Research Progress of Porous Radiative Cooling Films Based on Phase Separation Method

In recent years, against the backdrop of increasingly prominent global climate change and environmental issues, high-efficiency cooling technologies and energy-saving materials have become key research focuses. Radiative cooling, which reflects sunlight and emits thermal radiation into outer space, enables passive cooling without energy consumption. The phase separation method has emerged as a promising approach for fabricating porous daytime radiative cooling materials, attracting extensive research interest due to its favorable processability, excellent cooling performance, low cost, and scalability. Based on radiative cooling principles, this review summarizes the preparation methods, structural design, and application fields of porous radiative cooling films fabricated via the phase separation method. Furthermore, it is suggested that phase-separated porous radiative cooling films hold great potential in green buildings, personal thermal management, and food preservation.