Electrothermal coating slurry, preparation method and application

A coating slurry and electric heating technology, applied in the direction of conductive coatings, coatings, etc., can solve the problems that cannot be used for industrial heating, easy to produce toxic and harmful gases, and current path breaks, etc., to achieve stable electrical performance, long working life, coating layer hydrophobic effect

Inactive Publication Date: 2021-10-22
中熵科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, most of the electrothermal coatings on the market are composed of conductive materials and organic film-forming materials. However, after the coating formed by this type of electrothermal coating is applied to electrothermal devices, the organic materials are easy to decompose and denature at high temperatures, even those with the best temperature resistance Polyimide materials are also difficult to use for a long time at 400°C; and when the organic material is decomposed, the bonding bridge between the conductive material and the substrate disappears, and the original current path is broken, causing the coating to fail. Therefore, the existing electrothermal coating The working temperature of the layer is generally designed below 100°C, which cannot be used in the field of industrial heating; in addition, when organic materials are decomposed, they are prone to produce toxic and harmful gases

Method used

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preparation example Construction

[0050] The second aspect of the present application provides a method for preparing an electrothermal coating slurry, the method comprising:

[0051] Step 1, adding an acidic substance to the dispersion of the conductive substance, adjusting the pH to 4-5 to obtain a mixture I;

[0052] Step 2. Mix the mixture I with the silane solution and react to obtain the electrothermal coating slurry, specifically:

[0053] Step 2.1. After mixing the mixture I and the silane solution evenly, adjust the pH to 4-5 with an acidic substance to obtain the mixture II; the solvent of the silane solution is at least one selected from ethanol and water.

[0054] Step 2.2, mix the mixture II and the graphene dispersion evenly, and react to obtain the electrothermal coating slurry.

[0055] Wherein the reaction condition is:

[0056] The reaction temperature is 20~30℃, and the reaction time is 3~4h.

[0057] After mixing the mixture I and the silane solution uniformly in the above step 2.1, use ...

Embodiment 1

[0067] The electrothermal coating slurry of this embodiment includes the components shown in Table 1.

[0068] Table 1 The first component of electrothermal coating slurry

[0069] raw material name Specification Amount added indium tin oxide 80nm 3 parts by weight n-octyltrimethoxysilane 99% 2.7 parts by weight glacial acetic acid Analytical pure 0.1 parts by weight ethanol Analytical pure 10.8 parts by weight ionized water self made 60 parts by weight

[0070] The preparation method of the above-mentioned electrothermal coating slurry is as follows:

[0071] Step 1. Weigh indium tin oxide and place it in a plastic beaker, add glacial acetic acid dropwise to adjust the pH value to 4.5, stop adding glacial acetic acid, and obtain mixture I;

[0072] Step 2. Mix ethanol and n-octyltrimethoxysilane, then add deionized water, stir evenly, and add the mixture I in step 1 into it. Adjust the pH of the mixed solution to ...

Embodiment 2

[0075] The electrothermal coating slurry of this embodiment includes the components shown in Table 2.

[0076] Table 2 The second component of electrothermal coating slurry

[0077] raw material name Specification Amount added indium tin oxide 80nm 6 parts by weight silica 30nm 5 parts by weight n-octyltrimethoxysilane 99% 5.5 parts by weight glacial acetic acid Analytical pure 0.5 parts by weight ethanol Analytical pure 22 parts by weight ionized water self made 70 parts by weight

[0078] The preparation method of the above-mentioned electrothermal coating slurry is as follows:

[0079] Step 1. Weigh indium tin oxide and silicon dioxide according to the prescription and place them in a plastic beaker, add glacial acetic acid dropwise to adjust the pH value to 4.5, stop adding glacial acetic acid, and obtain mixture I;

[0080] Step 2. Mix ethanol and n-octyltrimethoxysilane, then add deionized water, stir...

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Abstract

The invention discloses electrothermal coating slurry, a preparation method and application. The electrothermal coating slurry comprises the following components: 3-6 parts by weight of a conductive substance and 2.7-5.5 parts by weight of silane, wherein the conductive substance is selected from oxides doped with metals, and the silane is selected from at least one of alkoxy silane and alkenyloxy silane. The preparation method of the electrothermal coating slurry comprises the following steps: adding an acidic substance into a dispersion liquid of a conductive substance, and adjusting the pH value to 4-5 to obtain a mixture I; and mixing the mixture I with a silane solution, and performing reacting to obtain electrothermal coating slurry. The surface of an electric heating device is coated with the coating slurry, the coating slurry is dried, an electrothermal coating is obtained, and the coating is applied to glass and / or rearview mirrors of new energy automobiles. A cross-linked network can be formed between the film-forming substance and the conductive substance, so that a conductive path is stable, and the service life of the formed coating is long; and the film-forming substance and the conductive substance are both inorganic substances, so that toxic and harmful gases cannot be generated at high temperature.

Description

technical field [0001] The application relates to an electrothermal coating slurry, a preparation method and an application, and belongs to the technical field of electrothermal materials. Background technique [0002] Conductive coatings are special functional materials that have developed rapidly in the past half century and are widely used in static elimination, electromagnetic shielding, heaters and other electronic equipment. In recent years, research on the performance of electrothermal coatings is still a hot spot. [0003] At present, most of the electrothermal coatings on the market are composed of conductive materials and organic film-forming materials. However, after the coating formed by this type of electrothermal coating is applied to electrothermal devices, the organic materials are easy to decompose and denature at high temperatures, even those with the best temperature resistance Polyimide materials are also difficult to use for a long time at 400°C; and wh...

Claims

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Application Information

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IPC IPC(8): C09D5/24C09D183/07C09D183/04
CPCC09D5/24C09D183/04C09D4/00C08G77/20C08G77/04
Inventor 张伟郭新雨
Owner 中熵科技(北京)有限公司
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