Graphene constant-temperature electrothermal film and preparation method thereof

A graphene, electric heating film technology, applied in electric heating devices, ohmic resistance heating, electrical components, etc., can solve problems such as unsatisfactory physical and chemical properties, potential safety hazards, troubles, etc., and achieve excellent electric heating performance and far-infrared radiation effect, electrical and thermal conductivity. The effect of excellent performance and broad application prospects

Active Publication Date: 2019-04-16
长沙暖宇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a circuit wound with metal wire or carbon fiber is used as a heating element, it usually has the defect of uneven heating, and it cannot be used after partial damage, and there will be safety hazards
However, the electrothermal film coated with conductive ink made of traditional graphene, carbon nanotubes, conductive carbon black and other materials as conductive fillers, although these nano-carbon materials have good conductivity in theory, but in the actual application process , due to the instability of its nanostructure, its various physical and chemical properties are not ideal
[0004] In addition, once the existing electric heating film is made, its resistance (power) is fixed, and it usually requires manual operation to control the circuit on and off, which is troublesome. At present, there are some improved products that realize intelligent adjustment by setting temperature sensors and other devices. But the structure is relatively complex

Method used

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  • Graphene constant-temperature electrothermal film and preparation method thereof
  • Graphene constant-temperature electrothermal film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] I) Immerse the washed copper sheet in a mixture of 200mL sodium hydroxide solution (10mol / L) and 100mL ammonia water (25%), let it stand for 12h, and then wash it several times with deionized water and absolute ethanol. Dry in the air to get Cu / Cu(OH) 2 The nanorod array is then calcined at 550°C for 2h in an argon atmosphere to obtain the Cu / CuO nanorod array;

[0056] II) Mix 8g of sodium hydroxide and 8g of glucose in 80mL of water, add the composite material obtained in step I) to it, microwave hydrothermal reaction at 160℃ for 1h, after cooling to room temperature, take out the solid with deionized water and Washing with water and ethanol for several times, and drying at 60°C to obtain a Cu sheet supported Cu nanorod array;

[0057] III) Put the material obtained in step II) into a CVD tube furnace. Under a mixed atmosphere of hydrogen (flow rate of 20sccm) and argon (flow rate of 800sccm), the tube furnace is heated to 1000°C at a rate of 5°C / min Then, adjust the hydr...

Embodiment 2

[0060] Accurately weigh 1g of graphene prepared in Example 1, 30g of n-eicosane, 10g of polyurethane resin, 56g of DMF, 1g of HT-5027, 1g of SN-612, 1g of T-7511, mix them and vigorously stir for 2h to fully dissolve the solids Or disperse to obtain a mixed slurry, apply the slurry to the surface of the PVC film by a coating process, set the coating thickness to 120μm, and dry it at 120°C to obtain a conductive composite film with a thickness of about 30μm. Two conductive copper tapes are attached in parallel on both ends of the film as electrodes, and then a layer of polyurethane film is attached to the surface, the PVC film on the other side is removed, and a layer of polyurethane film is also attached to the surface to obtain self-temperature graphene Electric heating film.

Embodiment 3

[0062] Accurately weigh 0.5g graphene prepared in Example 1, 40g n-tetracosane, 5g epoxy resin, 51.5g triethylamine, 1gHT-5027, 1g SN-612, 1g T-7511, mix them and vigorously Stir for 2 hours to fully dissolve or disperse the solids to obtain a mixed slurry. Use the coating process to coat the slurry on the surface of the PTFE film. The coating thickness is set to 160μm, and dried at 130°C to obtain a thickness of about 40μm conductive composite film, two conductive copper tapes are attached in parallel on both ends of the film as electrodes, and then a layer of polyurethane film is attached to the surface, the PVC film on the other side is removed, and a layer of polyurethane film is also attached to the surface , Which is obtained from the constant temperature graphene electric heating film.

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Abstract

The invention provides a graphene constant-temperature electrothermal film and a preparation method thereof. The preparation method comprises the following steps: fully stirring graphene, an alkane substance, resin, an organic solvent and an auxiliary agent at room temperature to prepare mixed slurry, coating the surface of a base film with the slurry, performing drying, arranging conductive electrodes at two ends of the film, removing the base film, and covering the film with an insulating film to obtain the graphene constant-temperature electric heating film. According to the invention, theprepared graphene constant-temperature electric heating film is better in electric conduction and heat conduction performances than that in the prior art due to the adding of a graphene material of aspecial structure, and the self constant temperature (normal-temperature PTC thermal control effect) in a low-temperature range can be realized on the premise of not introducing other temperature control devices. Based on the excellent electric heating performance and the far infrared radiation effect, the far infrared electric heating film has good application prospects in the field of warm-keeping and health-care products.

Description

Technical field [0001] The invention relates to the technical field of electric heating materials, in particular to a graphene thermostatic electric heating film and a preparation method thereof. Background technique [0002] The electric heating film heating system is different from the point heating system represented by radiators, air conditioners, and radiators and the linear heating system represented by heating electric heating. In the area of ​​surface heating, modern aerospace technology is used to develop low-carbon heating. high-tech products. The electric heating film is a semi-transparent polyester film that can generate heat after being energized. It adopts a surface heating method, and most of the heat is emitted in the form of radiation. It not only generates uniform heat, but also has a comprehensive effect that is generally better than traditional convection heating. In recent years, it has been widely favored by users. [0003] Due to the different conductive co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/14H05B3/34
CPCH05B3/145H05B3/34
Inventor 杜涛李思幸贺盼盼其他发明人请求不公开姓名
Owner 长沙暖宇新材料科技有限公司
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