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Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling
Solar reflective and thermally emissive surfaces offer a sustainable way to cool objects under sunlight. However, white or silvery reflectance of these surfaces does not satisfy the need for color. Here, we present a paintable bilayer coating that simultaneously achieves color and radiative cooling....
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7182418/ https://www.ncbi.nlm.nih.gov/pubmed/32426464 http://dx.doi.org/10.1126/sciadv.aaz5413 |
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author | Chen, Yijun Mandal, Jyotirmoy Li, Wenxi Smith-Washington, Ajani Tsai, Cheng-Chia Huang, Wenlong Shrestha, Sajan Yu, Nanfang Han, Ray P. S. Cao, Anyuan Yang, Yuan |
author_facet | Chen, Yijun Mandal, Jyotirmoy Li, Wenxi Smith-Washington, Ajani Tsai, Cheng-Chia Huang, Wenlong Shrestha, Sajan Yu, Nanfang Han, Ray P. S. Cao, Anyuan Yang, Yuan |
author_sort | Chen, Yijun |
collection | PubMed |
description | Solar reflective and thermally emissive surfaces offer a sustainable way to cool objects under sunlight. However, white or silvery reflectance of these surfaces does not satisfy the need for color. Here, we present a paintable bilayer coating that simultaneously achieves color and radiative cooling. The bilayer comprises a thin, visible-absorptive layer atop a nonabsorptive, solar-scattering underlayer. The top layer absorbs appropriate visible wavelengths to show specific colors, while the underlayer maximizes the reflection of near-to-short wavelength infrared (NSWIR) light to reduce solar heating. Consequently, the bilayer attains higher NSWIR reflectance (by 0.1 to 0.51) compared with commercial paint monolayers of the same color and stays cooler by as much as 3.0° to 15.6°C under strong sunlight. High NSWIR reflectance of 0.89 is realized in the blue bilayer. The performances show that the bilayer paint design can achieve both color and efficient radiative cooling in a simple, inexpensive, and scalable manner. |
format | Online Article Text |
id | pubmed-7182418 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-71824182020-05-18 Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling Chen, Yijun Mandal, Jyotirmoy Li, Wenxi Smith-Washington, Ajani Tsai, Cheng-Chia Huang, Wenlong Shrestha, Sajan Yu, Nanfang Han, Ray P. S. Cao, Anyuan Yang, Yuan Sci Adv Research Articles Solar reflective and thermally emissive surfaces offer a sustainable way to cool objects under sunlight. However, white or silvery reflectance of these surfaces does not satisfy the need for color. Here, we present a paintable bilayer coating that simultaneously achieves color and radiative cooling. The bilayer comprises a thin, visible-absorptive layer atop a nonabsorptive, solar-scattering underlayer. The top layer absorbs appropriate visible wavelengths to show specific colors, while the underlayer maximizes the reflection of near-to-short wavelength infrared (NSWIR) light to reduce solar heating. Consequently, the bilayer attains higher NSWIR reflectance (by 0.1 to 0.51) compared with commercial paint monolayers of the same color and stays cooler by as much as 3.0° to 15.6°C under strong sunlight. High NSWIR reflectance of 0.89 is realized in the blue bilayer. The performances show that the bilayer paint design can achieve both color and efficient radiative cooling in a simple, inexpensive, and scalable manner. American Association for the Advancement of Science 2020-04-24 /pmc/articles/PMC7182418/ /pubmed/32426464 http://dx.doi.org/10.1126/sciadv.aaz5413 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Chen, Yijun Mandal, Jyotirmoy Li, Wenxi Smith-Washington, Ajani Tsai, Cheng-Chia Huang, Wenlong Shrestha, Sajan Yu, Nanfang Han, Ray P. S. Cao, Anyuan Yang, Yuan Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling |
title | Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling |
title_full | Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling |
title_fullStr | Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling |
title_full_unstemmed | Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling |
title_short | Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling |
title_sort | colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7182418/ https://www.ncbi.nlm.nih.gov/pubmed/32426464 http://dx.doi.org/10.1126/sciadv.aaz5413 |
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