Preparation method of electric graphene composite fiber

A graphene composite, graphene sheet technology, applied in fiber chemical characteristics, spinning solution preparation, conductive/antistatic filament manufacturing and other directions, can solve problems such as phase difference

Inactive Publication Date: 2014-01-29
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of the obtained graphene fiber is about 100-200 MPa, which is still far from the strength of graphene monoli

Method used

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  • Preparation method of electric graphene composite fiber
  • Preparation method of electric graphene composite fiber
  • Preparation method of electric graphene composite fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Such as Figures 1 to 3 As shown, a graphene composite fiber provided by an embodiment of the present invention includes a graphene sheet and a polymer that polymerizes the graphene sheet together, wherein the graphene sheet and the polymer form a tightly stacked layered structure, And the graphene sheets are regularly arranged along the fiber axis, wherein the polymer is one or both of hyperbranched polymer and polyvinyl alcohol. The above-mentioned graphene composite fibers are black fibers with a diameter of 5-5000 μm.

[0013] Especially as figure 2 As shown, the graphene sheets inside the fiber are all arranged along the fiber axis and have a high degree of regularity; especially by image 3 As shown, the graphene sheets form a close-packed layered structure with the added polymer, which lays the foundation for its high strength.

[0014] The hyperbranched polymer includes one or more of hyperbranched polyester, hyperbranched polyamide and hyperbranched polygly...

Embodiment 2

[0017] An embodiment of the present invention provides a method for preparing an electric graphene composite fiber, comprising:

[0018] Step 1, adding 1 weight part of graphene oxide, 50-2000 weight parts of solvent, and 0.1-100 weight parts of polymer into the reactor, and stirring to obtain a nanocomposite spinning slurry of polymer and graphene, wherein The polymer includes one or both of hyperbranched polymers and polyvinyl alcohol;

[0019] Step 2, passing the spinning slurry through a spinning nozzle with a diameter of 5-5000 μm at an extrusion speed of 1-100 mL / h, and staying in a rotating coagulant for 1-3600 seconds to solidify into filaments;

[0020] Step 3: After washing and vacuum-drying the product solidified into silk, it is then reduced to obtain a graphene composite fiber.

[0021] The diameter of the electric graphene composite fiber is 5-5000 μm.

[0022] The hyperbranched polymer includes one or more of hyperbranched polyester, hyperbranched polyamide an...

specific Embodiment approach

[0027] 1. In another embodiment of the present invention, the above steps can be specifically:

[0028] In the above step 1, 1 weight part of graphene oxide, 50-2000 weight parts of solvent, 0.1-100 weight parts of polymer polymer are added to the reactor, and the nanocomposite material of polymer and graphene is obtained after stirring. The silk slurry specifically includes: adding 20mg graphene oxide, 1g of N-methyl-2-pyrrolidone solvent and 2g of hyperbranched polyester to the reactor, and stirring for 1 hour to obtain a nanocomposite material of hyperbranched polyester and graphene spinning slurry;

[0029] In the above step 2, passing the spinning slurry through a spinning nozzle with a diameter of 5-5000 μm at an extrusion speed of 1-100 mL / h, staying in a rotating coagulant for 1-3600 s to solidify into filaments specifically includes: The nanocomposite spinning slurry of hyperbranched polyester and graphene is passed through a spinning nozzle with a diameter of 5000 μ...

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Abstract

The embodiment of the invention provides a graphene composite fiber. The graphene composite fiber comprises graphene sheets and a polymer for polymerizing the graphene sheets together, wherein the polymer comprises one or both of hyperbranched polymer and polyvinyl alcohol, the graphene sheets and the polymer form a mutually piled stratified structure and the graphene sheets are regularly arranged along the axial direction of the graphene composite fiber. In the preparation method of the graphene composite fiber, graphene oxide is used as a raw material, so that the tensile strength of the graphene composite fiber is improved greatly; due to the addition of the polymer, the composite fiber can achieve better flexibility; because a rotary coagulator is used in the spinning process, the drawing force of the gel fiber is increased, so that the gel fiber has high orientation and regularity, and the strength of the obtained solid fiber is improved greatly; the conductivity of graphene is restored well in the final reduction process.

Description

technical field [0001] The invention relates to a composite fiber material, in particular to an electric graphene composite fiber and a preparation method thereof. Background technique [0002] Carbon fiber is a new material with excellent performance. It not only has the inherent intrinsic characteristics of carbon materials, but also has the softness and processability of textile fibers. Compared with traditional glass fiber, Young's modulus is more than 3 times; compared with Kevlar fiber (KF-49), not only Young's modulus is about 2 times, but also corrosion resistance and tensile strength Remarkable properties such as strength. Therefore, carbon fiber is widely used in civil, military, construction, chemical, industrial, aerospace and supercar fields. [0003] Graphene is a layer of two-dimensional carbon atoms connected by sp2 hybridization. It has many excellent properties such as ultra-high strength, large specific surface area, high thermal conductivity and carrier...

Claims

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Application Information

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IPC IPC(8): D01F9/12D01F8/18D01F1/09D01F11/16D01F11/14D01F11/12
CPCB82Y30/00B82Y40/00D01D1/02D01D5/06D01D5/14D01F1/09D01F6/50D01F6/90D01F6/92D01F9/12D01F11/04D01F11/16Y10T428/2927
Inventor 高超胡晓珍周晓松徐焰
Owner HUAWEI TECH CO LTD
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