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A method and application of large-scale continuous production of three-dimensional graphene film

A graphene film, graphene technology, applied in the direction of titanium dioxide, ferrous oxide, titanium oxide/hydroxide, etc., can solve the problem of limited scale, continuous production, and difficult application and preparation of three-dimensional graphene Harsh conditions and other problems, to achieve the effect of low price, light quality and fast restoration

Active Publication Date: 2016-06-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the harsh conditions of the existing three-dimensional graphene preparation: the process is cumbersome, involves toxic reagents, takes a long time, and the shortcomings of large-scale and continuous production are limited, making it difficult to realize the application of three-dimensional graphene in actual production

Method used

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  • A method and application of large-scale continuous production of three-dimensional graphene film
  • A method and application of large-scale continuous production of three-dimensional graphene film
  • A method and application of large-scale continuous production of three-dimensional graphene film

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Embodiment 1

[0061] 1. Utilize the oxidized exfoliated graphite method (Hummers method) to prepare 10mg / mL graphene oxide solution;

[0062] 2. Heat, stir and concentrate the 10mg / mL graphene oxide solution at 45°C, so that the concentration of the graphene oxide solution is 25mg / mL;

[0063] 3. Immerse a polytetrafluoroethylene tank with a top opening (3cm in diameter) and a square notch on one side of the bottom into a glass tank filled with methanol, and the notch is completely immersed in methanol. The height of the square notch is 0.4cm, and the width is 3cm;

[0064] 4. In the second step, the concentrated 25mg / mL graphene oxide solution is injected from the top of the polytetrafluoroethylene tank, so that the graphene oxide solution is pushed out from the bottom slot at a speed of 0.8m / min and formed in the methanol solution. A continuous ribbon structure of graphene oxide, i.e. graphene oxide ribbons;

[0065] 5. Lead the punched graphene oxide strips from the methanol solution t...

Embodiment 2

[0070] 1. Utilize the oxidized exfoliation graphite method (Hummers method) to prepare 4mg / mL graphene oxide solution;

[0071] 2. Heat, stir and concentrate the 4mg / mL graphene oxide solution at 60°C, so that the concentration of the graphene oxide solution is 15mg / mL;

[0072] 3. Immerse a polytetrafluoroethylene tank with a top opening (3cm in diameter) and a square notch on one side of the bottom into a glass tank filled with methanol, and the notch is completely immersed in methanol. The height of the square notch is 0.3cm, and the width is 2cm;

[0073] 4. In the second step, the concentrated 15mg / mL graphene oxide solution is injected from the top of the polytetrafluoroethylene tank, so that the graphene oxide solution is pushed out from the bottom slot at a speed of 0.8m / min and formed in the methanol solution. A continuous ribbon structure of graphene oxide, i.e. graphene oxide ribbons;

[0074] 5. Lead the graphene oxide strips from the methanol solution to a 60°C,...

Embodiment 3

[0078] 1. Utilize the oxidized exfoliation graphite method (Hummers method) to prepare 8mg / mL graphene oxide solution;

[0079] 2. Heat, stir and concentrate the 8mg / mL graphene oxide solution at 50°C, so that the concentration of the graphene oxide solution is 20mg / mL;

[0080] 3. Immerse the polytetrafluoroethylene tank with an open top (3cm in diameter) and a square notch on one side of the bottom into a glass tank filled with methanol, and the notch is completely immersed in methanol; the height of the square notch is 0.5cm, width 6cm;

[0081] 4. In the second step, the concentrated 20mg / mL graphene oxide solution is injected from the top of the polytetrafluoroethylene tank, so that the graphene oxide solution is pushed out from the bottom slot at a speed of 0.8m / min and formed in the methanol solution. A continuous ribbon structure of graphene oxide, i.e. graphene oxide ribbons;

[0082] 5. Lead the punched graphene oxide strips from the methanol solution to a 50°C, 1....

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Abstract

The invention discloses a method for on-scale continuous production of a three-dimensional graphene membrane and application, belonging to the field of functional materials. The method comprises the following steps: 1, preparing a graphene oxide solution; 2, stirring and concentrating; 3, soaking a polytetrafluoroethylene bath into methanol; 4, filling the concentrated graphene oxide solution into the polytetrafluoroethylene bath, thereby obtaining graphene oxide strips; 5, leading out the graphene oxide strips from the methanol solution, firstly drying, and further performing reduction expansion, thereby obtaining the three-dimensional graphene membrane; and 6, collecting the three-dimensional graphene membrane, and coiling. The graphene oxide solution and functional nanoparticles are mixed, and the functional three-dimensional graphene membrane can be prepared by performing the above preparation steps. The method is simple in preparation process, environment-friendly, low in cost and applicable to on-scale production, and the three-dimensional graphene membrane prepared by using the method is three-dimensional and porous and has the characteristics of light mass, large specific surface area and good flexibility.

Description

technical field [0001] The invention relates to a method and application for large-scale continuous production of three-dimensional graphene membranes, belonging to the field of functional materials. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a planar layered junction in a hexagonal honeycomb lattice. Three-dimensional graphene has become one of the most popular materials for graphene-related materials due to its high specific surface area, excellent electrical conductivity and porous structure; in energy storage and conversion materials (lithium-ion batteries, fuel cells, supercapacitors, etc.), The application of photocatalytic materials and magnetic absorbing materials has attracted extensive attention of researchers at home and abroad. [0003] At present, the methods for preparing three-dimensional graphene are mainly chemical vapor deposition and chemical reduction of graphene oxide followed by freeze-drying. However, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01G49/08C01G23/047C01G3/02B22F3/22B82Y30/00
Inventor 曲良体胡传刚
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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