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High infrared emitting electrothermal film based on graphene and preparation method of high infrared emitting electrothermal film

An infrared emission and graphene technology, applied in the direction of electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of affecting the practical effect of heating, film heat accumulation, and low heat radiation ratio, so as to reduce internal transmission loss and improve Radiation heat transfer ratio and the effect of enhancing the infrared radiation rate

Active Publication Date: 2018-03-09
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer material in the composite conductive film has low thermal conductivity, low film-forming density, a large number of air bubbles inside, and high thermal resistance, resulting in partial heat energy loss
On the other hand, the current electric heating film does not pay attention to the infrared emissivity, resulting in the accumulation of heat on the surface of the film, part of the heat energy is dissipated by convection and heat conduction, and the proportion of heat radiation is low, which affects the practical effect of heating

Method used

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  • High infrared emitting electrothermal film based on graphene and preparation method of high infrared emitting electrothermal film
  • High infrared emitting electrothermal film based on graphene and preparation method of high infrared emitting electrothermal film
  • High infrared emitting electrothermal film based on graphene and preparation method of high infrared emitting electrothermal film

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preparation example Construction

[0047] Such as figure 1 Shown is a schematic diagram of the preparation process of the conductive heating film, Figure 2-4 Shown is a schematic diagram of the product structure in the preparation process.

[0048] It should be noted that there are many graphene conductive pastes suitable for the present invention, and its main components include: film-forming resin, wetting and dispersing agent, graphene powder, and defoaming agent. Among them, the film-forming resin includes: polyacrylate, polyurethane, epoxy resin, polyolefin resin (such as EVA, PVB), etc.; wetting and dispersing agent and defoaming agent are commercially available common additives, such as BYK (BYK), Corresponding products of EFKA, TEGO and other companies.

Embodiment 1

[0050] S01. Graphene conductive paste consists of (the following parts are all parts by weight): polyacrylate emulsion (prepared by copolymerization of IBOMA and MMA monomers with a mass ratio of 5:1, Tg is 130 ° C, solid content 35wt% ) 25 parts, dispersant (DISPERBYK-190) 6 parts, graphene powder 7 parts, defoamer (BYK-019) 1 part. The above components were mixed evenly to form a graphene conductive paste, which was coated on the support substrate 100, dried at 85° C. for 5 minutes, heated and dried at about 150° C. for 10 minutes, and an initial conductive coating 101 was obtained.

[0051] S02. The supporting substrate 100 coated with the initial conductive coating 101 obtained in step S01 is placed in the cavity, and a glass plate with a smooth surface is placed horizontally on it (the side of the glass plate in contact with the coating is subjected to a release treatment, and the surface The tension is less than 20 dynes / cm). Close the chamber, start the vacuum pump to re...

Embodiment 2

[0056] S01. The composition of graphene conductive paste is (the following parts are all parts by weight): 10 parts of polyurethane emulsion (Netherlands Stahl PU653, Tg is 75 ° C), 5 parts of dispersant (DISPERBYK-190), graphene powder 6 parts, 1 part of defoamer (BYK-019). The above components were mixed evenly to form a graphene conductive paste, which was coated on the support substrate 100, dried at 90°C for 5 minutes, heated and dried at about 95°C for 10 minutes, and an initial conductive coating 101 was obtained.

[0057] S02. The supporting substrate 100 coated with the initial conductive coating 101 obtained in step S01 is placed in the cavity, and a glass plate with a smooth surface is placed horizontally on it (the side of the glass plate in contact with the coating is subjected to a release treatment, and the surface The tension is less than 20 dynes / cm). Close the chamber, start the vacuum pump to reduce the pressure in the chamber to 500Pa, turn on the heating,...

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Abstract

The invention provides a high infrared emitting electrothermal film based on graphene and a preparation method of the high infrared emitting electrothermal film. The preparation method comprises the following steps that S01, the surface of a supporting substrate is coated with graphene electroconduction slurry, an initial state conductive coating is formed through step-by-step heating and drying;S02, the obtained initial state conductive coating is densified, and the treated densified conductive coating is obtained; S03, inorganic or organic filler is added into the graphene electroconductionslurry obtained in the step S01, and modified graphene slurry is obtained after even mixing is carried out; S04, the surface of the densified conductive coating is coated with the modified graphene slurry, a rough surface coating is obtained after heating and drying are carried out, and the high infrared emitting electrothermal film is formed by the densified conductive coating and the rough surface coating. The electrothermal film is densified, internal holes are removed, the heat conductivity coefficient is increased, and the internal transmission losses of heat are reduced; by means of thesurface ultrathin rough coating, the infrared radiance rate is enhanced, and the radiative heat transfer proportion is increased.

Description

technical field [0001] The invention relates to the field of electrothermal film materials, in particular to a graphene-based high infrared emission electrothermal film and a preparation method thereof. Background technique [0002] The application of electric heating materials has a long history, ranging from traditional electric blankets to emerging electric heating films. Traditional electric heating elements, such as electric heating alloy wire, electric heating tube, etc., are usually linear conductive heating elements. Not only the heating area is small, but also the heat is often too concentrated, local overheating, and part of the heat loss, so the thermal efficiency is very low. Emerging electric heating films, which are surface conductors, have gradually become the development trend in the field of electric heating, including metal particle-based electric heating films, metal oxide-based electric heating films, carbon-based electric heating films, etc. Among them,...

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 姜浩李朝龙马金鑫徐鑫史浩飞
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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