A method for preparing functionalized graphene by ball milling

Abstract

The invention discloses a method for preparing functionalized graphene through ball milling. According to the method, graphite, organic molecules containing anilino groups and isoamyl nitrite are used as raw materials and subjected to ball milling so as to prepare graphene covalently modified by organic molecules. The method for preparing the functionalized graphene in the invention has the advantages that the functionalized graphene is prepared from graphite through one-step reaction, so preparation process is simple; different organic molecules containing anilino groups can be used so as to realize surface functionalization of graphene; different organic molecules and graphene are connected via covalent bonds, so graphene has good dispersibility in different systems (water, organic solvents and matrix materials); and the method is simple to operate, low in cost, high in efficiency, free of pollution and capable of realizing large-scale preparation. The functionalized graphene prepared by using the one-step method has good dispersibility, which is beneficial for processing of the functionalized graphene in a solvent, and has wide application prospects in the fields of optoelectronic devices, new energy sources and new materials.

Description

technical field [0001] The invention relates to the field of graphene preparation. More specifically, it relates to a method for preparing functionalized graphene by ball milling. Background technique [0002] Graphene is a new generation of carbon material with a two-dimensional honeycomb structure formed by a single layer of carbon atoms tightly packed. The special structure of graphene endows it with excellent electrical properties, outstanding thermal conductivity, high specific surface area and good mechanical properties. It has potential application prospects in many fields such as composite materials, energy environment, biomedicine, and microelectronics. When graphene was discovered in 2004, it aroused great interest and widespread concern in the scientific community, and in just a few years it has become an emerging research hotspot in many disciplines such as physics, chemistry, and materials science. [0003] So far, a variety of graphene preparation methods hav...

AI Technical Summary

Problems solved by technology

Due to the strong interaction between the carbon layers in graphite, a large amount of toxic and strong oxidants are required for solution exfoliation, and the subsequent pickling and water washing steps are also time-consuming and laborious, and the synthesis process is extremely tedious and complicated.

Therefore, there are still some problems and deficiencies in the preparation of graphene

[0004] At the same time, due to the stable chemical properties of graphene, the interaction with other media is weak, it is difficult to dissolve in water and common organic solvents, and it is also difficult to disperse, making it difficult to process, which greatly limits its application in many fields.

Therefore, more and more attention has been paid to surface functionalized graphene materials, but there are still some technical difficulties in the functionalization of graphene, such as the simple, effective and controllable preparation method of functionalized graphene; A large number of low-cost and pollution-free preparations; the dispersion of functionalized graphene; the conductivity and processability of functionalized graphene, etc.

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