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Graphene conductive composite material and preparation method thereof

A conductive composite material and graphene technology, applied in the field of composite materials, can solve the problems of graphene self-agglomeration, insufficient electrical conductivity, and influence on electrical conductivity, so as to achieve uniform dispersion of fillers, improved electrical conductivity, and improved electrical conductivity. Good results

Inactive Publication Date: 2017-11-03
合肥泓定科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation methods of graphene / polymer composite materials can adopt melting, solution and in-situ reduction methods, but only the method of melt blending can realize industrial production, but the problem that follows is that graphene is self-agglomerating, so It will affect its conductivity, and the conductivity will not be fully exerted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation of above-mentioned graphene conductive composite material, the method comprises the following specific steps:

[0018] Step 1: Add 5 parts by weight of carbon nanotubes to the aqueous dispersion prepared by 5 parts by weight of graphene nanosheets, and mix thoroughly to obtain a first mixture.

[0019] Step 2: adding 50 parts by weight of the polymer matrix to the first mixture, mixing uniformly, and ultrasonically treating to obtain a second mixture;

[0020] Step 3: Add 10 parts by weight of conductive carbon black to the second mixture, mix evenly, and dry in an oven at 60°C for 30 minutes. After removing water, polyurethane containing graphene nanosheets and carbon nanotubes is obtained. Matrix Conductive Composite.

[0021] As a preference of this embodiment, the polymer matrix is ​​one or more of water-soluble polyurethane, polyvinyl alcohol, water-soluble epoxy resin and water-soluble acrylic resin.

[0022] As a preference of this embodiment, the...

Embodiment 2

[0024] A preparation of above-mentioned graphene conductive composite material, the method comprises the following specific steps:

[0025] Step 1: Add 8 parts by weight of carbon nanotubes to the aqueous dispersion prepared by 8 parts by weight of graphene nanosheets, and mix thoroughly to obtain a first mixture.

[0026] Step 2: adding 80 parts by weight of the polymer matrix to the first mixture, mixing uniformly, and ultrasonically treating to obtain a second mixture;

[0027] Step 3: Add 15 parts by weight of conductive carbon black to the second mixture, mix evenly, and dry in an oven at 65°C for 25 minutes. After removing water, polyurethane containing graphene nanosheets and carbon nanotubes is obtained. Matrix Conductive Composite.

[0028] As a preference of this embodiment, the polymer matrix is ​​one or more of water-soluble polyurethane, polyvinyl alcohol, water-soluble epoxy resin and water-soluble acrylic resin.

[0029] As a preference of this embodiment, the...

Embodiment 3

[0031] A preparation of above-mentioned graphene conductive composite material, the method comprises the following specific steps:

[0032] Step 1: 10 parts by weight of the aqueous dispersion prepared by graphene nanosheets, 10 parts by weight of carbon nanotubes are added thereto, and fully mixed evenly to obtain the first mixture.

[0033] Step 2: adding 100 parts by weight of the polymer matrix to the first mixture, mixing uniformly, and ultrasonically treating to obtain a second mixture;

[0034] Step 3: Add 18 parts by weight of conductive carbon black to the second mixture, mix evenly, and dry in an oven at 50°C for 40 minutes. After removing water, polyurethane containing graphene nanosheets and carbon nanotubes is obtained. Matrix Conductive Composite.

[0035] As a preference of this embodiment, the polymer matrix is ​​one or more of water-soluble polyurethane, polyvinyl alcohol, water-soluble epoxy resin and water-soluble acrylic resin.

[0036] As a preference of...

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PUM

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Abstract

The invention discloses a graphene conductive composite material and a preparation method thereof. The graphene conductive composite material is prepared from the following components in parts by weight: 0.01 to 10 parts of graphene nanosheet, 1 to 10 parts of carbon nano tube, 5 to 20 parts of conductive carbon black and 10 to 100 parts of polymer matrix. The graphene nanosheet is firstly loaded on the carbon nano tube, then the graphene nanosheet and the carbon nano tube are loaded on the polymer matrix together, so that the conductivity of the conductive composite material is remarkably improved; furthermore, the invention provides the preparation method of the graphene conductive composite material, the operation is simple, filler is uniformly dispersed, and the prepared conductive composite material is good in quality and good in conductivity.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a graphene conductive composite material and a preparation method thereof. Background technique [0002] Graphene is a sp 2 A new carbonaceous material with a two-dimensional honeycomb lattice structure formed by close packing of hybridized carbon atoms, with a thickness of one or more atomic layers. Graphene exhibits excellent electron transport capability, and its electron mobility is as high as 15000cm2 / V·S at room temperature. [0003] The key to preparing high-performance graphene / polymer conductive composites is to obtain graphene with a single layer and the uniform dispersion of graphene in the polymer. So far, graphene can be obtained through the following four methods: chemical vapor deposition, epitaxial growth, mechanical exfoliation and redox method. Only the redox method makes a large amount of graphene used in composite materials. Graphene / polymer com...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L29/04C08L63/00C08L33/00C08K9/12C08K7/00C08K3/04C08K7/24
CPCC08L75/04C08K3/04C08K7/00C08K7/24C08K9/12C08K2201/001C08K2201/011C08K2201/014C08L29/04C08L33/00C08L63/00
Inventor 汪泽维黄浩郭伟
Owner 合肥泓定科技有限公司