Bioinspired Integrative Surface with Hierarchical Texture and Wettable Gradient-Driven Water Collection

Li, Jing; Zhou, Yingluo; Cong, Juping; Xu, Chengyu; Ren, Luquan

doi:10.1021/acs.langmuir.0c02638

Cited by 23 publications

(11 citation statements)

References 53 publications

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“…Inspired by the hierarchical microchannel structure of the Sarracenia trichome to capture fog and transport water, excellent fog collection efficiency is achieved by structuring a series of different high and low ribbed hierarchical textures on the surface. [ 126 ]…”

Section: Bionic Fog Collecting Materials and The Creatures That Inspi...mentioning

confidence: 99%

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Special Wettability Materials Inspired by Multiorganisms for Fog Collection

Mei

Guo

2022

Adv Materials Inter

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At present, the shortage of fresh water resources has become a serious problem that human beings have to face. Especially in some arid areas, water shortage has threatened human existence. The discovery that some organisms can survive in extremely arid areas by trapping water in fog has inspired research into bionic water harvesting materials. The emergence of such biomimetic materials offers a potential strategy for tackling the freshwater crisis. This paper reviews the mechanism of some organisms’ water collecting function and special liquid handling ability and the research progress of biomimetic fog‐collecting materials. In addition, the bionic water collecting materials which creatively combine the advantages of various organisms are introduced in detail. It is hoped that these innovative combinations can bring inspiration to the design of fog collecting materials in the future. Finally, the research and development prospects of materials inspired by multiorganisms are prospected.

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Section: Bionic Fog Collecting Materials and The Creatures That Inspi...mentioning

confidence: 99%

mentioning

confidence: 99%

Special Wettability Materials Inspired by Multiorganisms for Fog Collection

Mei

Guo

2022

Adv Materials Inter

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“…Bionics have been greatly developed, and artificial superhydrophobic surfaces(SHS) are constantly synthesized in recent years. − The artificial SHS has a significant impact in the fields of anti-icing, , anti-fogging, water collection, , and drag reduction. − Among them, the drag reduction of the SHS has achieved great development. The bionic superhydrophobic coating opens up the way for the drag reduction of ships.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Self-Healing Superhydrophobic Surface for Underwater Drag Reduction

et al. 2022

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The self-healing superhydrophobic surfaces have attracted great interest owing to restoring superhydrophobicity without preparation crafts. However, the self-healing superhydrophobic surface still faces the dilemma of long repairing time. Especially in aqueous environments, superhydrophobic surfaces are highly susceptible to contamination and damage. In the current study, a superhydrophobic surface with ultrafast repairability was developed, which apply for drag reduction in aqueous medium. The prepared superhydrophobic surface can recover superhydrophobicity in only 30 s after severe physical and chemical damage. In addition, this research pioneered the combination of superhydrophobicity and porous structures for underwater drag reduction. The study of drag reduction confirms that the superhydrophobic surface can reduce the frictional drag by about 43% in the water. However, the drag reduction rate of the superhydrophobic surface with the porous structure can be improved to 76% due to increased stability of the air layer. More importantly, the porous structure with the average pore size of 50 μm has the most excellent stability through further experiments on the underwater air layer. This is attributed to the proper size of the pore to effectively balance the capillary force and resist wetting in the marginal region. This study will bring inspiration for the large-scale application of superhydrophobic surfaces and long-term drag reduction.

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“…Thus, fog collection from the atmosphere is an efficient way to solve the prevalent water-shortage crisis . Inspired by the unique fog collection ability of Namib desert beetle, − cactus, − Nepenthes, − and spider silk, − patterned wetted surfaces were constructed to improve the fog collection rate. For example, Zhang et al prepared a superhydrophobic surface with a wedge-shaped hydrophilic pattern by laser induction and fiber laser ablation technology, and the fog collection rate was up to 16 mg/cm 2 /min .…”

Section: Introductionmentioning

confidence: 99%

Cactus-Inspired Janus Membrane with a Conical Array of Wettability Gradient for Efficient Fog Collection

Song

Dong

et al. 2021

Langmuir

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Fog collection plays an important role in alleviating the global water shortage. Despite great progress in creating bionic surfaces to collect fog, water droplets still could adhere to the microscale hydrophilic region and reach the thermodynamic stable state before falling, which delays the transport of water and hinders the continuous fog collection. Inspired by lotus leaves and cactuses, we designed a Janus membrane that functions to both collect fog from the air and transport it to a certain region. The Janus membrane with opposite wettability contains conical microcolumns with a wettability gradient and hydrophilic copper mesh surface. The apexes of conical microcolumns are superhydrophobic and the rest are hydrophobic. The fog droplets were deposited, coalesced, and directionally transported to the bottom of the conical microcolumns. Then, the droplets unidirectionally passed through the membrane and flowed into the water film on the surface of the copper mesh. The asymmetric structural and wettability merits endow the Janus membrane with an improved fog collection of ∼7.05 g/cm 2 /h. The study is valuable for designing and developing fluid control equipment in fog collection, liquid manipulation, and microfluidics.

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Bioinspired Integrative Surface with Hierarchical Texture and Wettable Gradient-Driven Water Collection

Cited by 23 publications

References 53 publications

Special Wettability Materials Inspired by Multiorganisms for Fog Collection

Special Wettability Materials Inspired by Multiorganisms for Fog Collection

Ultrafast Self-Healing Superhydrophobic Surface for Underwater Drag Reduction

Cactus-Inspired Janus Membrane with a Conical Array of Wettability Gradient for Efficient Fog Collection

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