Selective heat-absorbing material

Abstract

The invention discloses a selective heat-absorbing material, which is obtained by uniformly dispersing a light absorbent, a film forming agent, a solvent and an auxiliary in a ball milling manner and adding a film forming auxiliary for mixing. The selective heat-absorbing material comprises the following raw materials in parts by weight: 50 to 100 parts of the film forming agent, 10 to 30 parts of the film forming auxiliary, 35 to 55 parts of the light absorbent, 20 to 50 parts of the solvent and 10 to 30 parts of the auxiliary, wherein the light absorbent is prepared to be blue and the like by virtue of Fe4O3 powder, lead sulfide and cobalt blue powder; a preparation method for the film forming agent comprises the following steps of mixing silkworm proteins and gelatin according to the weight ratio of the silkworm proteins to the gelatin being (5-10):(2-3), adding water, performing soaking at 15 to 22 DEG C, adding a mixed solution of hydroxyl methyl methacrylate and ethyl acrylate in the weight part ratio of hydroxyl methyl methacrylate to ethyl acrylate being (1-2):(1-3), performing stirring, and performing irradiation for 10 to 15min with ultraviolet light to obtain modified silkworm protein-gelatin. According to the selective heat-absorbing material, the film forming agent is modified to serve as an important raw material for preparing the selective heat-absorbing material, so that the prepared material can be endowed with high weather resistance and waterproofness under an outdoor condition; moreover, a preparation process is simple and easy to understand, and the heat absorption efficiency of the heat-absorbing material is further ensured.

Description

technical field [0001] The invention relates to endothermic materials, in particular to a selective endothermic material. Background technique [0002] Energy utilization plays a pivotal role in the development of human society, but the excessive development of resources and inefficient resource utilization make human beings face a severe test. As we all know, solar energy is the most abundant and widely available renewable energy, which plays a major role in solving energy crisis and environmental problems. , making it a hot research topic in various countries. Our country is rich in solar energy resources and has broad prospects for solar energy utilization. At present, it is the first user and producer of solar water heaters in the world. [0003] Solar thermal application is one of the simplest, most direct, and most effective ways for human beings to utilize solar energy. However, due to the small and discontinuous energy density of solar energy after reaching the ear...

AI Technical Summary

Problems solved by technology

[0005] The current solar heat-absorbing coatings are full of researches specifically aimed at the weather resistance and water resistance of solar energy coatings. Nowadays, nano-materials are used as raw materials for heat-absorbing materials, which can improve the weather resistance and heat-absorbing efficiency of coatings. For example, Chinese patent CN102286243A , but the cost is extremely high; there are also changes in the formulation of pigments to improve the weather resistance of the prepared coatings, such as Chinese patent CN102134428B, but its preparation process is complicated and requires high

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