Nanometer substrate solar heat-absorbing coating and preparation method thereof

A solar energy absorption, nano-matrix technology, applied in coatings, radiation-absorbing coatings, epoxy resin coatings, etc., can solve the problems of expensive materials, poor baking resistance, complex preparation processes, etc., and achieve low emissivity and thermal efficiency. High, simple process effect

Inactive Publication Date: 2017-09-19
HEBEI JIASHICHENG ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 nano-matrix solar heat absorbing coating, comprising the following raw materials in parts by weight: 25 parts of acrylate modified composite emulsion, 2 parts of nano-scale powder pigment, 7 parts of polyvinyl alcohol, 3 parts of ethylene glycol phenyl ether, nickel salt 2 parts, 4 parts of ethylene glycol phenyl ether, 2 parts of butyl acetate, 4 parts of ultrafine graphite powder, 5 parts of film-forming aids, 3 parts of triethanolamine, 0.2 parts of dispersant, 0.5 parts of thickener, nano-dioxide Silicon 0.3 part.

[0024] The acrylate-modified composite emulsion is selected from one or a mixture of acrylate emulsions, polyurethane-modified acrylate emulsions, epoxy resin-modified acrylate emulsions and silicone-modified acrylate emulsions.

[0025] The nano-scale powder pigment is composed of nano-scale titanium, nano-scale nickel, nano-scale copper oxide and nano-scale manganese oxide powder, wherein the nano-scale titanium, nano-scale nickel, nano-scale copper ...

Embodiment 2

[0035] A nano-matrix solar heat absorbing coating, comprising the following raw materials in parts by weight: 30 parts of acrylate modified composite emulsion, 5 parts of nano-scale powder pigment, 10 parts of polyvinyl alcohol, 10 parts of ethylene glycol phenyl ether, nickel salt 4 parts, 7 parts of ethylene glycol phenyl ether, 4 parts of butyl acetate, 6 parts of ultra-fine graphite powder, 7 parts of film-forming aid, 5 parts of triethanolamine, 0.3 parts of dispersant, 0.6 parts of thickener, nano-dioxide Silicon 2.5 parts.

[0036] The acrylate-modified composite emulsion is selected from one or a mixture of acrylate emulsions, polyurethane-modified acrylate emulsions, epoxy resin-modified acrylate emulsions and silicone-modified acrylate emulsions.

[0037] The nano-scale powder pigment is composed of nano-scale titanium, nano-scale nickel, nano-scale copper oxide and nano-scale manganese oxide powder, wherein the nano-scale titanium, nano-scale nickel, nano-scale copp...

Embodiment 3

[0046] A nano-matrix solar heat absorbing coating, comprising the following raw materials in parts by weight: 35 parts of acrylate modified composite emulsion, 8 parts of nano-scale powder pigment, 12 parts of polyvinyl alcohol, 15 parts of ethylene glycol phenyl ether, nickel salt 6 parts, 10 parts of ethylene glycol phenyl ether, 6 parts of butyl acetate, 8 parts of ultrafine graphite powder, 10 parts of film-forming aids, 7 parts of triethanolamine, 0.4 parts of dispersant, 0.7 parts of thickener, nano-dioxide Silicon 3.5 parts.

[0047] The acrylate-modified composite emulsion is selected from one or a mixture of acrylate emulsions, polyurethane-modified acrylate emulsions, epoxy resin-modified acrylate emulsions and silicone-modified acrylate emulsions.

[0048] The nano-scale powder pigment is composed of nano-scale titanium, nano-scale nickel, nano-scale copper oxide and nano-scale manganese oxide powder, wherein the nano-scale titanium, nano-scale nickel, nano-scale co...

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Abstract

The invention discloses a nanometer substrate solar heat-absorbing coating which is characterized by comprising the following raw materials in parts by weight: 25-35 parts of acrylate modified composite emulsion, 2-8 parts of nanometer powder pigment, 7-12 parts of polyvinyl alcohol, 3-15 parts of phenoxyethanol, 2-6 parts of nickel salt, 4-10 parts of glycol phenylate, 2-6 parts of n-butyl acetate, 4-8 parts of superfine graphite powder, 5-10 parts of a coalescing agent, 3-7 parts of triethanolamine, 0.2-0.4 part of a dispersing agent, 0.5-0.7 part of a thickening agent and 0.3-3.5 parts of nanometer silicon dioxide. The nanometer substrate solar heat-absorbing coating provided by the invention takes the nanometer powder pigment as a raw material, so that the coating material has high heat efficiency and excellent properties of high spectral selectivity and visible light absorptivity and low emissivity.

Description

technical field [0001] The invention belongs to the field of heat-absorbing coatings, in particular to a nano-matrix solar heat-absorbing coating and a preparation method thereof. Background technique [0002] At present, it is generally used in the market to spray black organic coatings on the heat-absorbing plate core of the flat collector, such as black fluorocarbon resin, black epoxy resin, black polyurethane resin, etc., because ordinary resin materials are used as adhesives. 2. Since ordinary carbon black or black pigments are used as the color body, there will be no spectrum Selectivity, so its coating emissivity is very high, which results in low thermal efficiency of solar panel collectors. [0003] The selective absorbing layer is the core functional part of the light absorbing system for absorbing light energy, and is usually used in solar heat collecting elements or solar selective absorbing coating systems. The structure of the solar selective absorption coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D175/04C09D163/00C09D129/04C09D5/32C09D7/12
CPCC09D133/04C08K2003/0862C08K2003/0881C08K2003/2248C08K2003/2262C08K2201/011C08L2201/08C08L2203/204C08L2205/035C09D5/32C09D129/04C09D163/00C09D175/04C08L75/04C08L63/00C08L33/04C08L29/04C08K13/02C08K3/22C08K3/08C08K3/04C08K3/36
Inventor 白莉莉
Owner HEBEI JIASHICHENG ENERGY TECH CO LTD
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