Electrothermal coating slurry, preparation method and application

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...

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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