Fog water collection gains increasing attention for harvesting atmospheric water to solve the water resource crisis in arid or semi-arid areas. In this work, a durable superhydrophobic coating based on halloysite nanotubes (HNT) for water collection is fabricated by introducing 1H,1H,2H,2H-perfluorodecyl trimethoxysilane (PFTS) modified HNT into a hydrophobic polydimethylsiloxane (PDMS) coating to construct a rough and superhydrophobic surface. The dip-coating method is employed to apply the coatings onto various substrates. The surface wettability, water collection rate, mechanical stability, and durability, oil/water separation efficiency and flux, and oil absorption capacity are investigated in detail. When the content of fluorinated modified HNT (F-HNT) is 15 %, superhydrophobic F-HNT@PDMS coated fabrics with a high water contact angle (157.3°) as well as a low sliding angle (3.7°) are obtained, and the treated fabrics show excellent self-cleaning ability. After 100 mechanical wear cycles, the coated fabrics remain superhydrophobicity, and the oil/water separation efficiency is maintained above 99.5 %. Furthermore, different substrates dip-coated with F-HNT@PDMS exhibit high-efficiency water collection rates of 952.25–1058.5 mg∙cm∙h. Therefore, this work provides a feasible strategy for preparing a durable superhydrophobic coating with a high-efficiency water collection rate and is expected to be applied in fog water harvesting in scarce areas.

中文翻译：

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基于埃洛石纳米管的耐用超疏水涂层，用于多功能油/水分离和可重复使用的水收集

雾水收集因收集大气水以解决干旱或半干旱地区的水资源危机而受到越来越多的关注。在这项工作中，通过将 1H,1H,2H,2H-全氟癸基三甲氧基硅烷 (PFTS) 改性的 HNT 引入疏水性聚二甲基硅氧烷 (PDMS) 涂层中，构建出粗糙且粗糙的水收集用基于埃洛石纳米管 (HNT) 的耐用超疏水涂层。超疏水表面。采用浸涂方法将涂料涂覆到各种基材上。详细研究了表面润湿性、集水率、机械稳定性和耐久性、油/水分离效率和通量以及吸油能力。当氟化改性HNT（F-HNT）含量为15%时，获得了具有高水接触角（157.3°）和低滑动角（3.7°）的超疏水F-HNT@PDMS涂层织物，并且处理后的织物表现出优异的自洁能力。经过100次机械磨损循环后，涂层织物仍保持超疏水性，油水分离效率保持在99.5%以上。此外，浸涂 F-HNT@PDMS 的不同基材表现出 952.25–1058.5 mg∙cm∙h 的高效水收集率。因此，这项工作为制备具有高效率集水率的耐用超疏水涂层提供了可行的策略，并有望应用于稀缺地区的雾水收集。