Method for preparing functionalized graphene and composite material of functionalized graphene

A composite material and graphene technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, carbon compounds, etc., can solve problems such as influence, large degree of damage to graphite hybrid structure, etc., to reduce the degree of agglomeration , enhance the interface performance, and promote the effect of dispersion

Inactive Publication Date: 2013-01-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong acid oxidation process, this method has a very large degree of damage to the original graphite hybrid structure. Even after chemical reduction or high-temperature heat treatment reduction, it cannot reach a greater degree, which directly affects the obtained graphite to a greater extent. A series of special properties that ene itself should have

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of functionalized graphite: Mix graphite (0.1g), p-aminobenzoic acid (0.5g), and anhydrous aluminum chloride into a three-necked flask, and heat at 90°C for 5 hours under mechanical stirring. , to obtain purified modified graphite after extraction.

[0041] (2) Ultrasonic disperse the modified graphite in the acetone solvent with an initial solubility of 0.5mg / ml, add epoxy resin, mix evenly by ultrasonic, distill off the acetone under reduced pressure, add curing agent, accelerator, silver flake in turn, and stir evenly , Cured at 150°C / 3h to obtain epoxy conductive adhesive.

[0042] The parts by weight of conductive adhesive for the above configuration:

[0043] 100 parts epoxy resin

[0044] Methyl hexahydrophthalic anhydride curing agent 85 parts

[0045] 2E4MZ-CN 1.85 parts

[0046] 800 pieces of silver

[0047] Graphene 0.5 parts

[0048] Use a low-resistance test system to test its resistance, and calculate its volume resistivity. Volume r...

Embodiment 2

[0050](1) Preparation of functionalized graphite: Mix graphite (0.2g), 3,5-diaminobenzoic acid (0.2g), polyphosphoric acid / phosphorus pentoxide into a three-necked flask, and stir , heated at 150°C for 72 hours, and purified modified graphite was obtained after extraction.

[0051] (2) Ultrasonic disperse the modified graphite in the acetonitrile solvent with an initial solubility of 1 mg / ml, add epoxy resin, mix evenly by ultrasonic, remove the acetonitrile by distillation under reduced pressure, add curing agent, accelerator, silver flake in sequence, and stir evenly. Curing at 150°C / 3h to obtain epoxy conductive adhesive.

[0052] The parts by weight of conductive adhesive for the above configuration:

[0053] 100 parts epoxy resin

[0054] Methyl hexahydrophthalic anhydride curing agent 80 parts

[0055] 2E4MZ 1 copy

[0056] 1000 pieces of silver

[0057] Graphene 5 parts

[0058] Use a low-resistance test system to test its resistance, and calculate its volume resi...

Embodiment 3

[0060] (1) Preparation of functionalized graphite: Mix graphite (0.4g), p-aminobenzoic acid (0.2g), polyphosphoric acid / phosphorus pentoxide into a three-necked flask, heat for 130 ℃ for 48 hours, and the purified modified graphite was obtained after extraction.

[0061] (2) Ultrasonically disperse the modified graphite in an ethanol solvent with an initial solubility of 5 mg / ml, add epoxy resin, mix evenly by ultrasonic, distill off the ethanol under reduced pressure, add curing agent, accelerator, and silver flakes in sequence, and stir evenly. Curing at 150°C / 3h to obtain epoxy conductive adhesive.

[0062] The parts by weight of conductive adhesive for the above configuration:

[0063] 100 parts epoxy resin

[0064] Methyl hexahydrophthalic anhydride curing agent 85 parts

[0065] 2E4MZ-CN 1.85 parts

[0066] 500 pieces of silver

[0067] 1 part graphene

[0068] Use a low-resistance test system to test its resistance, and calculate its volume resistivity. Volume re...

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Abstract

The invention discloses a method for preparing functionalized graphene and a composite material of the functionalized graphene. The method for preparing the functionalized graphene comprises the following steps of: performing Friedel-Crafts reaction on natural graphite which is taken as a raw material to obtain modified graphite, extracting, purifying, and uniformly dispersing in an organic solvent with ultrasonic to form stable graphene suspension liquid. The method for preparing the composite material comprises the following steps of: adding epoxy resin into the graphene suspension liquid, stirring for dissolving, uniformly mixing with ultrasonic, distilling under reduced pressure to remove the organic solvent to obtain a graphene/epoxy resin composite; and adding an epoxy resin curing agent, an accelerant and micrometer silver sheets sequentially, and heating for curing to obtain the composite material of a graphene polymer, namely a graphene/epoxy resin conducting composite material. The edge functionalized graphene has a high interaction between functional groups at the edge and a polymer matrix, so that the dispersion of the graphene in the polymer matrix can be promoted, the agglomeration degree can be reduced, and the interface performance of the composite material can be enhanced.

Description

Technical field [0001] The present invention involves a method for preparing graphene in a functional fossil, which specifically involves a preparation method for functional pyramina and its composite materials. Background technique [0002] In 2004, the Geim research team of the University of Manchester in the United Kingdom prepared a stable graphene for the first time, setting off a research boom in graphene.The ideal graphene structure is a two -dimensional crystal material for the unlimited expansion of SP2 hybolized carbon atoms. It is currently the thinnest single atomic thickness material in the world.Graphene not only has excellent electrical performance (electronic migration rate at room temperature can reach 2 × 10 5 CM 2 / (V · s)), prominent thermal conductivity (5000 w / m · k), extraordinary ratio surface area (2630 m 2 / G), there are also Yang's modulus (1100 GPA) and fracture strength (125 GPA) comparable to carbon nano -nano -pipes.EssenceThe preparation of graphen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00
CPCC01B31/0484C08K2201/011C08L63/00C09J163/00C09J9/02C08K3/04B82Y30/00B82Y40/00C01B32/194C08K3/042
Inventor 刘岚刘孔华罗远芳贾德民
Owner SOUTH CHINA UNIV OF TECH
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