Artificial chameleon skin that controls spectral radiation: Development of Chameleon Cool Coating (C3)

Abstract Chameleons have a diagnostic thermal protection that enables them to live under various conditions. Our developed special radiative control therefore is inspired by the chameleon thermal protection ability by imitating its two superposed layers as two pigment particles in one coating layer....

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Main Authors: Hiroki Gonome, Masashi Nakamura, Junnosuke Okajima, Shigenao Maruyama
Format: Article
Language:English
Published: Nature Publishing Group 2018-01-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-018-19498-5
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spelling doaj-a39d3c4a7e124d5e8b195f1507a0f28e2020-12-08T05:17:42ZengNature Publishing GroupScientific Reports2045-23222018-01-01811910.1038/s41598-018-19498-5Artificial chameleon skin that controls spectral radiation: Development of Chameleon Cool Coating (C3)Hiroki Gonome0Masashi Nakamura1Junnosuke Okajima2Shigenao Maruyama3Department of Mechanical Engineering, Shibaura Institute of TechnologySchool of Engineering, Tohoku UniversityInstitute of Fluid Science, Tohoku UniversityInstitute of Fluid Science, Tohoku UniversityAbstract Chameleons have a diagnostic thermal protection that enables them to live under various conditions. Our developed special radiative control therefore is inspired by the chameleon thermal protection ability by imitating its two superposed layers as two pigment particles in one coating layer. One particle imitates a chameleon superficial surface for color control (visible light), and another particle imitates a deep surface to reflect solar irradiation, especially in the near-infrared region. Optical modeling allows us to optimally design the particle size and volume fraction. Experimental evaluation shows that the desired spectral reflectance, i.e., low in the VIS region and high in NIR region, can be achieved. Comparison between the measured and calculated reflectances shows that control of the particle size and dispersion/aggregation of particle cloud is important in improving the thermal-protection performance of the coating. Using our developed coating, the interior temperature decreases and the cooling load is reduced while keeping the dark tone of the object.https://doi.org/10.1038/s41598-018-19498-5
collection DOAJ
language English
format Article
sources DOAJ
author Hiroki Gonome
Masashi Nakamura
Junnosuke Okajima
Shigenao Maruyama
spellingShingle Hiroki Gonome
Masashi Nakamura
Junnosuke Okajima
Shigenao Maruyama
Artificial chameleon skin that controls spectral radiation: Development of Chameleon Cool Coating (C3)
Scientific Reports
author_facet Hiroki Gonome
Masashi Nakamura
Junnosuke Okajima
Shigenao Maruyama
author_sort Hiroki Gonome
title Artificial chameleon skin that controls spectral radiation: Development of Chameleon Cool Coating (C3)
title_short Artificial chameleon skin that controls spectral radiation: Development of Chameleon Cool Coating (C3)
title_full Artificial chameleon skin that controls spectral radiation: Development of Chameleon Cool Coating (C3)
title_fullStr Artificial chameleon skin that controls spectral radiation: Development of Chameleon Cool Coating (C3)
title_full_unstemmed Artificial chameleon skin that controls spectral radiation: Development of Chameleon Cool Coating (C3)
title_sort artificial chameleon skin that controls spectral radiation: development of chameleon cool coating (c3)
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2018-01-01
description Abstract Chameleons have a diagnostic thermal protection that enables them to live under various conditions. Our developed special radiative control therefore is inspired by the chameleon thermal protection ability by imitating its two superposed layers as two pigment particles in one coating layer. One particle imitates a chameleon superficial surface for color control (visible light), and another particle imitates a deep surface to reflect solar irradiation, especially in the near-infrared region. Optical modeling allows us to optimally design the particle size and volume fraction. Experimental evaluation shows that the desired spectral reflectance, i.e., low in the VIS region and high in NIR region, can be achieved. Comparison between the measured and calculated reflectances shows that control of the particle size and dispersion/aggregation of particle cloud is important in improving the thermal-protection performance of the coating. Using our developed coating, the interior temperature decreases and the cooling load is reduced while keeping the dark tone of the object.
url https://doi.org/10.1038/s41598-018-19498-5
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AT junnosukeokajima artificialchameleonskinthatcontrolsspectralradiationdevelopmentofchameleoncoolcoatingc3
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