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A kind of preparation method of graphene fiber

A technology of graphene fiber and graphite, which is applied to the chemical characteristics of fibers, textiles and papermaking, chemical post-treatment of rayon, etc. It can solve the problems of complex process and high temperature, and achieve the effect of simple operation, low cost and good mechanical properties

Active Publication Date: 2016-07-06
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of graphene fiber in order to overcome the defects of high temperature and complicated process in the preparation method of graphene fiber in the prior art

Method used

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  • A kind of preparation method of graphene fiber
  • A kind of preparation method of graphene fiber
  • A kind of preparation method of graphene fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Prepare graphene oxide solution by using improved oxidation exfoliated graphite method:

[0035] Add 10g of graphite, 150ml of 98% sulfuric acid, and 30ml of nitric acid into a 500ml Erlenmeyer flask and stir at room temperature for 24 hours, slowly pour it into 1L of water to collect the solid, wash 3 times, and dry at 80°C for 4 hours. Repeat the pre-oxidation process twice. The dried pre-oxidized graphite was put into a box furnace and thermally expanded at 900°C for 20s to obtain thermally expanded graphite oxide. In a 500ml wide-mouth Erlenmeyer flask, mix 5g of heat-expandable graphite oxide with 300ml of sulfuric acid, 5gK 2 S 2 o 8 , 7g of phosphorus pentoxide mixed and heated at 80°C for 4 hours, diluted with 2L of water, filtered and washed, dried in air for 3 days to obtain pre-oxidized thermally expandable graphite. Mix dry pre-oxidized heat-expandable graphite with 200ml of sulfuric acid at a low temperature of 0-5°C, add 20g of potassium permangana...

Embodiment 2

[0042] Repeat Example 1, except for the following differences, other conditions are the same: the 2mg / ml graphene oxide mixed solution prepared by mixing the pure graphene oxide solution with the water-soluble reducing agent hydroiodic acid (HI) is loaded into In a PP plastic tube with a diameter of 8 mm, seal it, and the mass ratio of graphene oxide to water-soluble reducing agent is 1:200.

[0043] The photo of the obtained graphene fiber is similar to Example 1, and its fiber diameter and tensile strength are shown in Table 1.

Embodiment 3

[0045] Repeat Example 1, except for the following differences, other conditions are the same: pure graphene oxide solution and water-soluble reducing agent NaHSO 3 Mix the prepared 8mg / ml graphene oxide mixed solution and put it into a PP plastic tube with a diameter of 2.5mm, wherein the mass ratio of graphene oxide to water-soluble reducing agent is 1:300; put the sealed plastic tube at 70°C Conditions of heating for 3h.

[0046] The photo result of the obtained graphene fiber is similar to Example 1, and its fiber diameter and tensile strength are shown in Table 1.

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Abstract

The invention discloses a preparation method of graphene fibers. The preparation method comprises the following steps: (1), a mixture of a graphene oxide solution and a water-soluble reducing agent is added into a tubular reactor, wherein the water-soluble reducing agent is one or more of ascorbic acid, sodium ascorbate, sodium citrate, HI, HBr, NaHSO3, Na2S, ethylenediamine, p-phenylenediamine and hydroquinone; (2), the tubular reactor in the step (1) is heated, and graphene oxide is reduced and assembled to aqueous graphene gel fibers, and the heating temperature is 60-95 DEG C; and (3), the aqueous graphene gel fibers obtained in the step (2) is dried to obtain the graphene fibers. The preparation method is simple to operate, mild in conditions and low in raw material cost; and the graphene fibers obtained with the preparation method are uniform in structure, excellent in mechanical property and easiness in functionalization.

Description

technical field [0001] The invention relates to a preparation method of graphene fibers. Background technique [0002] As the most basic structural unit of all carbon materials, graphene has a true monoatomic layer thickness and a strict two-dimensional structure, and has high mechanical strength, elasticity, thermal conductivity, electrical conductivity, and quantum Hall effect. Since the discovery of graphene by British scientists Andre Gem and Costiano Voseno in 2010 and won the Nobel Prize, graphene research has reached an unprecedented research climax, and more and more studies have found that its role in energy storage , electrical devices, catalysis and biomedical special fields have great application prospects. [0003] From the perspective of practical application, it is undoubtedly a very valuable research direction to transform nanographene materials into macrostructure materials. There have been a lot of research on the research and preparation of macroscopic g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/12D01F11/16
Inventor 李景烨李吉豪张伯武谢思远李林繁张阔贾娜
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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