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Graphene/carbon nanotube compound, conductive functional polymer and preparation method

A technology of carbon nanotubes and graphene, which is applied in the field of carbon nanomaterials, can solve the problems of small apparent density, uneven dispersion, singleness, etc., and achieve the effect of improving quality and uniformity

Active Publication Date: 2019-10-08
内蒙古信敏惠纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the conductive functional polymers using graphene and carbon nanotubes as conductive fillers still have the problem of poor quality
Specifically, the apparent density of conductive fillers (such as graphene powders and carbon nanotube powders) is small, which makes the apparent density difference between them and polymer particles large, and it is difficult to achieve conductive fillers and high density during production and processing. The uniform feeding of molecular particles leads to the problem of uneven dispersion of graphene and carbon nanotubes in polymers, which seriously affects product quality. At present, the conductive filler in conductive functional polymers is usually one kind (for example, graphene is used as a conductive Conductive functional polymers composed of fillers, or conductive functional polymers composed of carbon nanotubes as conductive fillers), are relatively simple, and are not conducive to the improvement of the quality and performance of conductive functional polymers

Method used

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  • Graphene/carbon nanotube compound, conductive functional polymer and preparation method
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  • Graphene/carbon nanotube compound, conductive functional polymer and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] 1. Preparation of graphene / carbon nanotube composites:

[0072] (1) Mixing graphene powder and carbon nanotube powder in a ratio of 2:1 to obtain a first composite powder. Wherein, the graphene powder body takes 10g, and the carbon nanotube powder body takes 5g.

[0073] (2) Mix the first composite powder and polyethylene wax in a ratio of 1:1, that is, take 15g of polyethylene wax. Put the mixed first composite powder and polyethylene wax into a high-speed crushing mixer for high-speed stirring, the stirring speed is 2500r / min, the stirring time is 10s, and the temperature of the inner cavity of the mixer reaches 90°C during the stirring process. The apparent volume of the second composite powder obtained by high-speed stirring was reduced by nearly 30% compared with that before high-speed stirring.

[0074] (3) Take 200ml of absolute ethanol and mix it with the second composite powder, and add 30g of paraffin oil, and ultrasonically disperse for 1 hour to obtain a d...

Embodiment 2

[0084] 1. Preparation of graphene / carbon nanotube composites:

[0085] (1) Mix the graphene powder and the carbon nanotube powder at a ratio of 5:1 to obtain the first composite powder. Wherein, the graphene powder body takes 25g, and the carbon nanotube powder body takes 5g.

[0086] (2) Mix the first composite powder and polyethylene wax at a ratio of 1:3, that is, take 90g of polyethylene wax. Put the mixed first composite powder and polyethylene wax into a high-speed crushing mixer for high-speed stirring, the stirring speed is 2500r / min, the stirring time is 10s, and the temperature of the inner cavity of the mixer reaches 90°C during the stirring process. The apparent volume of the second composite powder obtained by high-speed stirring was reduced by nearly 50% compared with that before high-speed stirring.

[0087] (3) Mix 400ml of absolute ethanol with the second composite powder, add 60g of paraffin oil, and disperse by ball milling for 1 hour to obtain a dispersio...

Embodiment 3

[0097] 1. Preparation of graphene / carbon nanotube composites:

[0098] (1) Mixing the graphene powder and the carbon nanotube powder at a ratio of 1:5 to obtain the first composite powder. Wherein, the graphene powder body takes 5g, and the carbon nanotube powder body takes 25g.

[0099] (2) Mix the first composite powder and polyethylene wax at a ratio of 1:3, that is, take 90g of polyethylene wax. Put the mixed first composite powder and polyethylene wax into a high-speed crushing mixer for high-speed stirring, the stirring speed is 2500r / min, the stirring time is 10s, and the temperature of the inner cavity of the mixer reaches 90°C during the stirring process. The apparent volume of the second composite powder obtained by high-speed stirring was reduced by nearly 50% compared with that before high-speed stirring.

[0100] (3) Take 400ml of absolute ethanol and mix it with the second composite powder, and add 60g of paraffin oil, and ultrasonically disperse for 1 hour to ...

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Abstract

The invention discloses a graphene / carbon nanotube compound, a conductive functional polymer and a preparation method. The method includes: mixing graphene and carbon nanotubes to obtain first composite powder; mixing the first composite powder with a first adhesion additive, and stirring to obtain second composite powder; mixing the second composite powder with a solvent and a second adhesive additive, and dispersing to obtain dispersion liquid; centrifugally treating the dispersion liquid to obtain graphene / carbon nanotube paste; subjecting the graphene / carbon nanotube paste to pressure screening treatment to obtain a primary product of the graphene / carbon nanotube compound; subjecting the primary product of the graphene / carbon nanotube compound to pressurized granulation to obtain the graphene / carbon nanotube compound. The graphene / carbon nanotube compound prepared according to the method has large apparent density, great and uniform conductivity and mechanical properties of a polymer material can be achieved, and reduction of potential safety hazards, improvement of a processing forming environment and control of transport cost can be realized.

Description

technical field [0001] The present invention relates to the technical field of carbon nanomaterials, in particular to a graphene / carbon nanotube composite and a preparation method thereof, and a graphene / carbon nanotube composite-based conductive functional polymer and a preparation method thereof. Background technique [0002] Graphene (graphene) belongs to two-dimensional nanomaterials, is a kind of carbon atom with sp 2 A single-atom layer carbon material with a honeycomb structure that is hybridized, and carbon nanotubes (carbon nanotubes) are one-dimensional nanomaterials. Both graphene and carbon nanotubes have excellent mechanical, electrical, thermal, and optical properties. Graphene / carbon nanotube composite products have good development prospects in the fields of antistatic, display, electromagnetic shielding and batteries. At present, in order to endow polymers with more excellent and uniform electrical conductivity and mechanical properties, graphene, Carbon n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/04C08L91/06C08L23/06C08K3/04C08K9/04C08K9/00C08J3/22
CPCC08L51/04C08J3/226C08L2205/03C08J2351/04C08J2491/06C08J2423/06C08L91/06C08L23/06C08K3/042C08K3/041C08K9/04C08K9/08C08K9/00
Inventor 郭晓然徐欢朱亚坤樊振兴刘婷婷李金来
Owner 内蒙古信敏惠纳米科技有限公司
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