Preparation and application of graphene heating material realizing low-voltage driving

Abstract

A graphene coating contains 5%-30% of aqueous resin, 50%-70% of a graphene dispersion and 10%-30% of a conductive carbon dispersion. Preferably, the graphene coating also contains 0.2%-1% of a wettingdispersant, 0.1%-0.5% of a defoamer, 0.2%-1.0% of a leveling agent, 0.1%-1.0% of a thickener, 0.5%-2% of a solvent and 0-6% of deionized water; preferably, the sum of the components is 100%. The graphene heating coating is a green and environment-friendly water-based coating, and is more environmentally friendly than an existing commercially available oily system. The graphene coating is harmless, environmentally friendly and pollution-free to production workers during coating and use. Little waste water is produced in construction and is easy to treat. The graphene coating is suitable for small-scale production and industrial large-scale production at the same time. The graphene coating has high applicability, can be applied to most polymer films and chemical fiber filaments, and enablescommon polymer materials to have conductive performance. Due to accurate selection of the component materials, graphene and a carbon-based conductive material in the coating, as functional particles,can be fully attached to the polymer surface to form a conductive layer, and the prepared graphene conductive heating material can generate heat quickly, efficiently and uniformly only by switching on a 36V safe voltage. The conductive material prepared with the existing coating technology is stable in resistance value.

Description

technical field [0001] The present invention relates to the field of conductive coatings. Specifically, the present invention relates to a graphene conductive coating and a preparation method thereof, and the application of the graphene conductive coating in fields such as electromagnetic shielding, electronic circuits, and electric heating. Background technique [0002] Graphene is a honeycomb planar film formed by sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called monoatomic layer graphite. Andre Geim and Konstantin Novoselov, physicists at the University of Manchester in the United Kingdom, successfully separated graphene from graphite by micromechanical exfoliation, so they jointly won the 2010 Nobel Prize in Physics. Due to its very good strength, flexibility, electrical conductivity, thermal conductivity, and optical properties, it has been greatly developed in the fields of physics, mate...

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Problems solved by technology

[0007] The polymer composite conductive material prepared by the blending method of conductive particles and polymer, as the content of functional conductive filler increases, the mechanical properties of the composite material decrease sharply, and the prepared functional composite material cannot be practically applied due to poor mechanical properties, and there is an input voltage High, medium and high resistance is unstable, the heating uniformity of the product is poor, and local overheating occurs, which is not conducive to the safe application of the product

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