Fog-harvesting inspired by the Stenocara beetle-An analysis of drop collection and removal from biomimetic samples with wetting contrast
Fog-harvesting inspired by the Stenocara beetle-An analysis of drop collection and removal from biomimetic samples with wetting contrast
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DOI：
10.1016/j.apsusc.2013.08.017
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发表时间：
2013-11-01
影响因子：
6.7
通讯作者：
Kietzig, Anne-Marie
中科院分区：
文献类型：
--
作者：
White, Beatrice;Sarkar, Anjishnu;Kietzig, Anne-Marie
这项工作考察了喷雾室实验中有图案和无图案样品的捕雾能力。这些样品是由不同的材料制成的，调查的图案是沟槽、疏水斑块和亲水斑块，它们的润湿性形成了鲜明的对比，以模拟和优化所谓的天牛的自然捕雾能力。根据收集到的水的量得出的雾收集结果在所有样品之间没有显著差异，因为与样品的润湿特性相比，“风”的影响被发现是更主要的因素。然而，对实验的视频分析揭示了水收集和水去除机制的差异，并得出结论，在评估雾收集实验中的各种竞争机制方面，水收集结果比水收集结果更有帮助。关于表面润湿性的分析分别基于液滴在表面上滚动和向空气中滚动。所有图案化的和大多数非图案化的样品都表现出结合而不是滚动的液滴运动。较大的非球形聚结液滴具有不规则的三重线形状，跨越了我们所有表面的表面图案，这表明表面潜在的图案对这些表面上液滴的行为没有主导影响。(C)2013爱思唯尔B.V.保留所有权利。
This work examines the fog-harvesting ability of patterned and non-patterned samples in spray chamber experiments. The samples were prepared from different materials and the patterns under investigation were channels, hydrophobic patches and hydrophilic patches of contrasting wettability to mimic and optimize the alleged natural fog-harvesting ability of the Stenocara beetle. Fog-harvesting results based on the amount of collected water showed no significant differences among all samples, as the influence of "wind" was found to be the more dominant factor compared to the samples' wetting characteristics. Video analysis of the experiments, however, revealed differences in the water collection and water removal mechanisms and were concluded to be more helpful than water collection results in the assessment of the various competing mechanisms in fog-harvesting experiments. The analysis with regard to surface wettability is based on drop rolling on the surface and roll-off into air, respectively. All patterned and most non-patterned samples exhibited drop motion by coalescence rather than rolling. Larger coalesced drops of non-spherical shape with irregular triple line shapes span the surface pattern on all our surfaces, which suggests that the underlying pattern of the surface has no dominant effect on the behavior of the droplets on these surfaces. (C) 2013 Elsevier B. V. All rights reserved.