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Preparation method of wide-spectrum-antireflection-structure carbon aerogel

A carbon aerogel and anti-reflection technology, which is applied in the field of carbon aerogel preparation, can solve the problems of high precision requirements for carbon nanotube array preparation, limited sample size, poor processability, etc., and achieves excellent broad-spectrum anti-reflection and light absorption Features, easy control, light weight, broad spectrum, anti-reflection and light absorption properties

Inactive Publication Date: 2016-06-08
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although carbon nanotube arrays can achieve more than 99% absorption of ultraviolet, visible light, near-infrared and far-infrared light, the preparation of carbon nanotube arrays requires high precision, limited sample size, and poor processability. These shortcomings also exist in its application. a lot of restrictions

Method used

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  • Preparation method of wide-spectrum-antireflection-structure carbon aerogel
  • Preparation method of wide-spectrum-antireflection-structure carbon aerogel
  • Preparation method of wide-spectrum-antireflection-structure carbon aerogel

Examples

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Effect test

Embodiment 1

[0034]Step 1. Dissolve 0.647g resorcinol in 50mL deionized water, stir until the solution is clear, add 0.871mL formaldehyde solution, stir for 20min, then add 0.147mL sodium carbonate solution, stir for 20min, then add 20mL deionized water, Obtain reaction solution, under stirring condition, add 30mL modified chitosan copper complex solution dropwise in reaction solution, continue to stir 30min, obtain mixed solution; The density 1.066g / mL of described formaldehyde solution, formaldehyde mass percent is 38%; The amount concentration of the substance of described sodium carbonate solution is 0.2mol / L;

[0035] Step 2, sealing the mixed solution, and placing it in an incubator at 80°C for 30 days to obtain a wet gel;

[0036] Step 3, placing the obtained wet gel in a trifluoroacetic acid (3vol.%) / acetone (97vol.%) solution for acidification and aging for 7 days;

[0037] Step 4, place the wet gel after the acidification and aging treatment in a container with fresh acetone for...

Embodiment 2

[0042] Step 1. Dissolve 1.941g resorcinol in 50mL deionized water, stir until the solution is clear, add 2.614mL formaldehyde solution, stir for 20min, then add 0.441mL sodium carbonate solution, stir for 20min, then add 20mL deionized water, Obtain reaction solution, under stirring condition, add 30mL modified chitosan copper complex solution dropwise in reaction solution, continue to stir 30min, obtain mixed solution; The density 1.066g / mL of described formaldehyde solution, formaldehyde mass percent is 38%; The molar concentration of the substance of the sodium carbonate solution is 0.2mol / L; The preparation method of the modified chitosan copper complex solution adopts the method described in Example 1;

[0043] Step 2, sealing the mixed solution, and placing it in an incubator at 80°C for 30 days to obtain a wet gel;

[0044] Step 3, placing the obtained wet gel in a trifluoroacetic acid (3vol.%) / acetone (97vol.%) solution for acidification and aging for 7 days;

[0045]...

Embodiment 3

[0049] Step 1. Dissolve 2.588g resorcinol in 50mL deionized water, stir until the solution is clear, add 3.485mL formaldehyde solution, stir for 20min, then add 0.588mL sodium carbonate solution, stir for 20min, then add 20mL deionized water, Obtain reaction solution, under stirring condition, add 30mL modified chitosan copper complex solution dropwise in reaction solution, continue to stir 30min, obtain mixed solution; The density 1.066g / mL of described formaldehyde solution, formaldehyde mass percent is 38%; The molar concentration of the substance of the sodium carbonate solution is 0.2mol / L; The preparation method of the modified chitosan copper complex solution adopts the method described in Example 1;

[0050] Step 2, sealing the mixed solution, and placing it in an incubator at 80°C for 30 days to obtain a wet gel;

[0051] Step 3, placing the obtained wet gel in a trifluoroacetic acid (3vol.%) / acetone (97vol.%) solution for acidification and aging for 7 days;

[0052]...

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Abstract

The invention discloses a preparation method of a wide-spectrum-antireflection-structure carbon aerogel. According to the method, the total mass percent of the resorcinol and formaldehyde and the resorcinol / sodium carbonate mass ratio are regulated, and the gelation time, the heating rate in the carbonization process and the sintering temperature are controlled, thereby obtaining the wide-spectrum-antireflection-structure carbon aerogel. The density range of the carbon aerogel prepared by the method is 20-60 mg / cm<3>, the specific area range is 1783-967 m<2> / g, the light reflectivity within the 400-2000nm ultraviolet-visible-near-infrared band is respectively lower than 0.3%, and the absorbance is respectively greater than 99.7%. The carbon aerogel can be used as a novel super black material, and is applicable to the fields of aerospace detecting sensors, solar photo-thermal converters, national defense stealth technology and the like.

Description

technical field [0001] The invention belongs to the field of preparation of porous carbon materials, and in particular relates to a preparation method of carbon airgel with a wide-spectrum anti-reflection structure. Background technique [0002] An ideal black material can absorb all the light irradiated on its surface like a "black hole" without transmission and reflection. Although the ideal state cannot be achieved in reality, since Kirchhoff expounded the concept of black body and Planck created the law of black body radiation Since then, ultra-black materials have attracted more and more attention for their importance to scientific research in different fields. Ultra-black materials can effectively reduce adverse reflections and absorb stray light to a maximum extent, thereby achieving efficient absorption of light. This feature makes ultra-black materials widely used in stray light suppression devices, aerospace detection sensors, solar photothermal conversion Devices...

Claims

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Application Information

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IPC IPC(8): C01B31/02
CPCC01P2004/03C01P2006/10C01P2006/12C01P2006/60
Inventor 朱家艺赵海波付志兵杨曦袁磊米睿张厚琼王朝阳吴卫东张林
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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