Preparation method of high-absorption high-emissivity ultra-black molecular adsorption coating

A technology with high emissivity and molecular adsorption, applied in the direction of radiation-absorbing coatings, coatings, chemical instruments and methods, etc., can solve the problems of inflexible installation position, large size, and insufficient absorption area.

Active Publication Date: 2021-04-20
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the problems of existing molecular pollution adsorbers using zeolite molecular sieves as functional materials, such as large weight, large size, inflexible

Method used

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  • Preparation method of high-absorption high-emissivity ultra-black molecular adsorption coating
  • Preparation method of high-absorption high-emissivity ultra-black molecular adsorption coating
  • Preparation method of high-absorption high-emissivity ultra-black molecular adsorption coating

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specific Embodiment approach 1

[0043] (1) Carbon black with a particle size of 30-50 nm is acidified. The specific operation process is as follows: add 80mL of 97% concentrated sulfuric acid and 40mL of 67% concentrated nitric acid to carbon black, magnetically stir at 70°C for condensing and reflux for 3 hours, wash with deionized water until the pH is about 7, and dry it for later use.

[0044] Acid treatment can dissociate oxygen-containing groups on the surface of carbon black, such as -COOH groups dissociate into -COO-, thereby increasing the potential of the electric double layer and increasing the electrostatic repulsion. Surrounded by volume, it plays a certain role of steric hindrance. At the same time, the surface of the acidified carbon black powder will become fluffy, which can increase the diffuse reflection and scattering effect of the optical fiber on the surface, thereby improving its light absorption performance.

[0045](2) Heat and dry 13X-type zeolite molecular sieve powder with micropo...

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Abstract

The invention discloses a preparation method of a high-absorption high-emissivity ultra-black molecular adsorption coating, belonging to the technical field of ultra-black materials. The invention aims to overcome the problems that an existing molecular pollution adsorber with a zeolite molecular sieve as a functional material is large in weight and size, inflexible in installation position and not wide enough in absorption area. According to the preparation method, carbon black and zeolite powder with large specific surface areas are taken as cores, functional powder prepared by an atomic layer deposition technology and taking an ultrathin oxide film layer as a shell is taken as filler, the filler is mixed with a low-volatility resin material, and then coating and curing are conducted so as to obtain the molecular adsorption coating. The average solar absorptivity of the coating is 95%, the hemispherical emissivity of the coating is 91%, a surface layer has the performance of eliminating stray light, and the adsorption capacity of the coating to organic gases (VOCs) such as phthalate, organosiloxane and n-butene is larger than or equal to 17.58 mg/g. The coating has excellent space environment adaptability and can meet the application requirements of spacecrafts and satellite imaging systems.

Description

technical field [0001] The invention relates to a preparation method of an ultra-black molecular adsorption coating with high absorption and high emissivity, and belongs to the technical field of ultra-black materials. Background technique [0002] With the development of spacecraft and satellite imaging systems in the direction of high performance, high reliability, and long life, stringent requirements are placed on the accuracy and sensitivity of payloads. When a spacecraft operates in a high-vacuum environment, small organic molecule pollutants released by materials such as adhesives and plasticizers used will condense and deposit on the surfaces of sensitive components, especially sensitive optical components, affecting their full function or even lead to failure. Therefore, the prevention and control of molecular contamination in orbit has received great attention, and it is urgent to take corresponding measures and measures to reduce its impact on sensitive component...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C09D5/32C09D179/04C09D7/62C23C16/455C23C16/40B05D7/16
Inventor 李杨卢松涛洪杨吴晓宏秦伟
Owner HARBIN INST OF TECH
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