材料科学
润湿
聚结(物理)
涂层
接触角
背景(考古学)
纳米技术
复合材料
超疏水涂料
聚乙烯
冷凝
基质(水族馆)
气象学
天体生物学
古生物学
海洋学
物理
地质学
生物
作者
Carina Breuer,Cynthia Cordt,Benjamin Hiller,Andreas Geißler,Markus Biesalski
标识
DOI:10.1002/admi.202301048
摘要
Abstract This study identifies important factors for designing an effective biomimetic paper‐based fog harvesting substrate by examining the harvesting properties of different surfaces, including glass, polyethylene, and superhydrophobic paper. In laboratory‐scale fogging tests, the wetting behavior of the substrates is characterized, and the importance of the tilt angle of the respective surface relative to the fog flow is elaborated. Because successful fog harvesting requires both efficient accumulation of water droplets on the surface (by condensation and collision) and sufficient but not excessive roll‐off of the liquid, the amount of water finally collected is clearly related to the pinning effect, which should prevent the smallest droplets from being carried away by the wind but must not lead to full and permanent wetting of the surface. Coalescence is identified as a major phenomenon to improve droplet roll‐off. In this context, superhydrophobic paper indicates to be a more effective water collector than glass or polyethylene, especially when oriented vertically, since it allows the droplets to roll off very efficiently. Finally, the addition of glass particles to the superhydrophobic coating is proposed as a means of enhancing pinning and improving the fog harvesting efficiency.
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