Functional modification method for graphene oxide

Abstract

The invention relates to a functional modification method for graphene oxide. The method comprises the steps that on the basis of design of a modified functional group suitable for graphene oxide grafting, a proper modifier is selected according to the designed modified functional group, a chemical reaction is conducted in a solvent through the modifier and graphene oxide, the modified functional group is grafted onto the surface or edge of graphene oxide, and modified graphene oxide is obtained. According to the functional modification method for graphene oxide, a liquid chemical method is adopted, functional modification is conducted on graphene oxide, the functional group is grafted onto the surface or edge of graphene oxide, loading and coating treatment can be conducted on different target particles in late stage conveniently, a novel functional material can be formed by conducting chemical copolymerization and composition with a high polymer material, and the method is suitable for coating and loading and functional composition with the high polymer material.

Description

technical field [0001] The invention relates to a method for functional modification of graphene oxide, which is suitable for coating, loading and functional compounding with polymer materials. Background technique [0002] Since Andre Geim and Konstantin Novoselov of the University of Manchester successfully synthesized graphene in 2004, the research on graphene has not only stayed in theory, but also carried out a lot of research. application development. As the thinnest two-dimensional single-layer material, the thickness of graphene is only 0.335nm, and the carbon atoms form a hexagon similar to benzene rings, and can extend infinitely on a plane. [0003] At present, there are four common graphene synthesis methods, among which the oxidation-reduction method that has achieved large-scale production is simple in process, low in cost and high in yield. When preparing graphene by redox method, graphene oxide is an important intermediate product, which has some basic char...

AI Technical Summary

Problems solved by technology

Although graphene has a large specific surface area and high catalytic activity, due to its poor hydrophilicity and lipophilicity, it is not suitable for liquid-phase loading and coating of particles, or it is difficult to directly perform functional compounding with polymer materials.

The surface of graphene oxide contains some oxygen-rich functional groups (mainly hydroxyl and carboxyl), so it can be dissolved in water and is suitable for in-situ loading or coating of micro-nano inert metals (semimetals), but for some water-reactive The loading and coating treatment of active metals, especially nano-sized active metals (semi-metals), is more difficult, and the functional composite effect with polymer materials is not ideal.

It has been reported that most of the research is to add graphene oxide into the metal salt solution, load metal salt on the surface of graphene oxide through chemical reaction, and then obtain graphene-loaded nano-metal particles by high-temperature sintering in a reducing atmosphere. The biggest problem is that the high-temperature sintering process may have an impact on the stability of the active metal, and often the active metal supported by graphene cannot be obtained.

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