How Micro-/Nanostructure Evolution Influences Dynamic Wetting and Natural Deicing Abilities of Bionic Lotus Surfaces

Qin, Ying-zhi; Zhu, Zewei; Tan, Sheng; Luo, Yimin; Luo, Zhen

doi:10.1021/acs.langmuir.0c00145

Cited by 32 publications

(21 citation statements)

References 34 publications

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“…Reduction of ice accumulation is highly crucial, and ice adhesion force is one of the critical parameters. If ice adhesion is weak enough and the externally applied shear forces can separate the ice from the interface, deicing or anti-icing can be easily achieved. , Over the past several decades, sustainable solutions for anti/deicing has been extensively investigated, − which can be grouped into two categories, that is, active and passive. Active anti/deicing methods disrupt the ice–structure interface in order to achieve deicing effects, using methods such as resistance heating, hot air, radiation, deicing fluids, electro-impulsive/expulsive, and ultrasonic techniques. − These methods often require significant energy or chemical consumption, along with complex systems with low efficiencies.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Ice Adhesion Using Surface Acoustic Waves: Nanoscale Vibration and Interface Heating Effects

Zeng

Yan

et al. 2021

Langmuir

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Ice accumulation causes great risks to aircraft, electric power lines, and wind-turbine blades. For the ice accumulation on structural surfaces, ice adhesion force is a crucial factor, which generally has two main sources, for exampple, electrostatic force and mechanical interlocking. Herein, we present that surface acoustic waves (SAWs) can be applied to minimize ice adhesion by simultaneously reducing electrostatic force and mechanical interlocking, and generating interface heating effect. A theoretical model of ice adhesion considering the effect of SAWs is first established. Experimental studies proved that the combination of nanoscale vibration and interface heating effects lead to the reduction of ice adhesion on the substrate. With the increase of SAW power, the electrostatic force decreases due to the increase of dipole spacings, which is mainly attributed to the SAW induced nanoscale surface vibration. The interface heating effect leads to the transition of the locally interfacial contact phase from solid–solid to solid–liquid, hence reducing the mechanical interlocking of ice. This study presents a strategy of using SAWs device for ice adhesion reduction, and results show a considerable potential for application in deicing.

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Section: Introductionmentioning

confidence: 99%

Reduction of Ice Adhesion Using Surface Acoustic Waves: Nanoscale Vibration and Interface Heating Effects

Zeng

Yan

et al. 2021

Langmuir

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“…To further explain the roll off behavior of the freezing droplet on the ST@CA/CC surface, we perform a force analysis, as shown in Figure b. Based on an existing study, we assume that the freezing droplet on inclined surfaces is only affected by gravity and adhesion. The adhesion force is expressed as follows: where F water is the adhesion force of the water–solid interface and F ice is the adhesion force of the ice–solid interface.…”

Section: Resultsmentioning

confidence: 99%

Carbon-Based Photothermal Superhydrophobic Materials with Hierarchical Structure Enhances the Anti-Icing and Photothermal Deicing Properties

Xie

Wang

Geng

et al. 2021

ACS Appl. Mater. Interfaces

156

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Ice formation on the surface of outdoor equipment brings significant inconvenience to human life and production. Superhydrophobic materials with the micro-nanostructure are considered to be effective anti-icing materials. However, repeated icing and deicing processes will destroy the structure and lose anti-icing properties. Herein, low-cost, durable, high-efficiency photothermal superhydrophobic materials were prepared by electrochemical deposition and silanization treatment methods. Combined with the black-body property of carbon materials and the micro-nano hierarchical structure, the as-prepared material has excellent photothermal and superhydrophobic properties. The surface temperature can rise to 90 °C, and the freezing droplets can melt in 100 s under 100 mW/cm 2 of sunlight illumination. The superhydrophobic property endows the material with excellent anti-icing performance, and the icing delay time is as long as 3600 s. The melted water droplet can quickly roll off due to the low adhesion of the superhydrophobic surface, which avoids the refreezing of the melted droplet and enhances the photothermal conversion performance. We innovatively use the elemental tracer method to understand the melted water droplet roll off mechanism on inclined surfaces. In addition, the heat transfer model of anti-icing and photothermal deicing processes are established to confirm that the heat required for melting ice during the deicing process is mainly generated by photothermal materials. Finally, the feasibility of practical application of the material was verified by the anti-icing/ deicing experiment of a wind turbine blade and ice/frost layer melting experiment. It concludes that the superior anti-icing and deicing properties are realized using the high photothermal conversion and excellent superhydrophobic properties of the prepared photothermal superhydrophobic materials. This study provides a perspective for constructing micro-nano hierarchical structures on the surface and combining them with the abundant solar energy in nature to develop photothermal anti-icing materials for practical application.

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“…Microscale and nanoscale textures can form a hierarchically rough structure, a substantial contributor to the hydrophobicity of a surface. The wettability can be changed by the microscale or nanoscale texture [37,38]. The innate defects of a surface and the textures influence the surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Metal surface wettability modification by nanosecond laser surface texturing: A review

Liu

Niu

Lei

et al. 2022

Biosurface and Biotribology

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Laser surface texturing (LST) is a non‐contact manufacturing process for fabricating functional surfaces in a manner that improves the corresponding wettability, and is widely used in biomedicine and industry. Laser surface texturing is a facile approach that is compatible with various materials, can result in a hierarchical texture, and enables a high degree of surface wetting (i.e., extreme wetting). In addition to surface structures, surface chemical modification is a primary factor in producing extreme wetting surfaces. This review discusses the effects of various surface textures and surface chemistries on wettability. Optimal laser parameters for the desired surface texture are based on the fundamental wettability and laser mechanism. In particular, bumps in the morphology are conducive to obtaining extreme wetting. Diverse surface chemical strategies result in extreme wetting by different mechanisms. This paper makes a rigorous evaluation of the laser parameters and optimal surface chemical modifications by elucidating the relationships between the surface structure, surface chemical modification, and wettability, and in so doing, determines the final wettability. The unresolved problems of LST are presented in the conclusion. This review provides guidance, development directions, and an integrated framework for LST, which will be useful for fabricating extreme wetting surfaces on various metals.

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How Micro-/Nanostructure Evolution Influences Dynamic Wetting and Natural Deicing Abilities of Bionic Lotus Surfaces

Cited by 32 publications

References 34 publications

Reduction of Ice Adhesion Using Surface Acoustic Waves: Nanoscale Vibration and Interface Heating Effects

Reduction of Ice Adhesion Using Surface Acoustic Waves: Nanoscale Vibration and Interface Heating Effects

Carbon-Based Photothermal Superhydrophobic Materials with Hierarchical Structure Enhances the Anti-Icing and Photothermal Deicing Properties

Metal surface wettability modification by nanosecond laser surface texturing: A review

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