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Thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion

The build-up of ice on aircraft, bridges, oil rigs, wind turbines, electrical lines, and other surfaces exposed to cold environments diminishes their safe and effective operation. To engineer robust surfaces that reduce ice adhesion, it is necessary to understand the physics of what makes a surface...

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Detalles Bibliográficos
Autores principales: Zhao, Tom Y., Jones, Paul R., Patankar, Neelesh A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6342967/
https://www.ncbi.nlm.nih.gov/pubmed/30670738
http://dx.doi.org/10.1038/s41598-018-36268-5
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author Zhao, Tom Y.
Jones, Paul R.
Patankar, Neelesh A.
author_facet Zhao, Tom Y.
Jones, Paul R.
Patankar, Neelesh A.
author_sort Zhao, Tom Y.
collection PubMed
description The build-up of ice on aircraft, bridges, oil rigs, wind turbines, electrical lines, and other surfaces exposed to cold environments diminishes their safe and effective operation. To engineer robust surfaces that reduce ice adhesion, it is necessary to understand the physics of what makes a surface icephobic (“ice-hating”) as well as the relationship between icephobicity and ice adhesion. Here we elucidate the molecular origin of icephobicity based on ice-surface interactions and characterize the correlation between material icephobicity and liquid wettability. This fundamental understanding of icephobic characteristics enables us to propose a robust design for topologically textured, icephobic surfaces. The design identifies the critical confinement length scale to sustain liquid water (as opposed to ice) in between roughness features and can reduce the strength of ice adhesion by over a factor of twenty-seven compared to traditional hydrophobic surfaces. The reduction in ice adhesion is due to the metastability of liquid water; as ambient ice cleaves from the textured surface, liquid water leaves confinement and freezes – a process which takes the system from a local energy minimum to a global energy minimum. This phase transition generates a detachment force that actively propels ambient ice from the surface.
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spelling pubmed-63429672019-01-26 Thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion Zhao, Tom Y. Jones, Paul R. Patankar, Neelesh A. Sci Rep Article The build-up of ice on aircraft, bridges, oil rigs, wind turbines, electrical lines, and other surfaces exposed to cold environments diminishes their safe and effective operation. To engineer robust surfaces that reduce ice adhesion, it is necessary to understand the physics of what makes a surface icephobic (“ice-hating”) as well as the relationship between icephobicity and ice adhesion. Here we elucidate the molecular origin of icephobicity based on ice-surface interactions and characterize the correlation between material icephobicity and liquid wettability. This fundamental understanding of icephobic characteristics enables us to propose a robust design for topologically textured, icephobic surfaces. The design identifies the critical confinement length scale to sustain liquid water (as opposed to ice) in between roughness features and can reduce the strength of ice adhesion by over a factor of twenty-seven compared to traditional hydrophobic surfaces. The reduction in ice adhesion is due to the metastability of liquid water; as ambient ice cleaves from the textured surface, liquid water leaves confinement and freezes – a process which takes the system from a local energy minimum to a global energy minimum. This phase transition generates a detachment force that actively propels ambient ice from the surface. Nature Publishing Group UK 2019-01-22 /pmc/articles/PMC6342967/ /pubmed/30670738 http://dx.doi.org/10.1038/s41598-018-36268-5 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhao, Tom Y.
Jones, Paul R.
Patankar, Neelesh A.
Thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion
title Thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion
title_full Thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion
title_fullStr Thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion
title_full_unstemmed Thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion
title_short Thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion
title_sort thermodynamics of sustaining liquid water within rough icephobic surfaces to achieve ultra-low ice adhesion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6342967/
https://www.ncbi.nlm.nih.gov/pubmed/30670738
http://dx.doi.org/10.1038/s41598-018-36268-5
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