Super‐Hydrophobic Surfaces: From Natural to Artificial

Feng, Lin; Li, Shuhong; Li, Yingshun; Li, Huanjun; Zhang, Lingjuan; Zhai, Jin; Song, Yanlin; Liu, Biqian; Jiang, Lei; Zhu, Daoben

doi:10.1002/chin.200307200

Cited by 304 publications

(425 citation statements)

References 1 publication

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“…This estimate of the spacing could be treated as a lower bound to design self-cleaning textures meanwhile having the ability to realize mCWC transitions under rain impingement. Moreover, our understandings are consistent with the fact that nature plants such as the lotus leaf has microscale papillae and nanoscale waxes 1.…”

supporting

confidence: 83%

“…Superhydrophobicity is realized by a combination of chemical hydrophobicity and microand/or nanotextures. [1][2][3][4] Materials with superhydrophobicity exhibit ultralow adhesion with water drops, due to the largely reduced solid-liquid contact region with air entrapped at the bottom. As a result, spectacular properties such as self-cleaning, anti-fouling and anti-icing are attainable.…”

Section: Introductionmentioning

confidence: 99%

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Drop Impact on Two-Tier Monostable Superrepellent Surfaces

Shi

Zheng

2019

ACS Appl. Mater. Interfaces

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Superrepellency is a favorable non-wetting situation featured by a dramatically reduced solid/liquid contact region with extremely low adhesion. However, drop impact often brings out a notable extension of the contact region associated with rather enhanced water affinity, such renders irreversible breakdowns of superhydrophobicity. Here, we report an alternative outcome, a repeated Cassie-Wenzel-Cassie (CWC) wetting state transition in the microscale occurs when a drop impacts a two-tier superhydrophobic surface, which exhibits a striking contrast to the conventional perspective. Influences of material parameters on the impact dynamics are quantified. We demonstrate that self-cleaning and dropwise condensation significantly benefit from this outcomedirt particles or small droplets in deep textures can be taken away through the transition. The results reported in this study allows us to promote the strategy to design functional superrepellency materials.

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supporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Drop Impact on Two-Tier Monostable Superrepellent Surfaces

Shi

Zheng

2019

ACS Appl. Mater. Interfaces

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“…the automotive industry for repelling water from windshields or paints 136 , preventing fouling 137 and reducing friction in moving parts 138 ; in the marine industry to prevent fouling 139 ; in the electric power industry to prevent fouling on solar cells 140 ; in biology to prevent bacterial contamination 141,142 , and in the electronic 143 and chemical industries 144 .…”

Section: Wettability Engineeringmentioning

confidence: 99%

Surface engineering for phase change heat transfer: A review

Attinger

Frankiewicz

Betz

et al. 2014

MRS Energy & Sustainability

316

195

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Among numerous challenges to meet the rising global energy demand in a sustainable manner, improving phase change heat transfer has been at the forefront of engineering research for decades. The high heat transfer rates associated with phase change heat transfer are essential to energy and industry applications; but phase change is also inherently associated with poor thermodynamic efficiencies at low heat flux, and violent instabilities at high heat flux. Engineers have tried since the 1930's to fabricate solid surfaces that improve phase change heat transfer. The development of micro and nanotechnologies has made feasible the high-resolution control of surface texture and chemistry over length scales ranging from molecular levels to centimeters. This paper reviews the fabrication techniques available for metallic and siliconbased surfaces, considering sintered and polymeric coatings. The influence of such surfaces in multiphase processes of high practical interest, e.g. boiling, condensation, freezing, and the associated physical phenomena are reviewed. The case is made that while engineers are in principle able to manufacture surfaces with optimum nucleation or thermofluid transport characteristics, more theoretical and experimental efforts are needed to guide the design and cost-effective fabrication of surfaces that not only satisfy the existing technological needs, but also catalyze new discoveries.

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“…Interactions and phenomena at the solid-liquid interface such as wetting and solid-liquid slip have become popular mechanisms for tailoring and designing lubricated contacts [1][2][3][4][5][6][7][8][9][10][11][12][13][14] that are inspired by biomimetic surfaces showing particular functionalities in nature, such as self-cleaning, 15,16 superhydrophobicity, [15][16][17][18][19][20][21] strong adhesion, 15,16,[20][21][22][23][24][25] drag reduction, 15,16,20,21,26,27 and others. [15][16][17]24 There are several tribological studies where it was shown that the friction in lubricated contacts can be tailored by solid-liquid interface interactions and phenomena such as surface energy, [1][2][3][4][5] wetting, 3,…”

Section: Introductionmentioning

confidence: 99%

High‐speed optical imaging of liquid film flow and liquid macro‐slip over free surfaces with different surface energies

Bizjan

Širok

Kalin

2017

Lubrication Science

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High‐speed optical imaging is introduced as a visualization method to investigate the film‐flow properties of liquids with different surface tensions and viscosities (water, poly‐alpha‐olefin oil, and glycerol) over free rotating surfaces with different surface energies and polarities (steel, and two different diamond‐like‐carbon ‐ DLC coatings, i.e. DLC, and F‐DLC). It was found that the polar surface energy strongly influences the structural dynamics of the liquid film's flow and the film's slip. Namely, a decrease in the polar surface energy results in a less stable film with de‐wetting areas and breakups into streams, as well as in a larger amount of film slip, which was most clearly expressed by the F‐DLC. It was also found that the combination of a high surface tension and a low viscosity provides the largest amount of liquid slip, with the most obvious breakup of the liquid film being observed with water, which clearly exhibits these properties.

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Super‐Hydrophobic Surfaces: From Natural to Artificial

Abstract: Inorganic chemistryInorganic chemistry Z 0100 Super-Hydrophobic Surfaces: From Natural to Artificial -[31 refs.]. -(FENG, L.; LI, S.; LI, Y.; LI, H.; ZHANG, L.; ZHAI, J.; SONG, Y.; LIU, B.; JIANG*, L.; ZHU, D.; Adv.

Cited by 304 publications

References 1 publication

Drop Impact on Two-Tier Monostable Superrepellent Surfaces

Drop Impact on Two-Tier Monostable Superrepellent Surfaces

Surface engineering for phase change heat transfer: A review

High‐speed optical imaging of liquid film flow and liquid macro‐slip over free surfaces with different surface energies

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