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

作　　者：Yue Jiang Xinyi Li Zhichao Ma Zhihui Zhang Cuie Wen Zhonghao Jiang Nan Lin Luquan Ren 

机构地区：[1]Key Laboratory of Bionic Engineering of Ministry of Education,College of Biological and Agricultural Engineering,Jilin University,Changchun,130022,China [2]Hubei Provincial Engineering Technology Research Center for Microgrid,College of Electrical Engineering and New Energy,China Three Gorges University,Yichang,443002,China [3]School of Mechanical and Aerospace Engineering,Jilin University,Changchun,130025,China [4]Centre for Additive Manufacturing,School of Engineering,RMIT University,Melbourne,Victoria,3001,Australia [5]Key Laboratory of Automobile Materials of Ministry of Education,College of Materials Science and Engineering,Jilin University,Changchun,130025,China [6]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,Jilin University,Changchun,130012,China

出　　处：《Journal of Bionic Engineering》2024年第3期1347-1359,共13页仿生工程学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.52105303 and 52025053);Natural Science Foundation of Jilin Province(No.20220101209JC);Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.52021003).

摘　　要：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.

关 键 词：Hierarchical structure Wetting state regulation Wetting transition SUPERHYDROPHOBICITY SUPERHYDROPHILICITY 

分 类 号：Q81[生物学—生物工程] TB3[一般工业技术—材料科学与工程]