High-conductivity graphene fiber and preparation method thereof

A technology of graphene fiber and high conductivity, which is applied in the fields of fiber chemical characteristics, wet spinning method, chemical post-treatment of rayon, etc. It can solve problems such as difficulty in meeting application requirements, unsatisfactory conductivity of graphene fiber, etc., and achieve conductivity improvement , easy operation and low cost

Active Publication Date: 2016-05-04
杭州德烯科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conductive properties of graphene fibers reported so far are not ideal, and the c

Method used

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  • High-conductivity graphene fiber and preparation method thereof
  • High-conductivity graphene fiber and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) 1 g of graphene oxide and 50 g of N,N-dimethylacetamide were mixed, and subjected to ultrasonic treatment at 70 KHz for 1 h at 25° C. to obtain a graphene oxide spinning solution.

[0030] (2) Take the graphene oxide spinning solution obtained in step (1), pass it through a spinning head with an inner diameter of 200 μm at an extrusion speed of 10 mL / h, fully solidify in an ethyl acetate coagulation bath at 25 ° C, and then pass through Collect and dry to obtain graphene oxide fibers.

[0031] (3) Place the graphene oxide fiber obtained in step (2) in a 37% hydroiodic acid aqueous solution, reduce it at 90° C. for 24 hours, wash and dry to obtain the primary graphene fiber.

[0032] (4) Treat the primary graphene fibers obtained in step (3) in an argon atmosphere at 1000° C. for 2 hours to obtain high-quality graphene fibers.

[0033] (5) Place the high-quality graphene fiber obtained in step (4) in a quartz tube, and process it in a bromine vapor for 12h to obtain...

Embodiment 2

[0036] (1) 1 g of graphene oxide and 100 g of dimethyl sulfoxide were mixed, and subjected to ultrasonic treatment at 20° C. at 40 KHz for 1 h to obtain a graphene oxide spinning solution.

[0037] (2) Take the graphene oxide spinning solution obtained in step (1), pass through a spinning head with an inner diameter of 80 μm at an extrusion speed of 1 mL / h, and use n-butanol and ethylene glycol at a volume ratio of 1:1 at 25° C. Fully coagulated in the coagulation bath composed to obtain graphene oxide fibers.

[0038] (3) Place the graphene oxide fiber obtained in step (2) in hydrazine hydrate with a mass fraction of 10%, reduce at 90° C. for 12 hours, wash and dry to obtain primary graphene fiber.

[0039] (4) Treat the primary graphene fibers obtained in step (3) at 2000° C. for 1.5 h in an argon atmosphere to obtain high-quality graphene fibers.

[0040] (5) Place the high-quality graphene fiber obtained in step (4) in a quartz tube, and process it in ferric chloride vapo...

Embodiment 3

[0043] (1) 2g of graphene oxide and 20g of N,N-dimethylacetamide were mixed, and subjected to ultrasonic treatment at 30°C at 40KHz for 2h to obtain a graphene oxide spinning solution.

[0044] (2) Get the graphene oxide spinning solution obtained in step (1), pass through a spinneret with an inner diameter of 300 μm at an extrusion speed of 100 mL / h, and stay in an acetone solid bath at 25° C. for 1 min to become a gel fiber, Graphene oxide fibers are obtained.

[0045] (3) Place the graphene oxide fibers obtained in step (2) in a mixed solvent of hydroiodic acid and trifluoroacetic acid, heat to 90° C., reduce for 1 hour, wash and dry to obtain primary graphene fibers.

[0046] (4) Treating the primary graphene fibers obtained in step (3) at 3000° C. for 1 h in an argon atmosphere to obtain high-quality graphene fibers.

[0047] (5) Place the high-quality graphene fiber obtained in step (4) in a quartz tube, and treat it with metal potassium vapor for 1 h under vacuum condi...

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Abstract

The invention discloses a high-conductivity graphene fiber and a preparation method thereof. By the adoption of the wet spinning technology, oxidized graphene spinning liquid with the mass percentage being 1-10% is extruded from a spinning head into a coagulating bath to obtain an oxidized graphene gel fiber, the oxidized graphene gel fiber is collected on a graphite rolling shaft after being fully solidified, the oxidized graphene fiber is obtained, and the oxidized graphene fiber is sequentially subjected to chemical reduction, high-temperature thermal treatment and chemical doping. The prepared graphene fiber has high conductivity, and the conductivity of the prepared graphene fiber is one magnitude order higher than that of a common graphene fiber. The whole process is simple and controllable in technology, and conductivity of the graphene fiber is improved. The obtained graphene fiber has excellent mechanical property and excellent electrical conductivity and thermal conductivity. The high-conductivity graphene fiber can be used for preparing soft solar batteries, supercapacitors and wearable devices and can serve as a light wire to be used in ultra-light wires and cables, and it is hopeful to replace a metal copper wire with the graphene fiber for new-generation power transmission.

Description

technical field [0001] The invention relates to a graphene fiber, in particular to a highly conductive graphene fiber and a preparation method thereof. Background technique [0002] Graphene is a new type of two-dimensional crystal material composed of single carbon atomic layer. Graphene is single carbon atomic layer graphite. It has a series of superior properties beyond imagination. For example, the highest mechanical properties, the modulus is 1.1TPa, the strength is 180GPa; the highest carrier transport rate is as high as 150000cm 2 / Vs, which is 100 times that of single crystal silicon; the highest thermal conductivity is 5000W / mK, which is more than 10 times that of copper; the highest electrical conductivity (10 8 S / m) and ultra-high current load density. Starting from natural graphite, graphene oxide was prepared by oxidation, and the liquid crystal behavior of graphene oxide solution was combined with wet spinning technology to realize the preparation of graphene...

Claims

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Application Information

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IPC IPC(8): D01F9/12D01F11/12D01D5/06
CPCD01D5/06D01F9/12D01F11/121D01F11/127
Inventor 高超刘英军许震
Owner 杭州德烯科技集团有限公司
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