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Binary composite structure optical absorbent and preparation method thereof

A technology of optical absorption and binary recombination, which is applied in the field of materials and can solve the problems of affecting the optical absorption effect of the coating and the sudden change of the refractive index.

Active Publication Date: 2021-11-02
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a dense coating structure surface often forms a sudden change in refractive index between the surface and air, resulting in a high reflection between the coating and the air interface, which greatly affects the optical absorption effect of the coating.

Method used

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  • Binary composite structure optical absorbent and preparation method thereof

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Embodiment 1

[0033] The object of the present invention is to provide a kind of preparation method of the binary composite structure light-absorbing agent that has ultra-wide band optical response from visible light to infrared band, it is characterized in that, comprises the following steps:

[0034] 1) Weigh 0.25mmol of ammonium tungstate hydrate, 10mmol of thiourea, and 0.5mmol of sodium dodecylbenzenesulfonate, and dissolve them in 50mL of water, and stir them magnetically for 20min at room temperature until they are completely dissolved;

[0035] 2) Transfer the mixed solution in step 1) to a polytetrafluoroethylene reactor and react at 220°C for 24 hours. After the reaction, cool the reactor to room temperature naturally, collect the black product by centrifugation at 5000rpm, and then use Wash with deionized water and absolute ethanol three times respectively, and dry in an oven at 60°C for 12 hours to obtain tungsten disulfide microspheres with a two-dimensional structure;

[0036]...

Embodiment 2

[0041] 1) Weigh 0.25mmol of ammonium tungstate hydrate, 10mmol of thiourea, and 1mmol of cetyltrimethylammonium bromide, and dissolve them in 50mL of water, and stir them magnetically for 20min at room temperature until they are completely dissolved;

[0042] 2) Transfer the mixed solution in step 1) to a polytetrafluoroethylene reactor and react at 220°C for 24 hours. After the reaction, cool the reactor to room temperature naturally, collect the black product by centrifugation at 5000rpm, and then use Wash with deionized water and absolute ethanol three times respectively, and dry in an oven at 60°C for 12 hours to obtain tungsten disulfide microspheres with a two-dimensional structure;

[0043] 3) Weigh 100 mg of the tungsten disulfide microsphere powder prepared in step 2), and disperse it in a mixed solvent of 350 mL of absolute ethanol and deionized water by means of ultrasonic dispersion, and the volume ratio of absolute ethanol and deionized water is 4 / 1, the time of ...

Embodiment 3

[0048] 1) Weigh 0.25mmol of ammonium molybdate hydrate, 10mmol of thiourea, and 0.5mmol of sodium dodecylbenzenesulfonate, and dissolve them in 50mL of water, and stir them magnetically for 20min at room temperature until they are completely dissolved;

[0049] 2) Transfer the mixed solution in step 1) to a polytetrafluoroethylene reactor and react at 180°C for 12 hours. After the reaction, cool the reactor to room temperature naturally, collect the black product by centrifugation at 5000rpm, and then use Wash with deionized water and absolute ethanol three times respectively, and dry in an oven at 60°C for 12 hours to obtain molybdenum disulfide microspheres with a two-dimensional structure;

[0050] 3) Weigh 100 mg of molybdenum disulfide microsphere powder prepared in step 2), and disperse it in a mixed solvent of 350 mL of absolute ethanol and deionized water by means of ultrasonic dispersion, and the volume ratio of absolute ethanol and deionized water is 4 / 1, the time o...

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Abstract

The invention provides a binary composite optical absorbent and a preparation method thereof. According to the invention, the optical absorbent takes two-dimensional transition metal sulfide microspheres as a core layer material and a graphene wall as a shell layer material, a several-nanometer hollow structure is formed between the two components, the two-dimensional transition metal sulfide based on the nanosheet structure and the graphene wall can provide multiple interface reflection and absorption for incident electromagnetic waves, and through the synergistic effect of the two-dimensional transition metal sulfide and the graphene wall, the reflectivity of the coating can be effectively reduced; and the porosity of the coating can be improved through the hollow structure between the two-dimensional transition metal sulfide microspheres and the graphene walls so as to further reduce the refractive index mutation of the coating and air, and the graphene wall on the surface layer and the two-dimensional transition metal sulfide microspheres inside fully absorb electromagnetic waves entering the hollow pores so as to improve the absorption performance of the coating. The optical absorbent prepared by the invention can be suitable for various adhesive systems, has good universality, and is widely applied to a scene requiring stray light absorption and inhibition of an optical system.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a binary composite structure optical absorber with ultra-wide band optical response from visible light to infrared band. Background technique [0002] Because high-absorbing materials can effectively reduce the adverse reflection of the material surface and absorb the discrete light of the material to a great extent, they have been widely used in important structural components such as optical instrument structural components, solar energy conversion equipment, new thermal detectors, and pyroelectric sensors. . With the continuous improvement of observation accuracy and remote sensing positioning requirements in the optical system, further improving the absorption rate of the absorbing coating can control the suppression level of stray light, reduce non-target light entering the detector, and improve the signal-to-noise ratio and sensitivity ...

Claims

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Application Information

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IPC IPC(8): C09D5/32
CPCC09D5/32Y02E10/40
Inventor 朴明星李朝龙王啸史浩飞
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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