A double-layer insulated coating was prepared.The first layer embedded with rutile titanium dioxide and second layer based on carbon nanotubes and nano silicon dioxide were responsible for reflective insulation and radiative cooling,respectively.The hemispherical emissivity,spectral reflectance curves,indoor temperature reduction effect were characterized.The results indicated that when the thickness of the radiative layer was 100μm and the mass fraction of CNT and nano SiO2 were 0.5% and 6%,the coating got the best cooling effect.The hemispherical emissivity of the radiative layer was 93%.The solar reflectance of double-layer coating was 87.11%,and the temperature reduction was 26.7℃.
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基金资助
中国石化科技发展项目(317011-2)
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