Laser Ablation and Chemical Oxidation Synergistically Induced Micro/Nano Re-entrant Structures for Super-Oleophobic Surface with Cassie State  

作　　者：Jiaqi Chao Faze Chen Lei Xia Zexin Cai Fujun Wang Yanling Tian Dawei Zhang 

机构地区：[1]School of Mechanical Engineering,Tianjin University,Tianjin 300072,China [2]Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education,Tianjin University,Tianjin 300072,China [3]School of Engineering,University of Warwick,Coventry CV47DL,UK

出　　处：《Nanomanufacturing and Metrology》2023年第2期79-89,共11页纳米制造与计量（英文）

基　　金：This work was fnancially supported by National Postdoctoral Program for Innovative Talents(No.BX20190233);National Natural Science Foundation of China(No.52105477).

摘　　要：Generally,re-entrant structures are a key part of fabricating superoleophobic surfaces,and this structure appears in almost all kinds of published research articles regarding superoleophobicity.However,the application of related fabrication methods is usually too complex and costly in real practice.In this paper,we present a simple method to generate micro-cauliflower structures,which work as re-entrant structures in microcone arrays,to promote the formation of superoleophobic surfaces.The heating process after alkali-assisted surface oxidation is the main reason for the appearance of a micro-ball structure,and the oxidation time can influence the size of the micro-ball.To the best of our knowledge,the influence of the heating process after alkali-assisted surface oxidation on the birth of the micro-ball structure is seldom researched.A low-surface-energy treatment was also analyzed in influencing the size of the re-entrant structure and its relative wettability.Droplets of 5μl of n-decane show contact angles of 155±1°on the as-prepared superoleophobic surface,and air pockets can be clearly seen underneath,indicating a stable Cassie contacting state and a promising application value in the near future.

关 键 词：Superoleophobic Re-entrant structure Cassie state Laser direct writing 

分 类 号：TB383.1[一般工业技术—材料科学与工程]