Spontaneous and Directional Bubble Transport on Porous Copper Wires with Complex Shapes in Aqueous Media

Li, Wenjing; Zhang, Jingjing; Zhang, Xue; Wang, Jingming; Jiang, Lei

doi:10.1021/acsami.7b15681

Cited by 23 publications

(16 citation statements)

References 37 publications

(52 reference statements)

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“…Bubbles in aqueous media are common and inevitable in agriculture, industrial processes, energy, and the environment. − They can generate, grow, transport, coalesce, and release and can also be absorbed and collected on the solid/liquid interfaces. These bubble-related behaviors are crucial to the performance of aqueous media in applications, such as heat transfer, selective aeration, water electrolysis, drag reduction, etc. − These behaviors always depend on bubble wettability on the solid/liquid interfaces. ,, Thus, the development of functional interfacial materials with gas-bubble superwettability (i.e., superaerophilicity and superaerophobicity) supplies a possible solution for regulating the bubble’s behavior .…”

Section: Introductionmentioning

confidence: 99%

Efficient Gas Transportation Using Bioinspired Superhydrophobic Yarn as the Gas-Siphon Underwater

Zhang

Dong

et al. 2020

ACS Appl. Mater. Interfaces

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Inspired by the gas-trapped mechanism underwater of Argyroneta aquatica, we prepared a superhydrophobic yarn with a fiber network structure via a facile and environmentally friendly method. Attributed to the low surface energy, the superhydrophobic fiber network structure on the yarn is able to trap and transport bubbles directionally underwater. The functional yarn has good superhydrophobic and superaerophilic properties underwater to realize the directional transport of bubbles underwater without being pumped. We designed demonstration experiments on the antibuoyancy directional bubble transportation, which indicated the feasibility in the applications of gas-related fields. Significantly, on further testing, where the superhydrophobic yarn is put into a U-shaped pipe, we obtain a gas-siphon underwater with a high flux. The superhydrophobic fiber structure yarn can trap the gas underwater to enable the self-starting behavior while no manual intervention is used. The gas-siphon can convey gas over the edge of a vessel and deliver it at a higher level without energy input, which is driven by the differential pressure. The relationship between the differential pressure and the volume flux of transport bubbles is investigated. The experimental results show that the prepared superhydrophobic yarn has the advantages of good stability, easy preparation, and low cost in bubble continuous transportation underwater, which provides a novel strategy for the development and application of new technologies such as directional transportation, separation, exhaustion, and collection of gases in water.

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Section: Introductionmentioning

confidence: 99%

Efficient Gas Transportation Using Bioinspired Superhydrophobic Yarn as the Gas-Siphon Underwater

Zhang

Dong

et al. 2020

ACS Appl. Mater. Interfaces

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“…The directional and continuous transportation of microfluid without energy input has aroused extensive interest, [132][133][134][135][136][137][138][139] which advances excellent performances in microfluid movement, microfluid collection, and water splitting. So far, most studies have demonstrated that geometric gradient surfaces can achieve directional self-transport in different environments, such as underwater bubbles, underoil water droplets, and water droplets in air.…”

Section: Directional Self-transportmentioning

confidence: 99%

Laser Fabrication of Bioinspired Gradient Surfaces for Wettability Applications

Yin

Xiao

et al. 2021

Adv Materials Inter

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materials with gradients inspired by biological surfaces has therefore attracted much interest. Strategies for preparing gradient surfaces include vapor-phase diffusion, gradual immersion, electrochemical oxidation, and photolithography that have broadly adopted. [20-26] However, their material constraints, tedious and time-consuming processes, and their single-pattern limit their widespread use. Developing a substrate-independent, facile and efficient, pattern-diverse method for preparing gradient surfaces would aid fundamental science and practical application. Among various techniques, laser processing has recently emerged as a powerful tool in integratedoptics and biomimetic micro-nanodevices. This technology can be used to precisely control the preparation of micro/nanoscale structures on various substrates such as metals, glass, ceramics, and polymers. [27-33] Besides, the high energy density of lasers allows the machining process to be completed quickly and efficiently. Combining laser machining with computer-aided control allows laser ablation parameters to be precisely controlled, including the processing position, scanning speed, scanning interval, and scanning track. Laser processing can therefore be used to produce flexible and diverse patterns in complex workpieces. And laser micro/nano fabrication has been applied to regulate surface wettability. [34-43] Therefore, laser processing has great potential for developing samples with different wettability and geometries on various materials. This review discusses laser fabrication of bioinspired gradient surfaces for wettability applications, whose overview is shown in Figure 1. The related backgrounds including gradient surfaces in natural creatures, the theoretical basis of wettability, and the distinct characteristics of laser processing are introduced. Gradient surfaces can be classified into wettability gradients and geometric gradients, and they are discussed in terms of various laser fabrication approaches and wettability applications. It is worth mentioning the definition of wettability gradient and geometric gradient in this review. Wettability gradient is defined as a surface with no obvious geometric change in the shape, and there is a difference of contact angles on the macro level resulting from the roughness gradient on the micro level. Geometric gradient is defined as a surface possessing significant geometric changes in the shape, but not much difference in the roughness of the entire surface at the microscopic level. Specially, a wettability gradient surface generates a water driving force as a result of its varying surface roughness. Wettability gradient surfaces can be applied in water droplet control, Inspired by nature, gradient surfaces have attracted broad research interest because of their potential in microfluidics, fog/water collection, and water electrolysis. Among the various techniques for preparing gradient surfaces, laser processing is substrate-independent, facile and efficient, patterndiverse, which can be used to prepare...

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“…Moreover, Jiang and co-workers carried out a series of studies about the behaviors of gas bubbles on solid interfaces, including generation, growth, coalescence, release, transport, and collection [33][34][35][36][37]. However, to date, there is still a challenge both simple preparation of single-layer Janus material and directional manipulation of the bubble, improve the practical application in the field of pipe transportation of fluid, corrosion of ocean vessels, and control of foaming process.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Single-Layer Janus Membrane for Underwater Bubble Unidirectional Transport

Liu

Peng²,

Huang³

et al. 2022

Front. Phys.

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Janus membranes with superwetting play an important role in many fields, such as oil/water separation, unidirectional fluid transportation, microfluidic devices, intelligent ion valve, mass/heat transfer applications, etc. Although there has been some progress in the preparation of the Janus membranes with unidirectional penetration, it still remains a great difficulty for facile fabrication of two dimensional Janus membranes with a large pore structure and stable bubble unidirectional transport in the water. Herein, a signal-layer Janus membrane with superwetting is fabricated via the method of liquid-regulated hydrophobic modification strategy. The resultant Janus mesh achieves underwater unidirectional penetration. Namely, Underwater bubbles can pass unidirectionally from superhydrophobic side to hydrophilic side, but are blocked from passing through in the opposite direction. Thus, this Janus membrane with the unidirectional underwater bubbles penetration “diode” performance. We believe this work can promote the development of multi-dimensional Janus materials for fluid directional transport.

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Spontaneous and Directional Bubble Transport on Porous Copper Wires with Complex Shapes in Aqueous Media

Cited by 23 publications

References 37 publications

Efficient Gas Transportation Using Bioinspired Superhydrophobic Yarn as the Gas-Siphon Underwater

Efficient Gas Transportation Using Bioinspired Superhydrophobic Yarn as the Gas-Siphon Underwater

Laser Fabrication of Bioinspired Gradient Surfaces for Wettability Applications

Facile Fabrication of Single-Layer Janus Membrane for Underwater Bubble Unidirectional Transport

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