Graphene/polymer conductive composite material

A technology of composite materials and polymers, which is applied in the field of high-performance, high-conductivity and thermal-conduction graphene/polymer composite materials and their preparation, which can solve the problems of insufficient electrical conductivity, self-agglomeration of graphene, and influence on electrical conductivity, etc. question

Inactive Publication Date: 2014-05-07
HEILONGJIANG XINDA ENTERPRISE GRP
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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

[0019] (1) Firstly, the nylon 66 material is air-dried at 60-80°C for 10 hours before extrusion granulation.

[0020] (2) Each component is calculated based on 100wt%, accurately weigh 95-98wt% of the pretreated nylon 66 material, and add 1-2 wt% antioxidant N-isopropyl-N'-phenylterephthalene Amines, 1-3 wt% plasticizer stearic acid. The mixed materials are mixed evenly on a high-speed mixer, then melted and blended on a twin-screw extruder, drawn into strips through the die of the extruder, cooled with circulating water in a water tank, and cut into strips by a pelletizer after direct traction pellets and injection molded on an injection molding machine.

[0021] (3) The extrusion temperature is 180-300°C to obtain pellets of nylon 66 material, the injection temperature is 200-350°C, and the mold temperature is 150-200°C to obtain a mold with detectable performance.

Embodiment 2

[0023] (1) Firstly, the nylon 66 material is air-dried at 60-80°C for 10 hours before extrusion granulation.

[0024] (2) Add an appropriate amount of concentrated sulfuric acid in an ice-water bath or a reactor with condensing equipment, and slowly add 3g of natural flake graphite and a sufficient amount of sodium nitrate solid while stirring, and then add potassium permanganate in batches, Control the temperature within the range of 0-20°C, then continue to stir, then raise the temperature, the temperature must not exceed 40°C, react for 30-80min under stirring, dilute the reaction solution with an appropriate amount of deionized water, and then use a reducing agent to dilute the unreacted The oxidant is reduced, and finally washed with a large amount of deionized water and the solid-liquid mixture is separated by a centrifuge, and the upper liquid is removed to obtain graphite oxide (GO).

[0025] (3) Dissolve graphite oxide and isocyanate containing benzene rings in DMF by...

Embodiment 3

[0029] (1) Firstly, the nylon 66 material is air-dried at 60-80°C for 10 hours before extrusion granulation.

[0030] (2) Add an appropriate amount of concentrated sulfuric acid in an ice-water bath or a reactor with condensing equipment, and slowly add 3g of natural flake graphite and a sufficient amount of sodium nitrate solid while stirring, and then add potassium permanganate in batches, Control the temperature within the range of 0-20°C, then continue to stir, then raise the temperature, the temperature must not exceed 40°C, react for 30-80min under stirring, dilute the reaction solution with an appropriate amount of deionized water, and then use a reducing agent to dilute the unreacted The oxidant is reduced, and finally washed with a large amount of deionized water and the solid-liquid mixture is separated by a centrifuge, and the upper liquid is removed to obtain graphite oxide (GO).

[0031] (3) Dissolve graphite oxide and isocyanate containing benzene rings in DMF by...

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Abstract

The invention belongs to the field of engineering materials, in particular relates to a preparation method of a graphene / polymer composite material with high performance and high conductivity and heat conduction. The composite material contains 80-95 wt% of high-molecular polymer, 0-15 wt% of one or more layers of graphene, 0.1-2 wt% of antioxidant, and 0.1-3 wt% of plasticizer. The prepared composite material has excellent conductivity, higher heat distortion temperature and excellent mechanical performance, and can be widely applied to supercapacitors, automobile antistatic fenders, door handles, mirror boxes and pass boxes.

Description

technical field [0001] The invention belongs to the field of engineering materials, and in particular relates to a high-performance, high-conductivity and thermal-conduction graphene / polymer 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 capabilities, and its electron mobility at room temperature is as high as 15000 cm 2 / V·S. [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 amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L77/02C08L79/02C08L77/00C08L23/12C08L75/04C08L27/06C08L67/04C08L55/02C08L69/00C08L61/06C08L63/00C08K9/04C08K9/02C08K3/04
CPCC08K3/04C08K9/02C08K9/04C08K2201/001C08L77/06
Inventor 高艳翟春熙刘畅
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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