Superomniphobic surfaces for easy-removals of environmentalrelated liquids after icing and melting
作者机构：Laser Materials Processing Research CenterKey Laboratory for Advanced Materials Processing Technology(Ministry of Education)Joint Research Center for Advanced Materials&Anti-icing of Tsinghua University(SMSE)-AVIC ARISchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第2期
页 面：3267-3277页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：the National Key Research and Development Program of China(No.2017YFB1104300) the Tsinghua University Initiative Scientific Research Program(No.2018Z05JZY009) the National Natural Science Foundation of China(Nos.51575309 and 51210009).
主 题：superomniphobic surfaces easy-removal environmental-related liquids icing melting
摘 要：Superhydrophobic surfaces often lose the easy-removal ability of liquids during icing&melting cycles due to the impalement phenomena of air pockets.Especially for the most common mixed liquids in normal life,their difficult-removals after icing and melting have brought colossal troubles in the fields of aviation,energy,biomedicine,etc.Here we adopt the ultrafast laser to fabricate the optimal micro-nanostructured surfaces,realizing excellent superomniphobicity for seven environmental-related liquids.It is demonstrated that different droplets on the surfaces recover well to the original Cassie-Baxter state after melting,and can be removed easily at low tilted angles.The ice adhesion strengths of the seven liquids as low as 5 kPa and the micro-nanostructure durability ensure the long-term easy-removal after icing.Compared with the ice adhesion strength of untreated surfaces(264.4±17.6 kPa),those of our designed surfaces have decreased by over 50 times.Icing and melting processes are investigated to reveal the easy-removal mechanisms that specifically distributed solutes and bubbles after icing impact downwards significantly to accelerate the recovery of the Cassie–Baxter state during melting.A series of environmental-related durability experiments including continuous icing&melting cycles,long-term salt spray,and high-pressure water jet impact further demonstrate the surfaces promising for real applications.
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