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Preparation method of graphene fiber

A technology of graphene fiber and graphene gel, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, rayon chemical post-treatment, etc., can solve the problems of complex graphene fiber processing technology, long production cycle and high equipment requirements, and achieve Ease of industrial production, low equipment requirements, and simple preparation methods

Active Publication Date: 2013-11-13
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the processing technology for preparing graphene fibers by these methods is complex, the production cycle is long, and the requirements for equipment are high. Therefore, a simpler method for preparing multifunctional graphene fibers has become a research hotspot.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 300 mg of graphite oxide, add 10 g of distilled water, ultrasonicate for 2 h, add 1 g of sodium deoxycholate, stir magnetically at a speed of 600 rpm for 24 h, and prepare sodium deoxycholate / graphene oxide gel. Use a syringe pump to extrude the gel into a watch glass containing absolute ethanol at a speed of 1 mL / min, and replace the absolute ethanol 10 times in time. After washing for 3 hours, suck out the absolute ethanol until it evaporates completely, and obtain the oxidized gel after 2 hours. Graphene fibers. The prepared graphene oxide fibers were added with hydroiodic acid for reduction for 3 h to obtain graphene fibers. Wash 5 times with ultrapure water, let it stand for 6 hours to obtain hydrated graphene fibers, and dry again for 2 hours to obtain graphene fibers.

[0025] The electrical conductivity of the graphene fiber measured by the four-probe method is 500 S / m. like figure 1 In order to obtain macroscopic graphene fibers with high aspect ratio...

Embodiment 2

[0027] Weigh 100 mg of graphite oxide, add 10 g of distilled water, ultrasonicate for 1 h, add 4 g of sodium deoxycholate, stir magnetically at a speed of 300 rpm for 20 h, and prepare sodium deoxycholate / graphene oxide gel. Use a syringe pump to extrude the gel into a watch glass containing absolute ethanol at a speed of 0.6mL / min, and replace the absolute ethanol 8 times in time. After washing for 4 hours, suck out the absolute ethanol and wait for its evaporation to be obtained after 1 hour. Graphene oxide fibers. The prepared graphene oxide fibers were added with hydroiodic acid for reduction for 2 h to obtain graphene fibers. Wash 3 times with ultrapure water, let it stand for 4 hours to obtain graphene fibers containing water, and dry again for 1 hour to obtain graphene fibers. The electrical conductivity of the graphene fiber measured by the four-probe method is 200 S / m.

Embodiment 3

[0029] Weigh 400 mg of graphite oxide, add 10 g of distilled water, ultrasonicate for 1.5 h, add 1 g of sodium deoxycholate, stir magnetically at a speed of 500 rpm for 22 h, and prepare sodium deoxycholate / graphene oxide gel. Use a syringe pump to extrude the gel into a watch glass containing absolute ethanol at a speed of 0.8mL / min, and replace the absolute ethanol 5 times in time. After washing for 3.5 hours, suck out the absolute ethanol and wait for its evaporation to complete. Afterwards, graphene oxide fibers are obtained. The prepared graphene oxide fibers were added with hydroiodic acid for reduction for 2.5 h to obtain graphene fibers. Wash 4 times with ultrapure water, let stand for 5 hours to obtain graphene fibers containing water, and dry again for 1.5 hours to obtain graphene fibers. The electrical conductivity of the graphene fiber measured by the four-probe method is 400 S / m.

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Abstract

The invention relates to a preparation method of a graphene fiber. The preparation method comprises following steps: dispersing oxidized graphite in ultra-pure water at a room temperature, then subjecting the solution to an ultrasonic treatment to obtain oxidized graphene dispersion, adding sodium deoxycholate in the dispersion, stirring to obtain sodium deoxycholate / oxidized graphene hydrogel; wherein the mass ratio of oxidized graphite to sodium deoxycholate to ultra-pure water is 0.1-0.4:1-4:4-10; injecting the sodium deoxycholate / oxidized graphene hydrogel in absolute ethanol to wash by a injector, then removing the absolute ethanol, naturally drying the absolute ethanol to obtain oxidized graphene fiber, then adding hydroiodic acid to have reactions for 2 to 3 hours, washing, drying so as to obtain the graphene fiber. The preparation method has the advantages of simple technology and easy application to industrial production, the prepared graphene fiber has good conductivity and high flexibility, and has vast application prospects in the fields of energy storage devices, photovoltaic devices and sensors.

Description

technical field [0001] The invention belongs to the field of preparation of graphene materials, in particular to a preparation method of graphene fibers. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial. Since graphene was prepared by the research team of Novoselov and Geim at the University of Manchester in 2004, graphene has rapidly become an important material in physics, chemistry and materials due to its high mechanical strength, elasticity, thermal conductivity and extraordinary electron mobility due to its special single-layer structure. It is a hot topic in science, which has set off an upsurge of researchers studying its properties and applications. [0003] In order to make full use of the excellent properties of graphene, it is of great practical application value to prepare graphene into macroscopic materials. Assembling graphene into thin films and block structures can be applied to functional materials such as superca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01F11/12
Inventor 李耀刚黄国集邵元龙侯成义王宏志张青红
Owner DONGHUA UNIV
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