Preparation method of hydroxylated graphene powder with controllable conductive performance

A technology of hydroxylated graphene and electrical conductivity is applied in the field of preparation of hydroxylated graphene powder, which can solve the problems such as literature reports and the like that have not been disclosed for hydroxylated graphene with controllable conductivity, and achieves excellent solubility, The effect of controlled conductivity and high purity

Inactive Publication Date: 2015-01-28
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the technical field of graphene preparation, there is no published literature report of hydroxylated graphene with controllable conductivity

Method used

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  • Preparation method of hydroxylated graphene powder with controllable conductive performance
  • Preparation method of hydroxylated graphene powder with controllable conductive performance
  • Preparation method of hydroxylated graphene powder with controllable conductive performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 1L of graphene oxide aqueous solution with a concentration of 1.0g / L, sonicate for 30min, add ammonia water, adjust the pH value to 7-8, add 1.0g of hydrazine hydrate, put the solution in an oil bath at 80°C, condense and reflux for 24h, adjust the oil bath When the temperature reaches 70°C, add 0.181g of aminophenylcarbinol and 0.204g of isoamyl nitrite to the solution, reflux for 36 hours, filter the resulting solution to neutrality, freeze-dry for 5 days, and obtain a hydroxyl content of 5% (100 The number of hydroxyl groups on the benzene ring) of hydroxylated graphene powder, its resistivity is as figure 1 Shown in 1.

Embodiment 2

[0029] Take 1L of graphene oxide aqueous solution with a concentration of 1.5g / L, sonicate for 30min, add ammonia water, adjust the pH value to 7-8, add 2.25g of hydrazine hydrate, put the solution in an oil bath at 85°C, condense and reflux for 24h, adjust the oil bath Temperature to 70°C, add 0.90g aminophenylethanol and 0.673g isoamyl nitrite to the solution, condense and reflux for 36 hours, filter the resulting solution to neutrality, freeze-dry for 5 days, and obtain a hydroxyl content of 15% (100 The number of hydroxyl groups on the benzene ring) of hydroxylated graphene powder, its resistivity is as figure 1 Shown in 2.

Embodiment 3

[0031] Take 1L of graphene oxide aqueous solution with a concentration of 2.0g / L, ultrasonicate for 30min, add ammonia water, adjust the pH value to 8-9, add 4.0g of hydrazine hydrate, put the solution in an oil bath at 90°C, condense and reflux for 36h, adjust the oil bath When the temperature reaches 75°C, add 1.810g of aminophenylcarbinol and 0.836g of isoamyl nitrite to the solution, reflux for 24 hours, filter the resulting solution to neutrality, freeze-dry for 6 days, and obtain a hydroxyl content of 25% (100 The number of hydroxyl groups on the benzene ring) of hydroxylated graphene powder, its resistivity is as figure 1 Shown in 3.

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Abstract

The invention discloses a preparation method of hydroxylated graphene powder with a controllable conductive performance. The electrical resistivity of the powder is controlled in a range of 10<-4>ohm.m-10<5>ohm.m. The method comprises the following steps: ultrasonically treating oxidized graphene in distilled water to obtain a uniformly dispersed oxidized graphene aqueous solution; adding hydrazine hydrate and ammonium water, and condensing and refluxing in an oil bath to obtain a turbid liquid of graphene and water; then, adding amino phenyl alcohol and isoamyl nitrite and condensing and refluxing to obtain a hydroxylated graphene aqueous solution; filtering to obtain a neutral solution; and freezing and drying to obtain the hydroxylated graphene powder with the controllable conductive performance. The hydroxylation degree of graphene is controlled by controlling the rate of charge of amino phenyl alcohol and oxidized graphene so as to control the conductivity of the hydroxylated graphene powder. The hydroxylated graphene powder is safe, environmental friendly, is free of inert gas protection and foreign ions, is fluffy and is not agglomerated, is high in degree of purity, is excellent in quality and is good in solubleness.

Description

technical field [0001] The invention relates to a preparation method of hydroxylated graphene powder with controllable conductivity, and belongs to the technical field of graphene preparation. Background technique [0002] As an emerging carbon material, graphene is widely used in new energy materials (lithium-ion battery anode materials, supercapacitors, solar cells, etc.) , photocatalytic materials, and biomaterials have set off an unprecedented research boom. [0003] Among the many preparation methods of graphene (micromechanical exfoliation method, chemical exfoliation method, solvothermal method, SiC surface graphitization method, chemical vapor deposition method, etc.), the redox chemical exfoliation method is characterized by its low cost and easy process control. And highly respected by researchers. [0004] At the same time, due to its large specific surface area and high surface energy, graphene is very easy to agglomerate in solvents and matrices, so its intrin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 杨程耿小颖戴圣龙燕绍九张晓艳
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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