Multilayer phase change all-year energy-saving material and preparation method thereof

By utilizing the phase change properties of modified nano-vanadium dioxide, a multi-layered phase change energy-saving material with a multi-layered structure is used to solve the problems of high application cost and complex preparation of vanadium dioxide, thus achieving the effect of year-round building energy saving.

CN118342856BActive Publication Date: 2026-06-02WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Filing Date
2024-04-12
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing vanadium dioxide application technologies are costly and have complex preparation processes, making it difficult to achieve year-round building energy conservation.

Method used

The multi-layer phase change energy-saving material with a multi-layer structure includes a carbonized substrate layer, a radiation energy collection layer, and a phase change radiation switch layer. It utilizes the phase change properties of modified nano-vanadium dioxide to achieve the switching of transmission and reflection at different temperatures through spectral transformation. Combined with the effects of polymer substrate and zirconium dioxide, it achieves radiative cooling in summer and radiation absorption in winter.

Benefits of technology

It achieves efficient radiative cooling in summer and effectively absorbs solar heat in winter, reducing building energy consumption. It also has high thermal conductivity, enabling year-round energy saving.

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Abstract

The application discloses a multilayer phase change all-year energy-saving material and a preparation method thereof. The material comprises, from inside to outside, a carbonized substrate layer, a radiation energy collecting layer and a phase change radiation switch layer. The carbonized substrate layer is made of carbonized material slurry. The raw materials of the phase change radiation switch layer comprise modified nano vanadium dioxide 0.5-25 parts, a polymer substrate 20-60 parts, acetone 130-200 parts and zirconium dioxide 0.2-15 parts in terms of mass fraction. In the multilayer phase change all-year energy-saving material, the phase change radiation switch realizes the switch change of transmission and reflection at different temperatures through the spectrum change of the phase change material. The material has good radiation refrigeration function in summer, has solar reflectivity of more than 90% and atmospheric window emissivity, has solar transmittance of more than 70% in winter, absorbs solar heat through the radiation energy collecting layer to realize building heat absorption, and realizes all-year energy saving.
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