Controlling the radiative properties of cool black-color coatings pigmented with CuO submicron particles

Gonome, Hiroki; Baneshi, Mehdi; Okajima, Junnosuke; Komiya, Atsuki; Maruyama, Shigenao

doi:10.1016/j.jqsrt.2013.02.027

Cited by 54 publications

(34 citation statements)

References 24 publications

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“…To quantitatively evaluate the thermal barrier performance, the total solar reflectance is calculated according to Equation (8). Figure 4 shows the effect of the particle diameter on the total solar reflectance.…”

Section: Total Solar Reflectancementioning

confidence: 99%

“…Although NIR radiation comprises 52% of the energy of sunlight, no cosmetics exist that control NIR radiation. Meanwhile, Gonome et al developed a spectral selective coating pigmented by nano/microparticles to reflect NIR light for industrial use [8,9]. Álvarez-Docio et al also developed CoAl 2 O 4 pigments for NIR light reflection and discussed the effects of the morphology and dispersion of the particles [10].…”

Section: Introductionmentioning

confidence: 99%

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Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

Gonome

Yamada

2018

Coatings

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Abstract:In this paper, a method of optimizing a thermal barrier cosmetic and spectral selective cosmetic by controlling the particle size and material is proposed as a countermeasure to heatstroke. The radiative properties of single cosmetic particles of a wide range of particle sizes and wavelengths in non-absorbing air were calculated in this study based on the Mie theory. Al 2 O 3 , TiO 2 , Au, and Ag were used as the material of the cosmetic particle. The radiative property of a particle cloud in dependent scattering was calculated. The radiative transfer in the cosmetic layer was analyzed, and the spectral reflectance of the cosmetic layer on the human skin was calculated. A new parameter was defined to quantitatively evaluate the performance of the thermal barrier cosmetic and spectral selective cosmetic. For the thermal barrier cosmetic, the Al 2 O 3 particle was determined to be suitable, and its size was optimized. For the spectral selective cosmetic, the Au particle was likewise determined to be suitable, and its size was optimized. Our cosmetics satisfied both aesthetic and thermal concerns.

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Section: Total Solar Reflectancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

Gonome

Yamada

2018

Coatings

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“…This might enhance the efficiency of the inorganic layer as a light trapping material. [73][74][75] In addition, the electrical resistance of an inorganic layer also affects its reectivity. Chang et al 76 reported that light reection, R, was inversely related to the electrical resistance, r, as described in eqn (9).…”

Section: 71mentioning

confidence: 99%

Decoration of an inorganic layer with nickel (hydr)oxide via green plasma electrolysis

Fatimah

Khoerunnisa

2018

RSC Adv.

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In this study, we describe the green plasma electrolysis of a magnesium alloy in alkaline electrolyte to produce a hybrid inorganic layer with nickel (hydr)oxide incorporated in a matrix of magnesium oxide, and investigate the electrochemical and optical properties of this material. The addition of Ni(NO 3 ) 2 $6H 2 O to the electrolyte reduced the size of the micro-defects found in the inorganic layer after plasma electrolysis by inducing soft plasma discharges. As a result, through cyclic voltammetry and polarization tests, the corrosion stability of the sample containing nickel (hydr)oxide was significantly enhanced. Measurement of the optical properties reveals that the material possesses excellent energy efficiency as indicated by a high solar absorptivity of $0.92 and a low infrared emissivity of $0.13 which are presumably due to the inherent dark-brown colour of nickel (hydr)oxide. We expect that these results will have implications in the development of functional materials with excellent optical and corrosion properties by considering green processing utilizing alkaline electrolyte.

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“…Optical properties of materials doped with nanoparticles have been investigated before [12,13]. Experimental and analytical study of thermal coatings doped with nanoparticles such as Gonome et al [14,15] can also be found in literature. However, emissive properties of nanoparticles embedded thin films have not been studied in detail to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Thermal Radiative Wavelength Selectivity of Nanostructured Layered Media

Zheng¹

2017

Nanoscaled Films and Layers

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Thermal radiative transport yields unique thermal characteristics of microscopic thin films-wavelength selectivity. This chapter focuses on a methodology about adjusting the wavelength selectivity of thin films embedded with nanoparticles in the far-field and near-field regimes. For nanostructured layered media doped with nanoparticles, Maxwell-Garnett-Mie theory is applied to determine the effective dielectric function for the calculation of radiative thermal transport. The thermal radiative wavelength selectivity can be affected by volume fraction and/or the size of the embedded nanoparticles in thin films. To characterize wavelength selectivity and optical property of nanostructured materials, both real and imaginary parts of effective refractive index need to be analyzed. It has been shown that the nanoparticles made of polar or metallic materials have different influence on thermal radiative wavelength selectivity of microscopic thin films.

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Controlling the radiative properties of cool black-color coatings pigmented with CuO submicron particles

Cited by 54 publications

References 24 publications

Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

Decoration of an inorganic layer with nickel (hydr)oxide via green plasma electrolysis

Thermal Radiative Wavelength Selectivity of Nanostructured Layered Media

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