Designing bioinspired surfaces for water collection from fog

Gurera, Dev; Bhushan, Bharat

doi:10.1098/rsta.2018.0269

Cited by 35 publications

(88 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The curvature gradient along the cones produces Laplace pressure gradient responsible for the movement of droplets. Several investigations have been carried out to mimic the conical spines in order to increase the water collection rate from fog [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Optimization of bioinspired triangular patterns for water condensation and transport

Song

Bhushan

2019

Phil. Trans. R. Soc. A.

Self Cite

View full text Add to dashboard Cite

Water condenses on a surface in ambient environment if the surface temperature is below the dew point. For water collection, droplets should be transported to storage before the condensed water evaporates. In this study, Laplace pressure gradient inspired by conical spines of cactus plants is used to facilitate the transport of water condensed in a triangular pattern to the storage. Droplet condensation, transportation and water collection rate within the bioinspired hydrophilic triangular patterns with various lengths and included angles, surrounded by superhydrophobic regions, were explored. The effect of relative humidity was also explored. This bioinspired technique can be used to develop efficient water collection systems. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology (part 2)’.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimization of bioinspired triangular patterns for water condensation and transport

Song

Bhushan

2019

Phil. Trans. R. Soc. A.

Self Cite

View full text Add to dashboard Cite

show abstract

“…2 Then, fog collection from the atmosphere has been widely considered by researchers, [3][4][5][6][7][8] and it is an effective way to overcome water scarcity in arid and semi-arid areas. [9][10][11][12] Hence, various biomimetic fog collection materials inspired by the Namib desert beetle, [13][14][15][16][17] Cactus, [18][19][20] Nepenthes [21][22][23] and Spider silk [24][25][26][27] have gained considerable attention recently. For instance, Chen et al 28 provided a superhydrophilic/superhydrophobic hybrid lm inspired by the Namib desert beetle, and this hybrid lm coated with Ag/TiO 2 nanoparticles exhibited excellent water collecting ability.…”

Section: Introductionmentioning

confidence: 99%

Beetle-like droplet-jumping superamphiphobic coatings for enhancing fog collection of sheet arrays

Wang

Zeng

et al. 2020

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…It has been found that when collecting water from fog, other factors also play a role in droplet movement. These other factors are gravity and droplet coalescence [5,6]. The roles played by Laplace pressure gradient, gravity and coalescence need to be quantified.…”

Section: Introductionmentioning

confidence: 99%

“…This pressure gradient within the droplet facilitates droplet movement toward the base of the spine where it can be collected by the cactus. There have been numerous attempts to create a water collector inspired by the cactus [2][3][4][5][6][7][8]. These studies have found that a cone or a triangular pattern is able to transport water droplets to its base because of a curvature gradient creating a Laplace pressure gradient inside of the droplets.…”

Section: Introductionmentioning

confidence: 99%

Water droplet dynamics on bioinspired conical surfaces

Schriner

Bhushan

2019

Phil. Trans. R. Soc. A.

Self Cite

View full text Add to dashboard Cite

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)’.

show abstract

Designing bioinspired surfaces for water collection from fog

Abstract: One contribution of 14 to a theme issue 'Bioinspired materials and surfaces for green science and technology'.

Cited by 35 publications

References 17 publications

Optimization of bioinspired triangular patterns for water condensation and transport

Optimization of bioinspired triangular patterns for water condensation and transport

Beetle-like droplet-jumping superamphiphobic coatings for enhancing fog collection of sheet arrays

Water droplet dynamics on bioinspired conical surfaces

Contact Info

Product

Resources

About