Construction of a robust MOF-based superhydrophobic composite coating with the excellent performance in antifouling, drag reduction, and organic photodegradation

材料科学 涂层 阻力 超疏水涂料 浮力 复合材料 生物污染 润湿 化学工程 背景(考古学) 纳米技术 古生物学 物理 遗传学 量子力学 生物 工程类 热力学
作者
Min Li,Wenbo Xiao,Zuozhu Yin,Yu‐Hua Chen,Yidan Luo,Zhen Hong,Mingshan Xue
出处
期刊:Progress in Organic Coatings [Elsevier BV]
卷期号:186: 108086-108086 被引量:62
标识
DOI:10.1016/j.porgcoat.2023.108086
摘要

The superhydrophobic coating blocks a certain air layer between the solid surface and the liquid, thereby changing the interaction between the surface and water, and has potential applications in enhancing buoyancy and drag reduction. Consequently, a superhydrophobic coating designed to reduce drag (the contact angle was up to 168°) was prepared in this study. The coating was applied to copper mesh by spraying a mixed solution comprising ZIF-8 particles, waterborne polyurethane, and a silane coupling agent, resulting in a significant enhancement of load capacity. The superhydrophobic coating can change the contact mode between the copper mesh and water, leading to a remarkable sevenfold increase in the maximum load capacity when compared with the uncoated sample, primarily due to its' increased buoyancy. In addition, the self-made superhydrophobic model ship exhibited an impressive drag reduction efficiency of up to 36 %, indicating that it has significant drag reduction capability. It's worth noting that once water enters, the superhydrophobic spheres will form a gas cavity, which is critical for the coating's drag reduction capability. The self-cleaning property of this superhydrophobic composite coating is highly promising. Moreover, it can also purify seawater by utilizing ZIF-8's photocatalytic activity to degrade organic contaminant. Therefore, in the context of actual ships and underwater vehicles, this superhydrophobic coating holds potential as a relevant strategy for enhancing buoyancy and reducing drag, thus offering commercial value.
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