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Ultra-black light absorbing coating as well as preparation method and application thereof

A light-absorbing coating and a technology for absorbing coating, applied in the field of coating materials, can solve the problems of high preparation cost, weakened light-absorbing performance, low production efficiency, etc., and achieve the effect of reducing the difference in the refractive index of the interface and improving the light-absorbing performance

Pending Publication Date: 2022-06-28
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such methods have high preparation costs, low production efficiency, and strict requirements on growth environment and post-maintenance, which cannot meet the requirements of practical applications.
[0004] At present, the light-absorbing coatings that can be mass-produced by spraying on the market all use organic resins as binders to bond light-absorbing materials (such as carbon nanotubes). Existence, carbon nanotubes will be coated on the surface of the coating to form a pure resin film, which increases the difference in refractive index between the light and the surface of the coating, and weakens the light absorption performance

Method used

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  • Ultra-black light absorbing coating as well as preparation method and application thereof
  • Ultra-black light absorbing coating as well as preparation method and application thereof
  • Ultra-black light absorbing coating as well as preparation method and application thereof

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preparation example Construction

[0026] The invention provides a preparation method of an ultra-black light absorbing coating, comprising the following steps:

[0027] (1) Mixing carbon nanotubes, resin, organic additives, absolute ethanol and water to obtain a mixed slurry;

[0028] (2) After the mixed slurry obtained in the step (1) is applied to the substrate, plasma etching is performed to obtain an ultra-black light absorbing coating.

[0029] Unless otherwise specified, the source of each component is not particularly limited in the present invention, and commercially available products well known to those skilled in the art can be used.

[0030] In the present invention, carbon nanotubes, resins, organic additives, absolute ethanol and deionized water are mixed to obtain mixed slurry.

[0031] In the present invention, the carbon nanotubes preferably include single-walled carbon nanotubes or multi-walled carbon nanotubes, more preferably multi-walled carbon nanotubes. In the present invention, the ca...

Embodiment 1

[0067] (1) Add 1.1% mass content of multi-walled carbon nanotubes (length 1.5μm, diameter 9.5nm, Forsman Technology (Beijing) Co., Ltd.), 25.8% deionized water, 13.9% non-ferrous material to the beaker at room temperature Water ethanol, 35% water-based chloroacetate resin (EV, Guangzhou Houhuan Chemical Auxiliary Co., Ltd.), 11% water-based acrylic resin (HR-005, Guangzhou Houhuan Chemical Auxiliary Co., Ltd.) (the total amount of resin is 46%), 13.2% organic additives (including 10% wetting agent HD245, 3% dispersing agent HH2190 and 0.2% defoamer AD20, Guangzhou Houhuan Chemical Auxiliary Co., Ltd., the mass ratio of wetting agent, dispersing agent and defoaming agent is 10:3:0.2), use a grinder to fully mix and grind for 12h at a rate of 1500rpm to obtain a mixed slurry;

[0068] (2) After sanding the aluminum plate with 400-grit sandpaper until the surface is covered with uniform scratches, clean the surface step by step with deionized water and industrial alcohol, spray t...

Embodiment 2

[0071] (1) Add 1.5% mass content of multi-walled carbon nanotubes (length 1.5 μm, diameter 9.5 nm, Forsman Technology (Beijing) Co., Ltd.), 25.8% deionized water, 13.5% no Water ethanol, 35% water-based chloroacetate resin (EV, Guangzhou Houhuan Chemical Auxiliary Co., Ltd.), 11% water-based acrylic resin (HR-005, Guangzhou Houhuan Chemical Auxiliary Co., Ltd.) (the total amount of resin is 46%), 13.2% organic additives (including 10% wetting agent HD245, 3% dispersing agent HH2190 and 0.2% defoamer AD20, Guangzhou Houhuan Chemical Auxiliary Co., Ltd., the mass ratio of wetting agent, dispersing agent and defoaming agent is 10:3:0.2), use an ultrasonic mill to ultrasonically disperse the mixed slurry with a power of 20kHz for 20min;

[0072] (2) After sanding the aluminum plate with 400-grit sandpaper until the surface is covered with uniform scratches, clean the surface step by step with deionized water and industrial alcohol, spray the mixed slurry obtained in step (1) on th...

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Abstract

The invention provides an ultra-black light absorbing coating and a preparation method and application thereof, and belongs to the technical field of coating materials, and the preparation method comprises the following steps: (1) mixing carbon nanotubes, resin, an organic auxiliary agent, absolute ethyl alcohol and water to obtain mixed slurry; and (2) coating a substrate with the mixed slurry obtained in the step (1), and then carrying out plasma etching to obtain the ultra-black light absorbing coating. According to the invention, plasma etching is carried out after the slurry is coated on the substrate, the resin layer on the surface of the coating is etched off, the carbon nanotube filler is exposed, and the original optical contact interface is replaced by the air / carbon nanotube from the air / resin layer, so that the refractive index difference of the interface is effectively reduced, and the light absorption performance of the coating is improved. The average light absorptivity of the prepared ultra-black light absorbing coating is 98.94%, and the maximum light absorptivity of the ultra-black light absorbing coating is 99.04%.

Description

technical field [0001] The invention relates to the technical field of coating materials, in particular to a super black light absorbing coating and a preparation method and application thereof. Background technique [0002] Ultra-black light absorbing coatings can improve the sensitivity of optical instruments, used for astronomical cameras, telescopes and infrared scanning systems, and can also be used for optical components and light baffles, hoods, inner walls of lens barrels, darkrooms and other systems and parts that need to eliminate stray light In order to improve the accuracy of optical devices, it also has broad application prospects in space detection, precision instruments, ultra-dark rooms, and photovoltaic modules. At the same time, ultra-black materials are close to pure black, which brings more possibilities to the field of visual arts. . [0003] In recent years, researchers have prepared a carbon nanotube forest structure with multiple scattering character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/32C09D7/80
CPCC09D5/32C09D7/80
Inventor 马琛林再鸣陈国华
Owner HUAQIAO UNIVERSITY