Designing a slippery/superaerophobic hierarchical open channel for reliable and versatile underwater gas delivery

Wang, Xinsheng; Bai, Haoyu; Li, Zhe; Tian, Yaru; Zhao, Tianhong; Cao, Moyuan

doi:10.1039/d3mh00898c

Cited by 12 publications

(10 citation statements)

References 54 publications

(65 reference statements)

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“…Lubricant-impregnated surfaces allow the removal of complex droplets (in fact, various liquids) because of a lubricant layer in between the complex droplet and the surface structures (a functionality denoted as slipperiness), − where the solid–liquid direct contact is minimized and the droplet motion is controlled mainly by lubricant’s shear stress (Figure c). However, lubricant-impregnated surfaces require a driving force to remove droplets (typically gravitational force with a substrate inclination or Laplace pressure force with a substrate curvature gradient) and cannot allow droplet rebound for self-cleaning purposes, like the case occurring on superhydrophobic surfaces because of the high droplet–lubricant normal adhesion.…”

Section: Introductionmentioning

confidence: 99%

A Superhydrophobicity–Slipperiness Switchable Surface with Magneto- and Thermo-responsive Wires for Repelling Complex Droplets

Wei,

Gendelman,

Jiang

2024

Langmuir

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The inefficacy of repelling water droplets laden with macromolecules (complex droplets or diluted polymer solution) is a long-standing shortcoming of superhydrophobic surfaces, which severely limits their reliability in practical applications. Here, we design a surface termed the superhydrophobicity− slipperiness switchable surface (3S surface), which demonstrates superhydrophobicity at room temperature and slipperiness when heated. The 3S surface is composed of magneto-responsive wires coated with superhydrophobic nanoparticles and impregnated with thermoresponsive paraffin, exhibiting lotus leafinspired passive water repellency and respiratory cilia-inspired active water repellency at room temperature. When heated, the impregnated paraffin melts and forms a lubricant layer atop the surface structures, exhibiting the pitcher-plant-inspired removal of complex droplets that remain pinned on conventional superhydrophobic surfaces. The counterintuitive integration of superhydrophobicity (a liquid−solid−gas composite system) and slipperiness (a liquid−lubricant−gas system) into a surface and the on-demand switch between them are not only important to the applicability of self-cleaning surfaces to real-world environments, where complex liquids are inevitable, but also provide insights into various interface-related applications.

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Section: Introductionmentioning

confidence: 99%

A Superhydrophobicity–Slipperiness Switchable Surface with Magneto- and Thermo-responsive Wires for Repelling Complex Droplets

Wei,

Gendelman,

Jiang

2024

Langmuir

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“…Anisotropic materials refer to materials with different properties in the two directions perpendicular to each other. , The methods to prepare anisotropic superhydrophobic surface include interference lithography, vacuum ultraviolet lithography, femtosecond laser, 3D-print, and so on. Huang et al utilized electrochemical etching to prepare an anisotropic superhydrophobic surface, effectively addressing the issue of directional liquid transport at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Oriented Superhydrophobic Surface to Reduce Agglomeration in Preparing Melt Marbles

He,

Huang,

Liu

et al. 2024

Langmuir

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Numerous innovative granulation techniques utilizing the concept of liquid marbles have been proposed before. However, these processes frequently encounter issues such as collisions, aggregation, and fragmentation of liquid/melt marble during the granulation process. In this study, the oriented superhydrophobic surface (OSS) was successfully prepared by utilizing copper wire to solve the above problem, facilitating efficient batch production and guided transportation of uniform marbles. The parameters and mechanisms of this process were thoroughly studied. The optimized structure is that the copper wire spacing (d) and height (h) are set as 1.0 and 0.1 mm, respectively. This resulted in a surface contact angle (CA) of 156°and anisotropic sliding (ΔSA) of 16.3 ± 1.34°. Using the prepared substrate, high-quality urea products were successfully obtained through the controlled transport of urea melt marbles. The mechanism of guided and directional drag reduction, based on the solid/solid contact on the surface, is proposed. These findings in this study have significant implications for improving granulation processes.

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“…Inspired by Nepenthes, researchers have achieved slippery surfaces by injecting a lubricant into rough substrates. , Compared to superhydrophobic surfaces, lubricant-infused slippery surfaces possess an immiscible and incompressible oil layer that is not miscible with water, rendering them advantageous in environments with high humidity and high pressure. , The hydrophobic smooth surfaces also possess favorable gas-trapping properties and will establish a robust base for regulating gas behavior in water-based settings . Bubble transport on solid surfaces is influenced by both the driving force and the resistance on the solid surface.…”

Section: Introductionmentioning

confidence: 99%

Underwater Bubble Manipulation on Surfaces with Patterned Regions with Infused Lubricants

He,

Li,

et al. 2024

ACS Appl. Mater. Interfaces

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The flexible manipulation of underwater gas bubbles on solid substrates has attracted considerable research interest from scientists in the fields of water electrolysis, bubble microreactions, drug delivery, and heat transfer. Inspired by the oxygen-binding mechanisms of aquatic organisms, scientists have designed a series of interfacial materials for use in collecting gases, detecting and grading bubbles, and conducting microbubble reactions. Aerophilic surfaces are commonly used in underwater bubble manipulation platforms due to their excellent gas-trapping properties. However, during bubble transport, some of the bubbles are retained in the rough structure of the aerophilic surface and cause gas loss, which in the long run reduces the gas transport function. In addition, the aerophilic surface is prone to failure in high-humidity and high-pressure underwater environments. The lubricant-infused surface features an oil layer that remains stable on a rough substrate and is immiscible with water. Additionally, the bubbles are transported over the oil layer without causing losses other than those dissolved in water. These attributes make it more favorable than the aerophilic surface. Inspired by the unique properties of Nepenthes and cactus spines, we developed a patterned slippery surface [patterned lubricant-infused surface (PLIS)] through laser etching and ammonia etching that facilitates the coexistence of superaerophobic and aerophilic surfaces. The PLIS executes bubble capture utilizing a difference in wettability measuring 78°, transports bubbles through Laplace force and buoyancy, and regulates bubble release by restricting the contact area on the PLIS. The PLIS can be prepared rapidly and affordably in just about an hour, and its potential for large-scale production is high. Following tests for shear, acid and alkali resistance, and corrosion resistance, the PLIS exhibited impressive weathering resistance and appears to have potential for application in some extreme environments.

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Designing a slippery/superaerophobic hierarchical open channel for reliable and versatile underwater gas delivery

Abstract: Achieving long-term and stable gas manipulation in an aqueous environment is necessary to improve multiphase systems relating to gas/liquid interaction. Inspired by Pitcher plant and hummingbird mouthpart, we reported a...

Cited by 12 publications

References 54 publications

A Superhydrophobicity–Slipperiness Switchable Surface with Magneto- and Thermo-responsive Wires for Repelling Complex Droplets

A Superhydrophobicity–Slipperiness Switchable Surface with Magneto- and Thermo-responsive Wires for Repelling Complex Droplets

Preparation of Oriented Superhydrophobic Surface to Reduce Agglomeration in Preparing Melt Marbles

Underwater Bubble Manipulation on Surfaces with Patterned Regions with Infused Lubricants

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