标题：Both slender pillars and hierarchical structures achieving superhydrophobicity and the comparison of their properties
作者：Li, Hao; Peng, Yujie; Yu, Sirong; Yin, Xiaoli
作者机构：[Li, Hao; Peng, Yujie] Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China.; [Yu, Sirong; Yin, Xiaoli] China Univ Petr 更多
通讯作者地址：Li, H (corresponding author), Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China.; Yu, SR (corresponding author), China 更多
来源：APPLIED SURFACE SCIENCE
关键词：Superhydrophobic surface; Slender pillars; Hierarchical structures;; Stability; Applications
摘要：In this paper, both slender pillars and hierarchical structures on steel substrate including slender pillar ZnO structures on Zn coating, flower-like CuO structures on Cu coating and dandelion-like CuO structures on Cu-Zn coating were obtained. After low-energy modification, contact angles of these three coatings are 157.59 degrees, 160.69 degrees and 157.94 degrees, respectively, and slide angles of them are similar to 6 degrees, similar to 3 degrees and similar to 3 degrees, respectively. Based on classical Wenzel and Cassie theories, by fabricating microstructure models, we theoretically prove that both slender pillars and hierarchical structures can achieve superhydrophobicity. Furthermore, we systematically study the stability of these three superhydrophobic coatings with slender pillars or hierarchical structures using different methods and compare their applications in the field of self-cleaning, oleophobicity, anti-corrosion, and anti-scaling. We discover that these three superhydrophobic coatings with slender pillars or hierarchical structures all show excellent stability and self-cleaning property. The slender pillared superhydrophobic Zn coating presents excellent superhydrophobic property after sandpaper abrasion compared with hierarchical structured superhydrophobic Cu and Cu-Zn coatings. Whereas, the hierarchical structured superhydrophobic Cu coating with flower-like structures shows the best oleophobicity and anti-corrosion property, as well as the hierarchical structured superhydrophobic Cu-Zn coating with dandelion-like structures promises good anti-scaling property.