Water Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust

Abstract The dynamic motion of a water droplet on an inclined hydrophobic surface is analyzed with and without environmental dust particles on the surface. Solution crystallization of a polycarbonate surface is carried out to generate a hydrophobic surface with hierarchical texture composed of micro...

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Autores principales:	Bekir Sami Yilbas, Ghassan Hassan, Abdullah Al-Sharafi, Haider Ali, Nasser Al-Aqeeli, Abdelsalam Al-Sarkhi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ffcc2d60fb01458fb451b6594ee14aba
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spelling	oai:doaj.org-article:ffcc2d60fb01458fb451b6594ee14aba2021-12-02T15:08:18ZWater Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust10.1038/s41598-018-21370-52045-2322https://doaj.org/article/ffcc2d60fb01458fb451b6594ee14aba2018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-21370-5https://doaj.org/toc/2045-2322Abstract The dynamic motion of a water droplet on an inclined hydrophobic surface is analyzed with and without environmental dust particles on the surface. Solution crystallization of a polycarbonate surface is carried out to generate a hydrophobic surface with hierarchical texture composed of micro/nanosize spheroids and fibrils. Functionalized nanosize silica particles are deposited on the textured surface to reduce contact angle hysteresis. Environmental dust particles are collected and characterized using analytical tools prior to the experiments. The droplet motion on the hydrophobic surface is assessed using high-speed camera data, and then, the motion characteristics are compared with the corresponding analytical results. The influence of dust particles on the water droplet motion and the amount of dust particles picked up from the hydrophobic surface by the moving droplet is evaluated experimentally. A 40 μL droplet was observed to roll on the hydrophobic surface with and without dust particles, and the droplet slip velocity was lower than the rotational velocity. The rolling droplet removes almost all dust particles from the surface, and the mechanism for the removal of dust particles from the surface was determined to be water cloaking of the dust particles.Bekir Sami YilbasGhassan HassanAbdullah Al-SharafiHaider AliNasser Al-AqeeliAbdelsalam Al-SarkhiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-19 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bekir Sami Yilbas Ghassan Hassan Abdullah Al-Sharafi Haider Ali Nasser Al-Aqeeli Abdelsalam Al-Sarkhi Water Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust
description	Abstract The dynamic motion of a water droplet on an inclined hydrophobic surface is analyzed with and without environmental dust particles on the surface. Solution crystallization of a polycarbonate surface is carried out to generate a hydrophobic surface with hierarchical texture composed of micro/nanosize spheroids and fibrils. Functionalized nanosize silica particles are deposited on the textured surface to reduce contact angle hysteresis. Environmental dust particles are collected and characterized using analytical tools prior to the experiments. The droplet motion on the hydrophobic surface is assessed using high-speed camera data, and then, the motion characteristics are compared with the corresponding analytical results. The influence of dust particles on the water droplet motion and the amount of dust particles picked up from the hydrophobic surface by the moving droplet is evaluated experimentally. A 40 μL droplet was observed to roll on the hydrophobic surface with and without dust particles, and the droplet slip velocity was lower than the rotational velocity. The rolling droplet removes almost all dust particles from the surface, and the mechanism for the removal of dust particles from the surface was determined to be water cloaking of the dust particles.
format	article
author	Bekir Sami Yilbas Ghassan Hassan Abdullah Al-Sharafi Haider Ali Nasser Al-Aqeeli Abdelsalam Al-Sarkhi
author_facet	Bekir Sami Yilbas Ghassan Hassan Abdullah Al-Sharafi Haider Ali Nasser Al-Aqeeli Abdelsalam Al-Sarkhi
author_sort	Bekir Sami Yilbas
title	Water Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust
title_short	Water Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust
title_full	Water Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust
title_fullStr	Water Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust
title_full_unstemmed	Water Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust
title_sort	water droplet dynamics on a hydrophobic surface in relation to the self-cleaning of environmental dust
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/ffcc2d60fb01458fb451b6594ee14aba
work_keys_str_mv	AT bekirsamiyilbas waterdropletdynamicsonahydrophobicsurfaceinrelationtotheselfcleaningofenvironmentaldust AT ghassanhassan waterdropletdynamicsonahydrophobicsurfaceinrelationtotheselfcleaningofenvironmentaldust AT abdullahalsharafi waterdropletdynamicsonahydrophobicsurfaceinrelationtotheselfcleaningofenvironmentaldust AT haiderali waterdropletdynamicsonahydrophobicsurfaceinrelationtotheselfcleaningofenvironmentaldust AT nasseralaqeeli waterdropletdynamicsonahydrophobicsurfaceinrelationtotheselfcleaningofenvironmentaldust AT abdelsalamalsarkhi waterdropletdynamicsonahydrophobicsurfaceinrelationtotheselfcleaningofenvironmentaldust
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Water Droplet Dynamics on a Hydrophobic Surface in Relation to the Self-Cleaning of Environmental Dust

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