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Preparation method of graphene fibers

A graphene fiber, graphene technology, applied in the chemical characteristics of fibers, textiles and papermaking, chemical post-processing of rayon, etc., 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: 2014-08-06
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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Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Preparation of graphene oxide solution using an improved oxidation exfoliated graphite method:

[0035] 10g graphite, 98% sulfuric acid 150ml, nitric acid 30ml, add to a 500ml Erlenmeyer flask and stir at room temperature for 24h, slowly pour into 1L water and filter to collect the solid, wash 3 times, and dry at 80℃ for 4 hours. Repeat the pre-oxidation process twice. Put the dried pre-oxidized graphite into a box furnace and thermally expand at 900°C for 20 seconds to obtain thermally expanded graphite oxide. Combine 5g of thermally expanded graphite oxide and 300ml of sulfuric acid in a 500ml wide-mouth Erlenmeyer flask, 5g K 2 S 2 O 8 , 7g phosphorus pentoxide mixed and heated at 80°C for 4 hours, diluted with 2L water, filtered and washed, dried in air for 3 days to obtain pre-oxidized thermally expanded graphite. Mix the dry pre-oxidized thermally expanded graphite with 200ml sulfuric acid at a low temperature of 0-5°C, add 20g potassium permanganate, add slowly...

Embodiment 2

[0042] Repeat Example 1, except for the following differences, other conditions are the same: the pure graphene oxide solution and the water-soluble reducing agent hydroiodic acid (HI) are mixed to prepare a 2mg / ml graphene oxide mixed solution. The 8mm diameter PP plastic pipe is sealed, 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 that of Example 1, and the 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: the pure graphene oxide solution and the water-soluble reducing agent NaHSO 3 The 8mg / ml graphene oxide mixed solution prepared by mixing is put into a 2.5mm diameter PP plastic tube, where the mass ratio of graphene oxide to water-soluble reducing agent is 1:300; the sealed plastic tube is placed at 70°C Heat for 3h under conditions.

[0046] The result of the photograph of the obtained graphene fiber is similar to that of Example 1, and the 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 method for preparing graphene fibers. Background technique [0002] As the most basic structural unit of all carbon materials, graphene has a true single atomic layer thickness and a strict two-dimensional structure, and has high mechanical strength, elasticity, thermal conductivity, electrical conductivity, and quantum Hall effect. Since the British scientists Andrejeim and Kostiano Voseno won the Nobel Prize in 2010 for their discovery of graphene, graphene research has reached an unprecedented research climax, and more and more studies have found that it is in energy storage. The special fields of, electrical devices, catalysis and biomedicine have huge application prospects. [0003] From the perspective of practical applications, it is undoubtedly a very valuable research direction to transform nano-graphene materials into macrostructure materials. There have been a large number of studies aimed at the research and preparatio...

Claims

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Application Information

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Patent Type & Authority Applications(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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