Radiative Coupled Evaporation Cooling Hydrogel for Above-Ambient Heat Dissipation and Flame Retardancy

Abstract

An all-in-one photonic hydrogel was designed for above-ambient heat dissipation and flame retardancy by sky radiative cooling and evaporation cooling. Radiative coupled with evaporation cooling can greatly improve the heat dissipation performance, indicating a 12.0 °C lower than the radiative cooling film under the same conditions. Radiative cooling-assisted adsorption can improve atmospheric water harvesting to ensure evaporation under periodic workload and meteorological parameters.