Graphene flexible conductive composite film and preparation method thereof

A graphene composite and composite film technology, which is applied in the direction of equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, conductive layers on insulating carriers, etc., can solve problems such as low resistivity, few functional groups, and difficulty in dispersion problem, to achieve the effect of improving conductivity, reducing the amount of addition, and improving dispersibility

Inactive Publication Date: 2020-05-19
上海超碳石墨烯产业技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, products used in flexible wearable scenarios generally require lower resistivity, which requires more graphene to be added to the material. At the same time, conductive graphene powder has fewer functional groups on the surface, and it will be more difficult to disperse in the resin system.

Method used

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  • Graphene flexible conductive composite film and preparation method thereof
  • Graphene flexible conductive composite film and preparation method thereof
  • Graphene flexible conductive composite film and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0032] Such as figure 1 As shown, the present embodiment provides a method for preparing a graphene composite conductive film, and the specific steps are as follows:

[0033] a) Preparation of highly conductive graphene composite powder: select graphene crystal defect ID / IG=6%, sheet diameter D90=7μm, specific surface area BET=70m 2 9 parts of graphene powder / g, 90 parts of 3,4-ethylenedioxythiophene monomer, 1 part of ferric sulfate initiator; add graphene, 3,4-ethylenedioxythiophene monomer and initiator to the reactor , the reaction temperature is 5°C, the polymerization reaction is 12h, and the reaction protective atmosphere is N 2 , the reactant is cooled and dried, and pulverized to obtain graphene / poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid composite conductive powder;

[0034] b) Preparation of graphene composite dispersion liquid: the ratio of graphite microflakes: conductive carbon black: pure water is 1:1:90, and the dispersion adopts a high-speed di...

Embodiment 2

[0040] This embodiment provides a graphene composite conductive film. The difference between this embodiment and Embodiment 1 is that in step a), the graphene crystal defect ID / IG=4% is selected, and the rest of the steps are the same.

Embodiment 3

[0042] This embodiment provides a graphene composite conductive film. The difference between this embodiment and Embodiment 1 is that in step a), the graphene crystal defect ID / IG=8% is selected, and the rest of the steps are the same.

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Abstract

The invention provides a graphene flexible conductive composite film, which is characterized by being prepared from the following raw material components in parts by weight: 1 to 10 parts of graphene / poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid composite conductive powder, 1 to 5 parts of other conductive substances, 70 to 99 parts of flexible filler, 0.5 to 5 parts of inorganic filler and 0.1 to 1 part of dispersing agent. The high-conductivity graphene powder is prepared through in-situ polymerization of PEDOT and graphene, so that on one hand, the conductivity of graphene is improved, and the addition amount of graphene in a flexible conductive wearable product is reduced; on the other hand, through modification of PEDOT, the surface state of graphene is improved, and the dispersity of graphene in a slurry system is improved.

Description

technical field [0001] The invention belongs to the field of graphene, and in particular relates to a graphene flexible conductive composite film and a preparation method thereof. Background technique [0002] Graphene is known as the "king of new materials", it is made of a completely SP 2 The quasi-two-dimensional crystal material composed of hybridized carbon atoms with a thickness of only one atomic layer or several single atomic layers has excellent properties such as high electrical conductivity, high strength, and high thermal conductivity. These excellent properties of graphene make it It shows good application prospects in flexible wearable scenarios such as low-voltage flexible electric heating film and flexible wearable sensors. [0003] However, products used in flexible wearable scenarios generally require lower resistivity, which requires more graphene to be added to the material. At the same time, conductive graphene powder has fewer functional groups on the ...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L65/00C08L25/06C08K3/04C08J5/18H01B1/18H01B1/22H01B5/14H01B13/00
CPCC08J5/18C08J2375/04C08J2425/06C08J2465/00C08K3/04C08K2201/001C08K3/042H01B1/18H01B1/22H01B5/14H01B13/0026
Inventor刘志成王文强梁勇
Owner上海超碳石墨烯产业技术有限公司