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Graphene three-dimensional composite water-based electrothermal ink and preparation method thereof

An electrothermal ink and three-dimensional composite technology, which is applied in ink, household appliances, applications, etc., can solve problems such as re-graphitization and electrothermal conversion efficiency attenuation, and achieve the effects of alleviating resistance attenuation, overcoming power attenuation, and maintaining stable heating performance for a long time

Active Publication Date: 2020-10-20
BEIJING AIKALIFE LNNOVATIVE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention relates to a graphene three-dimensional composite water-based electrothermal ink with stable heat generation. Graphene is first combined with carbon nanotubes, and then arranged in the form of Tiancong carbon black nanoparticles in the gap, so that graphene, carbon nanotubes and carbon black are formed. Three-dimensional stable structure, and fundamentally solve the problem of re-graphitization of electrothermal film after long-term use, and solve the big problem of graphitization that leads to the attenuation of electrothermal conversion efficiency

Method used

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  • Graphene three-dimensional composite water-based electrothermal ink and preparation method thereof
  • Graphene three-dimensional composite water-based electrothermal ink and preparation method thereof

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Embodiment 1

[0038] like Figure 1-2 As shown in the figure, a graphene three-dimensional composite water-based electrothermal ink of the present invention is characterized in that: it includes a graphene dispersion liquid, a carbon nanotube dispersion liquid, a carbon black dispersion liquid, a first water-based resin, a first dispersant and a second dispersant .

[0039] The graphene, carbon nanotubes and carbon black form a three-dimensional stable structure through the combination of graphene and carbon nanotubes, and then the carbon black nanoparticles are arranged in the gap, which fundamentally solves the problem of long-term use of the electric heating film. The re-graphitization problem that occurs solves the big problem that the graphitization leads to the attenuation of the electrothermal conversion efficiency. These three materials form a skeleton network, which changes from simple surface-to-surface contact to point-to-point contact, point-to-line contact, line-to-surface con...

Embodiment 2

[0040] Embodiment 2, a preparation method of a graphene three-dimensional composite water-based electrothermal ink of the present invention is characterized in that the specific steps are:

[0041] (1) Preparation of graphene ink separation:

[0042] (1) Get the graphene powder of 0.1-10 parts by weight, add 90-120 parts by weight of pure water at a speed of 5-10 parts by weight / min under stirring, be warming up to 25 ℃~100 ℃ after adding, keep down-spin Stir and keep the temperature constant for 10 hours;

[0043](2) adding the first dispersant of 0.1-5 parts by weight at a speed of 0.1-1 parts by weight / min, heating up to 25 ℃~100 ℃ after adding, keeping the downward stirring, and the temperature is constant for 46-50 hours;

[0044] (3) Discharge after cooling to normal temperature;

[0045] (2) Preparation of multi-wall carbon nanotube ink separation:

[0046] (1) Get 4-10 parts by weight of multi-walled carbon nanotube powder, add 90-120 parts by weight of pure water a...

Embodiment 3

[0058] Embodiment 3, on the basis of the above embodiment, in the step (4), including steps:

[0059] (11) The graphene ink liquid separation obtained in the step (1) and the multi-walled carbon nanotube ink liquid separation obtained in the step (2) are mixed according to 1:1, and the obtained mixed solution is mixed with 5-10 wt. Add the first water-based resin at a rate of parts per minute, heat up to 70°C to 90°C at a constant speed of 2-6°C / min, keep stirring at 1500-2000rpm / min, and maintain a constant temperature for 0.8-1.5 hours;

[0060] (12) The graphene-carbon nanotube mixed solution obtained in the step (11) and the multi-walled carbon nanotube ink liquid separation obtained in the step (2) are mixed according to 2:1, and the obtained mixed solution is mixed with 5 -Add the first water-based resin at a rate of 10 parts by weight / min, heat up to 70°C to 90°C at a constant speed of 2-6°C / min, keep stirring at 1500-2000rpm / min, and keep the temperature constant for 0...

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Abstract

The invention provides graphene three-dimensional compound waterborne electrothermal printing ink and a preparation method thereof. The graphene three-dimensional compound waterborne electrothermal printing ink comprises a graphene dispersing liquid, a carbon nanotube dispersing liquid, a carbon black dispersing liquid, a first waterborne resin and a first dispersant, wherein the graphene, the carbon nanotube and the carbon black form a three-dimensional stable structure; by means of a method of forming a three-dimensional nano structural layer with the carbon nanotube by adding the carbon black between graphene, the problems that graphitization again caused by long-term use of an electrothermal film and attenuation of electrothermal conversion efficiency caused by graphitization are solved; the carbon black is granular and can serve as a zero-dimensional nano-material; the carbon nanotube is winding bar like and is a one-dimensional nano-material; the graphene is flaky and is a two-dimensional nano-material; the three materials are combined together to be lapped to a special three-dimensional carbon nano heating body; the printing ink is of a framework type network. Pure surface-to-surface contact is transformed to point-to-point contact, line-to-point contact and surface-to-surface contact, so that the resistance stability of the framework network is improved while the conductive paths are increased.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of nano-composite materials, and relates to a graphene three-dimensional composite water-based electrothermal ink and a preparation method thereof. Background technique [0002] Carbon-based conductive inks with carbon black, graphite, carbon fiber and their mixtures as the main fillers are widely used in membrane switches, flexible circuits, medical electronics, communication equipment and Electromagnetic shielding, etc. Inorganic nano metal series (such as copper series, silver series, etc.) and organic series (mostly conductive polymers) conductive inks have better electrical conductivity, so new ink fillers such as nano conductive materials and polymer conductive materials have gradually replaced carbon series. Dominant research status of conductive fillers. [0003] However, with the discovery and application of carbon nanomaterials such as carbon nanotubes and graphene,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/52C09D11/03
CPCC09D11/03C09D11/52
Inventor 陈利军
Owner BEIJING AIKALIFE LNNOVATIVE TECH CO LTD
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