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Preparation method of graphene coating polyacrylonitrile fiber composite material

A technology of ene-coated polyacrylonitrile fibers and polyacrylonitrile fibers, which is applied in the field of preparation of graphene-based composite materials, to achieve the effects of reducing catalyst loss, simple process, and low cost

Active Publication Date: 2012-08-01
SHENGQUAN HEALTANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There have been many studies on graphene composites, but most of them only focus on the preparation and performance of granular composites

Method used

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  • Preparation method of graphene coating polyacrylonitrile fiber composite material
  • Preparation method of graphene coating polyacrylonitrile fiber composite material
  • Preparation method of graphene coating polyacrylonitrile fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Prepare 14wt% NaOH aqueous solution at room temperature, weigh 200mg of commercially available PAN, place it in 60ml NaOH aqueous solution, keep it warm at 110°C for 30min, wash PAN with deionized water until neutral, and dry at 70°C for 12h to obtain Alkali treatment of PAN.

[0034] (2) Prepare 100 mL of 1 mg / mL KH550 solution at room temperature, in which the solvent is a mixture of water and absolute ethanol with a volume ratio of 1:2, soak the alkali-treated PAN in KH550 solution for 12 hours, and dry at 70 ° C for 12 hours to obtain a single layer KH550 modified PAN;

[0035] (3) Prepare a 1 mg / mL GO dispersion at room temperature, place KH550 modified PAN in the GO dispersion, keep warm at 70°C for 3h, and dry at 60°C for 10h to obtain a single-layer GO-modified PAN;

[0036] (4) Repeat steps (2), (3) 3 times to obtain 4 layers of GO modified PAN;

[0037] (5) Put 4 layers of GO modified PAN in a single-necked flask, add 60 mL of 1 mg / mL GO dispersion, and ...

Embodiment 2

[0043] (1) Prepare 10wt% NaOH aqueous solution at room temperature, weigh 60mg of commercially available PAN, place it in 60mL NaOH aqueous solution, keep it at 120°C for 15min, wash PAN with deionized water until neutral, and dry at 40°C for 24h, Alkaline treatment of PAN was obtained.

[0044] (2) Prepare 50 mL of 0.5 mg / mL KH550 solution at room temperature, wherein the solvent is a mixture of water and absolute ethanol with a volume ratio of 1:1, soak the alkali-treated PAN in KH550 solution for 16 h, and dry at 80 ° C for 10 h to obtain a single Layer KH550 modified PAN;

[0045] (3) Prepare a 0.5mg / mL GO dispersion at room temperature, place KH550 modified PAN in the GO dispersion, keep warm at 65°C for 5h, and dry at 45°C for 12h to obtain a single-layer GO-modified PAN;

[0046] (4) Repeat steps (2), (3) twice to obtain 3 layers of GO modified PAN;

[0047] (5) Put the 3-layer GO modified PAN in a single-necked flask, add 0.5mg / mL GO dispersion 60mL, and add 0.6mL hy...

Embodiment 3

[0050] (1) Prepare 15wt% NaOH aqueous solution at room temperature, weigh 1200mg of commercially available PAN, place it in 60mL NaOH aqueous solution, keep it at 90°C for 60min, wash PAN with deionized water until neutral, and dry at 80°C for 8h to obtain Alkali treatment of PAN.

[0051] (2) Prepare 200mL of 2mg / mL KH550 solution at room temperature, in which the solvent is a mixture of water and absolute ethanol with a volume ratio of 1:3, soak the alkali-treated PAN in KH550 solution for 16h, and dry at 65°C for 16h to obtain a single layer KH550 modified PAN;

[0052] (3) Prepare a 2 mg / mL GO dispersion at room temperature, place KH550 modified PAN in the GO dispersion, keep warm at 85°C for 1.5h, and dry at 70°C for 5h to obtain a single-layer GO-modified PAN;

[0053] (4) Repeat steps (2), (3) twice to obtain 3 layers of GO modified PAN;

[0054] (5) Put 3 layers of GO modified PAN in a single-necked flask, add 60 mL of 2 mg / mL GO dispersion, and 1.2 mL of hydrazine h...

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Abstract

The invention relates to a preparation method of a graphene coating polyacrylonitrile fiber composite material. The preparation method comprises the following steps of: (1) processing polyacrylonitrile by using alkali; (2) preparing a polyacrylonitrile fiber with modified single layer KH550; (3) preparing a polyacrylonitrile fiber with modified single layer graphite oxide; (4) using the polyacrylonitrile fiber with the modified single layer graphite oxide as a raw material, repeating the step (2) and the step (3), and obtaining the polyacrylonitrile fiber with modified multiplayer graphite oxide; and (5) placing the polyacrylonitrile fiber with the modified multiplayer graphite oxide in a graphite oxide dispersion liquid, then dropwise adding a hydrazine hydrate aqueous solution, carrying out heating reaction, finally cooling, washing and drying to obtain the graphene coating polyacrylonitrile fiber composite material. The preparation method provided by the invention is simple; the graphite of the composite material provided by the invention is good in reduction degree and uniformly coats the surface of the polyacrylonitrile; and compared with a commercial finished product, the composite material has the advantages that the resistivity of a single wire is reduced by six order of magnitudes, and the composite material has the application prospect of conductive fiber preparation.

Description

technical field [0001] The invention belongs to the field of preparation of graphene-based composite materials, in particular to a method for preparing graphene-coated polyacrylonitrile fiber (graphene / PAN) composite materials. Background technique [0002] Graphene is a carbon atom by sp 2 Carbon lattices are tightly arranged to form layered materials similar to honeycomb structures, which have attracted extensive attention from the scientific community in recent years. The electron movement speed of graphene reaches 1 / 300 of the speed of light, that is to say, it far exceeds the movement speed of electrons in general conductors. Many studies expect to achieve the purpose of improving the electrical properties of materials by combining with graphene. In addition, it also has many excellent properties: good thermal conductivity, mechanical properties, chemical stability, large surface area-to-volume ratio, which makes it useful in nanoelectronics, sensors, nanocomposites, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M13/50C01B31/04D06M101/28C01B32/184
Inventor 李耀刚张飞王宏志张青红
Owner SHENGQUAN HEALTANG
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