Radiation refrigeration composite coating with structural color, application and preparation method

Abstract

The invention discloses a radiation refrigeration composite coating with structural color, application and a preparation method. The radiation refrigeration composite coating comprises a base layer, and reflection nanoparticles and color forming nanoparticles embedded in the base layer, wherein a reflection valley jointly realized by broadband high reflection of the reflection nanoparticles and local plasmon resonance of the color forming nanoparticles presents the structural color of the radiation refrigeration composite coating. The radiation refrigeration composite coating has relatively strong reflecting capacity in a sunlight wave band (0.3-4 microns), and the reflectivity in most of the sunlight wave bands is up to 0.95. The emissivity in the infrared band (4-24 [mu] m) can be continuously 0.9 or above, and the emissivity in most of the infrared bands can be up to 0.95. The invention can overcome the problem of limited application occasion due to single color of the existing radiation refrigeration coating, thereby having broad application prospects in the fields of building energy saving, surface heat management of outdoor objects and electronic products and the like.

Description

technical field [0001] The invention belongs to the field of spectrally selective nanoparticles, in particular to a radiation refrigeration composite coating with structural color, its application and its preparation method. Background technique [0002] With the development of modern society, human consumption and demand for energy are increasing day by day. At present, the energy problem has evolved into a global problem. At the same time, due to the aggravation of climate problems such as global warming and the greenhouse effect, the global demand for refrigeration continues to rise. The cooling process of active refrigeration equipment, such as air conditioners and fans, inevitably consumes a lot of energy. [0003] Radiation cooling is a high-emissivity structure covering the infrared band (especially the atmospheric window bands of 8-13 μm and 16-24 μm) on the object to realize the radiation heat exchange between the object and the low-temperature outer space and the...

AI Technical Summary

Problems solved by technology

The radiation cooling composite coating can be prepared on a large scale, and solves the problem of limited application space of the existing conventional radiation cooling structure due to single color, and at the same time solves the poor color stability of the existing pigment-forming radiation cooling structure, which is easy to fade and refrigerates. The problem of poor performance

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