Graphene oxide solution for wet spinning and preparation method thereof, graphene fiber and preparation method of graphene fiber

A graphene solution and graphene fiber technology, applied in spinning solution preparation, wet spinning method, inorganic raw material rayon, etc., can solve the problem that the steps of wet spinning graphene oxide solution are cumbersome and difficult to realize large-scale production and technology. Complexity and other problems, to achieve the effect of controllable concentration, easy size adjustment and good water solubility

Active Publication Date: 2015-11-25
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

However, the graphene oxide solution for wet spinning prepared by this preparation method has cumbersome steps, complicated process and high cost, so it is difficult to realize large-scale production

Method used

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  • Graphene oxide solution for wet spinning and preparation method thereof, graphene fiber and preparation method of graphene fiber
  • Graphene oxide solution for wet spinning and preparation method thereof, graphene fiber and preparation method of graphene fiber
  • Graphene oxide solution for wet spinning and preparation method thereof, graphene fiber and preparation method of graphene fiber

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[0038] The invention provides a kind of preparation method of graphene oxide solution for wet spinning, comprising the following steps:

[0039] The graphene oxide solution is centrifugally concentrated to obtain a graphene oxide solution for wet spinning.

[0040] The present invention uses the graphene oxide solution as a raw material, and the graphene oxide solution for wet spinning can be obtained through centrifugal concentration.

[0041] In the present invention, the graphene oxide solution is preferably prepared by a modified Hummers method. The modified Hummers method is

[0042] A) dissolving graphite and nitrate in concentrated sulfuric acid and mixing and stirring, adding potassium permanganate, stirring and standing to obtain an intermediate reaction solution;

[0043] B) adding deionized water and hydrogen peroxide to the intermediate reaction liquid for reaction, followed by centrifugal washing to obtain a graphene oxide solution.

[0044] In the present inve...

Embodiment 1

[0064] Dissolve 5g of graphite and 3.75g of sodium nitrate in 160ml of 98% sulfuric acid solution, mechanically stir at 200 rpm for 30min, slowly add 20g of potassium permanganate gradually, the addition time is about 40min, continue to stir for 20h, stand still for 7 days, slowly add 300ml Deionized water and 20ml hydrogen peroxide (added while stirring), repeated centrifugation and water washing (10000 rpm, 10min) until a brown layer of graphene oxide appeared (this process kept the total volume of the solution constant), poured off the supernatant and collected In the middle brown graphene oxide layer (without bright crystal particles), the bottom layer was precipitated and combined and continued to be centrifuged and washed 3 times to obtain an undialyzed graphene oxide solution, which was further centrifuged and concentrated (14000 rpm, 30min, poured out The supernatant and the low-viscosity upper layer of small pieces of graphene oxide solution are taken out of the lower ...

Embodiment 2

[0068] Dissolve 5g of graphite and 4g of potassium nitrate in 180ml of 98% sulfuric acid solution, mechanically stir at 200rpm for 25min, slowly add 20g of potassium permanganate gradually for about 40min, continue stirring for 20h, stand still for 5 days, slowly add 400ml to Ionized water and 30ml hydrogen peroxide (adding while stirring), repeated centrifugation and water washing (8000 rpm, 10min) until a brown layer of graphene oxide appeared (this process kept the total volume of the solution unchanged), poured off the supernatant and pipetted to collect the middle Brown graphene oxide layer (no bright crystal-colored particles), the bottom layer was precipitated and combined and continued to be centrifuged and washed 3 times, and then a non-dialyzed graphene oxide solution was initially obtained, which was further concentrated by centrifugation (14000 rpm, 30min, and poured out) Clear liquid and low-viscosity upper layer of graphene oxide solution, take out the lower layer...

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Abstract

The invention provides a preparation method of a graphene oxide solution for wet spinning; the preparation method includes the following steps: carrying out centrifugal concentration on a graphene oxide solution, to obtain the graphene oxide solution for wet spinning. The graphene oxide solution is subjected to centrifugal concentration so as to obtain the graphene oxide solution for wet spinning finally. The preparation method of the graphene oxide solution for wet spinning simplifies operation processes, and omits ultrasound, dialysis and pre-expansion processes and the like; the experimental preparation process is simple, the conditions are easy to control, and large-scale production can be realized. In addition, the graphene oxide solution used for wet spinning and prepared by the preparation method provided by the invention has the advantages of stable quality, good water solubility, controllable concentration, and easy adjustment of the size of obtained graphene fiber.

Description

technical field [0001] The invention belongs to the technical field of graphene oxide, and in particular relates to a graphene oxide solution for wet spinning and a preparation method thereof, a graphene fiber and a preparation method thereof. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. It has the thinnest thickness, the hardest hardness, and the highest conductivity in the world. It is a two-dimensional carbon atom crystal with a honeycomb structure. It has excellent electrical properties, thermal properties, mechanical properties, and special quantum Hall effect and quantum tunneling effect, etc., and is expected to be widely used in sensors, nanocomposites, batteries, supercapacitors and other materials. application value and application prospects. [0003] With the development of science and technology, micro-nano devices with wearable, weavable, flexible, bendable, and stretchable properties, su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01D5/06D01D1/02
Inventor 俞书宏马涛从怀萍杨颖
Owner UNIV OF SCI & TECH OF CHINA
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