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Low-gassing-rate antistatic optical absorption coating and preparation method thereof

A technology of optical absorption and outgassing rate, applied in coatings, conductive coatings, chemical industry, etc., can solve the problems of optical system signal intensity reduction, optical system performance attenuation, coating outgassing pollution control, etc. Pollution of sensitive devices, good antistatic performance, and the effect of expanding usage scenarios

Active Publication Date: 2021-11-02
西安应用光学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the space optical load system and the low-temperature infrared system have more stringent requirements for the control of coating outgas pollution. Pollutants will reduce the signal strength of the optical system and the signal-to-noise ratio. Reduce system reliability and service life, therefore, generally require coating CVCM<0.01%
The existing commercial coatings represented by Z306, E51, etc. are difficult to achieve better control of condensable volatile pollution, resulting in attenuation of optical system performance by more than 10%, and some even exceed 30%.

Method used

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  • Low-gassing-rate antistatic optical absorption coating and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation process of a low outgassing rate antistatic optical absorption coating is as follows:

[0036] S1: Preparation of primer dispersion:

[0037] Graphene oxide microflakes with an average diameter of 10 μm were uniformly dispersed in the organic solvent tetrahydrofuran for ultrasonic treatment, and then a certain amount of cage-type silsesquioxane with amino groups as side groups was added and stirred at room temperature to obtain graphene oxide / times Silsesquioxane dispersion, wherein the weight ratio of graphene oxide to silsesquioxane is 70:30. The concentration of the dispersion was 1 mg / ml.

[0038] S2: Preparation of primer:

[0039] The dispersion liquid prepared in step S1 was evenly deposited on the clean surface of the aluminum base, and a primer was obtained through proper amount of volatilization at room temperature, and the volatilization time was 6 hours.

[0040] S3: Preparation of topcoat suspension:

[0041] The hydroxylated carbon nano...

Embodiment 2

[0049] A low outgassing rate antistatic optical absorption coating, the preparation process of which is as follows:

[0050] S1: Preparation of primer dispersion:

[0051] Graphene oxide microchips with an average diameter of 10 μm are uniformly dispersed in the organic solvent tetrahydrofuran for ultrasonic treatment, and then a certain amount of cage-type silsesquioxane with amino groups as side groups is added and stirred at room temperature to obtain graphene oxide / sesquioxane Siloxane dispersion, wherein the weight ratio of graphene oxide to silsesquioxane is 95:5. The concentration of the dispersion was 1 mg / ml.

[0052] S2: Preparation of primer:

[0053] The dispersion liquid prepared in step S1 was evenly deposited on the clean surface of the aluminum base, and a primer was obtained through proper amount of volatilization at room temperature, and the volatilization time was 6 hours.

[0054] S3: Preparation of topcoat suspension:

[0055] The hydroxylated carbon nan...

Embodiment 3

[0063] A low outgassing rate antistatic optical absorption coating, the preparation process of which is as follows:

[0064] S1: Preparation of primer dispersion:

[0065] Graphene oxide microchips with an average diameter of 10 μm are uniformly dispersed in the organic solvent tetrahydrofuran for ultrasonic treatment, and then a certain amount of cage-type silsesquioxane with amino groups as side groups is added and stirred at room temperature to obtain graphene oxide / sesquioxane Siloxane dispersion, wherein the weight ratio of graphene oxide to silsesquioxane is 90:10. The concentration of the dispersion was 1 mg / ml.

[0066] S2: the preparation of primer:

[0067] The dispersion liquid prepared in step S1 was evenly deposited on the clean surface of the aluminum base, and a primer was obtained through proper amount of volatilization at room temperature, and the volatilization time was 6 hours.

[0068] S3: Preparation of surface coating suspension:

[0069] The hydroxyl...

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Abstract

The invention belongs to the technical field of optical absorption coatings, and discloses a preparation method of a low-gassing-rate antistatic optical absorption coating, which sequentially comprises the following steps: preparing a prime coat dispersion liquid, preparing a prime coat, preparing a topcoat suspension liquid, preparing a topcoat, and carrying out coating heat treatment. According to the invention, a non-polymer reaction system taking a carbon material as a main material is adopted, so that the method has the characteristics of no decomposer, no generation of free small molecules and the like, and eliminates air outlet pollution from coating material components; hydrophilic functional groups in the carbon material are sealed by high-hydrophobicity siloxane, so that the adsorption capacity of the coating on environmental gases such as water vapor is greatly reduced; meanwhile, the coating has good antistatic performance and can meet the application requirements of specific space environments.

Description

technical field [0001] The invention belongs to the technical field of optical absorption coatings, and relates to an antistatic optical absorption coating with low outgassing rate and a preparation method thereof. Background technique [0002] Optical absorbing coatings are functional coatings widely used in space payload systems, and play an important role in stray light suppression, thermal radiation control, black body calibration and other fields. These coatings are mainly made of non-metallic materials such as polymers. When in a space vacuum environment, due to the decrease in external air pressure, the concentration balance inside and outside the coating is broken, and some substances inside and on the surface of the coating will diffuse, evaporate, These escaped small molecules are further condensed or deposited on the surface of sensitive devices such as optical lenses, thermal radiation materials, and thermal control materials in the space load system, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/24C09D183/08C09D183/06
CPCC09D5/24C09D183/08C09D183/06C08K2201/001C08K2201/017C08K3/042C08K3/041Y02P20/10
Inventor 俞兵王啸袁林光郭朝龙范纪红史浩飞李燕朴明星秦艳
Owner 西安应用光学研究所
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