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High-efficiency thermally-conductive graphene far infrared heating film and preparation method thereof

A technology of far-infrared heating film and thermally conductive graphite, used in electric heating devices, ohmic resistance heating, heating element materials, etc., can solve the problems of low heating rate, high energy consumption, slow thermal conductivity, etc., to reduce resistance and improve conversion. Efficiency, high adhesion effect

Active Publication Date: 2019-11-01
北京烯研科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the current research, the heating elements in the electric heating system are generally made of metal materials, and the most used is nickel-chromium alloy. These materials generally have problems such as low heating rate, slow heat conduction speed, and large energy consumption. There are very few studies, especially for the rapid heat generation under low energy consumption, so that the electric heating film can be used in the field of aviation deicing, etc. There are few reports

Method used

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  • High-efficiency thermally-conductive graphene far infrared heating film and preparation method thereof

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Embodiment 1

[0033] A high-efficiency heat-conducting graphene far-infrared heating film is composed of a conductive paste layer and an insulating substrate, and the parts by weight of each component forming the conductive paste layer are:

[0034] Hydrotalcite modified graphene 50 parts

[0035] Water glass 45 parts

[0036] Terpineol 40 parts

[0037] 20 parts of water-based polyurethane

[0038] 5 parts ethyl cellulose

[0039] Dispersant 6 parts

[0040] Silicone oil 15 parts

[0041] 40 parts of water.

[0042] A method for preparing an efficient heat-conducting graphene far-infrared heating film, comprising the following steps:

[0043] (1) Preparation of hydrotalcite-modified graphene:

[0044] S1. Add graphite powder into the ball mill tank, pour carbon dioxide gas into the ball mill tank to remove the air in the tank, and make the pressure in the tank reach 1.2Mpa, and perform ball milling reaction to obtain carboxylated graphene, and prepare the concentration with deionize...

Embodiment 2

[0051] A high-efficiency heat-conducting graphene far-infrared heating film is composed of a conductive paste layer and an insulating substrate, and the parts by weight of each component forming the conductive paste layer are:

[0052] Hydrotalcite modified graphene 6 parts

[0053] 30 parts of water glass

[0054] Terpineol 30 parts

[0055] Tetrabutyl titanate 10 parts

[0056] 2 parts ethyl cellulose

[0057] Dispersant 4 parts

[0058] Silicone oil 5 parts

[0059] 25 parts of water.

[0060] A method for preparing an efficient heat-conducting graphene far-infrared heating film, comprising the following steps:

[0061] (1) Preparation of hydrotalcite-modified graphene:

[0062] S1. Add graphite powder into the ball milling tank, pour carbon dioxide gas into the ball milling tank to remove the air in the tank, and make the pressure in the tank reach 0.8Mpa, and perform ball milling reaction to obtain carboxylated graphene, and prepare the concentration with deionized w...

Embodiment 3

[0069] A high-efficiency heat-conducting graphene far-infrared heating film is composed of a conductive paste layer and an insulating substrate, and the parts by weight of each component forming the conductive paste layer are:

[0070] Hydrotalcite modified graphene 30 parts

[0071] 40 parts of water glass

[0072] Terpineol 35 parts

[0073] Lipid 15 parts

[0074] 4 parts ethyl cellulose

[0075] Dispersant 5 parts

[0076] Silicone oil 7 parts

[0077] 30 parts of water.

[0078] A method for preparing an efficient heat-conducting graphene far-infrared heating film, comprising the following steps:

[0079] (1) Preparation of hydrotalcite-modified graphene:

[0080] S1, graphite powder is added in the ball mill tank, and carbon dioxide gas is charged into the ball mill tank to get rid of the air in the tank, and the pressure in the tank reaches 1Mpa, and the ball mill reaction is carried out to obtain carboxylated graphene, and the concentration is prepared with deio...

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Abstract

The invention discloses a high-efficiency thermally-conductive graphene far infrared heating film electrothermal film and a preparation method thereof. The electrothermal film is composed of a conductive paste layer and an insulating substrate. The conductive paste layer comprises components: in parts by weight, 6 to 50 parts of graphene, 30 to 45 parts of water glass, 30 to 40 parts of terpineol,10 to 20 parts of lipid, 2 to 5 parts of ethyl cellulose, 4 to 6 parts of a dispersant, 5 to 15 parts of silicone oil and 25 to 40 parts of water. The technical scheme of the invention adopts the mixture of hydrotalcite-modified graphene and slurry to obtain the conductive paste, which can effectively reduce the electrothermal film resistance value, improve the far infrared radiation conversion efficiency, enable the electrothermal radiation conversion efficiency to exceed 80% and realize high temperature rise rate and high thermal conductivity of the electrothermal film; the flame retardantperformance of the electrothermal film is improved, thereby being safer and more reliable; and the conductive paste has high adhesion, thereby avoiding detachment from the substrate.

Description

technical field [0001] The invention relates to the technical field of electric heating films, in particular to a high-efficiency heat-conducting graphene far-infrared heating film and a preparation method thereof. Background technique [0002] Electrothermal materials are used to manufacture heating elements in various resistance heating devices. The heating principle of electrothermal materials is that when electrons accelerate in an electric field, they collide inelastically with phonons, impurities or defects, and release heat energy. When the electric field strength increases, the scattering effect increases, and the mean free path of electrons shortens, so more heat energy is released. According to the current research, the heating elements in the electric heating system are generally made of metal materials, and the most used is nickel-chromium alloy. These materials generally have problems such as low heating rate, slow heat conduction speed, and large energy consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/12H05B3/14H05B3/34
CPCH05B3/12H05B3/14H05B3/34
Inventor 崔秋檀魏蒙华
Owner 北京烯研科技有限公司
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