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High-temperature-resistant light absorption coating and preparation method thereof

A light-absorbing coating and high-temperature-resistant technology, applied in coatings, radiation-absorbing coatings, fire-resistant coatings, etc., can solve problems such as discoloration, peeling, instability, etc., achieve low cost, good bonding force, and eliminate stray light effects

Active Publication Date: 2022-01-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main commercial light-absorbing coatings in China include inorganic and organic. Among them, the organic light-absorbing coating mainly uses carbon black as a black pigment to absorb light, uses resin as a matrix or binder, and uses various additives to increase the amount of black paint. Generally, the temperature resistance range of this type of organic coating is 200-250°C; the inorganic light-absorbing coating is mainly blackened by anodized aluminum, and the service temperature of this type of coating is within 250°C and higher than 250°C ℃It is very unstable when in service, and problems such as discoloration and peeling often occur

Method used

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  • High-temperature-resistant light absorption coating and preparation method thereof
  • High-temperature-resistant light absorption coating and preparation method thereof
  • High-temperature-resistant light absorption coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] In this embodiment, the base is made of stainless steel with a thickness of 2 mm, and the process of preparing the high-temperature resistant light-absorbing coating on the base is as follows:

[0046] (1) Add 100 mL of N,N-dimethylacetamide, 0.5 g of multi-walled carbon nanotubes, 1.5 g of fullerenes, 1 g of silica, and 0.08 g of polyvinylpyrrolidone into the container, and use a high-frequency ultrasonic Ultrasonic 20min, power 750W, frequency 20KHz to obtain a uniform mixed solution, wherein the multi-walled carbon nanotubes are 20-30μm in length, 5-10nm in diameter, the average particle size of fullerenes is 5-10nm, and the average particle size of silica is 5-10nm. The size is 10 μm; 8.5 g of 4,4'-diaminodiphenyl ether and 10 g of pyromellitic anhydride are added to the uniform mixed solution in turn and magnetically stirred for 30 minutes to obtain a stable and dispersed composite suspension;

[0047] (2) The substrate is washed with alcohol and acetone for severa...

Embodiment 2

[0051] In this embodiment, the substrate is made of Ti with a thickness of 2 mm. 6 Al 4 V, the process of preparing the high temperature resistant light absorbing coating on the substrate is as follows:

[0052] (1) Add 100mL of N,N-dimethylacetamide, 0.5g of multi-walled carbon nanotubes, 0.75g of hollow carbon spheres, 1g of silica, and 0.08g of polyvinylpyrrolidone to the container, and use a high-frequency ultrasonic Ultrasonic 20min, power 750W, frequency 20KHz to obtain a uniform mixed solution, wherein the length of multi-wall carbon nanotubes is 20-30μm, the diameter is 5-10nm, the average size of hollow carbon sphere particles is 5-20nm, and the average size of silicon dioxide is 5-20nm. 10 μm; 10 g of 4,4'-diaminodiphenyl ether and 10 g of pyromellitic anhydride were added to the uniform mixed solution in sequence, and magnetically stirred for 30 min to obtain a stable and dispersed composite suspension;

[0053] (2) The substrate is washed with alcohol and acetone...

Embodiment 3

[0057] In the present embodiment, the substrate is selected from an aluminum alloy with a thickness of 2 mm, and the process of preparing the high-temperature resistant light-absorbing coating on the substrate is as follows:

[0058] (1) Add 100mL of N,N-dimethylformamide, 1.5g of multi-walled carbon nanotubes, and 2g of silicon dioxide to the container, and use a high-frequency ultrasonic instrument for high-frequency ultrasonic waves for 10min, power 750W, and frequency 20KHz to obtain a uniform A mixed solution, wherein the multi-walled carbon nanotubes are 20-30 μm in length, 5-10 nm in diameter, and 10 μm in average size of silica; and then add 12 g of 4,4'-diaminodiphenyl ether into the uniform mixed solution in turn , 13g pyromellitic anhydride was magnetically stirred for 30min to obtain a stably dispersed composite suspension;

[0059] (2) The substrate is washed with alcohol and acetone for several times to remove oil stains, and then the surface of the substrate is ...

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Abstract

The invention discloses a preparation method of a high-temperature-resistant light absorption coating. The preparation method comprises the following steps: (1) dispersing a nano carbon material, a surface modifier, a matting material, aromatic diamine and aromatic dianhydride in an organic solvent to prepare a composite suspension; (2) carrying out surface roughening treatment after the substrate is cleaned; and (3) depositing the composite suspension liquid obtained in the step (1) on the substrate treated in the step (2) in an aerial fog spraying or brushing manner, and heating and curing to obtain the high-temperature-resistant light absorption coating. According to the invention, by adjusting the types and proportions of the components in the composite suspension and combining with adaptive spraying process parameters, the components in the suspension can have a synergistic effect, so that the coating has a micro-nano porous structure and also has good mechanical properties. The high-temperature-resistant light absorption coating prepared by the method is good in binding force with a substrate and excellent in light absorption performance, and has a wide application prospect in the fields of optics, navigation and the like.

Description

technical field [0001] The invention relates to the technical field of light-absorbing materials, in particular to a high-temperature resistant light-absorbing coating and a preparation method thereof. Background technique [0002] Light-absorbing materials or light-absorbing coatings are extremely important for improving the sensitivity of aerospace optical instruments. We often think of space as dark, but it's actually incredibly bright, with reflected light from the Earth and the moon, and other stars appear quite dim by comparison. In the case of a star, the light emitted by the non-target star will irradiate the interior of the lens barrel. Due to the certain reflectivity of the surface, the light may enter the detector after multiple reflections, causing interference to the imaging of the target star. Therefore, high-sensitivity optical lens barrels and other parts need to be coated with light-absorbing paints with high absorptivity and low reflectivity to absorb stra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D7/61C09D5/32
CPCC09D179/08C09D7/61C09D5/32C09D5/18C08K2201/011C08K3/041C08K3/045C08K3/36C08K7/24
Inventor 黄晶凤晓华吴双杰淡焱鑫周平张波涛陈秀勇李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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