High radiation cooling performance composite fiber membrane PVDF-HFP / PDMS and preparation method thereof

By combining PVDF-HFP with PDMS and preparing nanofiber structures using electrospinning, the problems of complexity and high cost in the preparation of radiative cooling materials have been solved, achieving efficient and environmentally friendly radiative cooling effects, which are applicable to fields such as construction and wearable fabrics.

CN115928323BActive Publication Date: 2026-05-08NANJING UNIV
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Patent Information

Application Number
CN202210019521.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-01-07
Publication Date
2026-05-08
Estimated Expiration
2042-01-07

AI Technical Summary

Technical Problem

Existing radiative cooling materials suffer from complex manufacturing processes, high costs, and insufficient radiative cooling performance. Furthermore, they cannot achieve a balance in terms of overall material properties, such as wear resistance, water resistance, and air permeability.

Method used

Nanofiber structures were prepared by combining PVDF-HFP and PDMS using electrospinning. The -CF3 groups in PVDF-HFP and the Si-O-Si bonds in PDMS improved the infrared emissivity and solar reflectivity, respectively, forming a composite fiber membrane with high radiation cooling performance.

Benefits of technology

It achieves efficient radiative cooling performance, with significant cooling effects both day and night. The preparation process is simple, environmentally friendly, and low-cost, making it suitable for large-scale production. The product has advantages such as high reflectivity, infrared emissivity, tensile strength, and water resistance.

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Abstract

The present application belongs to the field of radiation cooling material design, and relates to a high-radiation cooling performance composite fiber membrane PVDF-HFP / PDMS and a preparation method thereof, characterized by preparing a composite fiber membrane with uniform single nanofiber and excellent radiation cooling effect by using a mixed solution of polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) and polydimethylsiloxane (PDMS). The preparation method has the advantages of simple preparation method, environmental friendliness, large-size preparation, easy scaling, etc., and makes up for the problems of the existing radiation cooling materials, such as insufficient daytime cooling effect, hydrophobicity, poor flexibility, insufficient tensile resistance and the like.
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