超疏水低黏附自清洁类蝶鳞片仿生结构的激光构筑与力学机理  

Superhydrophobic Low Adhesion Self-Cleaning Biomimetic Surfaces:Laser Construction and Mechanical Properties of Simulated Butterfly Scales

作　　者：李晶[1] 丛居平 郭楠 杜新[1] 张景然 杜锋 Li Jing;Cong Juping;Guo Nan;Du Xin;Zhang Jingran;Du Feng(School of Mechanical and Electric Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China;Department of Basic,Army Academy of Armored Forces,Changchun 130117,Jilin,China)

机构地区：[1]长春理工大学机电工程学院,吉林长春130022 [2]陆军装甲兵学院士官学校基础部,吉林长春130117

出　　处：《中国激光》2022年第16期76-83,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(51975060,51505039,51905047);吉林省科学技术厅自然科学基金(20180101322JC);吉林省教育厅科学技术研究项目(JJKH20210810KJ)。

摘　　要：受自然界素饰蛱蝶翅膀鳞片表面结构的启发,本研究团队建立仿生结构模型,利用激光烧蚀技术在粗化铝合金表面构建了一种具有超疏水、低黏附、自清洁性能的仿生网格状多级结构。采用扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)、光学接触角测量仪和高速成像等设备对材料表面进行了表征分析,结果表明:喷砂粗化结合激光烧蚀可以形成类蛱蝶鳞片网格状多级结构,该结构具有复杂的形态和复合尺度特征,其表面具有超疏水性能,静态接触角可达到162.6°,滚动角小于5°;液滴弹跳试验和自清洁性能试验结果表明,该仿生结构表面具有良好的低黏附力和自清洁性能,在脱附、减阻、自清洁等领域具有一定的应用潜力。Objective Superhydrophobic surfaces are corrosion-resistant and have excellent anti-icing,anti-fogging,and anti-fouling properties.They have the potential for broad applications in machinery manufacturing,industrial production,electronic information,and other fields.However,while in use,the material surface is easily affected by dust and other pollutants so that its performance decreases.Therefore,it is necessary to develop superhydrophobic surfaces with self-cleaning and low adhesion properties.At present,this kind of composite functional surface is mainly realized by constructing micro-nano structures combined with low surface-energy chemical modifications.These processing methods greatly improve the hydrophobic performance of metal surfaces;however,they limit the working conditions because of the need for terminal low-energy modification conditions.Therefore,it is urgent to adopt simple and efficient methods for preparing highperformance composite metal surfaces.Laser processing methods have advantages such as a wide range of applicability,convenient operation,and non-contact implementation;moreover,they are highly adjustable and yield high processing accuracy for the micro-nano processing of materials.In this study,a biomimetic micron-scale structure was constructed on the surface of an aluminum alloy by a laser ablation method,and a superhydrophobic low viscosity self-cleaning surface was obtained by adjusting the laser processing parameters(Fig.1).Methods In this work,the unique structure of butterfly wings was used as the model for a biomimetic grid;the grid groove structure was prepared on the surface of a sandblasted,coarse-grained aluminum alloy by laser processing.The surface structure of the biomimetic metal sample was optimized by adjusting the laser processing spacing.The surface morphology,chemical composition,and surface wettability of the materials were characterized by scanning electron microscopy(SEM),laser scanning confocal microscopy(LSCM),X-ray photoelectron spectroscopy(XPS),optical contact

关 键 词：激光技术 微观结构制造 超疏水表面 自清洁 低黏附 仿生结构 

分 类 号：TN249[电子电信—物理电子学]