Journal
BIOINSPIRATION & BIOMIMETICS
Volume 10, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1748-3190/10/1/016004
Keywords
biomimetics; fog harvesting; microstructure; surface wettability
Funding
- Graduate School of Bionics under the PhD program (DFG Graduiertenkolleg GRK1572): Bionics-Interaction Across Boundaries to the Environment, in the University of Bonn, Germany - German Research Foundation (DFG)
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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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