°and contact angle hysteresis of~2°.By comparing the untreated surface,the wetting behavior and evaporation mode of the biomimetic surface occurred an obvious transformation.Meanwhile,experiments indicated that the biomimetic surface not only had liquid-repelling and self-cleaning functions,but also maintained remarkable mechanical robustness and superhydrophobic durability.The method is efficient for fabricating biomimetic superhydrophobic surfaces applied to liquid-repelling,evaporation-transforming and self-cleaning fields.

关 键 词：taro leaf superhydrophobic surface micro-nano hierarchical structures ROBUSTNESS DURABILITY 

分 类 号：TG174.4[金属学及工艺—金属表面处理]