Hybrid engineered materials with high water-collecting efficiency inspired by Namib Desert beetles

2016 ◽  
Vol 52 (41) ◽  
pp. 6809-6812 ◽  
Author(s):  
Hai Zhu ◽  
Zhiguang Guo
Keyword(s):  
High Water ◽  
Namib Desert ◽  
Collection Rate ◽  
Water Collection ◽  
Self Cleaning ◽  
Desert Beetle ◽  
Engineered Materials ◽  
Collecting Efficiency

A hybrid superhydrophobic material was successfully fabricated inspired by the Namib Desert beetle, which showed the efficient fog capture with a water collection rate of 1309.9 mg h−1 cm−2. And the sample possessed favorable robustness and self-cleaning property.

A fog-collecting surface mimicking the Namib beetle: its water collection efficiency and influencing factors

Nanoscale ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 6921-6936 ◽  
Author(s):  
Jun Lei ◽  
Zhiguang Guo
Keyword(s):  
Surface Structure ◽  
Influencing Factors ◽  
Collection Efficiency ◽  
Surface Wettability ◽  
Namib Desert ◽  
Surface Distribution ◽  
Collection Rate ◽  
Water Collection

In the Namib Desert, beetles can obtain water by fog-basking. In this review, we discussed the water collection rate of surfaces inspired by beetles from three aspects: surface wettability, surface structure and surface distribution.

scholarly journals Water Harvest from Air Inspired by the Namib Desert Beetle

2017 ◽  
Vol 68 (3) ◽  
pp. 127-131
Author(s):  
Yuji HIRAI ◽  
Masatsugu SHIMOMURA
Keyword(s):  
Namib Desert ◽  
Desert Beetle

Namib desert beetle inspired special patterned fabric with programmable and gradient wettability for efficient fog harvesting

2021 ◽  
Vol 61 ◽  
pp. 85-92 ◽  
Author(s):  
Zhihua Yu ◽  
Huimei Zhang ◽  
Jianying Huang ◽  
Shuhui Li ◽  
Songnan Zhang ◽  
...  
Keyword(s):  
Namib Desert ◽  
Desert Beetle

scholarly journals Designing bioinspired surfaces for water collection from fog

2018 ◽  
Vol 377 (2138) ◽  
pp. 20180269 ◽  
Author(s):  
Dev Gurera ◽  
Bharat Bhushan
Keyword(s):  
Flat Surface ◽  
Unit Area ◽  
Water Repellency ◽  
Vertical Axis ◽  
Collection Rate ◽  
Flat Surfaces ◽  
Single Cone ◽  
Water Collection ◽  
The Difference ◽  
Conical Surfaces

A systematic study is presented on various water collectors, bioinspired by desert beetles, desert grass and cacti. Three water collecting mechanisms including heterogeneous wettability, grooved surfaces, and Laplace pressure gradient, were investigated on flat, cylindrical, conical surfaces, and conical array. It is found that higher water repellency in flat surfaces results in higher water collection rate and inclination angle (with respect to the vertical axis) has little effect. Surfaces with heterogeneous wettability have higher water collection rate than surfaces with homogeneous wettability. Both cylindrical and conical surfaces resulted in comparable water collection rate. However, only the cone transported the water droplets to its base. Heterogeneity, higher inclination and grooves increased the water collection rate. A cone has a higher collection rate per unit area than a flat surface with the same wettability. An array of cones has higher collection rate per unit area than a single cone, because droplets in a conical array coalesce, leading to higher frequency of droplets falling. Adding heterogeneity further increases the difference. Based on the findings, scaled-up designs of beetle-, grass- and cactus-inspired surfaces and nets are presented. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology’.

scholarly journals Hydrophilic nanofibers in fog collectors for increased water harvesting efficiency

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22335-22342
Author(s):  
Joanna Knapczyk-Korczak ◽  
Piotr K. Szewczyk ◽  
Daniel P. Ura ◽  
Katarzyna Berent ◽  
Urszula Stachewicz
Keyword(s):  
Water Harvesting ◽  
Fog Water ◽  
Collection Rate ◽  
Water Collection ◽  
Harvesting Efficiency

Modification of Raschel meshes used for fog water collectors with PA6 nanofibers allow to obtain 300% higher water collection rate in collecting water from fog.

scholarly journals Water droplet dynamics on bioinspired conical surfaces

2019 ◽  
Vol 377 (2150) ◽  
pp. 20190118 ◽  
Author(s):  
Charles T. Schriner ◽  
Bharat Bhushan
Keyword(s):  
Pressure Gradient ◽  
High Water ◽  
Laplace Pressure ◽  
Conical Surface ◽  
Human Consumption ◽  
Droplet Dynamics ◽  
Water Collection ◽  
Droplet Movement ◽  
Movement Distance ◽  
Conical Surfaces

Cacti use the Laplace pressure gradient due to conical geometry as a mechanism for collecting water from fog. Bioinspired surfaces using conical geometry can be developed for water collection from fog for human consumption. A systematic study is presented which investigates the dynamics of water droplets on a bioinspired conical surface. A series of experiments was conducted where a known volume of droplets was deposited on the cone. This was followed by an investigation into droplet dynamics where the droplets are deposited from fog and the volume is unknown. This includes a study on the macroscopic level as well as the microscopic level. The main parameters that were varied for these tests were the tip angle and the cone orientation. The droplet movement observed was compared relatively. Based on captured videos of droplet movement, distance travelled and velocities were measured. The Laplace pressure gradient, gravity and droplet coalescence were found to be the mechanisms of droplet movement on a conical surface. The findings of this study should be of interest in designing bioinspired surfaces with high water collection. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology (part 2)’.

Fog basking by the Namib Desert beetle, Onymacris unguicularis

Nature ◽  
1976 ◽  
Vol 262 (5566) ◽  
pp. 284-285 ◽  
Author(s):  
WILLIAM J. HAMILTON ◽  
MARY K. SEELY
Keyword(s):  
Namib Desert ◽  
Desert Beetle
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