Reversible exchange of wetting state of a hydrophobic surface <i>via</i> phase change material coating

Yilbaş, Bekir Sami; Ali, Haider; Al‐Sharafi, Abdullah; Al-Aqeeli, N.

doi:10.1039/c7ra12504f

Cited by 14 publications

(6 citation statements)

References 49 publications

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“…The nano-size silica particles were formed through the synthesizing process, which involved with tetraethyl orthosilicate (TEOS), 3-aminopropyltrimethoxysilane (AMPTS) and isobuthytrimethoxysilane (OTES), ethanol, and ammonium hydroxide. The synthesizing process was presented earlier and the processing particulars could be obtained from the work reported 20,21 . The solution consisting of the synthesized silica particles was mixed with the modifier silane molecules 3:4 molar ratio to functionalize the silica particles.…”

Section: Methodsmentioning

confidence: 99%

Environmental Dust Particles Repelling from A Hydrophobic Surface under Electrostatic Influence

Yilbaş

Al‐Qahtani

Al‐Sharafi

et al. 2019

Sci Rep

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Environmental dust particles repelling from a hydrophobic surface under the electrostatic influence are considered and the dynamics of the dust particles are analyzed incorporating the high speed camera. The velocity of the repelled dust particles are formulated using the force balance incorporating the forces associated with the electrostatic repulsion, particle adhesion, particle drag, and the inflight particles interaction under the charge influence. The functionalized silica particles are deposited on the glass surface towards achieving a hydrophobic wetting state on the surface. An electronic circuitry is designed and built while generating the electrostatic effect, in the pulse form, on the dust particles located on the surface of the hydrophobic plate. Findings revealed that functionalized silica particles deposited surface results in hydrophobic wetting state with contact angle in the order of 158° ± 2° and contact angle hysteresis of 2° ± 1°. The electrostatic impulsive force generated on the plate surface enables to repel most of the sizes of the dust particles; however, some of the small dust particles remain as the residues on the surface after the electrostatic influence. The dust particle velocity predicted from the analytical formulation agrees with that obtained from the high speed camera data. The pinning force of the small size particles (0.6 µm≤), due to adhesion on the surface, is found to be larger than the average size particles (∼1.2 µm), which in turn, suppresses these particles repelling from the surface under the electrostatic influence. The residues of the dust particles on the as received glass surface after dust repelling are more than those residues on the hydrophobic surface. This behavior is associated with the dust particles adhesion on the surface. Consequently, hydrophobic wetting state on the plate surface improves the dust particle repelling from the surface.

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Section: Methodsmentioning

confidence: 99%

Environmental Dust Particles Repelling from A Hydrophobic Surface under Electrostatic Influence

Yilbaş

Al‐Qahtani

Al‐Sharafi

et al. 2019

Sci Rep

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“…The synthesis process was described in the early study, and the details of the process were referred to. 24 The solution containing the synthesized silica particles was mixed with the modifier silane molecules having the molar ratio of 3 : 4 in order to functionalize the silica particles. The final solution was stirred for 15 hours at room temperature, centrifuged, and washed with ethanol to remove the reactants in the mixture.…”

Section: Methodsmentioning

confidence: 99%

Environmental dust removal from inclined hydrophobic glass surface: avalanche influence on dynamics of dust particles

et al. 2018

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“…Equation () indicates that the force due to viscosity increases as the droplet moves along the wedge due to larger droplet‐substrate contact area A , further slowing down the movement. [ 47,53 ] Finally, the force due to gravity with an inclination angle θ incline is F g = ρVg sin θ incline . Here, θ incline is defined as the angle between the surface and horizontal direction.…”

Section: Theoretical Modelmentioning

confidence: 99%

Enhancing Spontaneous Droplet Motion on Structured Surfaces with Tailored Wedge Design

Wang

Owais

Neto

et al. 2020

Adv Materials Inter

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Spontaneous liquid transport has a wide variety of applications, including fog harvesting, microfluidics, and water‐oil separation. Understanding of the droplet movement dynamics on structured surfaces is essential for enhancing the transport performance. In this work, a theoretical model describing the movement process of droplets on surfaces with prescribed wedge shapes is developed. Agreement is observed between the predictions from the model and experimental results. Through theoretical analysis and quantitative comparison between the transport performance of different wedge shapes, the factors affecting the movement process are identified and guidelines for wedge shape optimization for spontaneous droplet transport are provided.

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Reversible exchange of wetting state of a hydrophobic surface via phase change material coating

Abstract: Reversible exchange of the wetting state of a hydrophobic surface is examined.

Cited by 14 publications

References 49 publications

Environmental Dust Particles Repelling from A Hydrophobic Surface under Electrostatic Influence

Environmental Dust Particles Repelling from A Hydrophobic Surface under Electrostatic Influence

Environmental dust removal from inclined hydrophobic glass surface: avalanche influence on dynamics of dust particles

Enhancing Spontaneous Droplet Motion on Structured Surfaces with Tailored Wedge Design

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