Radiation refrigeration film and product provided with same

Abstract

The invention relates to a radiation refrigeration film and a product provided with the same. The radiation refrigeration film comprises a carrier layer, a reflection layer and an emission layer which are stacked. The emission layer is located on the light incident side of the radiation refrigeration film and is made of a polymer containing a C-F bond. The carrier layer is made of a polymer containing a C-C bond and/or a C-O bond. After the carrier layer is placed at 120 DEG C for 30 minutes, the thermal shrinkage rate of the carrier layer in the transverse direction is smaller than or equal to 2%, the thermal shrinkage rate of the carrier layer in the longitudinal direction is smaller than or equal to 3%, the thickness of the radiation refrigeration film ranges from 50 micrometres to 170 micrometres, and the thickness of the emission layer accounts for 20%-90% of the total thickness. According to the radiation refrigeration film provided by the invention, by optimizing the material, the structure and the thickness of the radiation refrigeration film, the radiation refrigeration film has excellent atmospheric window emissivity under the condition that radiation refrigeration particles do not need to be added, so that adverse effects of the addition of the radiation refrigeration particles on the mechanical properties and the weather resistance of the radiation refrigeration film are avoided, and therefore, the radiation refrigeration film has more excellent mechanical properties and weather resistance.

Description

technical field [0001] The invention relates to the technical field of new materials and the technical field of energy saving, in particular to a radiation cooling film and its products. Background technique [0002] In the field of energy-saving technology, the radiative cooling film can transfer the surface heat of objects to outer space in the form of infrared radiation in the atmospheric window (8μm-13μm) band, achieving the purpose of cooling without energy consumption. like figure 1 As shown, it is a traditional radiative cooling film, which includes a first base layer 11, a first reflective layer 12 and a first emissive coating 13 that are stacked in sequence, wherein the first emissive coating 13 is cured by fluorine-containing resin , the first radiation cooling particles 14 are also distributed in the first emissive coating 13 . In this radiation cooling film, the first radiation cooling particles 14 are added in the first emissive coating 13. On the one hand, it...

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Problems solved by technology

However, adding the second radiative refrigeration particles 25 to the colloid will also increase the water and oxygen permeability of the colloid, thereby reducing the weather resistance of the radiative cooling film; in addition, adding the second radiative cooling particles 25 to the colloid will Reducing the cohesive force of the colloid will reduce the integrity of the radiative cooling film. At the same time, it will also destroy the internal structure of the colloid and reduce the cohesive force of the colloid, which will also lead to a decrease in the mechanical properties of the radiative cooling film.

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