A bioinspired and scalable near-ideal broadband coating for radiative thermoregulation

Abstract

Passive daytime radiative cooling has been widely acknowledged to be an environment-friendly pathway to realize considerable cooling effect. A broadband radiative coating is more favorable for thermoregulations where the temperature...

Preparation and cooling performance analysis of double-layer radiative cooling hybrid coatings with TiO2/SiO2/Si3N4 micron particles

“…[15], the increase in emission is better than the increase in absorption, and the broadband emitter has a better cooling capacity. [15,34,35] In practical applications, the building surface temperature is higher than the atmospheric temperature under direct daytime sunlight conditions. The material temperature for radiative cooling over the building surface is usually set to be higher than the atmospheric temperature.…”

Diatomite-Based Recyclable and Green Coating for Efficient Radiative Cooling

“…Consequently, the adoption of innovative energy-efficient cooling designs [2] and eco-friendly solutions [3] is urgently needed. Radiative cooling, an energyefficient and sustainable cooling approach, addresses energy and environmental concerns by reflecting solar radiation (0.25-2.5 µm) and emitting infrared radiation into outer space through the Atmospheric Transparent Spectral Window (ATSW, 8-14 µm) [4,5].…”

MOF-Integrated Hierarchical Composite Fiber for Efficient Daytime Radiative Cooling and Antibacterial Protective Textiles

“…The most common one is the active cooling technology based on the vapor compression system; however, it consumes a large amount of power and needs complicated equipment, which is not appropriate for outdoor and personal applications. , Other technologies, including the use of phase change materials, semiconductor-cooling textiles, air-cooling textiles, , and liquid-cooling textiles, are not mature enough as personal cooling equipment due to limitations of weight, volume, and cost. Passive daytime radiative cooling (PDRC), as a zero-power cooling technology, offers another promising approach for personal thermal management (PTM), through rationally regulating the immediate microclimate around the human body that provides thermal comfort. − Recently, state-of-the-art PTM textiles have been developed, such as nanofiber membranes, − nanoporous membranes, − microfiber fabrics, , and coating fabrics, − and demonstrated excellent cooling ability through strongly shielding against incident solar radiation and dissipating heat energy via mid-infrared (MIR) emission through the atmosphere’s longwave infrared (LWIR) transparency window to the ultra-cold outer space. − …”