该研究团队成功开发出一种随机光子复合材料，该材料结合了微孔玻璃框架与氧化铝颗粒，不仅具有选择性的长波红外发射能力，还能维持较高的太阳反射率。在制造过程中，氧化铝颗粒强烈散射阳光，有效防止了多孔结构的致密化。实际测试表明，这种微孔玻璃涂层在正午和夜间的高湿度环境（湿度高达80%）下，能分别降低温度约3.5°C和4°C。值得一提的是，这种被称为“冷却玻璃”的涂层在面临各种恶劣环境，如水、紫外线辐射、污染和高温等条件下，仍能保持优异的太阳能反射性能。
据悉，被动式日间辐射冷却材料能够通过反射阳光并向寒冷的宇宙（~3开尔文）发射长波红外（LWIR）辐射，从而将建筑物冷却所需的能量降低60%。然而，开发这种被动冷却结构既要满足制造和应用的需求，又要表现出长期的环境稳定性，这是一项颇具挑战性的任务。
附：英文原文
Title: A solution-processed radiative cooling glass
Author: Xinpeng Zhao, Tangyuan Li, Hua Xie, He Liu, Lingzhe Wang, Yurui Qu, Stephanie C. Li, Shufeng Liu, Alexandra H. Brozena, Zongfu Yu, Jelena Srebric, Liangbing Hu
Issue&Volume: 2023-11-10
Abstract: Passive daytime radiative cooling materials could reduce the energy needed for building cooling up to 60% by reflecting sunlight and emitting long-wave infrared (LWIR) radiation into the cold Universe (~3 kelvin). However, developing passive cooling structures that are both practical to manufacture and apply while also displaying long-term environmental stability is challenging. We developed a randomized photonic composite consisting of a microporous glass framework that features selective LWIR emission along with relatively high solar reflectance and aluminum oxide particles that strongly scatter sunlight and prevent densification of the porous structure during manufacturing. This microporous glass coating enables a temperature drop of ~3.5° and 4°C even under high-humidity conditions (up to 80%) during midday and nighttime, respectively. This radiative “cooling glass” coating maintains high solar reflectance even when exposed to harsh conditions, including water, ultraviolet radiation, soiling, and high temperatures.
DOI: adi2224
Source: https://www.science.org/doi/10.1126/science.adi2224