Fluorine-free superhydrophobic surface with micron-nanosized two-tiered structure for self-cleaning, anti-frosting, and anti-icing applications

除霜 接触角 涂层 超疏水涂料 材料科学 图层(电子) 纳米技术 结冰 复合材料 化学工程 空调 气象学 热力学 物理 工程类
作者
Yiming Jian,Hongtao Gao,Yuying Yan
出处
期刊:Colloids and Surfaces A: Physicochemical and Engineering Aspects [Elsevier BV]
卷期号:651: 129761-129761 被引量:12
标识
DOI:10.1016/j.colsurfa.2022.129761
摘要

Superhydrophobic surfaces with micron-nanosized two-tiered structures have huge potential in practical applications. However, the complex preparation process and low-stability of the versatile superhydrophobic surfaces restricted their wide application. Herein, a facile chemical etching process was applied to create a micron-sized rough structure on the 1060 aluminum alloy substrate, and the micron-sized rough structure surface (M-surface) was hydrophobic with a water contact angle of 113.50° ± 2.7°. Then, the M-surface was modified by hydrophobic SiO2 nanoparticles, and a superhydrophobic micron-nanosized two-tiered structure surface (MNSS-TMES/H-SiO2 coating) with a water contact angle of 161.20° ± 2.3° was constructed. The as-prepared MNSS-TMES/H-SiO2 coating can maintain superhydrophobicity after self-cleaning, sand impact, and anti-frosting tests. More importantly, the MNSS-TMES/H-SiO2 coating exhibited superior anti-icing performance and higher defrosting efficiency. The freezing delay time of a water droplet on the MNSS-TMES/H-SiO2 coating was prolonged to 4973.87 s at − 15 °C, and the frost layer on the resultant coating was melting speedily and turned into several isolated spherical water droplets in approximately 20 s. Therefore, the prepared durable fluorine-free superhydrophobic MNSS-TMES/H-SiO2 coating with self-cleaning performance, higher defrosting efficiency, and the ability to delay icing, which has great prospects in practical applications.
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