Zhao Huaixia, Sun Qiangqiang, Zhou Ji, Deng Xu, Cui Jiaxi
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China.
INM-Leibniz Institute for New Materials Campus D2 2, Saarbrücken, 66123, Germany.
Adv Mater. 2020 Jul;32(29):e2000870. doi: 10.1002/adma.202000870. Epub 2020 Jun 5.
Space cooling and heating currently result in huge amounts of energy consumption and various environmental problems. Herein, a switching strategy is described for efficient energy-saving cooling and heating based on the dynamic cavitation of silicone coatings that can be reversibly and continuously tuned from a highly porous state to a transparent solid. In the porous state, the coatings can achieve efficient solar reflection (93%) and long-wave infrared emission (94%) to induce a subambient temperature drop of about 5 °C in hot weather (≈35 °C). In the transparent solid state, the coatings allow active sunlight permeation (95%) to induce solar heating to raise the ambient temperature from 10 to 28 °C in cold weather. The coatings are made from commercially available, cheap materials via a facile, environmentally friendly method, and are durable, reversible, and patternable. They can be applied immediately to various existed objects including rigid substrates.
目前，空间制冷和制热导致大量的能源消耗以及各种环境问题。在此，本文描述了一种基于有机硅涂层动态空化的高效节能制冷和制热切换策略，该涂层可以从高度多孔状态可逆且连续地调谐为透明固体。在多孔状态下，涂层可实现高效的太阳反射（93%）和长波红外发射（94%），从而在炎热天气（约35°C）中使温度下降约5°C。在透明固体状态下，涂层允许阳光有效透过（95%），以在寒冷天气中将环境温度从10°C升高到28°C。这些涂层由市售的廉价材料通过简便、环保的方法制成，并且耐用、可逆且可图案化。它们可以立即应用于包括刚性基材在内的各种现有物体。
