Scalable Bio-Skin-Inspired Radiative Cooling Metafabric for Breaking Trade-Off between Optical Properties and Application Requirements

• DOI: 10.1021/acsphotonics.3c00241
• Publication Date: 2023-04-17T14:47:15Z
• Authors: Xinping Zhang; Ziming Cheng; Dongling Yang; Yan Dong; Xuhang Shi; Huaxu Liang; Fuqiang Wang; Han Han; Weifeng Meng; Yong Shuai; Yuying Yan
• Keywords: Radiative Cooling; Infrared window

Passive daytime radiative cooling (PDRC) provides a zero-energy technology to reduce the global fossil energy consumption and has already attracted tremendous interest. However, breaking trade-off between pursuit of ultrahigh dual-band (solar atmospheric window) optical properties compatibility multiple functional requirements by application is still big challenge for PDRC. By introducing photon slab-porous effect with strong sunlight backward scattering inspired human skin (epidermis dermis) recorded medical infrared emittance multi-functions, we proposed an efficient property design strategy Through simple scalable dip dyeing process, fabricated bio-skin-inspired PDRC metafabric exhibited superior properties, while both solar reflectance window can reach 97%. Outdoor tests demonstrated that bio-PDRC achieved maximum sub-ambient temperature drop 12.6 °C in daytime. A wearing hat made be 16.6 cooler than one common hat. The also performance breathability, waterproofness, flexibility, strength, durability fulfill demands personal thermal management, vents, car covers.