A kind of preparation method of graphene water-based electrothermal film

Abstract

The invention discloses a preparation method of graphene-containing water-based electrothermal film. The method comprises the following steps of: (1) carrying out hydrophilization treatment on graphene, then adding solutions of cellulose derivatives as a dispersing agent and a thickening agent, and carrying out pre-dispersion; (2) adding an auxiliary agent into the pre-dispersed graphene, and dispersing to obtain homogeneous dispersion liquid; (3) adding an adhesive into the homogeneous dispersion liquid, and mixing to obtain graphene-containing electrothermal film slurry; and (4) coating a film formation carrier with the graphene-containing electrothermal film slurry to form a graphene conducting layer, and drying to obtain the graphene-containing electrothermal film formed by the graphene conducting layer and the film formation carrier. After the preparation method is adopted, a heating body having excellent heat conduction and electric conduction properties can be prepared.

Description

technical field [0001] The invention relates to a novel electrothermal material, in particular to a preparation method of a graphene water-based electrothermal film. Background technique [0002] The electrothermal film heating system is different from the point heating system represented by radiators, air conditioners, and radiators and the line heating system represented by heating cables. It is a low-carbon heating system developed by modern aerospace technology in the field of surface heating. Technology Products. [0003] The principle of electric heating film heating is that under the action of an electric field, the carbon molecular clusters in the heating element produce "Brownian motion", and severe friction and impact occur between carbon molecules, and the heat energy generated is transmitted to the outside in the form of far-infrared radiation and convection. , the conversion rate of electric energy and heat energy is as high as 98%. The action of the carbon mo...

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Problems solved by technology

However, in the actual application process of this patent, there are still the following defects: 1. The graphene oxide dispersion liquid obtained by ultrasonication of graphene oxide requires a large amount of solvent, which is uneconomical and not environmentally friendly; The solvent without bonding ability makes the mechanical properties of the graphene oxide dried into a film poor, and the amount of graphene oxide used is large; 3. After the graphene oxide is dried into a film, it is reduced with a solvent. On the one hand, the solvent is highly toxic, and on the other hand, the reduction Finally, it needs to be dried, which makes the process cumbersome and complicated; 4. Both the film-forming graphene oxide and the reduced graphene oxide have no film-forming material as a carrier, but encapsulate insulating resin or plastic at the upper and lower ends. On the one hand, it will It will affect the heating effect, and it will also increase the difficulty of the process and cause unnecessary trouble