生体模擬型マイクロピラミッド構造を用いた日中放射冷却凝縮器の開発

点击翻译按钮获取中文摘要

Passive radiative cooling atmospheric water harvesting (PRC-AWH) is a promising alternative to overcome water scarcity issues as an energy-saving technique. However, it is a challenging task to ensure all-day PRC-AWH operation. Here, we report a self-cleaning, scalable and flexible hierarchical polymer film to achieve continuous (all-day) PRC-AWH which exhibits high solar reflectivity, high emissivity. Owing to its unique hybrid photonic and hierarchical structured surface, the polymer film exhibits high solar reflectivity and ideal infrared emissivity and achieves superb average subcooling throughout the day. Outdoor tests demonstrate that daytime PRC-AWH is realized in natural weather conditions to collect large amounts of water from the atmosphere. Besides, the hierarchical structures ensure the surfaces achieve superhydrophobic surfaces where the dust collected on the surface is cleared out by water droplets.