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A kind of ultra-long graphene fiber and preparation method thereof

A graphene fiber and graphene technology, applied in fiber chemical characteristics, rayon manufacturing, textiles and paper making, etc., can solve problems such as long production cycle, graphene fiber length and performance limitations, complex graphene fiber processing technology, etc.

Active Publication Date: 2021-05-25
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods for preparing graphene fibers have complex processing techniques, long production cycles, and high requirements for equipment, and at the same time, the length and performance of graphene fibers are limited.

Method used

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  • A kind of ultra-long graphene fiber and preparation method thereof
  • A kind of ultra-long graphene fiber and preparation method thereof
  • A kind of ultra-long graphene fiber and preparation method thereof

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[0031] The preparation method of the ultra-long graphene fiber of the present invention has the advantages of simple process, mild conditions, strong controllability and easy industrial production. The graphene fiber prepared by the method of the invention has uniform structure and excellent performance. The preparation method of ultra-long graphene fiber provided by the present invention is exemplarily described below, such as figure 1 shown.

[0032] Preparation of graphene slurry. The invention utilizes an ultrasonic process to uniformly disperse graphene in absolute ethanol, and obtains graphene slurry that can be used to prepare fibers by adjusting the ratio of graphene to a solvent, a dispersant, and a binder. Wherein, the graphene is dispersed in the solvent, and the mass ratio of the graphene to the solvent may be 1:5˜1:200. The solvent can be absolute ethanol, water, acetone, etc. The mass ratio of the dispersant to graphene may be 1:0.1˜1:10. The dispersant can ...

Embodiment 1

[0041] A kind of preparation method of ultra-long graphene fiber, concrete steps are:

[0042] (1) Use ethylene glycol butyl ether as a dispersant, respectively control the mass ratio of graphene to ethylene glycol butyl ether to 3:1, and the mass ratio of graphene to absolute ethanol to 1:5, and use ultrasonic technology to homogenize the graphene Disperse in absolute ethanol to obtain a graphene suspension, the ultrasonic power is 100W, and the ultrasonic time is 1h;

[0043] (2) Using polyvinyl butyral and dibutyl phthalate as binders, adding graphene suspension, and ultrasonically dispersing to obtain graphene slurry that can be used to prepare fibers. Wherein polyvinyl butyral and dibutyl phthalate mass ratio are 1:2, graphene and binding agent mass ratio are 3:1, be 25wt% to control graphene massfraction, ultrasonic power is 100W, The time is 1h;

[0044] (3) Load the graphene slurry into the extrusion device, use the syringe to squeeze the graphene slurry out of the n...

Embodiment 2

[0047] The difference between this embodiment and embodiment 1 is: in the step (3) of the preparation step, the air pressure of the syringe is controlled to be 0.35 MPa. An ultra-long graphene fiber (100cm in length) with a complete and clear structure, self-supporting, and controllable diameter was obtained, with a tensile strength of 0.5MPa. The test results are as follows image 3 As shown, the diameter is about 400 μm, and the scanning electron microscope (SEM) picture is as follows Figure 5 shown.

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Abstract

The present invention relates to an ultra-long graphene fiber and a preparation method thereof. The ultra-long graphene fiber has a graphene sheet structure preferentially oriented along the fiber axis. The length of the ultra-long graphene fiber is at least 50 cm, preferably The diameter is between 10 and 1000 μm, preferably between 100 and 1000 μm.

Description

technical field [0001] The invention relates to an ultra-long graphene fiber and a preparation method thereof, belonging to the technical field of graphene. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial. The special two-dimensional honeycomb crystal structure endows it with excellent electrical / thermal conductivity, ultra-high specific surface area and excellent mechanical properties. Since its discovery in 2004, graphene has attracted the attention of more and more researchers and has been widely used in supercapacitors, sensors, lithium-ion batteries, composite materials and many other fields. [0003] In the application process, graphene is prone to agglomeration, which leads to its inability to fully apply its performance. Therefore, preparing graphene into macroscopic materials has great practical application value. The main forms of macroscopic graphene are: one-dimensional graphene fiber, two-dimensional graphene paper, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/12D01F1/10
CPCD01F1/10D01F9/12
Inventor 杨金山董绍明黄凯丁玉生王震何平高乐周海军
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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