Preparation method for graphene fiber

A graphene fiber, graphene solution technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of rough structure of graphene fiber, complicated preparation process, low breaking strength, etc., to achieve uniform appearance and internal structure, and simple operation process. , the effect of low cost

Inactive Publication Date: 2012-07-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects that the graphene fiber prepared by the existing method has rough structure, low breaking strength and complex preparation process, the object of the present invention is to provide a preparation method of graphene fiber, the method has simple operation process and low raw material cost; The graphene fiber prepared by the method of the present invention has a uniform structure, excellent mechanical properties and easy functionalization

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  • Preparation method for graphene fiber
  • Preparation method for graphene fiber
  • Preparation method for graphene fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Prepare 8 mg·mL by Hummers method (Xuejun Xie, etc. ACS Nano 4, 6050-6054 (2010)) -1 Graphene oxide solution.

[0032] (2) Inject the graphene oxide solution prepared in step (1) into a glass capillary with a diameter of 0.4 mm, and seal both ends.

[0033] (3) Heat the sealed glass capillary at 230° C. for 2 h to form water-containing graphene fibers in the glass capillary. The appearance of hydrated graphene fibers is as figure 1 As shown, the fiber is continuous and uniform in diameter, and its diameter measured under an optical microscope is 150 μm; the hydrated graphene fiber is freeze-dried and cut longitudinally, and the fiber structure under a scanning electron microscope is as follows: figure 2 As shown, it can be seen that there are a large number of pore structures in the fiber, and the pores are uniform. Its section is partially enlarged as image 3 shown by image 3 It can be seen more clearly that the fiber has a large number of pore structures, ...

Embodiment 2

[0037] (1) Prepare 8 mg·mL by Hummers method (Xuejun Xie, etc. ACS Nano 4, 6050-6054 (2010)) -1 Graphene oxide solution

[0038] (2) Inject the graphene oxide solution prepared in step (1) into a glass capillary with a diameter of 0.2 mm, and seal both ends.

[0039] (3) Heat the sealed glass capillary at 230° C. for 2 h to form hydrated graphene fibers in the glass capillary, whose appearance is similar to that of the hydrated graphene fibers obtained in Example 1, that is, the fibers are continuous and uniform in diameter , the diameter measured under an optical microscope is 77 μm, and the scanning electron microscope after freeze-drying shows that there are a large number of pore structures in the fiber, and the pores are uniform. Compared with Example 1, it can be seen that the diameters of the glass capillaries are different, and the diameters of the obtained graphene fibers containing water are also different.

[0040] (4) On the workbench, dry the graphene fiber cont...

Embodiment 3

[0042](1) Prepare 4 mg·mL by Hummers method (Xuejun Xie, etc. ACS Nano 4, 6050-6054 (2010)) -1 Graphene oxide solution.

[0043] (2) Inject the graphene oxide solution prepared in step (1) into a glass capillary with a diameter of 0.4 mm, and seal both ends.

[0044] (3) Heat the sealed glass capillary at 230° C. for 2 h to form water-containing graphene fibers in the glass capillary. The appearance of the fiber shows that the fiber is continuous and has a uniform diameter. The diameter measured under an optical microscope is 105 μm. Scanning electron microscopy after freeze-drying showed that the fibers had a uniform pore structure and were more loose. Compared with Example 1, it can be seen that due to the reduction in the concentration of the graphene oxide solution prepared in step (1), the diameter of the obtained hydrated graphene fibers is also reduced, and the pore structure in the fibers is more loose.

[0045] (4) On the workbench, dry the graphene fiber containing...

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Abstract

The invention discloses a preparation method for a graphene fiber and belongs to the field of graphene fiber preparation. The preparation method comprises the following steps: firstly, preparing 2-20 mg.mL<-1> purified graphene oxide solution by using an oxidation stripping graphite method; secondly, injecting the graphene oxide solution in the first step in a pipeline reactor with the inside diameter of 0.1-10 mm and sealing; thirdly, heating the pipeline reactor at the temperature of 100-300 DEG C for 1-6 hours and reducing and assembling the graphene oxide into a water-containing graphene oxide fiber; and fourthly, drying the water-containing graphene fiber obtained in the third step at the temperature of 20-60 DEG C and dehydrating and contracting the water-containing graphene fiber to obtain dry graphene fiber. The preparation method is simple in operation process and low in raw material cost; and the graphene fiber obtained by the method disclosed by the invention has the advantages of uniform structure, excellent mechanical property and easiness in functionalization.

Description

technical field [0001] The invention relates to a method for preparing graphene fibers, belonging to the field of graphene fiber preparation. Background technique [0002] Graphene (Graphene) crystal composed of a single layer of carbon atoms has high mechanical strength, elasticity, thermal conductivity, and high electron mobility (100,000cm 2 ·V -1 ·s -1 ). Single-layer graphene can be used in field-effect transistors, high-frequency devices, super microprocessors and single-molecule detectors. The three-dimensional structures composed of graphene as the basic unit, such as thin films and bulk materials, may be applied in the fields of functional materials such as controllable gas permeability films, anisotropic ion conductors, supercapacitors, lithium-ion batteries, and energy catalysis. [0003] A major obstacle to the research and application of graphene is the effective assembly of graphene macrostructures. At present, the relatively successful assembly is to obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/19
Inventor 曲良体姜长城董泽琳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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