A method for rapidly preparing graphene with microwave-assisted stirring

Abstract

The invention provides a method of fast preparing graphene through microwave assisted stirring. Graphite powder is adopted as a raw material, graphite powder and a foamer are mixed, graphite is infiltrated by the foamer and then put into a high mixing machine, high speed stirring is utilized to make graphite in a complete suspension state and a high speed motion state, meanwhile, microwave stripping is adopted to aid so that the foamer among graphite layers can fast react to generate support force, and continuous, fast, environment-friendly and clean preparation of a graphene material can be achieved. According to the method of fast preparing graphene through microwave assisted stirring, the technical effect of continuous, clean and environment-friendly production of graphene is achieved, and industrialized production of graphene dry powder is promoted; further, cutting and stripping are completed through one step in the high mixing machine, graphene is scattered evenly, not only is the layer structure of graphene maintained to the greatest extent, but also the graphene material can be prepared continuously and stably, surface integrity and topological symmetry of graphene are not destroyed, and the quality of graphene finished products is ensured further.

Description

technical field [0001] The invention relates to the field of nanomaterial processing, in particular to a method for rapidly preparing graphene with microwave-assisted stirring. Background technique [0002] Graphene is a planar carbon nanomaterial composed of a layer of carbon atoms. It is the thinnest known two-dimensional material, with a thickness of only 0.335nm. It is composed of a hexagonal lattice. The carbon atoms in graphene are connected by σ bonds, endowing graphene with extremely excellent mechanical properties and structural rigidity. Moreover, in graphene, each carbon atom has an unbonded p-electron. These p-electrons can move freely in the crystal, and the speed of movement is as high as 1 / 300 of the speed of light, which endows graphene with good conductivity. Optically, graphene is almost completely transparent, absorbing only 2.3 percent of light. Graphene has unique mechanical, optical and electrical properties, and graphene has very broad development pr...

AI Technical Summary

Problems solved by technology

Although the dispersant is water-soluble, there are still naphthalene tetracarboxylic dianhydride units, the raw material is expensive, and the cost is still high

[0008] To sum up, the exfoliation efficiency of graphene powder prepared by mechanical exfoliation method is low, and the dust pollution in the production process is serious, and the continuous production of graphene cannot be realized.

If a strong oxidant is used to pretreat graphite, polar groups will be grafted on the surface of the prepared graphene, which will endanger human health and cause environmental pollution, destroy the lattice integrity of graphene, and reduce the electrical conductivity of the system.