Method for controllably preparing three-dimensional graphene carbon nano-tube composite material

A technology of carbon nanotubes and composite materials, which is applied in the field of controllable synthesis of three-dimensional graphene/carbon nanotube composite materials, can solve the problems of unmentioned pressure influence, large number of layers, and low graphene porosity, etc. Realize the effects of controllable preparation, high degree of crystallization and easy operation

Inactive Publication Date: 2019-02-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the international patent application with application number 62 / 260,127, the preparation of 3D graphene was only carried out at 1120MPa, resulting in less porosity and more layers of graphene, and no mention was made of the influence of pressure on 3D graphene

Method used

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  • Method for controllably preparing three-dimensional graphene carbon nano-tube composite material
  • Method for controllably preparing three-dimensional graphene carbon nano-tube composite material
  • Method for controllably preparing three-dimensional graphene carbon nano-tube composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 3g of nickel powder and 0.4g of sucrose into 150mL of distilled water, and at the same time, ultrasonically treat the multi-walled carbon nanotubes and the surfactant at a ratio of 1:1 to obtain a carbon nanotube dispersion, and then add the mixed solution of nickel powder and sucrose In the process, the beaker was placed on a flat heating table, mechanically stirred at 90°C until evaporated to dryness, then placed in a vacuum oven at 80°C, dried for 12 hours, and then ground into powder. Place the powder in a quartz boat, shake it to make the powder flat, and then 2 Under the atmosphere, the temperature was raised to 1000°C at a heating rate of 10°C / min, and then kept at a temperature of 30 minutes. Purified with distilled water, and finally dried to obtain a three-dimensional graphene / carbon nanotube composite.

Embodiment 2

[0025] Add 3g of nickel powder and 1g of sucrose into 150mL of distilled water, and at the same time, ultrasonically treat the multi-walled carbon nanotubes and the surfactant in a ratio of 1:2 to obtain a carbon nanotube dispersion, and then add the mixed solution of nickel powder and sucrose , put the beaker on a flat heating table, mechanically stir at 80°C until it evaporates to dryness, then put it in a vacuum oven at 100°C, dry it for 12h, and then grind it into powder. The prefabricated powder was compacted using a pressure of 500MPa, the bulk material was placed in a quartz boat, and then heated under 10sccmAr and 500sccmH 2 Under the atmosphere, the temperature was raised to 600°C at a heating rate of 10°C / min, and then kept for 2 hours, and then the quartz boat was quickly pulled out to the low temperature area for rapid cooling, and then it was etched until the color of the etching solution no longer changed, and then used Purified with distilled water, and finally ...

Embodiment 3

[0027] Add 3g of nickel powder and 3g of sucrose into 150mL of distilled water, while ultrasonically treating the multi-walled carbon nanotubes and the surfactant at a ratio of 1:4 to obtain a carbon nanotube dispersion, and then add the mixed solution of nickel powder and sucrose , put the beaker on a flat heating platform, mechanically stir at 50°C until it evaporates to dryness, then put it into a vacuum oven at 50°C, dry it for 12h, and then grind it into powder. The prefabricated powder was compacted using a pressure of 1120MPa, the bulk material was placed in a quartz boat, and then heated under 200sccmAr and 10sccmH 2 Under the atmosphere, the temperature was raised to 800°C at a heating rate of 10°C / min, and then kept at a temperature of 5 hours. Purified with distilled water, and finally dried to obtain a three-dimensional graphene / carbon nanotube composite.

[0028] Compared with CN106629668A and CN106185879A, self-supporting three-dimensional graphene / carbon nanotube...

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Abstract

The invention relates to a method for controllably preparing a three-dimensional graphene carbon nano-tube composite material. The method comprises the following steps: performing ultrasonic treatmenton a carbon nano-tube and surfactant to obtain a carbon nano-tube dispersant; dissolving and mixing a carbon-containing organic matter with metal or metal alloy powder in a solvent, adding the carbonnano-tube dispersant, performing mechanical stirring, heating and mixing, evaporating the solvent, and preparing preformed powder through the processes of vacuum drying and grinding; and simultaneously performing graphene growth and powder sintering by directly using the preformed powder or a bulk material formed by cold-pressing at low pressure or normal pressure in the presence of hydrogen andargon mixed atmosphere at the temperature of 600-1000 DEG C for 0.5-5 hours to obtain the three-dimensional graphene metal composite material.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method for controllably synthesizing a three-dimensional graphene / carbon nanotube composite material. Background technique [0002] With the continuous development of modern science and technology, people have higher and higher requirements for materials used in the fields of structure, energy and catalysis. Carbon nanomaterials have attracted extensive attention from researchers due to their excellent mechanical and electrical properties. Among carbon nanomaterials, graphene is composed of sp 2 A monoatomic layer crystal with a hexagonal honeycomb lattice structure densely packed with hybridized carbon atoms has the characteristics of high electrical conductivity, high specific capacitance, high theoretical strength, and excellent thermal conductivity; carbon nanotubes can be regarded as graphene sheets The one-dimensional material, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/168B82Y30/00
CPCB82Y30/00C01B32/168C01B32/184
Inventor 赵乃勤唐宇沙军威马丽颖师春生
Owner TIANJIN UNIV
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