Graphene based transparent electric heating film and production method thereof

Abstract

The invention relates to a graphene based transparent electric heating film and a production method thereof. The graphene based transparent electric heating film comprises a transparent flexible substrate, a graphene film is arranged on the transparent flexible substrate, a conductive connection mesh film is arranged on the graphene film and provided with electrodes which are electrically connected with the conductive connection mesh film and the graphene film. The electrodes are provided with protective layers covering the electrodes as well as covering the graphene film and the conductive connection mesh film. The graphene transparent electric heating film is suitable for large-scale production, labor cost is greatly reduced, and meanwhile, product stability is improved and the graphene based transparent electric heating film has the advantages of uniformity in heating, high transparency, good flexibility, low cost and good stability. Besides, heating power of the transparent electric heating film can be designed according to practical needs, heating curves can be designed according to service needs, and the heating film is guaranteed to have demisting and defrosting functions. Simultaneously, brittle cracking of glass due to sudden change of temperature is avoided. The graphene based transparent electric heating film is wide in application range, stable and reliable.

Description

technical field [0001] The invention relates to an electric heating film and a preparation method thereof, in particular to a graphene-based transparent electric heating film and a preparation method thereof, belonging to the technical field of electric heating films. Background technique [0002] At present, there are three ways to use the windshield for electric heating defrosting, which are: 1. For example, the defrosting of the rear windshield of a car is to print a thick film resistance wire on the inner surface of the glass, and the resistance wire is not transparent. Yes, so it cannot be printed as a whole, but can only be made into a fence shape, and the windshield is heated by multiple resistance wires in blocks, the temperature rises slowly and unevenly, and the resistance wires are easy to be hung up, resulting in partial failure. , the electric heating film cannot be used on the front windshield due to its opacity; The structure between the two layers of glass, ...

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Problems solved by technology

[0002] At present, there are three ways to use the windshield for electric heating defrosting, which are: 1. For example, the defrosting of the rear windshield of a car is to print a thick film resistance wire on the inner surface of the glass, and the resistance wire is not transparent. Yes, so it cannot be printed as a whole, but can only be made into a fence shape, and the windshield is heated by multiple resistance wires in blocks, the temperature rises slowly and unevenly, and the resistance wires are easy to be hung up, resulting in partial failure. , the electric heating film cannot be used on the front windshield due to its opacity; The structure between the two layers of glass, the defect of this structure is that dust is easy to enter between the two layers of glass, and it cannot be cleaned. Long-term use will affect the driver's sight, and it is relatively thick and expensive to replace; 3. For example, the patent number is ZL200720013801.7, The utility model patent titled "Automotive Windshield Electric Anti-Frost Film" involves a colorless and transparent electric heating film and a thermostat; the colorless and transparent electric heating film is a sprayed film of electric heating paint, and conductive heat-resistant glue for electrodes and thermostats Fixed on the electric heating film, the transparent conductive paint is "TWU-1" brand paint, which is made by dispersing ATO (antimony-doped tin dioxide) in water; it is applied to the synthetic resin film to form Transparent conductive film with anti-static and anti-dust absorption functions, but the material has poor acid and alkali resistance and high brittleness, and ITO and ATO coatings are expensive and the cost is too high

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