Graphene fiber and preparation method thereof

A graphene fiber and graphene technology, applied in the field of fiber materials, can solve structural conductive defects, limit the conductive properties of graphene fibers, etc., and achieve the effect of reducing resistance and improving conductivity

Active Publication Date: 2014-10-15
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, experimental tests have shown that graphene obtained through the reduction of graphene oxide still has structural conductive defects, which will greatly limit the improvement of the electrical conductivity of graphene fibers.

Method used

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  • Graphene fiber and preparation method thereof
  • Graphene fiber and preparation method thereof
  • Graphene fiber and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Such as figure 1 As shown, the graphene fiber provided in Embodiment 1 of the present invention is a composite fiber in which metal nanowires are doped with graphene fibers. The main components of the composite fiber are graphene and metal nanowires, wherein the mass of metal nanowires is When the ratio is 0.1% to 50%, the graphene is in a sheet state, and the metal nanowires and the graphene sheet are arranged parallel to the axis of the graphene fiber at the same time.

[0014] Scanning electron microscope image of the surface of graphene fiber doped by metal nanowires figure 1 As shown, the metal nanowires in the graphene fiber lead to the arrangement; the scanning electron micrograph of the surface of the graphene fiber doped by metal nanowires figure 2 As shown, the graphene is distributed in sheets and parallel to each other. The spots pointed by the arrows are the end faces of the metal nanowires. It can be seen that the metal nanowires are arranged vertically ...

Embodiment 2

[0024] Embodiment 2 of the present invention provides a method for preparing graphene fibers. The method mainly prepares graphene oxide through an oxidation method, disperses graphene oxide in a solvent to prepare graphene oxide liquid crystals, and adds metal nanowires to graphene oxide. After the graphene oxide-metal nanowire spinning liquid sol is prepared in the liquid crystal, wet spinning is carried out, and the obtained metal nanowire-doped graphene oxide fiber is reduced to obtain the metal nanowire-doped graphene fiber, wherein the specific steps include :

[0025] Step 201, adding metal nanowires with a mass fraction of 0.1 to 50% in the graphene oxide liquid crystal with a mass concentration of 0.3% to 3%, stirring evenly at a stirring speed of 100 to 1000rpm to form graphene oxide-metal nanowire spinning lyosol;

[0026] Step 202: Take the graphene oxide-metal nanowire spinning solution sol obtained in step 201, pass it through a spinning tube with a diameter of 5...

Embodiment 3

[0038] The preparation method of a graphene fiber provided by Embodiment 3 of the present invention is similar to the method of Embodiment 2, the difference is only in the graphene oxide liquid crystal concentration, graphene oxide liquid crystal solvent, metal nano The types of wires, the mass percentage of metal nanowires, and the reduction process are different, and specifically include the following steps:

[0039] Step 301, adding silver nanowires with a mass fraction of 0.5% to the graphene oxide liquid crystal aqueous dispersion with a mass concentration of 0.3%, and stirring at a stirring speed of 100 rpm to form a graphene oxide-silver nanowire spinning liquid sol;

[0040] Step 302, take the graphene oxide-silver nanowire spinning solution sol obtained in step 301, pass it through a spinning tube with a diameter of 30 μm at an extrusion speed of 1 mL / h, and stay in a 5 wt% calcium chloride aqueous solution at 5°C 100s solidified into silk, washed and dried to obtain ...

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Abstract

The invention discloses a graphene fiber and a preparation method thereof, wherein the graphene fiber is a composite fiber obtained by doping graphene fiber with metal nanowires, the composite fiber comprises the main components of graphene and the metal nanowires, wherein the mass ratio of the metal nanowires is 0.1% ~ 50%, the graphene is in lamellar morphology, and the metal nanowires and the graphene layers are parallelly and simultaneously arranged along the axial direction of the graphene fiber. The metal nanowire doped graphene fiber is a new high performance and multifunctional fiber material, by doping of the metal nanowires, fiber conductive rate is greatly improved, meanwhile the graphene fiber exhibits good tensile strength and excellent toughness, has the very strong potential application value in many fields such as use as lightweight flexible wires and the like.

Description

technical field [0001] The invention relates to fiber materials, in particular to a graphene fiber and a preparation method thereof. Background technique [0002] Graphene is a new allotrope of two-dimensional carbon, which has attracted extensive attention since its discovery. Graphene has the highest strength of any known material, while having excellent electrical and thermal conductivity. Therefore, graphene can be used as an ideal assembly unit to prepare high-performance fibers, aerogels, films, and nanocomposites. Among them, graphene fibers are a new type of high-performance multifunctional fiber materials that can be continuous through graphene oxide liquid crystals preparation. In the process of preparing graphene fibers, non-conductive graphene oxide will be converted into conductive graphene through chemical reduction or thermal reduction. However, experimental tests have shown that graphene obtained through the reduction of graphene oxide still has structural...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01F1/10D01F11/12D01F11/14
CPCD01D5/06D10B2401/16D01F9/08C01B31/0484D10B2101/20D01F1/09D01D10/06D01F9/12C01B31/0438D10B2101/12C01B32/182C01B32/194D01F11/10Y10T428/2918
Inventor 周晓松徐焰高超许震
Owner HUAWEI TECH CO LTD
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