A kind of solar absorbing film and preparation method thereof

Abstract

The invention relates to a solar energy absorbing film and a preparation method thereof, which is made of the following raw materials in weight ratio: 1-5 nanometer magnetic iron powder; 10-15 nanometer manganese dioxide powder; 3-8 nanometer titanium powder; Silicon oxide powder 5~10; nano chromium oxide powder 1~5; nano cuprous oxide powder 10~15; additives 1~3; inorganic composite ceramic resin 30~50; xylene 30~50; butyl acetate 10~20 ; Ethylene glycol 5-10. The film layer prepared by using the raw material of the present invention can improve the weather resistance of the film layer. The film layer is not only resistant to salt spray, high temperature, and has anti-ultraviolet aging performance, but also solves the problems of environmental protection and high energy consumption in the production process. The invention adopts a spraying method to uniformly deposit the material on the surface of the substrate, and the preparation method is simple. The thickness of the prepared solar absorbing film is less than 800nm, the absorption ratio of the prepared film is greater than 95%, and the infrared heat emission ratio is less than 10%.

Description

technical field [0001] The invention relates to an absorbing film, in particular to a solar absorbing film, and also to the above-mentioned preparation method. Background technique [0002] With the acceleration of urbanization, solar panel collectors are increasingly favored by consumers due to their perfect integration with buildings. The solar absorbing film layer is the core component of the heat collector, and its performance directly affects the use effect and life of the entire heat collector. At present, the coatings on the market mainly include coating coatings, electroplating coatings and magnetron sputtering coatings. However, the paint film layer on the market generally adopts organic coating, such as black acrylic resin, black epoxy resin, etc., because the common resin material is used as the adhesive of the film layer, so it will cause: 1. The film layer The weather resistance is poor, and the powdering and fading of the film layer appear. 2. Since ordinary ...

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Problems solved by technology

However, the paint film layer on the market generally adopts organic coating, such as black acrylic resin, black epoxy resin, etc., because the common resin material is used as the adhesive of the film layer, so it will cause: 1. The film layer The weather resistance is poor, and the powdering and fading of the film layer appear. 2. Since ordinary black fillers are used as the absorber of the film layer, the selectivity of the film layer is poor, which leads to a very high thermal emission ratio of the film layer. High; the preparation process of the electroplating film layer is polluted and cannot meet the needs of environmental protection; the manufacturing equipment of the magnetron sputtering film layer is expensive, and the salt spray resistance of the film layer is not ideal, and the film layer is prone to peeling off after a long time. Affect the normal use of the collector

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