A radiation cooling coating with long afterglow luminescence performance and its preparation method

Abstract

The invention belongs to the field of new materials, and more specifically relates to a radiation cooling coating with long afterglow luminescence performance and a preparation method thereof. The coating includes a radiative cooling layer, and also includes a long afterglow luminous layer arranged on the surface of the radiative cooling layer; the radiative cooling layer realizes cooling through heat radiation in the mid-infrared band range and light reflection in the visible light band range at the same time The long afterglow luminescent layer contains long afterglow luminescent materials, the absorption peak of the long afterglow luminescent material is between the sunlight bands, and the emission peak is between the visible light bands; when in use, the long afterglow luminescent layer absorbs sunlight energy and converts it It is visible light that is easily reflected by the radiation cooling layer, thereby reducing the energy absorbed by the radiation cooling layer and improving the radiation cooling power of the radiation cooling layer; on the other hand, the energy reflected by the radiation cooling layer is further illuminated by the long afterglow The layer absorbs and emits light, thereby improving the luminous efficiency of the long-lasting light-emitting layer.

Description

technical field [0001] The invention belongs to the field of new materials, and more particularly relates to a radiation refrigeration coating with long afterglow luminescence properties and a preparation method thereof. Background technique [0002] The two major problems of global warming and energy crisis are becoming more and more serious and affecting people's lives. In recent years, radiation refrigeration technology, which can alleviate the above two problems at the same time, has gradually emerged. [0003] Radiation refrigeration technology is a zero-energy-consumption refrigeration technology, which means that the heat source realizes heat exchange with the outer space cold source (~3K) through the infrared window of the atmosphere in the form of thermal radiation. Radiation refrigeration technology is of great significance for environmental protection and cooling energy saving. The specific principle of radiation cooling is: on the one hand, the surface of the m...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the object of the present invention is to provide a radiation cooling coating with long afterglow luminescence performance and its preparation method, which combines the refrigeration principle and characteristics of the existing radiation cooling coating with the long afterglow luminescent material The principle and characteristics of the traditional radiative cooling coating are creatively introduced into the long afterglow luminescent layer, and the long afterglow luminescent layer can convert sunlight into visible light that is easily reflected by the radiative cooling layer, correspondingly reducing the energy absorbed by the radiative cooling layer. In order to improve its cooling efficiency; and also use the long afterglow luminescent material to change the luminous color, which cleverly solves the technical defect of the single color of the existing radiative cooling coating, and is especially suitable for cooling and saving energy on the outer surfaces of buildings, automobiles, etc.

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