Cargando…

Tailoring surface wettability to reduce chances of infection of COVID-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment

Motivated by the fact that the drying time of respiratory droplets is related to the spread of COVID-19 [R. Bhardwaj and A. Agrawal, “Likelihood of survival of coronavirus in a respiratory droplet deposited on a solid surface,” Phys. Fluids 32, 061704, (2020)], we analyze the drying time of droplets...

Descripción completa

Detalles Bibliográficos
Autores principales: Bhardwaj, Rajneesh, Agrawal, Amit
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AIP Publishing LLC 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8728633/
https://www.ncbi.nlm.nih.gov/pubmed/35002197
http://dx.doi.org/10.1063/5.0020249
_version_ 1784626775638147072
author Bhardwaj, Rajneesh
Agrawal, Amit
author_facet Bhardwaj, Rajneesh
Agrawal, Amit
author_sort Bhardwaj, Rajneesh
collection PubMed
description Motivated by the fact that the drying time of respiratory droplets is related to the spread of COVID-19 [R. Bhardwaj and A. Agrawal, “Likelihood of survival of coronavirus in a respiratory droplet deposited on a solid surface,” Phys. Fluids 32, 061704, (2020)], we analyze the drying time of droplets ejected from a COVID-19 infected subject on surfaces of personal protection equipment (PPE), such as a face mask, of different wettabilities. We report the ratio of drying time of the droplet on an ideal superhydrophobic surface (contact angle, θ → 180°) to an ideal hydrophilic surface (θ → 0°) and the ratio of the maximum to minimum drying time of the droplet on the surfaces with different contact angles. The drying time is found to be maximum if θ = 148°, while the aforementioned ratios are 4.6 and 4.8, respectively. These ratios are independent of the droplet initial volume, ambient temperature, relative humidity, and thermophysical properties of the droplet and water vapor. We briefly examine the change in drying time in the presence of impurities on the surface. Besides being of fundamental interest, the analysis provides insights that are useful while designing the PPE to tackle the present pandemic.
format Online
Article
Text
id pubmed-8728633
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher AIP Publishing LLC
record_format MEDLINE/PubMed
spelling pubmed-87286332022-01-05 Tailoring surface wettability to reduce chances of infection of COVID-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment Bhardwaj, Rajneesh Agrawal, Amit Phys Fluids (1994) Letters Motivated by the fact that the drying time of respiratory droplets is related to the spread of COVID-19 [R. Bhardwaj and A. Agrawal, “Likelihood of survival of coronavirus in a respiratory droplet deposited on a solid surface,” Phys. Fluids 32, 061704, (2020)], we analyze the drying time of droplets ejected from a COVID-19 infected subject on surfaces of personal protection equipment (PPE), such as a face mask, of different wettabilities. We report the ratio of drying time of the droplet on an ideal superhydrophobic surface (contact angle, θ → 180°) to an ideal hydrophilic surface (θ → 0°) and the ratio of the maximum to minimum drying time of the droplet on the surfaces with different contact angles. The drying time is found to be maximum if θ = 148°, while the aforementioned ratios are 4.6 and 4.8, respectively. These ratios are independent of the droplet initial volume, ambient temperature, relative humidity, and thermophysical properties of the droplet and water vapor. We briefly examine the change in drying time in the presence of impurities on the surface. Besides being of fundamental interest, the analysis provides insights that are useful while designing the PPE to tackle the present pandemic. AIP Publishing LLC 2020-08-01 2020-08-11 /pmc/articles/PMC8728633/ /pubmed/35002197 http://dx.doi.org/10.1063/5.0020249 Text en © 2020 Author(s) Published under license by AIP Publishing. 1070-6631/2020/32(8)/081702/5/$30.00 https://creativecommons.org/licenses/by/4.0/All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Letters
Bhardwaj, Rajneesh
Agrawal, Amit
Tailoring surface wettability to reduce chances of infection of COVID-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment
title Tailoring surface wettability to reduce chances of infection of COVID-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment
title_full Tailoring surface wettability to reduce chances of infection of COVID-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment
title_fullStr Tailoring surface wettability to reduce chances of infection of COVID-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment
title_full_unstemmed Tailoring surface wettability to reduce chances of infection of COVID-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment
title_short Tailoring surface wettability to reduce chances of infection of COVID-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment
title_sort tailoring surface wettability to reduce chances of infection of covid-19 by a respiratory droplet and to improve the effectiveness of personal protection equipment
topic Letters
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8728633/
https://www.ncbi.nlm.nih.gov/pubmed/35002197
http://dx.doi.org/10.1063/5.0020249
work_keys_str_mv AT bhardwajrajneesh tailoringsurfacewettabilitytoreducechancesofinfectionofcovid19byarespiratorydropletandtoimprovetheeffectivenessofpersonalprotectionequipment
AT agrawalamit tailoringsurfacewettabilitytoreducechancesofinfectionofcovid19byarespiratorydropletandtoimprovetheeffectivenessofpersonalprotectionequipment