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Self-twisting graphene fiber and preparation method thereof

A graphene fiber and graphene technology, applied in the direction of fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of low flexibility of graphene fiber and cannot meet the application requirements, so as to achieve large-scale production and application, fiber flexibility performance Prominent, large elongation effect

Pending Publication Date: 2018-05-18
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no use of dry spinning to carry out self-twisting at the same time
In addition, the graphene oxide fibers spun by the existing wet spinning or electrospinning methods are reduced to obtain graphene fibers, and the flexibility of the graphene fibers is usually low and cannot meet the application requirements.

Method used

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  • Self-twisting graphene fiber and preparation method thereof
  • Self-twisting graphene fiber and preparation method thereof
  • Self-twisting graphene fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]Fill the graphene oxide spinning solution into the spinner, control the spinning speed with a flow pump to be 0.5ml / h, the inner diameter of the spinning hole is 0.8mm, the temperature of the spinning shaft is 250°C, and the flow rate of the hot air The temperature is 24 l / min, the angle between the hot air flow and the spinning hole is 45°, and the prepared dry and regular self-twisted graphene oxide fiber is wound onto the bobbin at a speed of 1 r / min. The spinning solution was prepared from a graphene oxide aqueous solution with a concentration of 15 mg / ml at 40° C. and magnetically stirred at a speed of 400 r / min for 4 hours.

[0047] The prepared self-twisted graphene oxide fibers were reduced by hydroiodic acid at 100°C for 8 hours, washed with absolute ethanol and deionized water three times in sequence, and dried at 100°C to obtain self-twisted graphene fibers.

Embodiment 2

[0049] Fill the graphene oxide spinning liquid into the spinning container, control the spinning speed with a flow pump to be 1ml / h, the inner diameter of the spinning hole is 1.5mm, the temperature of the spinning shaft is 300°C, and the flow rate of hot air is 12l / min, the angle between the hot air flow and the spinning hole is 30°, and the prepared dry and regular self-twisted graphene oxide fiber is wound onto the bobbin at a speed of 2r / min. The spinning solution was prepared from a graphene oxide ethanol solution with a concentration of 5mg / ml at 60°C and magnetically stirred at a speed of 400r / min for 3h.

[0050] The prepared self-twisted graphene oxide fibers were reduced by hydroiodic acid at 100°C for 12 hours, washed with absolute ethanol and deionized water three times in sequence, and dried at 100°C to obtain self-twisted graphene fibers.

Embodiment 3

[0052] The graphene oxide spinning solution is filled into the spinning container, and the spinning speed is controlled by a flow pump to be 3ml / h, the inner diameter of the spinning hole is 2mm, the temperature of the spinning shaft is 350°C, and the flow rate of the hot air is 9l / h. min, the angle between the hot air flow and the spinning hole is 50°, and the prepared dry and regular self-twisting graphene oxide fiber is wound onto the bobbin at a speed of 3r / min. The spinning solution was prepared from a methanol solution of graphene oxide with a concentration of 10 mg / ml at 40° C. and magnetically stirred at a speed of 600 r / min for 8 hours.

[0053] The prepared graphene oxide fibers were reduced at 800°C for 3 hours under the protection of argon to obtain self-twisted graphene fibers.

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Abstract

The invention discloses a self-twisting graphene fiber and a preparation method thereof. The self-twisting graphene fiber is characterized in that a graphene oxide solution is adopted to prepare a graphene oxide fiber by a dry spinning process, twisting is performed by hot air during spinning to ensure that the graphene oxide fiber has a twist, and then the graphene oxide fiber is reduced to obtain the self-twisting graphene fiber. The preparation method of the self-twisting graphene fiber comprises the following steps: (1) adding a graphene oxide spinning solution into a spinning container, enabling the graphene oxide spinning solution to pass through a spinning hole at a certain rate to be spun in a spinning channel, and drying and twisting the spun graphene oxide spinning solution withair at a certain flow rate to prepare the self-twisting graphene oxide fiber; and (2) performing chemical reduction or physical reduction on the dry and regular self-twisting graphene oxide fiber to prepare the self-twisting graphene fiber. The airflow direction in the step (1) forms an angle of more than 0 degree and less than 90 degrees with the axial direction of the spinning hole.

Description

technical field [0001] The invention relates to a self-twisting graphene fiber preparation technology, in particular to a self-twisting graphene fiber and a preparation method thereof. Background technique [0002] Graphene has excellent mechanical, thermal, electrical and optical properties, and has been a hot topic of concern and research in the scientific and material circles since its discovery. Graphene composed of a single layer of carbon atoms has a large interaction force between the sheets, and it is easy to agglomerate and pile up between the sheets, and it is insoluble in most solvents, which limits the method of directly preparing graphene materials. Macroscopic graphene fibers are composed of nano-scale graphene sheets, which have excellent electrical conductivity and super strong fracture strength, and have broad application prospects in electrical conduction, supercapacitors, super batteries, and energy storage. [0003] As the precursor of graphene, graphene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12
CPCD01F9/12
Inventor 张兆发陈宇岳张德锁林红
Owner SUZHOU UNIV
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