High-conductivity flexible touch graphene composite material and preparation method thereof

A technology of flexible touch and composite materials, which is applied in the field of highly conductive flexible touch graphene composite materials and its preparation, can solve the problems of low conductivity, easy agglomeration, and poor ductility of composite materials, so as to optimize the conductive network structure, Satisfies application requirements and enhances conductivity

Inactive Publication Date: 2018-11-13
TIANJIN BAOXINGWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unique crystal structure of graphene makes it have high thermal conductivity, high mechanical strength, peculiar electrical properties and optical properties, so it is widely used in flexible touch composite materials. However, graphene has a large specific surface area due to its powder, It is easy to agglomerate, and the agglomerated graphene conductive filler is difficult to disperse evenly in the matrix, so that at a lower content of conductive filler, the conductivity of the composite material is low, and there is a defect of poor ductility, which is difficult to meet the needs of current electronic devices for flexible touch control. Material Application Requirements

Method used

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  • High-conductivity flexible touch graphene composite material and preparation method thereof
  • High-conductivity flexible touch graphene composite material and preparation method thereof
  • High-conductivity flexible touch graphene composite material and preparation method thereof

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preparation example Construction

[0023] A method for preparing a highly conductive flexible touch graphene composite material of the present invention is characterized in that the steps are:

[0024] (1) weigh the parts by weight of each component by formula;

[0025] (2) Add carbon nanotubes to the graphene hydrosol, place the mixed system in an ultrasonic instrument for ultrasonic dispersion for 3-4 hours, and obtain a graphene-carbon nanotube composite dispersion, which is then placed in a vacuum drying oven after suction filtration and washing Overnight at 65°C;

[0026] (3) The graphene-carbon nanotube composite dispersion in step (2) is placed in agitating ball milling equipment, and carboxymethylcellulose potassium and zirconium dioxide powder are added while stirring at a speed of 1300-1500r / min , silver powder, and polydimethylsiloxane, after the addition is complete, fully mix for 40 minutes to obtain a mixed system;

[0027] (4) Place the mixing system in a mechanical stirring device, add polyimi...

Embodiment 1

[0030] A kind of highly conductive flexible touch graphene composite material, its parts by weight are composed as follows:

[0031]

[0032]

[0033] The graphene hydrosol is composed of 2 parts of graphene oxide, 2 parts of hydrazine hydrate, 2 parts of concentrated ammonia water and 14 parts of distilled water by mass.

[0034] The particle size of the zirconia powder is 0.1 μm.

[0035] The particle size of the silver powder is 0.1 μm.

[0036] Preparation method: Taking the preparation of a highly conductive flexible touch graphene composite material as an example, the preparation method of a highly conductive flexible touch graphene composite material provided in this embodiment is described as follows:

[0037] (1) Weigh 20 parts of graphene hydrosol, 5 parts of silver powder with a particle size of 0.1 μm, 1 part of carbon nanotube, 0.3 part of carboxymethylcellulose potassium, 10 parts of polyimide, and polydimethylcellulose according to the formula. 6 parts o...

Embodiment 2

[0043] A kind of highly conductive flexible touch graphene composite material, its parts by weight are composed as follows:

[0044]

[0045]

[0046] The graphene hydrosol is composed of 2.5 parts of graphene oxide, 2.5 parts of hydrazine hydrate, 2.5 parts of concentrated ammonia water and 17.5 parts of distilled water by mass.

[0047] The particle size of the zirconia powder is 0.3 μm.

[0048] The particle size of the silver powder is 0.5 μm.

[0049] Preparation method: Taking the preparation of a highly conductive flexible touch graphene composite material as an example, the preparation method of a highly conductive flexible touch graphene composite material provided in this embodiment is described as follows:

[0050] (1) Weigh 25 parts of graphene hydrosol, 8 parts of silver powder with a particle size of 0.5 μm, 10 parts of carbon nanotubes, 0.4 parts of carboxymethylcellulose potassium, 14 parts of polyimide, and polydimethylcellulose according to the formula...

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Abstract

The invention relates to a high-conductivity flexible touch graphene composite material and a preparation method thereof. The high-conductivity flexible touch graphene composite material comprises thefollowing components: 20 to 25 parts of graphene hydrosol, 5 to 8 parts of aluminum powder, 1 to 10 parts of carbon nanotube, 0.3 to 0.4 part of potassium carboxymethylcellulose, 10 to 14 parts of polyimide, 6 to 8 parts of polydimethylsiloxane, and 0.2 to 0.45 part of zirconium dioxide powder. The preparation method comprises the following step: mixing all the components, so as to form the high-conductivity flexible touch graphene composite material. The method is simple in technology, effectively avoids the situation of agglomeration caused by large specific surface area of graphene powderthrough the added the graphene hydrosol, optimizes a conductive network structure in the composite material through the added zirconium dioxide powder and a potassium carboxymethylcellulose dispersingagent, further improves the electrical conductivity of the composite material while enhancing the ductility of the composite material through the added aluminum powder, and meets the application requirements on flexible touch materials by current electronic devices.

Description

technical field [0001] The invention relates to the field of flexible touch composite materials, in particular to a highly conductive flexible touch graphene composite material and a preparation method thereof. Background technique [0002] With the rapid development of modern information technology, flexible touch materials are more and more widely used in electronic devices. Graphene is a two-dimensional periodic honeycomb lattice structure composed of carbon six-membered rings. Basic units of base materials such as fullerenes in 0D, carbon nanotubes in 1D and graphite in 3D. The unique crystal structure of graphene makes it have high thermal conductivity, high mechanical strength, peculiar electrical properties and optical properties. Therefore, it is widely used in flexible touch composite materials. However, graphene has a large specific surface area due to its powder. It is easy to agglomerate, and the agglomerated graphene conductive filler is difficult to disperse u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L83/04C08L1/28C08K13/02C08K3/08C08K3/04C08K3/22
CPCC08L79/08C08K2003/0806C08K2003/2244C08K2201/001C08K2201/003C08K2201/011C08L2203/20C08L2205/03C08L83/04C08L1/286C08K13/02C08K3/08C08K3/041C08K3/042C08K3/22
Inventor 司荣美潘中海刘彩风
Owner TIANJIN BAOXINGWEI TECH
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