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Dry spinning prepared ultrahigh-flexibility graphene fibers and preparation method thereof

A graphene fiber, dry spinning technology, applied in the directions of dry spinning, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of low flexibility of graphene fibers and cannot meet application requirements, and is conducive to large-scale production. and application, the effect of outstanding fiber flexibility and high elongation

Inactive Publication Date: 2018-07-13
苏州圣菲尔新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene oxide fibers spun by existing wet spinning or electrospinning methods are reduced to obtain graphene fibers, and the flexibility of the graphene fibers is usually low and cannot meet the application requirements.

Method used

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  • Dry spinning prepared ultrahigh-flexibility graphene fibers and preparation method thereof
  • Dry spinning prepared ultrahigh-flexibility graphene fibers and preparation method thereof
  • Dry spinning prepared ultrahigh-flexibility graphene fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The graphene oxide aqueous solution with a concentration of 15 mg / ml was magnetically stirred at a speed of 400 r / min at 40° C. for 4 hours to obtain a graphene oxide spinning solution.

[0046] The above-mentioned spinning solution is filled into a 10ml syringe, the spinning speed is controlled by a flow pump to be 0.5ml / h, the inner diameter of the spinning hole is 0.8mm, the temperature of the spinning tunnel is 250°C, and the flow rate of hot air is 24l / h. min, the prepared dry and dense graphene oxide fiber was wound onto the bobbin at a speed of 1 r / min. The prepared graphene oxide fibers were reduced with hydroiodic acid for 8 hours at 80°C, washed with absolute ethanol and deionized water three times in sequence, and dried at 80°C to obtain graphene fibers.

Embodiment 2

[0048] The graphene oxide ethanol solution with a concentration of 5 mg / ml was magnetically stirred at a speed of 400 r / min at 60°C for 3 hours to obtain a graphene oxide spinning solution.

[0049] Fill the above spinning solution into a 10ml syringe, use a flow pump to control the spinning speed to 1ml / h, the inner diameter of the spinning hole is 1.5mm, the temperature of the spinning shaft is 300°C, and the flow rate of hot air is 12l / min , the prepared dry and dense graphene oxide fiber is wound onto the bobbin at a speed of 2 r / min. The prepared graphene oxide fibers were reduced with hydroiodic acid at 80°C for 12 hours, washed with absolute ethanol and deionized water three times in sequence, and dried at 80°C to obtain graphene fibers.

Embodiment 3

[0051] The graphene oxide methanol solution with a concentration of 10 mg / ml was magnetically stirred at a speed of 600 r / min at 40° C. for 8 hours to obtain a graphene oxide spinning solution.

[0052] The above-mentioned spinning liquid is filled into a 10ml syringe, the spinning speed is controlled by a flow pump to be 3ml / h, the inner diameter of the spinning hole is 2mm, the temperature of the spinning tunnel is 350°C, and the flow rate of the hot air is 9l / min. The prepared dry and dense graphene oxide fibers were wound onto a bobbin at a speed of 3 r / min. Under the protection of argon, the prepared graphene oxide fibers were reduced at 800° C. for 3 hours at a high temperature to obtain graphene fibers.

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Abstract

The invention discloses dry spinning prepared ultrahigh-flexibility graphene fibers and a preparation method thereof. The graphene fibers are prepared by preparing oxidized graphene fibers through anoxide graphene solution according to a dry spinning method, and then reducing the oxidized graphene fibers to obtain the graphene fibers. According to the method, the limitation on the idea that a long-chain type high polymer is the only material for preparing fibers is broken; the nano two-dimensional slice layer type oxizied graphene is utilized for the first time to continuously prepare the oxidized graphene fibers with outstanding flexibility according to the dry spinning method, and moreover, the graphene fibers with outstanding flexibility can also be successfully prepared according to areduction method. Compared with a wet spinning method, the method has the advantages that the preparation processes are simple and convenient, and the flexibility of the fibers is outstanding; large-scale production and application can be easily carried out; the graphene fibers are mainly applicable to flexible electrodes, supercapacitors and intelligent wearable equipment.

Description

technical field [0001] The invention relates to an ultrahigh flexible graphene fiber and a preparation method thereof, belonging to the field of functional material science. Background technique [0002] Graphene, which is composed of a single layer of carbon atoms, has been a hot spot of attention and research in the material field since its discovery. Graphene is currently the thinnest and highest-strength material in the world. It has excellent mechanical, thermal, electrical and optical properties, and has broad application prospects. Macroscopic graphene fibers are composed of nano-scale graphene sheets, which have excellent electrical conductivity and super strong fracture strength, and have broad application prospects in electrical conduction, supercapacitors, super batteries, and energy storage. Graphene's special large π-bond conjugated electronic structure leads to a large van der Waals force between the layers, and it is easy to reunite and stack between the laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01D5/04
CPCD01D5/04D01F9/12
Inventor 张兆发陈宇岳张德锁林红
Owner 苏州圣菲尔新材料科技有限公司
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