期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 43, 页码 24276-24282出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta07953k
关键词
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资金
- National Natural Science Foundation of China [51572161]
- Ministry of Science and Technology of China [2017YFB0307700]
- Research Grants Council of Hong Kong [C1006-20WF]
- Innovation and Technology Fund [9440248]
- Natural Science Foundation of Shaanxi Province [2020JM-506]
- major project of Scientific Research in Shaanxi Province [2020ZDLGY13-11]
By mimicking the structures and functions of the Cyphochilus beetle, Saharan silver ant, and lotus leaf, a hierarchically structured self-cleaning coating was developed to achieve sustainable radiative cooling even under harsh conditions. This coating integrates strong sunlight reflection, high thermal-infrared emission, and robust anti-contamination, and can be applied on arbitrary surfaces, achieving a sub-ambient temperature drop of 13.8 degrees C under strong sunlight even with long-time outdoor exposure.
Energy-free cooling coatings present great potential to reduce global energy consumption, in which passive daytime radiative cooling (PDRC) without the use of additional electricity is promising. In spite of exciting progress, most of the PDRC materials are still limited by poor opto-thermal durability imposed by the unwanted surface contamination in real-world environments and complicated manufacturing processes, which hinder their practical applications. To overcome these challenges, here we develop a multi-bioinspired, hierarchically structured self-cleaning coating that imparts sustainable radiative cooling, even under harsh conditions. Our design mainly mimics the structures and functions of the Cyphochilus beetle, Saharan silver ant and lotus leaf, which synergistically results in a strong sunlight reflection, high thermal-infrared emission and robust anti-contamination. This heterogeneously integrated coating is also scalable and can be utilized on arbitrary surfaces, yielding a sub-ambient temperature drop of 13.8 degrees C under strong sunlight even under long-time outdoor exposure.
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