A kind of electrothermal painting and preparation method thereof

An electrothermal drawing and heating element technology, which is applied in the field of manufacturing structure of new graphene heating element materials, can solve the problems that the heating element is prone to cracks, affects the hot pressing yield of products, and deteriorates reliability, and prolongs the working life time. , The effect of improving heating effect and high conversion efficiency

Active Publication Date: 2022-04-08
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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  • A kind of electrothermal painting and preparation method thereof
  • A kind of electrothermal painting and preparation method thereof
  • A kind of electrothermal painting and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] 1. Preparation of graphene hybrid film

[0133] 1. Prepare raw materials according to the following weight (×100g)

[0134]

[0135] Wherein, dispersant is sodium dodecyl sulfate (SDS); Solvent is water;

[0136] 2. Preparation of heating element slurry

[0137] 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 );

[0138] 3. Preparation of graphene-carbon nanotube composite film

[0139] 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 ~ 200μm); then the coated film is dried in a tunnel drying oven, and the heating element slurry is cured on the surface of the substrate to obtain a ...

Embodiment 1A

[0180] 1. Preparation of graphene hybrid film

[0181] Same as Example 1

[0182] 2. Preparation of graphene heating element

[0183] 1. Preparation of graphene hybrid composite film

[0184] Same as Example 1

[0185] 2. Patterning

[0186] Same as Example 1

[0187] 3. The first heat treatment

[0188] 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.

[0189] 4. Printed current-carrying electrode treatment

[0190] 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

[0196] 1. Preparation of graphene hybrid film

[0197] 1. Prepare raw materials according to the following weight (×100g)

[0198]

[0199] Wherein, the dispersant is polyvinyl alcohol (PVA); the solvent is N-methylpyrrolidone (NMP);

[0200] 2. Preparation of heating element slurry

[0201] 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;

[0202] 3. Preparation of graphene-carbon nanotube composite film

[0203] 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 time Except for 20min (usually 20~30min), all the other are identical with embodiment 1;

[0204] 4. Thermal reduction treatment

[0205] Except that the thermal reduction temperature is 600°C (usually 500-1000°C); the heating rate of the th...

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Abstract

The invention discloses an electrothermal painting and a preparation method thereof. The method of the invention comprises the steps of attaching a graphene hybrid film on the surface of an insulating substrate, and then performing a first hot-pressing treatment; and then printing on opposite ends of the graphene hybrid film A current-carrying electrode; then an insulating substrate is bonded on the other side of the graphene hybrid film, and a second hot-pressing treatment is performed to obtain a graphene hybrid heating element; finally, a metal frame is used to heat the decorative painting and graphene hybrid The body and the insulation board are assembled according to the order from the outside to the inside, and the intervals between two adjacent layers are arranged, that is to say. The graphene hybrid film in the electrothermal painting of the present invention has high heat resistance and thermal conductivity, and its square resistance and flexibility can be adjusted, the service life of the prepared electrothermal painting is significantly prolonged, and the electrothermal conversion efficiency of the electrothermal painting is significantly improved. The electro-thermal conversion efficiency of the electrothermal painting reaches over 72%; the energy saving and heating effects of the electrothermal painting are obviously improved, and the far-infrared radiation efficiency of the prepared heating painting is high after electrification, which meets the needs of far-infrared physiotherapy.

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 Patents(China)
IPC IPC(8): F24D13/02F24D19/06B44C5/02
CPCF24D13/02F24D19/062B44C5/02
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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