涂层
发射率
材料科学
辐射冷却
辐射传输
化学工程
复合材料
光学
气象学
物理
工程类
作者
Jing Lu,Y. L. Fan,Xing Lou,Wei Xie,Ben Zhao,Han Zhou,Tongxiang Fan
出处
期刊:Biomimetics
[MDPI AG]
日期:2024-01-13
卷期号:9 (1): 50-50
标识
DOI:10.3390/biomimetics9010050
摘要
Radiative cooling is a promising strategy to address energy challenges arising from global warming. Nevertheless, integrating optimal cooling performance with commercial applications is a considerable challenge. Here, we demonstrate a scalable and straightforward approach for fabricating green radiative cooling coating consisting of methyl cellulose matrix-random diatomites with water as a solvent. Because of the efficient scattering of the porous morphology of diatomite and the inherent absorption properties of both diatomite and cellulose, the aqueous coating exhibits an excellent solar reflectance of 94% in the range of 0.25-2.5 μm and a thermal emissivity of 0.9 in the range of 8-14 µm. During exposure to direct sunlight at noon, the obtained coating achieved a maximum subambient temperature drop of 6.1 °C on sunny days and 2.5 °C on cloudy days. Furthermore, diatomite is a naturally sourced material that requires minimal pre-processing, and our coatings can be prepared free from harmful organic compounds. Combined with cost-effectiveness and environmental friendliness, it offers a viable path for the commercial application of radiative cooling.
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