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Preparation method of in-situ growth carbon nanotube/graphene composite sponge

A graphene composite and graphene sponge technology, applied in the field of material science, can solve the problems of low density, high modulus, and the internal space of the sponge is not used, and achieve the effect of improving electrical conductivity, improving mechanical properties, and expanding the scope of application

Inactive Publication Date: 2021-06-29
深圳烯创先进材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Carbon nanotubes have excellent comprehensive properties, such as low density, ultra-high strength, high modulus, and high thermal and electrical conductivity. The synergistic effect of carbon nanotubes and graphene can enhance the mechanical and electrical properties of composite sponges. Researchers generally use The mixed solution of carbon nanotubes and graphene is used to prepare carbon nanotube / graphene composite sponge by freeze-drying method. Although the skeleton of the composite sponge is strengthened, the internal space of the sponge is not utilized, and the carbon nanotubes are stacked on each other in the sponge skeleton, which cannot play a role. Its excellent elasticity

Method used

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  • Preparation method of in-situ growth carbon nanotube/graphene composite sponge
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  • Preparation method of in-situ growth carbon nanotube/graphene composite sponge

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Embodiment 1

[0023] The preparation method of the in-situ growth carbon nanotube / graphene composite sponge provided by this embodiment is realized according to the following steps:

[0024] 1. Preparation of oriented graphene sponge: Pour the dispersed graphene oxide aqueous solution with a concentration of 5 mg / ml into a cuboid mold with aluminum at the bottom and polytetrafluoroethylene around it, and place the bottom of the mold at a low temperature cold source -80°C Freeze on the surface, and then use the freeze-drying method to obtain the oriented porous graphene oxide sponge. Finally, the aligned graphene sponge was prepared by heat treatment at 1000 °C for 2 h under nitrogen atmosphere.

[0025] 2. Preparation of graphene sponge loaded with nickel nitrate: immerse the oriented graphene sponge obtained in step 1 in a nickel nitrate ethanol solution with a concentration of 30 mg / ml, and vacuum the oven to a vacuum with a vacuum pump for 30 minutes, so that the solution is filled with ...

Embodiment 2

[0029] The preparation method of the in-situ growth carbon nanotube / graphene composite sponge provided by this embodiment is realized according to the following steps:

[0030] 1. Preparation of oriented graphene sponge: Pour the dispersed graphene oxide aqueous solution with a concentration of 5 mg / ml into a cuboid mold with aluminum at the bottom and polytetrafluoroethylene around it, and place the bottom of the mold at a low temperature cold source -80°C Freeze on the surface, and then use the freeze-drying method to obtain the oriented porous graphene oxide sponge. Finally, chemical reduction was carried out at a temperature of 90° C. for 24 hours using excess hydrazine hydrate to obtain an aligned graphene sponge.

[0031] 2. Preparation of graphene sponge loaded with nickel nitrate: immerse the oriented graphene sponge obtained in step 1 in a nickel nitrate ethanol solution with a concentration of 30 mg / ml, and vacuum the oven to a vacuum with a vacuum pump for 30 minute...

Embodiment 3

[0034] A kind of preparation method of growing carbon nanotube / graphene composite sponge in situ, realize according to the following steps:

[0035] 1. Preparation of oriented graphene sponge: Pour the dispersed graphene oxide aqueous solution with a concentration of 5 mg / ml into a cuboid mold with aluminum at the bottom and polytetrafluoroethylene around it, and place the bottom of the mold at a low temperature cold source -80°C Freeze on the surface, and then use the freeze-drying method to obtain the oriented porous graphene oxide sponge. Finally, the aligned graphene sponge was prepared by heat treatment at 1000 °C for 2 h under nitrogen atmosphere.

[0036] 2. Preparation of graphene sponge loaded with nickel nitrate: immerse the oriented graphene sponge obtained in step 1 in a nickel nitrate ethanol solution with a concentration of 60 mg / ml, and vacuum the oven to a vacuum with a vacuum pump for 30 minutes, so that the solution is filled with graphite After drying in an...

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Abstract

The invention discloses a preparation method of an in-situ growth carbon nanotube / graphene composite sponge. The method comprises the following steps of 1, preparing an oriented graphene sponge, 2, preparing graphene sponge loaded with nickel nitrate, and 3, preparing the carbon nanotube / graphene composite sponge. A chemical vapor deposition method is adopted for in-situ growth of carbon nanotubes in oriented graphene sponge pores, such that the carbon nanotube / graphene composite sponge is obtained. Compared with the prior art, the method for preparing the carbon nanotube / graphene composite sponge has the advantages that the chemical vapor deposition method can regulate and control the morphology of the carbon nanotube by adjusting the nickel nitrate concentration and the vapor deposition time, so that the internal structure of the composite sponge is adjusted, different use requirements are met, and the application range of the composite sponge is expanded. Meanwhile, the in-situ grown carbon nanotubes not only improve the conductivity of the composite sponge, but also improve the mechanical properties of the composite sponge.

Description

technical field [0001] The invention belongs to the field of material science, and relates to a preparation method of a carbon nanotube / graphene composite sponge, in particular to a preparation method of an in-situ grown carbon nanotube / graphene composite sponge. Background technique [0002] Graphene has excellent electrical, optical, mechanical, and thermal properties. Graphene sponge is a three-dimensional macroscopic body constructed by overlapping graphene sheets, bringing the excellent properties of graphene from the nanoscale to the macroscale. The three-dimensional structured graphene sponge has high specific surface area, large porosity, and excellent mechanical and electrical properties, and has a wide range of applications in energy storage, environmental restoration, composite materials, electromagnetic shielding, drive sensing, and other fields. Carbon nanotubes have excellent comprehensive properties, such as low density, ultra-high strength, high modulus, and ...

Claims

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Application Information

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IPC IPC(8): C01B32/16C01B32/184C01B32/194
CPCC01B32/16C01B32/184C01B32/194C01B2202/22C01B2204/22
Inventor 彭庆宇陈仲赫晓东赵旭
Owner 深圳烯创先进材料研究院有限公司
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