Graphene heat generating film for electric heating picture, and preparation method thereof

A technology of graphene heating film and electrothermal painting, applied in the field of manufacturing structure of new graphene heating body material, can solve the problems of poor reliability, hidden danger, small square resistance, etc., to improve realization and strength maintenance, and improve emission efficiency , the effect of improving the conversion efficiency

Active Publication Date: 2020-08-28
安徽宇航派蒙健康科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both commercial artificial graphite heat-conducting films and graphene heat-conducting films have the problems of too small square resistance (square resistance <1ohm / sq), and easy damage during the die-cutting process.
The square resistance is too small, so that the heating element can only be designed as a U-shaped series structure, and the reliability becomes poor
The die-cutting process is easily damaged, resulting in cracks and other difficult-to-detect defects in the heating element, which will seriously affect the subsequent hot-pressing yield of the product and cause safety hazards in use

Method used

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  • Graphene heat generating film for electric heating picture, and preparation method thereof
  • Graphene heat generating film for electric heating picture, and preparation method thereof
  • Graphene heat generating film for electric heating picture, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Preparation of graphene hybrid film

[0054] 1. Prepare raw materials according to the following weight (×100g)

[0055]

[0056] Wherein, dispersant is sodium dodecyl sulfate (SDS); Solvent is water;

[0057] 2. Preparation of heating element slurry

[0058] Add graphene oxide powder, single-wall carbon nanotubes, and dispersant to the solvent, stir and mix evenly, and prepare a heating element slurry. The viscosity of the heating element slurry is 5000cPs (usually 500~20000cPs, preferably 2000~8000cPs );

[0059] 3. Preparation of graphene-carbon nanotube composite film

[0060] Pass the heating element slurry through a roll coater for wet coating, and coat the heating element slurry on the substrate PET release film, wherein the coating thickness is controlled to be 100 μm (usually 10 to 1000 μm, preferably 50-200 μm); then the coated film is dried in a tunnel-type drying oven, and the heating element slurry is cured on the surface of the substrate to obtai...

Embodiment 1A

[0088] 1. Preparation of graphene hybrid film

[0089] Same as Example 1

[0090] 2. Preparation of graphene heating element

[0091] 1. Preparation of graphene hybrid composite film

[0092] Same as Example 1

[0093] 2. Patterning

[0094] Same as Example 1

[0095] 3. The first heat treatment

[0096] In addition to bonding multiple (13, usually ≥ 3, preferably 5-15) patterned graphene composite films on the surface of the heating element substrate epoxy resin plate, and the patterned graphene composite films are parallel to each other , at a distance of 5mm from each other (usually patterned graphene composite film 2-10mm), forming a patterned graphene composite film group, such as Figure 1A , all the other are identical with embodiment 1.

[0097] 4. Printed current-carrying electrode treatment

[0098] In addition to printing silver paste at both ends of the patterned graphene composite film group composed of a plurality of parallel patterned graphene composite ...

Embodiment 2

[0102] 1. Preparation of graphene hybrid film

[0103] 1. Prepare raw materials according to the following weight (×100g)

[0104]

[0105] Wherein, the dispersant is polyvinyl alcohol (PVA); the solvent is N-methylpyrrolidone (NMP);

[0106] 2. Preparation of heating element slurry

[0107] Except that the viscosity of the prepared heating element slurry is 8000cPs (usually 500-20000cPs, preferably 2000-8000cPs), the rest is the same as in Example 1;

[0108] 3. Preparation of graphene-carbon nanotube composite film

[0109] In addition to coating the heating element slurry on the PET release film; the coating thickness is 200 μm (usually 10-1000 μm, preferably 50-200 μm); the drying temperature is 180°C (usually 90-180°C); drying The time is except that 20min (usually 20~30min), all the other are identical with embodiment 1;

[0110] 4. Thermal reduction treatment

[0111] Except that the thermal reduction temperature is 600°C (usually 500-1000°C); the heating rate o...

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Abstract

The invention discloses a graphene heat generating film for an electric heating picture, and a preparation method of the graphene heat generating film. The method comprises the following steps: uniformly mixing graphene oxide, carbon nanotubes, a dispersing agent and a solvent in proportion, coating the surface of an insulating base material with the mixture, drying, and curing; carrying out thermal reduction treatment after the insulating base material is peeled off; and carrying out rolling treatment on the film subjected to thermal reduction treatment to prepare the graphene heat generatingfilm. According to the invention, the graphene heat generating film disclosed by the invention is high in heat resistance and heat-conducting property, and the sheet resistance and flexibility of thegraphene heat generating film are regulated and controlled by introducing the carbon nanotubes into the graphene heat generating film, so that the yield of the preparation process of the prepared heat generating body for the electric heating picture is high, and the heat resistance and stability of the heat generating body are superior to those of a traditional graphene material.

Description

technical field [0001] The invention belongs to the field of electric heating product manufacturing, relates to the application of new graphene materials in the field of electric heating paintings, and specifically relates to a manufacturing structure and method using a new graphene heating element material. Background technique [0002] In recent years, electric heating technology and market have developed rapidly, especially with the support of the national coal-to-electricity policy in the north, more and more electric heating equipment has entered ordinary households, meeting the safe and efficient heating needs of northern families in the heating season, and also It provides important product and technical support for the continuous improvement of air quality in major northern cities. [0003] Among all electric heating products, electric heating painting (heating painting) is a product with great market prospects, because it organically combines heating with home inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/34
CPCH05B3/34
Inventor 谭化兵潘智军
Owner 安徽宇航派蒙健康科技股份有限公司
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