Related Experiment Video
Updated: May 31, 2025
10:27
The Evolution of Silica Nanoparticle-polyester Coatings on Surfaces Exposed to Sunlight
Published on: October 11, 2016
9.5K
Auto-Deposited Microparticle Composite Coating for Low-Cost and Efficient Daytime Radiative Cooling
Xuefeng Tian1, Huaiyuan Wang1, Yuanwei Lu1
1School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
ACS Applied Materials & Interfaces
|January 22, 2025
Summary
This study presents an auto-deposited SiO2 composite radiative cooling coating (ADRC) that significantly reduces particle content for large-scale application. The novel coating achieves substantial daytime cooling, offering a sustainable solution for buildings to combat global warming.
Area of Science:
- Materials Science
- Nanotechnology
- Sustainable Energy
Background:
- Radiative cooling is a key strategy for mitigating global warming by enhancing heat flux away from Earth.
- Traditional radiative cooling materials require high particle concentrations, hindering practical application due to cost and scalability issues.
Purpose of the Study:
- To develop a cost-effective and scalable radiative cooling coating with reduced particle content.
- To investigate the performance of an auto-deposited SiO2 composite radiative cooling coating (ADRC).
Main Methods:
- Inspired by gravity-induced particle deposition, an auto-deposition method was employed to create a particle density gradient structure.
- The coating's solar reflectance and infrared emissivity were measured.
Main Results:
- The ADRC exhibits high solar reflectance (93%) and infrared emissivity (89%).
- A daytime subambient temperature drop of 12 °C was achieved.
- The cooling energy-saving potential for buildings in China was estimated between 6.42% and 13.52%.
Conclusions:
- The developed low-cost and scalable ADRC effectively reduces particle requirements for radiative cooling applications.
- This technology has the potential to significantly reduce building energy consumption and carbon emissions, addressing global warming.
