A kind of preparation method of graphene airgel that can compress and rebound

A graphene airgel, compression rebound technology, applied in the field of graphene, can solve the problems of graphene airgel with low mechanical properties, large specific surface area, high porosity, etc., to eliminate interfacial inclusions and diffusion, and improve stability Sexuality, high success rate effect

Active Publication Date: 2020-09-29
临沂星火知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Airgel is generally a complete dry skeleton that remains after removing the solvent in the gel. Airgel has the characteristics of low density, high porosity, and large specific surface area. It is widely used in aerospace exploration, wave-absorbing materials, environmental protection, and efficient catalysis. After being prepared in the 1930s, the composition and performance of airgel have been continuously improved and perfected through the efforts of countless scientists. At present, ultra-light porous materials of various materials have been developed. Such as silica aerogel, metal porous material, carbon nanotube aerogel, with the discovery of graphene and carbon nanotube, it has the characteristics of high strength, low density, good elasticity, high conductivity, etc. Rebound airgel new material, the mechanical properties of graphene aerogels are not high at present, improving the mechanical properties of graphene aerogels has become a research hotspot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of a compressible rebound graphene airgel, comprising:

[0022] (1) Preparation of graphene inkjet precursor

[0023] Get graphene and put it into deionized water, and prepare a graphene dispersion liquid with a concentration of 8mg / ml, wherein the graphene sheet diameter is distributed at 300-800nm, and the thickness is 0.7-1.2nm, and it is processed under ultrasonic conditions for 2 hours to obtain a uniform For a stable graphene dispersion, 20uL of EDA auxiliary agent is added to the graphene dispersion to enhance the assembly between graphene sheets, and the graphene inkjet precursor is obtained by ultrasonication at room temperature for 0.5 hours.

[0024] (2) Preparation of carbon nanotube inkjet precursor

[0025] Put carbon nanotubes into deionized water and treat them under ultrasonic conditions for 20 minutes to prepare a carbon nanotube dispersion with a concentration of 8-10mg / ml, add 20uL of EDA auxiliary agent to the carbon nanotube d...

Embodiment 2

[0037] A preparation method of a compressible rebound graphene airgel, comprising:

[0038] (1) Preparation of graphene inkjet precursor

[0039]Get Graphene and put into deionized water, be mixed with the Graphene dispersion liquid of 8.5mg / ml concentration, wherein Graphene sheet diameter is distributed in 300-800nm, and thickness is 0.7-1.2nm, process 3 hours under ultrasonic condition, obtain For a uniform and stable graphene dispersion, 20uL of EDA auxiliary agent is added to the graphene dispersion to enhance the assembly between graphene sheets, and the graphene inkjet precursor is obtained by ultrasonication at room temperature for 0.7 hours.

[0040] (2) Preparation of carbon nanotube inkjet precursor

[0041] Put the carbon nanotubes into deionized water and treat them under ultrasonic conditions for 25 minutes to obtain a carbon nanotube dispersion, which is prepared into a carbon nanotube dispersion with a concentration of 8.5mg / ml, and 20uL of EDA is added to the...

Embodiment 3

[0053] A preparation method of a compressible rebound graphene airgel, comprising:

[0054] (1) Preparation of graphene inkjet precursor

[0055] Get graphene and put it into deionized water, and prepare a graphene dispersion liquid with a concentration of 9mg / ml, wherein the graphene sheet diameter is distributed at 300-800nm, and the thickness is 0.7-1.2nm, and it is processed under ultrasonic conditions for 4 hours to obtain a uniform For a stable graphene dispersion, 20uL of EDA auxiliary agent is added to the graphene dispersion to enhance the assembly between graphene sheets, and the graphene inkjet precursor is obtained by ultrasonication at room temperature for 1 hour.

[0056] (2) Preparation of carbon nanotube inkjet precursor

[0057] Put the carbon nanotubes into deionized water and treat them under ultrasonic conditions for 30 minutes to obtain a carbon nanotube dispersion, which is prepared into a carbon nanotube dispersion with a concentration of 9mg / ml, and 20...

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Abstract

The invention relates to a novel compressively-resilient graphene aerogel preparation method. The method includes: preparing a graphene inkjet precursor, preparing a carbon nanotube inkjet precursor,adopting a 3D printing platform to print three-dimensional graphene blocks, performing hydrothermal reaction to obtain three-dimensional graphene hydrogel, and performing freeze drying to obtain graphene aerogel. By the 3D printing technique, carbon nanotubes are introduced into graphene, the carbon nanotubes and the graphene are in alternate arrangement to effectively avoid curling and accumulation of graphene and carbon nanotube structures in the aerogel, and the success rate of the aerogel is increased; in addition, a structure, formed among graphene layers, of the carbon nanotubes is capable of effectively supporting a graphene interlayer structure, resilience is realized under resilience force of the carbon nanotubes after compression, a great compressive resilience performance of graphene aerogel is achieved, the graphene aerogel is quick in resilience after being compressed to 15-50% of own volume, and damages and collapse are avoided.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation method of a novel compressible and resilient graphene airgel. Background technique [0002] Airgel is generally a complete dry skeleton that remains after removing the solvent in the gel. Airgel has the characteristics of low density, high porosity, and large specific surface area. It is widely used in aerospace exploration, wave-absorbing materials, environmental protection, and efficient catalysis. After being prepared in the 1930s, the composition and performance of airgel have been continuously improved and perfected through the efforts of countless scientists. At present, ultra-light porous materials of various materials have been developed. Such as silica aerogel, metal porous material, carbon nanotube aerogel, with the discovery of graphene and carbon nanotube, it has the characteristics of high strength, low density, good elasticity, high conductivity, etc....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/194C01B32/168B01J13/00B33Y10/00
CPCB01J13/0091B33Y10/00C01B32/168C01B32/194
Inventor 张成如
Owner 临沂星火知识产权服务有限公司
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