Method for preparing electrothermal film by graphene aqueous slurry

Abstract

The invention discloses a method for preparing an electrothermal film by graphene aqueous slurry. The method comprises the steps of: (1) adding deionized water and an amine compound to solid acrylic resin to obtain water-soluble acrylic resin; (2) adding graphene and an auxiliary agent to the water-soluble acrylic resin, and dispersing and mixing the water-soluble acrylic resin to obtain a homogeneous dispersion liquid; (3) adding a binder to the homogeneous dispersion liquid, and stirring and mixing the homogeneous dispersion liquid to obtain the graphene aqueous slurry; and (4) coating a film-forming carrier with the graphene aqueous slurry to form a graphene conducting layer and drying the graphene conducting layer to obtain the electrothermal film. The electrothermal film with excellent thermal conductivity and electrical conductivity can be prepared with the aqueous slurry; no organic solvent is added in the preparation process; the problem of VOC emission does not exist; and the method is safe and environment-friendly. Compared with other technologies that require special modification of filler, the preparation method is simple; coupling treatment is not carried out on an exothermic material by adoption of a coupling agent; the existing production technology can be simplified; and the production cost is reduced.

Description

technical field [0001] The invention relates to a novel electrothermal material, in particular to a method for preparing an electrothermal film by using graphene water-based slurry. 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 ...

AI Technical Summary

Problems solved by technology

However, in the actual application process of this patent, there are still the following defects: 1. Carbon black powder and graphite powder are used as heating materials. The mixture of the two is difficult to grind and disperse to the required fineness, and forms a good conductive network connection; 2. Carbon black and graphite do not conduct heat, and conduct heat in the form of contact, while the stainless steel strip electrode and copper strip electrode in the electrode group used , aluminum strip electrodes, etc. are all heat-conducting materials, which will inevitably cause uneven heating on the surface of the electrothermal film; 3. A large amount of isopropanol and absolute ethanol are used in the preparation process, and there will be solvent volatilization problems during use; 4. Use insulation 1. Chemically unstable talc powder is used as a filler, which will greatly affect the heating effect of the electric heating film; 5. KH-560, whose mass ratio of carbon heating material is between 1:20 and 1:10, is used as a stabilizer. Expensive, greatly increasing manufacturing costs