Preparation method for high strength macro graphene conductive fiber

A conductive fiber, graphene technology, applied in the chemical characteristics of fibers, textiles and papermaking, chemical post-processing of rayon, etc., can solve the problems such as the failure of macroscopic graphene fibers to achieve, achieve good strength and toughness, excellent electrical conductivity, The effect of a wide range of raw materials

Active Publication Date: 2012-07-04
杭州德烯科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, the preparation of graphene and graphene composite materials has become a hot spot in material science, but the preparation of macroscopic graphene fibers from graphene or graphene oxide has not yet been realized.

Method used

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  • Preparation method for high strength macro graphene conductive fiber
  • Preparation method for high strength macro graphene conductive fiber

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preparation example Construction

[0019] The preparation method of high-strength macro graphene conductive fiber of the present invention comprises the following steps:

[0020] 1. Mix 1 part by weight of graphite raw material, 1-100 parts by weight of sulfuric acid, 0.5-5 parts by weight of potassium persulfate and 0.5-5 parts by weight of phosphorus pentoxide, and stir and react at 25-100 °C for 1-10 hours. After cooling to room temperature, dilute with deionized water, filter with filter membrane, wash with deionized water until neutral, and dry naturally for 10-50 hours to obtain intercalated graphite.

[0021] Graphite is natural graphite or pyrolytic graphite, and sulfuric acid is sulfuric acid with a mass concentration greater than 80%.

[0022] 2. Mix 1 part by weight of the intercalated graphite obtained in step 1, 1~100 parts by weight of sulfuric acid and 0.5~10 parts by weight of potassium permanganate, stir and react at -10~50°C for 0.1~10 hours, then add 10 ~2000 parts by weight of deionized wat...

Embodiment 1

[0035] Step (a): Add 10g of graphite, 10g of 90% sulfuric acid, 1g of potassium persulfate and 1g of phosphorus pentoxide into the reaction flask, stir and react at 80°C for 5 hours, cool to room temperature, and rinse with deionized water Dilute, filter with filter membrane, wash the filter cake repeatedly with deionized water until neutral, dry naturally for 10 hours to obtain intercalated graphite;

[0036] Step (b): Add 5g of the intercalated graphite product obtained in step (a), 20g of 80% sulfuric acid and 2.5g of potassium permanganate to the reaction bottle, stir and react at 50°C for 2 hours, then add 1kg of deionized Water and 0.5g of 30% hydrogen peroxide were stirred for 10 hours, filtered through a filter membrane, and the filter cake was repeatedly washed with deionized water to neutrality, and dried naturally to obtain preliminary graphite oxide;

[0037] Step (c): Add 2g of the preliminary graphite oxide product obtained in step (b), 20g of 90% sulfuric acid, ...

Embodiment 2

[0043] Step (a): Add 10g of graphite, 100g of 90% sulfuric acid, 50g of potassium persulfate and 50g of phosphorus pentoxide into the reaction flask, stir and react at 80°C for 5 hours, cool to room temperature, and use deionized Dilute with water, filter with filter membrane, wash the filter cake repeatedly with deionized water until neutral, dry naturally for 10 hours to obtain intercalated graphite;

[0044] Step (b): Add 5g of the intercalated graphite product obtained in step (a), 300g of 90% sulfuric acid and 50g of potassium permanganate into the reaction bottle, stir and react at 50°C for 2 hours, then add 1kg of deionized water Stir with 30% hydrogen peroxide of 30g for 10 hours, filter with filter membrane, wash the filter cake repeatedly with deionized water to neutrality, and dry naturally to obtain preliminary graphite oxide;

[0045] Step (c): Add 2g of the preliminary graphite oxide product obtained in step (b), 300g of 90% sulfuric acid, 20g of potassium perman...

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Abstract

The invention discloses a preparation method for high strength macro graphene conductive fiber. According to the method, graphite is oxidized to obtain a graphene oxide; the graphene oxide is dispersed in water or a polar organic solvent to prepare a spinning liquid sol with the mass concentration of 1-20%; the spinning liquid sol is transferred to a spinning device; the spinning liquid is continuously extruded from a spinning head capillary at a uniform speed; the extruded spinning liquid enters a solidification liquid; the solidified primary fiber is collected by using a polytetrafluoroethylene roller; a drying treatment is performed to obtain the graphene oxide fiber; the graphene oxide fiber is subjected to chemical reduction to obtain the graphene fiber. According to the present invention, the spinning process is simple; the operation is performed at the room temperature; no strong corrosive reagent is used; the process has the characteristics of green environmental protection; the prepared graphene fiber has characteristics of good conductivity, excellent mechanical property and good toughness, can be woven into the pure graphene fiber cloth, can further be woven into various fabrics with other fibers, and can further be added to the polymer as the conduction enhancing additive and the like; the prepared graphene fiber can replace the carbon fiber to use in a plurality of fields.

Description

technical field [0001] The invention relates to a graphene fiber, in particular to a preparation method of a high-strength macroscopic graphene conductive fiber. Background technique [0002] Graphene is a new type of two-dimensional carbon allotrope, which has attracted widespread attention since its discovery in 2004 (Science, 2004, 306 , 666-669). This material has the highest strength known (Science, 2008, 321 , 385-388), excellent electrical and thermal conductivity. Using natural graphite as raw material, the mass production of graphene can be realized by chemical oxidation-reduction method (Tung, V. C., et al. Nature Nanotechnol., 2009, 4 , 25–29). The graphene prepared in this way is cheap, and the chemically functionalized graphene precursor, that is, graphene oxide has abundant chemical functional groups, which is conducive to further chemical modification. By chemical reduction or thermal reduction of graphene oxide, the structure of graphene and its good pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01F11/12D01F11/14
Inventor 高超许震
Owner 杭州德烯科技集团有限公司
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