Preparation method of super-dispersed graphene

A graphene and ultra-dispersion technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of research reports and cannot be used directly, and achieve good dispersion, conductivity retention, and avoid damage.

Inactive Publication Date: 2019-12-13
姚丹旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For users who purchase graphene, graphene will inevitably reunite during storage and transportation, so it cannot be used directly
Moreover, there is no detailed research report on how the ultrasonic treatment process affects the structure and dispersion of graphene.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix graphene and water at a mass ratio of 1:10, add polystyrene sulfonate with 2% graphene mass, and disperse ultrasonically for 20 minutes at an ultrasonic frequency of 45 kHz to obtain a graphene dispersion. After the dispersion liquid is frozen at -50°C, it is kept and frozen for 10 minutes at a pressure of 10 MPa to obtain a pressed material, and then the obtained pressed material is transferred to a vacuum drying oven at a pressure of 60 Pa and a temperature of 85°C Conditions, drying to constant weight, to obtain graphene once;

[0036] In parts by weight, get 10 parts of primary treatment graphene, 100 parts of absolute ethanol, 10 parts of fatty acid, 4 parts of titanate, 0.3 part of surfactant, 2 parts of succinonitrile, first process the primary treatment of graphene, no Water ethanol, fatty acid and titanate are mixed and poured into the reactor, heated and refluxed for 3 hours, then the material in the reactor is poured into the ball mill jar, and surfactant a...

example 2

[0043] Mix graphene and water at a mass ratio of 1:30, add polystyrene sulfonate with 5% graphene mass, and disperse ultrasonically for 25 minutes at an ultrasonic frequency of 50 kHz to obtain a graphene dispersion. After the dispersion liquid is frozen at -40°C, it is kept and frozen for 20 minutes at a pressure of 15 MPa to obtain a pressed material, and then the obtained pressed material is transferred to a vacuum drying oven at a pressure of 70 Pa and a temperature of 90°C Conditions, drying to constant weight, to obtain graphene once;

[0044] In parts by weight, get 12 parts of primary treatment graphene, 110 parts of absolute ethanol, 15 parts of fatty acid, 5 parts of titanate, 0.4 part of surfactant, 3 parts of succinonitrile, first process the primary treatment of graphene, no Water ethanol, fatty acid and titanate are mixed and poured into the reactor, heated to reflux for 4 hours, and then the material in the reactor is poured into the ball mill jar, and surfactan...

Embodiment 3

[0051] Mix graphene and water at a mass ratio of 1:50, add polystyrene sulfonate with 10% graphene mass, and disperse ultrasonically for 30 minutes at an ultrasonic frequency of 80 kHz to obtain a graphene dispersion. After the dispersion liquid is frozen at -25°C, it is kept and frozen for 30 minutes at a pressure of 20 MPa to obtain a pressed material, and then the obtained pressed material is transferred to a vacuum drying oven at a pressure of 80 Pa and a temperature of 100°C Conditions, drying to constant weight, to obtain graphene once;

[0052] In parts by weight, get 15 parts of primary treatment graphene, 120 parts of absolute ethanol, 20 parts of fatty acid, 6 parts of titanate, 0.5 part of surfactant, 5 parts of succinonitrile, first process the primary treatment of graphene, no Water ethanol, fatty acid and titanate are mixed and poured into the reactor, and after heating to reflux for 5 hours, the materials in the reactor are poured into the ball milling tank, and...

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Abstract

The invention discloses a preparation method of super-dispersed graphene, and belongs to the technical field of carbon materials. The preparation method comprises the following steps: mixing graphene,water and polystyrene sulfonate, freezing and squeezing to obtain primarily treated graphene; mixing the primarily treated graphene, absolute ethyl alcohol, a fatty acid and a titanate, performing heating reflux reaction, adding a surfactant and butanedinitrile, performing ball milling and mixing, washing and drying to obtain secondarily treated graphene; mixing the secondarily treated graphene with an adhesive, spin-coating an obtained mixture on the surface of a copper foil, performing high-temperature reaction with diborane, and cooling to obtain a copper foil/graphene composite material;and then carrying out electrochemical reaction by taking a sodium hydroxide solution as an electrolyte, platinum as an anode and the copper foil/graphene composite material as a cathode to separate the copper foil from the graphene, collecting the electrolyte, filtering, washing and drying to obtain the super-dispersed graphene. The product obtained by the invention has good dispersity and uniformity.

Description

technical field [0001] The invention discloses a preparation method of ultra-dispersed graphene, which belongs to the technical field of carbon materials. Background technique [0002] Graphene has excellent comprehensive properties due to its unique structure, but due to the large specific surface area of ​​graphene (2630m 2 / g) and strong van der Waals forces are very prone to agglomeration. In order to solve the problem of graphene agglomeration, functionalized graphene is a commonly used dispersion method at present, which endows graphene with some new properties by covalently or non-covalently modifying the surface of graphene. For example, grafting hydrophilic functional groups such as carboxyl, hydroxyl, and epoxy groups on graphene to convert graphene into graphene oxide, although the dispersion is greatly improved, the structure of graphene is also changed, and the conductivity is seriously reduced. , It is not conducive to the application of graphene in fields su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194
CPCC01B32/194
Inventor 姚丹旭
Owner 姚丹旭
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