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.

中文翻译：

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用于辐射冷却城市热岛的光谱工程纺织品


辐射冷却纺织品有望在全球气温升高的情况下实现个人热舒适。然而，城市地区存在热岛效应，这在很大程度上降低了作为可穿戴织物的冷却纺织品的有效性，因为它们吸收了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结构（SSHF），其发射率在大气传输窗口中占主导地位，最大限度地减少了周围环境的净增热。由于纳米微混合纤维结构的强米氏散射，SSHF 具有 0.97 的高太阳光谱反射率。当白天垂直放置在模拟室外城市场景中时，SSHF 比太阳能反射宽带发射器温度低 2.3°C，并且还具有出色的可穿戴特性。