Fog collecting biomimetic surfaces: Influence of microstructure and wettability

被引：87

作者：

Azad, M. A. K. ^{[1
]}

Ellerbrok, D. ^{[1
]}

Barthlott, W. ^{[1
]}

Koch, K. ^{[2
]}

机构：

[1] Univ Bonn, Nees Inst Biodivers Plants, D-53115 Bonn, Germany

[2] Rhine Waal Univ Appl Sci, D-47533 Kleve, Germany

来源：

BIOINSPIRATION & BIOMIMETICS | 2015年 / 10卷 / 01期

关键词：

biomimetics; fog harvesting; microstructure; surface wettability; WATER COLLECTION; LEAF SURFACE; FABRICATION; EVOLUTIONARY; ABILITY; IMPACT; DROPS;

D O I：

10.1088/1748-3190/10/1/016004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyzed the fog collection efficiency of three different sets of samples: replica (with and without microstructures), copper wire (smooth and microgrooved) and polyolefin mesh (hydrophilic, superhydrophilic and hydrophobic). The collection efficiency of the samples was compared in each set separately to investigate the influence of microstructures and/or the wettability of the surfaces on fog collection. Based on the controlled experimental conditions chosen here large differences in the efficiency were found. We found that microstructured plant replica samples collected 2-3 times higher amounts of water than that of unstructured (smooth) samples. Copper wire samples showed similar results. Moreover, microgrooved wires had a faster dripping of water droplets than that of smooth wires. The superhydrophilic mesh tested here was proved more efficient than any other mesh samples with different wettability. The amount of collected fog by superhydrophilic mesh was about 5 times higher than that of hydrophilic (untreated) mesh and was about 2 times higher than that of hydrophobic mesh.

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