Wu Ronghui, Sui Chenxi, Chen Ting-Hsuan, Zhou Zirui, Li Qizhang, Yan Gangbin, Han Yu, Liang Jiawei, Hung Pei-Jan, Luo Edward, Talapin Dmitri V, Hsu Po-Chun
Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA.
Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
Science. 2024 Jun 14;384(6701):1203-1212. doi: 10.1126/science.adl0653. Epub 2024 Jun 13.
Radiative cooling textiles hold promise for achieving personal thermal comfort under increasing global temperature. However, urban areas have heat island effects that largely diminish the effectiveness of cooling textiles as wearable fabrics because they absorb emitted radiation from the ground and nearby buildings. We developed a mid-infrared spectrally selective hierarchical fabric (SSHF) with emissivity greatly dominant in the atmospheric transmission window through molecular design, minimizing the net heat gain from the surroundings. The SSHF features a high solar spectrum reflectivity of 0.97 owing to strong Mie scattering from the nano-micro hybrid fibrous structure. The SSHF is 2.3°C cooler than a solar-reflecting broadband emitter when placed vertically in simulated outdoor urban scenarios during the day and also has excellent wearable properties.
在全球气温不断上升的情况下，辐射冷却纺织品有望实现个人热舒适。然而，城市地区存在热岛效应，这在很大程度上降低了冷却纺织品作为可穿戴织物的有效性，因为它们会吸收来自地面和附近建筑物发出的辐射。我们通过分子设计开发了一种中红外光谱选择性分层织物（SSHF），其发射率在大气传输窗口中占主导地位，从而将来自周围环境的净热增益降至最低。由于纳米-微混合纤维结构产生的强烈米氏散射，SSHF具有0.97的高太阳光谱反射率。在白天垂直放置于模拟户外城市场景中时，SSHF比太阳能反射宽带发射器低2.3°C，并且还具有出色的可穿戴性能。
