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Preparation method of large-diameter graphene fiber

A graphene fiber and large-diameter technology, applied in fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of poor performance of graphene fibers, large differences in internal and external structures, weak interaction between single filaments, etc., and achieve low cost and method Simple and fast effect

Pending Publication Date: 2020-11-24
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fibers prepared by large-aperture spinning heads generally have large differences in internal and external structures, and the performance of graphene fibers is poor.
The multifilaments bundled with thinner fibers cannot give full play to the excellent properties of graphene fibers due to the weak interaction between the filaments in the tow

Method used

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  • Preparation method of large-diameter graphene fiber

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Effect test

Embodiment 1

[0024] The preparation method of large-diameter graphene fiber of the present invention specifically comprises the following steps:

[0025] (1) Graphene oxide powder with a size of 5 μm is dissolved in water, stirred at a speed of 600rpm for 12h, and the graphene oxide spinning stock solution is obtained after stirring evenly, so that the concentration of the graphene oxide spinning stock solution is 5mg / ml.

[0026] (2) The graphene oxide spinning stock solution is spun through a spinneret with a spinneret number of 100 and a diameter of 0.15 mm in a solidification bath of methanol solution of sodium hydroxide to obtain 100 as-spun filaments arranged in parallel .

[0027] (3) The as-spun fibers are taken out together from the coagulation bath of methanol solution of sodium hydroxide, and at the liquid-gas interface, the as-spun fibers are bundled together due to surface tension to obtain bundled fibers;

[0028] (4) placing the bundled fibers in an ethanol stretching bat...

Embodiment 2

[0039] The preparation method of large-diameter graphene fiber of the present invention specifically comprises the following steps:

[0040] (1) Graphene oxide powder with a size of 15 μm is dissolved in N,N-dimethylformamide, stirred at a speed of 600rpm for 12h, and the graphene oxide spinning stock solution is obtained after stirring evenly; the graphite oxide The concentration of the vinyl spinning dope was 18mg / ml.

[0041] (2) The graphene oxide spinning stock solution is spun through a spinneret with 50 spinneret holes and a diameter of 0.15 mm in an ethanol solution coagulation bath of potassium hydroxide to obtain 50 as-spun filaments arranged in parallel .

[0042] (3) The as-spun fibers are taken out together from the ethanol solution coagulation bath of potassium hydroxide, and at the liquid-gas interface, the as-spun fibers are bundled together due to surface tension to obtain bundled fibers;

[0043] (4) placing the bundled fibers in a glacial acetic acid stret...

Embodiment 3

[0047] The preparation method of large-diameter graphene fiber of the present invention specifically comprises the following steps:

[0048] (1) Dissolving the graphene oxide powder with a size of 20 μm in tetrahydrofuran, stirring at a speed of 600rpm for 12h, stirring evenly to obtain a graphene oxide spinning stock solution; the concentration of the graphene oxide spinning stock solution is 30mg / ml.

[0049] (2) The graphene oxide spinning stock solution is spun through a spinneret with a spinneret number of 10 and a diameter of 0.15 mm in a sodium hydroxide aqueous solution coagulation bath to obtain 10 as-spun filaments arranged in parallel.

[0050] (3) The as-spun fibers are taken out from the aqueous solution coagulation bath of sodium hydroxide, and at the liquid-gas interface, the as-spun fibers are bundled together due to surface tension to obtain bundled fibers;

[0051] (4) Put the bundled fibers in a stretching bath of a mixture of ethylene glycol and acetone at ...

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Abstract

The invention discloses a preparation method of a large-diameter graphene fiber. The preparation method specifically comprises the following steps of: (1) dissolving graphene oxide powder in a solvent, and uniformly stirring to obtain a graphene oxide spinning solution; (2) spinning the graphene oxide spinning solution in a coagulating bath by using a spinneret plate with more than two spinneret orifices to obtain more than two parallel nascent filaments; (3) extracting all nascent fibers in the coagulating bath from the coagulating bath to obtain a bundled fiber; (4) putting the bundled fiberin a stretching bath for stretching, and finally winding the filaments on a reel to obtain a graphene oxide fiber; and (5) reducing the graphene oxide fiber to obtain the large-diameter graphene fiber. The preparation method is simple and quick, and the adopted solvent is low in cost and environment-friendly. In addition, the large-diameter graphene fiber is uniform in internal and external structures and has excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of fiber preparation, and in particular relates to a method for preparing large-diameter graphene fibers. Background technique [0002] Graphene is a two-dimensional honeycomb material formed by densely packed single-layer carbon atoms. It has excellent mechanical, electrical, optical and thermal properties, making it widely used in new fields such as electronics, aerospace defense, new energy, and new materials. Its application prospects have become a hot spot in scientific and industrial research. Compared with traditional materials, it meets the requirements of future technology for faster, lighter, thinner and stronger materials. Graphene must be assembled into macroscopic materials to achieve practical applications. Graphene macroscopic materials include: one-dimensional graphene fibers, two-dimensional graphene films, and three-dimensional graphene aerogels. Among them, graphene fibers have strong el...

Claims

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Application Information

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IPC IPC(8): D01F9/12
CPCD01F9/12
Inventor 高超卫傅翔汪波
Owner HANGZHOU GAOXI TECH CO LTD