Green self-propelling swimmer driven by rain droplets

Chen, Yang; Yan, Defeng; Li, Rui; Lu, Yao; Zhao, Ding; Deng, Xu; Song, Jinlong

doi:10.1016/j.nanoen.2022.107543

Cited by 32 publications

(14 citation statements)

References 30 publications

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“…72 Different from the discrete control of a single droplet intended for the droplet manipulation platform, the droplet-based MEMS systems typically require the continuous governing of droplet motion using arrayed patterned surfaces. 71 In particular, the droplet friction property of the surface is crucial for energy transmission, determining the energy utilization or consumption rate. Therefore, in this section, we quantitatively characterize the tribological properties of droplets on the SLIPS array patterned surfaces to acquire the basic rules of the friction control of droplet-based MEMS parts, such as the dropletbased mini clutch.…”

Section: Resultsmentioning

confidence: 99%

“…The above results show that a superamphiphobic surface patched with the SLIPS pattern enables excellent sliding anisotropy of a deposited droplet, which could be used to implement droplet manipulations precisely. Recently, the basic understanding of droplet interfacial phenomenon prompted some cutting‐edge applications in the droplet‐based microelectromechanical system (MEMS), such as droplet‐based generators, 11 droplet‐based self‐driven mini boats, 70,71 and liquid ring thrust bearing 72 . Different from the discrete control of a single droplet intended for the droplet manipulation platform, the droplet‐based MEMS systems typically require the continuous governing of droplet motion using arrayed patterned surfaces 71 .…”

Section: Resultsmentioning

confidence: 99%

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Bionic surface diode for droplet steering

Yang

et al. 2023

Droplet

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Control of droplet sliding and its interfacial behavior such as sliding resistance and friction have important applications in microfluidic and energy-related fields. Nature provides many examples of interface-driven droplet sliding control; yet, to date, the continuous governing of the multiphase process and precise steering of droplet sliding remain challenging. Here, directional-dependent ultraslippery patterned surfaces with significant droplet sliding anisotropy were created by coordinating the heterogeneous wettability of the back of the dessert beetle, directionaldependent architecture of the butterfly wing, and ultraslippery configuration of the Nepenthes alata. Analysis of the sliding resistance on typical ultraslippery patterned surfaces reveals that the directional-dependent triple phase line (TPL) immigration on the ultraslippery patterns dominates the strong sliding anisotropy, which can be modeled using the classic Furmidge equation. In particular, the sliding anisotropy for the semicircular ultraslippery patterned surface shows threefold higher than that of natural butterfly wings due to the most significant difference in TPL immigration in two opposite directions, which enables the simultaneous handling of multiple droplets without mass loss and steering of droplet sliding/friction. This work may transform the design space for the control of multiphase interface motion and the development of new lab-on-a-chip and droplet-based microsystems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Bionic surface diode for droplet steering

Yang

et al. 2023

Droplet

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“…Water turns into ice when its temperature falls below its freezing point. Ice formation and accumulation on the surfaces of transportation facilities, − communication facilities, and energy facilities − can cause tens of billions of dollars of damage each year. Ice accumulation also compromises the mechanical integrity and energy conversion efficiency of these facilities.…”

Section: Introductionmentioning

confidence: 99%

In Situ Activation of Superhydrophobic Surfaces with Triple Icephobicity at Low Temperatures

Sun

Wang

Liang

et al. 2022

ACS Appl. Mater. Interfaces

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Superhydrophobic surfaces have been widely studied due to their potential applications in aerospace fields. However, superhydrophobic surfaces with excellent water-repellent, anti-icing, and icephobic performances at low temperatures have rarely been reported. Herein, superhydrophobic surfaces with heating capability were prepared by etching square micropillar arrays on the surface of multiwalled carbon nanotube (MWCNT)/poly(dimethylsiloxane) (PDMS) films. The fabricated superhydrophobic surface has triple icephobicity, which can be activated even at low temperatures. The triple icephobicity is triggered by an applied voltage to achieve excellent water-repellent and icephobic capabilities, even at −40 °C. Additionally, theoretical calculations reveal that a droplet on a superhydrophobic surface loses heat at a rate of 8.91 × 10–5 J/s, which is 2 orders of magnitude slower than a flat surface (2.15 × 10–3 J/s). Also, at −40 °C, the mechanical interlocking force formed between the superhydrophobic surface and ice can be released by the heating property of the superhydrophobic surface. This low-energy, multifunctional superhydrophobic surface opens up new possibilities for bionic smart multifunctional materials in icephobic applications.

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“…In recent years, bionics has been made breakthroughs in various fields. [18][19][20][21] Su et al explored the function relationship between natural lip-ring tissue and biomimetic adsorption materials. It provided a reference for future research on natural and biomimetic materials with high adsorption performance, and might provide new design ideas for future adhesion devices, robot structures, and flexible drives.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, bionics has been made breakthroughs in various fields 18–21 . Su et al explored the function relationship between natural lip‐ring tissue and biomimetic adsorption materials.…”

Section: Introductionmentioning

confidence: 99%

Design of bionic tire tread compounds with pit structures and the improvement mechanism of wear and wet grip resistance

Mao

Sun

Yang

et al. 2022

J of Applied Polymer Sci

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Wear resistance and wet grip resistance are the main properties of tires, but they are often contradictory and difficult to synergize. In this paper, drawing on the bionics concept, the bionic topography of the pits was introduced into the design of the tread rubber structure, and the synergistic improvement mechanism of the tire tread rubber with the bionic pit structures was explored. The overall performance improvement of tread compounds provided a new approach. The research showed that the designed high wear resistance tire tread compounds W2 had the best wear resistance, and the high wet grip resistance tire tread compounds S3 had the best‐wet grip resistance. When the diameter of the bionic unit was 2.5 mm and the pit number was 6, the wear resistance rate of the sample was the highest (about 11.86%), and the wear amount was 70.6; the maximum wet friction coefficient of the sample sliding on the sandpaper surface and the smooth glass surface was 0.834 and 0.71, the corresponding wet grip resistance improvement rates were also 11.89% and 12.34%, respectively. Experiments have proved that the tire tread compounds with the bionic pit structures composed of W2S3 can effectively synergistically improve wet grip resistance and wear resistance.

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Green self-propelling swimmer driven by rain droplets

Cited by 32 publications

References 30 publications

Bionic surface diode for droplet steering

Bionic surface diode for droplet steering

In Situ Activation of Superhydrophobic Surfaces with Triple Icephobicity at Low Temperatures

Design of bionic tire tread compounds with pit structures and the improvement mechanism of wear and wet grip resistance

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