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Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect
Atmospheric water is emerging as an important potable water source. The present work experimentally and theoretically investigates water condensation and collection on flat surfaces with contrasting contact angles and contact angle hysteresis (CAH) to elucidate their roles on water mass collection e...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6607251/ https://www.ncbi.nlm.nih.gov/pubmed/31565272 http://dx.doi.org/10.1002/gch2.201700019 |
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author | Jin, Yong Zhang, Lianbin Wang, Peng |
author_facet | Jin, Yong Zhang, Lianbin Wang, Peng |
author_sort | Jin, Yong |
collection | PubMed |
description | Atmospheric water is emerging as an important potable water source. The present work experimentally and theoretically investigates water condensation and collection on flat surfaces with contrasting contact angles and contact angle hysteresis (CAH) to elucidate their roles on water mass collection efficiency. The experimental results indicate that a hydrophilic surface promotes nucleation and individual droplets growth, and a surface with a low CAH tends to let a smaller droplet to slide down, but the overall water mass collection efficiency is independent of both surface contact angle and CAH. The experimental results agree well with our theoretical calculations. During water condensation, a balance has to be struck between single droplet growth and droplet density on a surface so as to maintain a constant water droplet surface coverage ratio, which renders the role of both surface wettability and hysteresis insignificant to the ultimate water mass collection. Moreover, water droplets on the edges of a surface grow much faster than those on the non‐edge areas and thus dominate the contribution to the water mass collection by the entire surface, directly pointing out the very important role of edge effect on water condensation and collection. |
format | Online Article Text |
id | pubmed-6607251 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-66072512019-09-27 Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect Jin, Yong Zhang, Lianbin Wang, Peng Glob Chall Full Papers Atmospheric water is emerging as an important potable water source. The present work experimentally and theoretically investigates water condensation and collection on flat surfaces with contrasting contact angles and contact angle hysteresis (CAH) to elucidate their roles on water mass collection efficiency. The experimental results indicate that a hydrophilic surface promotes nucleation and individual droplets growth, and a surface with a low CAH tends to let a smaller droplet to slide down, but the overall water mass collection efficiency is independent of both surface contact angle and CAH. The experimental results agree well with our theoretical calculations. During water condensation, a balance has to be struck between single droplet growth and droplet density on a surface so as to maintain a constant water droplet surface coverage ratio, which renders the role of both surface wettability and hysteresis insignificant to the ultimate water mass collection. Moreover, water droplets on the edges of a surface grow much faster than those on the non‐edge areas and thus dominate the contribution to the water mass collection by the entire surface, directly pointing out the very important role of edge effect on water condensation and collection. John Wiley and Sons Inc. 2017-06-23 /pmc/articles/PMC6607251/ /pubmed/31565272 http://dx.doi.org/10.1002/gch2.201700019 Text en © 2017 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Full Papers Jin, Yong Zhang, Lianbin Wang, Peng Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect |
title | Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect |
title_full | Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect |
title_fullStr | Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect |
title_full_unstemmed | Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect |
title_short | Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect |
title_sort | atmospheric water harvesting: role of surface wettability and edge effect |
topic | Full Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6607251/ https://www.ncbi.nlm.nih.gov/pubmed/31565272 http://dx.doi.org/10.1002/gch2.201700019 |
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