Modified graphene oxide polymer composite material and preparation method thereof

Abstract

The invention provides a modified graphene oxide polymer composite material and a preparation method thereof. The method comprises the following steps: on the basis of graphene oxide prepared by a pyrolysis expansion process, dispersing the graphene oxide in an organic solvent, grafting a double-bond-containing acrylate chain segment by utilizing hydroxy, carboxy and other active functional groups on the graphene oxide, compounding the modified graphene oxide, an acrylic resin, a reactive diluent, a filler, a photoinitiator and the like to obtain a composite, coating, baking to remove the solvent, and curing under the irradiation of a high-pressure ultraviolet mercury lamp, thereby obtaining the modified graphene oxide polymer composite material. The composite material is mixed in the liquid state; the graphene oxide is modified by the acrylate chain segment, and thus, has favorable compatibility with other resins and the like, so that the graphene oxide can be uniformly dispersed in the polymer material; and after uniform mixing, the polymer material is quickly cured under ultraviolet light to obtain the solid-state modified graphene oxide polymer composite material.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for better dispersion or blending of graphite flakes into plastics without requiring drying processes like sintering. It improves the quality of the final product by adding special chemical groups on its surface instead of just create tiny particles called pristine graphene (PG) flake itself. By doing this, these modifications enhance their properties such as electrical conductivity, mechanical strength, thermal insulation, etc., resulting in improved overall characteristics over traditional methods used alone.

Problems solved by technology

This patented describes various ways to make graphene quantum dots (graphen nanosheets), including physical adhesion techniques like attaching metal particles onto surfaces of graphenes. Chemical modifications made via radical addition reactions allow graphene layers to stick together easily without forming bonds during processing. Additionally, they may contain unreactable components called residual elements due to poor dispersibility when dissolved in aqueous solutions. By combining different types of modifying agents, we could create composites containing both graphene monolayer and graphene multiwall networks.