A hydrophobic radiation refrigeration film suitable for hot summer and cold winter areas and a preparation method thereof

By using a three-layer hydrophobic radiative cooling film, combined with specific materials and a grid design, the problem of reduced film cooling capacity in hot-summer and cold-winter regions has been solved, achieving improved high-efficiency hydrophobicity and radiative cooling performance, making it suitable for the self-cleaning cooling needs of hot-summer and cold-winter regions.

CN119661935BActive Publication Date: 2026-07-14ZHEJIANG UNIV
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2024-12-03
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing radiative cooling films are easily affected by dust and rainwater when used for a long time in hot summer and cold winter regions, resulting in a decrease in cooling capacity. They fail to simultaneously possess hydrophobic and high-efficiency radiative cooling properties.

Method used

A hydrophobic radiation cooling film with a three-layer structure is produced by using ultra-high molecular weight polypropylene, high-density polypropylene, paraffin wax and functional particles to design a uniform grid structure and prepare it through a specific ratio and process. It is combined with silica, titanium dioxide and aluminum oxide particles to improve hydrophobicity and radiation cooling performance.

Benefits of technology

It achieves high efficiency in hydrophobicity and radiative cooling performance in hot summer and cold winter regions. The film has high emissivity in the 8-13 micrometer band and high reflectivity in the 300-2500 nanometer band. It also has a self-cleaning function, which improves the cooling effect and material durability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119661935B_ABST
    Figure CN119661935B_ABST
Patent Text Reader

Abstract

The application discloses a hydrophobic radiation refrigeration film suitable for hot-summer and cold-winter areas and a preparation method thereof, and the hydrophobic radiation refrigeration film is prepared from the following components: ultrahigh molecular weight polypropylene, high-density polypropylene, toluene, radiation refrigeration functional particles, hydrophobic functional particles and paraffin wax; the mass ratio of the ultrahigh molecular weight polypropylene, the high-density polypropylene, the paraffin wax, the radiation refrigeration functional particles and the hydrophobic functional particles is 10-15:5-10:60-80:5-10:5-10; the hydrophobic radiation refrigeration film has a three-layer structure, and a grid is uniformly arranged on each layer structure; the radiation refrigeration film has high reflectivity in a 300-2500nm wave band, high emissivity in an infrared atmospheric window area (wavelength 8-13um), and super-hydrophobic capacity with a contact angle of about 120 degrees with water; and therefore, the film has good application prospect in hot-summer and cold-winter areas.
Need to check novelty before this filing date? Find Prior Art