阻力
材料科学
润湿
纳米技术
多孔性
水下
莲花效应
复合材料
化学
工程类
航空航天工程
海洋学
地质学
有机化学
原材料
作者
Pengfei Sun,Xiaoming Feng,Guizhong Tian,Xiaowei Zhang,Jie Chu
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-08-24
卷期号:38 (35): 10875-10885
被引量:16
标识
DOI:10.1021/acs.langmuir.2c01566
摘要
The self-healing superhydrophobic surfaces have attracted great interest owing to restoring superhydrophobicity without preparation crafts. However, the self-healing superhydrophobic surface still faces the dilemma of long repairing time. Especially in aqueous environments, superhydrophobic surfaces are highly susceptible to contamination and damage. In the current study, a superhydrophobic surface with ultrafast repairability was developed, which apply for drag reduction in aqueous medium. The prepared superhydrophobic surface can recover superhydrophobicity in only 30 s after severe physical and chemical damage. In addition, this research pioneered the combination of superhydrophobicity and porous structures for underwater drag reduction. The study of drag reduction confirms that the superhydrophobic surface can reduce the frictional drag by about 43% in the water. However, the drag reduction rate of the superhydrophobic surface with the porous structure can be improved to 76% due to increased stability of the air layer. More importantly, the porous structure with the average pore size of 50 μm has the most excellent stability through further experiments on the underwater air layer. This is attributed to the proper size of the pore to effectively balance the capillary force and resist wetting in the marginal region. This study will bring inspiration for the large-scale application of superhydrophobic surfaces and long-term drag reduction.
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