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A kind of metal-ceramic nano-matrix solar heat absorbing coating material and the preparation method of the coating

A technology for solar energy absorption and coating materials, applied in the field of solar energy, can solve the problems of expensive materials, poor baking resistance, complicated preparation process, etc., and achieve the effects of low emissivity, good weather resistance of coatings, and good light transmittance.

Inactive Publication Date: 2016-09-28
HANGZHOU LINAN CHENGYI SOLAR ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The key to preparing an excellent selective absorbing coating lies in the selection of materials and preparation processes with better solar spectrum selectivity. The current coatings mostly choose aluminum as the sputtering cathode, which reacts with nitrogen to form a film in the form of a gradient film. This kind of film is suitable for low-temperature vacuum use, and its baking resistance is poor; the baking resistance of the film prepared by interference film is better than that of gradient film, but the optical constants and thickness of each layer must be precisely controlled during preparation. The process is complex and the materials involved are relatively expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A cermet nano-based solar heat absorption coating material, the preparation steps are as follows:

[0024] The first step is to prepare a solvent, which is composed of glycol phenyl ether and xylene (weight ratio is 1:2);

[0025] The second step is to prepare resin, which is 1000:1 liquid composed of acrylic acid and dispersant;

[0026] The third step is to prepare nano powder material, which is composed of nano titanium, nano nickel, copper oxide, and titanium nitride (weight ratio is 1:1:2:2);

[0027] The fourth step is mixing and grinding. Add the powder material and resin to the solvent, put it into the grinder and mix and grind, time 20 hours, temperature ≤20℃, grind the powder material evenly in the solvent to form the ceramic water-based nano titanium coating;

[0028] The fifth step is electrostatic spraying, using strong magnetic eddy current high pressure adsorption technology to spray the prepared paint on the aluminum alloy plate core of the solar collector, room ...

Embodiment 2

[0035] A cermet nano-based solar heat absorption coating material, the preparation steps are as follows:

[0036] The first step is to prepare a solvent. The solvent is composed of ethylene glycol phenyl ether, cyclohexanone, and butyl acetate (weight ratio is 1: 1: 1);

[0037] The second step is to prepare resin, which is 1000:1 liquid composed of acrylic acid and dispersant;

[0038] The third step is to prepare nano powder material, which is composed of nano titanium, nano nickel, copper oxide, and titanium nitride 1:1:2:2;

[0039] The fourth step is mixing and grinding. Add the powder material and resin to the solvent, put it into the grinder and mix and grind, time 20 hours, temperature ≤20℃, grind the powder material evenly in the solvent to form the ceramic water-based nano titanium coating;

[0040] The fifth step is electrostatic spraying, using strong magnetic eddy current high pressure adsorption technology to spray the prepared paint on the aluminum alloy plate core of th...

Embodiment 3

[0047] A cermet nano-based solar heat absorption coating material, the preparation steps are as follows:

[0048] The first step is to prepare a solvent, which is composed of ethylene glycol phenyl ether, cyclohexanone and butyl acetate (weight ratio is 1:1:1);

[0049] The second step is to prepare resin, which is 1000:1 liquid composed of acrylic acid and dispersant;

[0050] The third step is to prepare nano powder material, which is composed of nano titanium, nano nickel, copper oxide and manganese oxide 1:1:2:2

[0051] The fourth step is mixing and grinding. Add the powder material and resin to the solvent, put it into the grinder and mix and grind, time 20 hours, temperature ≤20℃, grind the powder material evenly in the solvent to form the ceramic water-based nano titanium coating;

[0052] The fifth step is electrostatic spraying, using strong magnetic eddy current high pressure adsorption technology to spray the prepared paint on the aluminum alloy plate core of the solar coll...

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Abstract

The invention discloses a metal-ceramic nano-matrix solar heat-absorbing coating material. The components of the coating material include a film-forming material, a color-forming body and a solvent, and the film-forming material is composed of a highly transparent acrylic resin material. The color body is a nano-scale powder pigment, the solvent is a mixed solvent composed of xylene and ethylene glycol phenyl ether, and the weight ratio of the film-forming substance to the color body and the solvent is 4-5:6-8:12- 13. The invention also discloses a preparation method of the coating. The invention adopts nano-scale powder pigment, and the coating material has the good properties of spectral selectivity, high visible light absorption rate and low emissivity. Using the coating material of the invention to prepare the solar heat absorbing coating has a simple process. After grinding to form a dispersion system, it can be directly sprayed on the sunny side of the core of the solar heat absorbing plate, no special equipment is required, and the preparation cost is low.

Description

Technical field [0001] The invention belongs to the technical field of solar energy, and specifically relates to a metal ceramic nano-matrix solar heat absorption coating material, and the invention also relates to a preparation method of the coating. Background technique [0002] At present, it is commonly used in the market to spray black organic coatings on the heat-absorbing core of flat-plate collectors, such as black fluorocarbon resin, black epoxy resin, black polyurethane resin, etc., because ordinary resin materials are used for bonding As the color body, carbon black or black pigment is used as the color body, so it will cause: 1. The coating is not weather-resistant, premature chalking and fading, 2. Because ordinary carbon black or black pigment is used as the color body, there is no spectrum Selectivity, so its coating has a high emissivity, which results in low thermal efficiency of the solar flat panel collector. [0003] According to the "Twelfth Five-Year Plan for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D7/12
Inventor 毛乘胜施征东陆春
Owner HANGZHOU LINAN CHENGYI SOLAR ENERGY TECH
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