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

## TL;DR

This review discusses how porous cooling films made using the phase separation method can help reduce energy use by passively cooling surfaces.

## Contribution

The paper provides a comprehensive review of phase separation methods for creating porous radiative cooling films and their potential applications.

## Key findings

- Phase separation is a cost-effective and scalable method for making porous radiative cooling films.
- These films show excellent cooling performance and are suitable for green buildings and food preservation.
- Structural design plays a key role in enhancing the radiative cooling efficiency of the films.

## Abstract

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.