High-efficiency water collection on biomimetic material with superwettable patterns

Zhu, Hai; Yang, Fuchao; Li, Jing; Guo, Zhiguang

doi:10.1039/c6cc05857d

Cited by 85 publications

(45 citation statements)

References 23 publications

(24 reference statements)

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“…Learning from nature has long been a source of bioinspiration for scientists and engineers to design and construct novel materials and devices. Inspired by the Namib Desert beetle with the unique water‐harvesting ability, many different synthesis strategies have been developed to fabricate 2D superwettable patterned surfaces for water harvesting . However, for practical applications, it is very desirable to develop new systems/materials with high water‐collecting efficiency and low fabrication cost.…”

Section: Introductionmentioning

confidence: 99%

Desert Beetle‐Inspired Superwettable Patterned Surfaces for Water Harvesting

Yun

Wang³

et al. 2017

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114

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With the impacts of climate change and impending crisis of clean drinking water, designing functional materials for water harvesting from fog with large water capacity has received much attention in recent years. Nature has evolved different strategies for surviving dry, arid, and xeric conditions. Nature is a school for human beings. In this contribution, inspired by the Stenocara beetle, superhydrophilic/superhydrophobic patterned surfaces are fabricated on the silica poly(dimethylsiloxane) (PDMS)-coated superhydrophobic surfaces using a pulsed laser deposition approach with masks. The resultant samples with patterned wettability demonstrate water-harvesting efficiency in comparison with the silica PDMS-coated superhydrophobic surface and the Pt nanoparticles-coated superhydrophilic surface. The maximum water-harvesting efficiency can reach about 5.3 g cm h . Both the size and the percentage of the Pt-coated superhydrophilic square regions on the patterned surface affect the condensation and coalescence of the water droplet, as well as the final water-harvesting efficiency. The present water-harvesting strategy should provide an avenue to alleviate the water crisis facing mankind in certain arid regions of the world.

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Section: Introductionmentioning

confidence: 99%

Desert Beetle‐Inspired Superwettable Patterned Surfaces for Water Harvesting

Yun

Wang³

et al. 2017

Small

185

114

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show abstract

“…Water-collecting methods for superhydrophobic surfaces with hydrophilic patterns have been well understood, which is inspired by the efficient fog-harvesting behavior of Stenocara beetles in the Namib Desert [31]. A superhydrophilic-superhydrophobic patterned surface that was similar to the back of a desert beetle can be applied for high-efficient fog harvest in the drought environment [32][33][34]. Zhang's group used ink-jet printing technology to make superhydrophilic patterns on the superhydrophobic surface of the desert beetle, showing powerful catchment capability.…”

Section: Introductionmentioning

confidence: 99%

A universal method to create surface patterns with extreme wettability on metal substrates

Sun

Chen

Song

et al. 2019

Journal of Colloid and Interface Science

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Extreme wettability surfaces have attracted more and more attention due to their practical applications, however, few reports have shown a universal method to create surface patterns with extreme wettability on a variety of metals. In this paper, a mask-assisted dual-chemical-processing approach without special modification is used to prepare the extreme wettability patterns on various metal substrates. Fabrication of superhydrophilic-superhydrophobic patterns on five kinds of metal substrates of Al, Ti, steel, Zn and Mg alloy proved the versatility of this method. The extreme wettability patterns prepared by this method were applied to fog harvest and we found the big differences in the collection efficiency of various metal surface patterns.

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“…Guo et al . 22 prepared superhydrophilic surfaces with circle superhydrophobic patterns by site-selectively modifying superhydrophilic Cu(OH) 2 nano-needle structures with n-octadecylthiol (ODT)/ethanol solution. These fabricated patterned surfaces were macroscopically similar to a desert beetle’s back surface showing superior water harvest efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Twice Electrochemical-Etching Method to Fabricate Superhydrophobic-Superhydrophilic Patterns for Biomimetic Fog Harvest

Yang

Song

Liu

et al. 2017

Sci Rep

114

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Superhydrophobic-superhydrophilic patterned surfaces have attracted more and more attention due to their great potential applications in the fog harvest process. In this work, we developed a simple and universal electrochemical-etching method to fabricate the superhydrophobic-superhydrophilic patterned surface on metal superhydrophobic substrates. The anti-electrochemical corrosion property of superhydrophobic substrates and the dependence of electrochemical etching potential on the wettability of the fabricated dimples were investigated on Al samples. Results showed that high etching potential was beneficial for efficiently producing a uniform superhydrophilic dimple. Fabrication of long-term superhydrophilic dimples on the Al superhydrophobic substrate was achieved by combining the masked electrochemical etching and boiling-water immersion methods. A long-term wedge-shaped superhydrophilic dimple array was fabricated on a superhydrophobic surface. The fog harvest test showed that the surface with a wedge-shaped pattern array had high water collection efficiency. Condensing water on the pattern was easy to converge and depart due to the internal Laplace pressure gradient of the liquid and the contact angle hysteresis contrast on the surface. The Furmidge equation was applied to explain the droplet departing mechanism and to control the departing volume. The fabrication technique and research of the fog harvest process may guide the design of new water collection devices.

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High-efficiency water collection on biomimetic material with superwettable patterns

Cited by 85 publications

References 23 publications

Desert Beetle‐Inspired Superwettable Patterned Surfaces for Water Harvesting

Desert Beetle‐Inspired Superwettable Patterned Surfaces for Water Harvesting

A universal method to create surface patterns with extreme wettability on metal substrates

A Twice Electrochemical-Etching Method to Fabricate Superhydrophobic-Superhydrophilic Patterns for Biomimetic Fog Harvest

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