Radiative cooling is a zero-energy-consumption cooling technology that shows great potential for outdoor human thermal management. To keep human skin comfortable in hot days, we herein develop a radiative cooling (RC) sunscreen that exhibits a low ultraviolet (UV) transmissivity (4.86%), a high solar reflectivity (90.19%), and a high mid-infrared emissivity (92.09%) to effectively provide both UV protection and skin cooling. As a result, the RC sunscreen exhibits a high cooling performance for decreasing the human skin temperature by 2.3–6.1 °C more than commercial sunscreens and 4.2–6.0 °C more than bare skin in a variety of outdoor scenarios in summer (e.g., low-humidity sunny days, high-humidity sunny days, and high-humidity cloudy days). In addition, the RC sunscreen also shows a good UV stability (12 h, 125 W), a high water resistance (106°), a long working life (30 days), and a good biocompatibility, thereby exhibiting promising commercial potentials in the sunscreen market.

中文翻译：

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高性能辐射冷却防晒霜


辐射冷却是一种零能耗的冷却技术，在户外人体热管理方面显示出巨大的潜力。为了在炎热的天气里保持人体皮肤舒适，我们特此开发了一种辐射冷却 （RC） 防晒霜，它具有低紫外线 （UV） 透射率 （4.86%）、高太阳反射率 （90.19%） 和高中红外发射率 （92.09%），可有效提供紫外线防护和皮肤冷却。因此，RC 防晒霜在夏季的各种户外场景（例如，低湿度晴天、高湿度晴天和高湿度阴天）中表现出高降温性能，比市售防晒霜多降低人体皮肤温度 2.3-6.1 °C，比裸露皮肤多降低 4.2-6.0 °C。此外，RC 防晒霜还表现出良好的紫外线稳定性（12 小时，125 W）、高防水性 （106°）、使用寿命长（30 天）和良好的生物相容性，从而在防晒霜市场上显示出有前途的商业潜力。