Stability Mechanism of Laser-induced Fluorinated Super-hydrophobic Coating in Alkaline Solution  

作　　者：Haoyang Li Yanling Tian Zhen Yang 

机构地区：[1]School of Mechanical Engineering,Tianjin University,Tianjin,300350,China [2]Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Hong Kong,999077,China

出　　处：《Journal of Bionic Engineering》2022年第1期113-125,共13页仿生工程学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(2017YFB1104700);National Postdoctoral Program for Innovative Talents(BX20190233);Tianjin Natural Science Foundation(19JCQNJC03900);the National Natural Science Foundations of China(51675371,51675376,and 51675367).

摘　　要：Great attention has been focused on super-hydrophobic surfaces due to their fantastic applications.Fluoride chemicals are widely used to fabricate super-hydrophobic surfaces due to their convenience,simplicity,and high efficiency.Previous research has made extensively efforts on corrosion resistance of fluorinated super-hydrophobic surfaces in corrosive media.Nevertheless,rare papers focused on the underlying reasons of anticorrosion property and stability mechanism on the fluorinated super-hydrophobic coatings in alkaline solution.Therefore,this work aims to reveal these mechanisms of fluorinated super-hydrophobic copper samples in strong alkaline solution(pH 13).Through the characterization of surface wettability and surface morphology,the laser-induced super-hydrophobic surface retained excellent stability after soaking in alkaline solution for 4 h.Through measurement of chemical compositions,the anticorrosion mechanism and stability mechanism of the fluorinated super-hydrophobic surface were proposed.Importantly,the hydroxyl ion(OH−)can further promote the hydrolysis reaction to improve the density and bonding strength of the fluoride molecules.Finally,the electrochemical experiments(PDP and EIS tests)were conducted to validate the rationality of our proposed conclusions.

关 键 词：FLUORIDE Laser SUPER-HYDROPHOBICITY Alkaline corrosion Stability mechanism 

分 类 号：TQ63[化学工程—精细化工]