Graphene modified inorganic material, preparation method and application

Abstract

The invention relates to a method for preparing a graphene material composited inorganic material. The method comprises steps as follows: an inorganic material and a graphene material are dispersed inan aqueous solution and / or a hydrophilic solution and modified at the temperature of 90 DEG C or higher, and a dispersion liquid containing the graphene material composited inorganic material is obtained. According to the method, the use temperature is lower, expensive production equipment with high energy consumption is not needed, the method is environmentally friendly and energy saving and realizes environmental protection, electric conductivity and heat conductivity of produced multi-batch products have no fluctuation, and the inorganic material can be supported with the graphene materialrapidly, efficiently and stably. The graphene supported composite material obtained after treatment has excellent electric conductivity and heat conductivity, and besides, a graphene loading layer isstable, has lighter color and lower cost and is suitable for most occasions utilizing inorganic conductive materials.

Description

technical field [0001] The invention belongs to the field of inorganic material modification, and relates to a graphene-modified inorganic material, a preparation method and an application. Background technique [0002] Many inorganic materials such as titanium dioxide, mica powder, mica flakes, kaolin, etc. have excellent properties, such as mechanical properties, barrier properties, corrosion resistance, high temperature resistance, flame retardancy, etc. However, since most inorganic materials are insulators, they do not have certain electrical and thermal conductivity, which limits the application of the above materials, such as in electrical products. Therefore, if the inorganic materials can be modified accordingly to obtain a certain degree of electrical and thermal conductivity, the application fields of the above materials will inevitably be greatly expanded. [0003] In recent years, carbon nanostructure materials represented by fullerene, carbon nanotubes, graphe...

AI Technical Summary

Problems solved by technology

However, there are two problems in the graphene-modified inorganic material obtained by the physical compounding method: 1. Since the graphene material is only compounded on the surface of the inorganic material through a simple physical adsorption process, the main force of adsorption is the weak van der Waals Therefore, the composite layer of graphene material is easy to fall off, which makes it difficult to obtain inorganic materials with uniform and stable electrical and thermal conductivity during large-scale preparation.

2. Graphene materials and inorganic materials need to be dispersed during the composite process, so a large amount of graphene solution is required, and the performance of the final composite material is greatly affected by the degree of dispersion, resulting in high production costs and uncontinuous production

However, the process of the chemical compounding method needs to adopt more expensive experimental equipment and higher reduction temperature, which has the disadvantages of high energy consumption, high production cost, and long time consumption. At the same time, the use and generation of reducing agents and reduction products It is easy to cause a series of environmental problems

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