Hollow glass / tiO2 super-hydrophobic radiative cooling coating, method and applications thereof

CN121574622BActive Publication Date: 2026-06-23QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
Filing Date
2025-12-18
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing radiation cooling coatings are prone to contamination on building surfaces, which can reduce their radiation cooling capacity. Furthermore, the coatings have insufficient adhesion to the substrate and poor wear resistance, limiting their large-scale application in industrial production.

Method used

A superhydrophobic radiation cooling coating was prepared by spraying a mixture of triethoxy-1H,1H,2H,2H-tridecylfluoro-N-octylsilane modified hollow glass microspheres and TiO2, with epoxy resin E51 added as a binder. The coating has a water contact angle of 154° and the adhesion strength to the substrate is improved by using silane coupling agent KH550.

Benefits of technology

The superhydrophobic radiation cooling coating retains a hydrophobic effect of 140° after 120 wear cycles and can achieve a cooling effect of 14°C under a solar radiation intensity of 600 W/m2, demonstrating excellent self-cleaning ability and radiation cooling performance.

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Abstract

The present application belongs to the field of new materials, and particularly relates to a hollow glass / TiO2 super-hydrophobic radiative cooling coating, a method and application thereof. The present application uses triethoxy-1H, 1H, 2H, 2H-tridecafluoro-N-octylsilane (PFOTES) to modify hollow glass microspheres (GB), obtains F-GB particles with low surface energy and high reflectivity, and then adds TiO2, uses epoxy resin E51 and silane coupling agent KH550 as adhesives, performs uniform spraying operation, and after drying, repeats the above operation once to obtain a coating with high reflectivity. The coating has a water contact angle of 154 o , and has excellent cleaning ability for liquid and solid pollutants on the surface of the coating. Meanwhile, the coating has a highest solar reflectivity of 92.5% and high infrared emissivity, can realize a cooling effect of 14 o C or so, and has excellent radiative cooling performance. The coating can still maintain self-cleaning ability and radiative cooling ability after 120 abrasion cycles.
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