Carbon-based ultra-black stray light-eliminating nano-composite coating and preparation method thereof

A nano-composite coating, stray light elimination technology, applied in coatings, carbon compounds, chemical instruments and methods, etc., can solve the problems of inability to carry out large-scale production, high cost, high production cost, etc., and achieve stable and controllable quality. , Improve the absorption rate, reduce the effect of stray light interference

Active Publication Date: 2022-05-13
SHANGHAI INST OF SATELLITE EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most outstanding performance is Vantablack developed by Surrey Nanosystems, which is mainly composed of vertically arranged carbon nanotubes, but the production cost is very high
Other commonly used materials also include non-metallic materials such as amorphous carbon and polycrystalline black silicon, and nickel-phosphorus master alloy materials. Most of these methods have the disadvantages of high cost and inability to carry out large-scale production.

Method used

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  • Carbon-based ultra-black stray light-eliminating nano-composite coating and preparation method thereof
  • Carbon-based ultra-black stray light-eliminating nano-composite coating and preparation method thereof
  • Carbon-based ultra-black stray light-eliminating nano-composite coating and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0034] as Figure 1 As shown, the preparation method of carbon-based ultra-black matting light nanocomposite coating, comprising the following steps:

[0035] Step 1, the preparation of carbon aerogel filler: according to the molar ratio of 1: 0.1 ~ 0.3: 0.5 ~ 1, respectively, called chitosan, resorcinol, furfural resin, by the use of sol - gel method to prepare aerogel; the aerogel supercritical drying; the dried aerogel under certain temperature, a certain time conditions for carbonization; and finally the carbonized aerogel is activated to obtain a graded porous carbon aerogel material. Sol gel method refers to: glycan, resorcinol, furfural resin is added to the alcohol aqueous solution to obtain a gel, and the aerogel is reacted in a hydrothermal kettle to obtain an aerogel.

[0036] Step 2, preparation of graphene composite carbon aerogel filler: different proportions of carbon aerogel and graphene powder are mechanically mixed by ball milling, so that it is fully mixed evenl...

Embodiment 1

[0041]The present embodiment relates to a carbon-based ultra-black matting light nanocomposite coating and a preparation method thereof.

[0042] The ultra-black matte nano coating of the present embodiment consists of a silicone resin and graphene composite carbon aerogel filler.

[0043] According to the molar ratio of 1:0.2:0.8, respectively, called chitosan, resorcinol, furfural resin, by the sol- gel method to prepare the aerogel; the aerogel for carbon dioxide supercritical drying, the drying aerogel at 700 °C carbon carbon 2h, and finally the carbonized aerogel for carbon dioxide activation, to obtain a graded porous carbon aerogel material.

[0044] Preparation of graphene composite carbon aerogel filler: The carbon aerogel and graphene powder obtained in the previous step are mechanically mixed according to the ratio of 10:1 mass ratio, and the ball mill is used to make it fully mixed evenly, and the graphene composite carbon aerogel filler is obtained.

[0045] Preparat...

Embodiment 2

[0047] The present embodiment is substantially the same as Example 1, the difference is that:

[0048] In the preparation of graphene composite carbon aerogel filler, the mass ratio of carbon aerogel and graphene used is 10:2.

[0049]Preparation of ultra-black matting nano-composite coating: In the silicone resin, graphene composite carbon aerogel filler powder is added, mixed stirring, ethyl acetate is added, mixed, ultrasonically stirred evenly to obtain carbon-based ultra-black matting nano-coating; wherein, the mass ratio of silicone resin and graphene composite carbon aerogel filler is 7:3, and the ethyl acetate diluent is added according to its amount of graphene composite carbon aerogel filler powder and silicone resin 6 times the total weight. In the process of coating preparation, the surface treatment agent silane coupling agent is first sprayed, cured at room temperature for 1-2h, sprayed to prepare the carbon-based ultra-black matting nano-coating, cured at 55 °C for...

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Abstract

The invention provides a carbon-based ultra-black stray light-eliminating nano composite coating and a preparation method thereof. The preparation method comprises the following steps: (1) preparing aerogel through a sol-gel method; sequentially carrying out supercritical drying, carbonization and activation on the aerogel to obtain a graded porous carbon aerogel material; (2) mechanically mixing the carbon aerogel obtained in the step (1) and graphene to obtain a graphene composite carbon aerogel filler; and (3) adding the graphene composite carbon aerogel filler obtained in the step (2) into a resin binder, mixing and stirring, adding an organic solvent, mixing, ultrasonically stirring uniformly to obtain a carbon-based ultra-black stray light-eliminating nano-coating, then spraying the carbon-based ultra-black stray light-eliminating nano-coating on the surface of a pretreated matrix, and curing to obtain the carbon-based ultra-black stray light-eliminating nano-composite coating. The carbon-based ultra-black stray light eliminating nano-composite coating can reduce stray light interference of an optical load of a spacecraft in a special environment, guarantee the reliability of spacecraft operation and meet the requirement of the optical load for stray light suppression.

Description

Technical field [0001] The present invention relates to the field of nanomaterial preparation technology, in particular, to a carbon-based ultra-black matting light nanocomposite coating and a preparation method thereof. Background [0002] As the Earth observation satellite system is experiencing a leap in performance and function, especially the spatio-temporal resolution and detection accuracy of remote sensing instruments to the development of "high spatial resolution, high temporal resolution, high spectral resolution, high radiation accuracy and global, all-weather, multi-band observation", it has become the development trend of remote sensing detection and puts forward higher requirements for optical systems. Stray light interference is the main factor affecting the high definition and resolution of optical payloads on the star. If the stray light in the optical system cannot be effectively suppressed, the background noise of the detector will be very high, affecting the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/61C01B32/336
CPCC09D183/04C09D7/61C01B32/336C08K7/24C08K3/042
Inventor 韩贺祥曹康丽李瑜婧高冬冬苏京徐骏刘刚
Owner SHANGHAI INST OF SATELLITE EQUIP
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