Dropwise condensation on bioinspired hydrophilic-slippery surface

Guo, Lin; Tang, G.H.

doi:10.1039/c8ra08190e

Cited by 34 publications

(22 citation statements)

References 45 publications

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“…That was to say that this kind of surface, which combined with the excellent characteristics of three kinds of biological water collection, work synergistically and is far superior to other single synthetic surfaces (Fig. 16e) [169,170] . This also opened us new ideas for the development of our bionic water-collecting materials.…”

Section: Nepenthes Bionicsmentioning

confidence: 95%

Bio-inspired Fog Harvesting Materials: Basic Research and Bionic Potential Applications

2021

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With the explosive growth of the world’s population and the rapid increase in industrial water consumption, the world’s water supply has fallen into crisis. The shortage of fresh water resources has become a global problem, especially in arid regions. In nature, many organisms can collect water from foggy water under harsh conditions, which provides us with inspiration for the development of new functional fog harvesting materials. A large number of bionic special wettable synthetic surfaces are synthesized for water mist collection. In this review, we introduce some water collection phenomena in nature, outline the basic theories of biological water harvesting, and summarize six mechanisms of biological water collection: increased surface wettability, increased water transmission area, long-distance water delivery, water accumulation and storage, condensation promotion, and gravity-driven. Then, the water collection mechanisms of three typical organisms and their synthesis are discussed. And their function, water collection efficiency, new developments in their biomimetic materials are narrated, which are cactus, spider and desert beetles. The study of multiple bionics was inspired by the discovery of Nepenthes’ moist and smooth peristome. The excellent characteristics of a variety of biological water collection structures, combined with each other, are far superior to other single synthetic surfaces. Furthermore, the main problems in the preparation and application of biomimetic fog harvesting materials and the future development trend of materials fog harvesting are prospected.

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Section: Nepenthes Bionicsmentioning

confidence: 95%

Bio-inspired Fog Harvesting Materials: Basic Research and Bionic Potential Applications

2021

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“…One of the typical properties of the lubricant-impregnated surface is the extremely small contact angle hysteresis as reported in ref 46. Guo and Tang also reported a hydrophilic lubricant-impregnated surface having a very small sliding angle as low as 2°, 47,48 which is able to enhance the condensation heat transfer more efficiently compared with the traditional lubricant-impregnated surface. Considering the effects of lubricant and nanostructure damage, the characteristics of droplet motion on the above six types of surfaces are further investigated.…”

Section: ■ Numerical Methodologymentioning

confidence: 99%

Failure and Recovery of Droplet Nucleation and Growth on Damaged Nanostructures: A Molecular Dynamics Study

Dong

Guo

2020

Langmuir

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The condensate flooding during dropwise condensation causes serious deterioration in heat transfer performance. In this study, the three-dimensional large-scale molecular dynamics simulation is carried out to investigate the droplet state transition from local flooding mode to Wenzel or from Wenzel to Cassie due to the droplet coalescence under the effect of nanostructure size. In particular, the effect of nanostructure breakage on droplet nucleation and growth is discussed to reveal the mechanism of dropwise condensation heat transfer deterioration. As a potential solution, the lubricant-impregnated surface is proposed to recover the preferred Cassie state by regulating the dynamic wetting characteristics of droplets, and thus the detrimental effect of nanostructure breakage could be effectively avoided.

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“…然而, 他们注意到, 随着时间的推移, 由于润滑剂耗尽, 冷凝模式从DWC变为FWC. Guo和Tang [149] 制备了同时具有小接触角和小滚动角的亲滑表面, 能增大成核密度并快速输运液滴, 氮气含量为9.2%时, 表面传热系数比普通超疏水表面增大113.8%~120.3%. Dai等人 [150] 制备了由纳米纹理定向微槽组成的亲水浸油表面, 该表面具有亲水的表面化学性质、光滑的界面、定向结构和用于液滴成核和运动的大表面积.…”

Section: 年 Hu和tangunclassified

Advances in vapor dropwise condensation heat transfer

Dong

Guo

et al. 2020

Chin. Sci. Bull.

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Dropwise condensation on bioinspired hydrophilic-slippery surface

Abstract: A hydrophilic-slippery copper surface is fabricated, reconciling two required factors, enhanced condensation and efficient water transport. Nucleation rate, droplet mobility and heat transfer are enhanced by the small contact angle and sliding angle.

Cited by 34 publications

References 45 publications

Bio-inspired Fog Harvesting Materials: Basic Research and Bionic Potential Applications

Bio-inspired Fog Harvesting Materials: Basic Research and Bionic Potential Applications

Failure and Recovery of Droplet Nucleation and Growth on Damaged Nanostructures: A Molecular Dynamics Study

Advances in vapor dropwise condensation heat transfer

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