Tribological behavior and wettability of spray-coated superhydrophobic coatings on aluminum

Young, Therin J.; Jackson, Jocelyn; Roy, Sougata; Ceylan, Hali̇l; Sundararajan, Sriram

doi:10.1016/j.wear.2016.12.050

Cited by 25 publications

(8 citation statements)

References 21 publications

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“…This decrease was attributed to the much lower surface energy of the superhydrophobic surface as a result of the petal‐like topography and material‐based energy dissipation. [ 36 ] This finding was consistent with the study by Young et al [ 37 ]…”

Section: Resultssupporting

confidence: 93%

High‐speed wire electrical discharge machining to create superhydrophobic surfaces for magnesium alloys with high corrosion and wear resistance

Qiu

Wei

et al. 2020

Materials & Corrosion

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Section: Resultssupporting

confidence: 93%

High‐speed wire electrical discharge machining to create superhydrophobic surfaces for magnesium alloys with high corrosion and wear resistance

Qiu

Wei

et al. 2020

Materials & Corrosion

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“…In summary, a superhydrophobic (SH) coating made by recyclable polymers, polystyrene from packaging, and PTFE powder was successfully prepared on glass substrate using a spraycoating technique. The use of spray allows large, homogeneous flawless superhydrophobic surfaces to be obtained at room temperature without preliminary substrate preparation showing a water CA up to 170 • and sliding angle less than 5 • in agreement with the literature data [43,48,53,55,[69][70][71]. It can be regarded as an alternative technique with respect to spin coating [72].…”

Section: Discussionsupporting

confidence: 84%

Superhydrophobicity and Durability in Recyclable Polymers Coating

Cirisano

Ferrari

2021

Sustainability

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Highly hydrophobic and superhydrophobic materials obtained from recycled polymers represent an interesting challenge to recycle and reuse advanced performance materials after their first life. In this article, we present a simple and low-cost method to fabricate a superhydrophobic surface by employing polytetrafluoroethylene (PTFE) powder in polystyrene (PS) dispersion. With respect to the literature, the superhydrophobic surface (SHS) was prepared by utilizing a spray- coating technique at room temperature, a glass substrate without any further modification or thermal treatment, and which can be applied onto a large area and on to any type of material with some degree of fine control over the wettability properties. The prepared surface showed superhydrophobic behavior with a water contact angle (CA) of 170°; furthermore, the coating was characterized with different techniques, such as a 3D confocal profilometer, to measure the average roughness of the coating, and scanning electron microscopy (SEM) to characterize the surface morphology. In addition, the durability of SH coating was investigated by a long-water impact test (raining test), thermal treatment at high temperature, an abrasion test, and in acidic and alkaline environments. The present study may suggest an easy and scalable method to produce SHS PS/PTFE films that may find implementation in various fields.

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“…[ 31 ] The tribological properties of dry and submerged superhydrophobic surfaces against steel and tungsten probes have been studied before, and their coefficients of friction have been in the range of μ = 0.01–0.08. [ 32–34 ] Here, we show that superhydrophobic surfaces used in tandem with hydrophilic surfaces can create a lubricating system based on a water–air bilayer. We achieve superlubricity (μ < 0.01) at low velocities ( v < 0.1 m s −1 ) with friction coefficient values down to 0.002 with pure water and ambient air as lubricant and under light loads.…”

Section: Introductionmentioning

confidence: 93%

Superhydrophobic Lubrication: Gas–Liquid Bilayer Reduces the Friction Between Two Solids

Nurmi

Toptunov³

et al. 2022

Adv Materials Inter

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Lubrication is one of the most important ways to reduce the effect of friction, which is the single largest cause for energy losses in society. Typically, friction reduction is done by lubrication with petroleum‐based oils, while technology focus is shifting toward environmentally‐friendly green lubrication. Lowest friction coefficients with water‐based lubrication have previously been achieved with smooth surfaces such as silicon carbide and silicon nitride or polyzwitterionic polymer brushes with typical coefficients of friction in the order of 0.002. Here, a novel concept for green lubrication using a bilayer of water and ambient air acting as the lubricant between a hydrophilic and superhydrophobic surface is shown. This method achieves superlubricity with friction coefficients down to 0.002 as measured with oscillating tribometer and tilting stage. In addition, possible applications for superhydrophobic lubrication such as tunable lubrication and a 2D mouse treadmill, are shown.

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Tribological behavior and wettability of spray-coated superhydrophobic coatings on aluminum

Cited by 25 publications

References 21 publications

High‐speed wire electrical discharge machining to create superhydrophobic surfaces for magnesium alloys with high corrosion and wear resistance

High‐speed wire electrical discharge machining to create superhydrophobic surfaces for magnesium alloys with high corrosion and wear resistance

Superhydrophobicity and Durability in Recyclable Polymers Coating

Superhydrophobic Lubrication: Gas–Liquid Bilayer Reduces the Friction Between Two Solids

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