A jet device and method for continuously preparing graphene

Abstract

The invention provides a jet device for continuous preparation of graphene and a method thereof. The method includes: mixing a graphite raw material with a medium solution, passing the mixture through a main nozzle for accelerated ejection, impacting and stripping the material with high speed air flow ejected by uniformly distributed convergence nozzles so as to obtain a mixed slurry, finally pumping the mixed slurry into a spray drying chamber by a super high pressure pump, conducting drying treatment to obtain a graphene material, and collecting graphene with a collecting mechanism. The method has low energy consumption, improves the graphene stripping efficiency, employs air flow and liquid flow to strip graphite, and does not introduce grinding medium pollution. The stripped material passes through a homogenizing valve with tiny gap at a high speed, and the generated strong shear force and friction force can homogenize and strip the material. Through further shearing and screening by the homogenizing valve, the graphene stripping efficiency is improved, and at the same time liquid is added in the graphite shear process to serve as the medium, the structure of graphene can be well maintained, thus obtaining high quality graphene, and promoting the mass production of graphene.

Description

Technical field [0001] The invention relates to the field of nano material preparation, in particular to a jet device and a method for continuously preparing graphene. Background technique [0002] In 2004, two scientists at the University of Manchester in the United Kingdom discovered graphene using a micromechanical exfoliation method, and won the Nobel Prize in Physics in 2010. Graphene is a single atomic thickness and has sp 2 The plate structure of bonded carbon atoms theoretically has a perfect hexagonal network structure, showing excellent electronic stability, thermal conductivity, optical properties, mechanical properties, etc. Since the discovery of graphene, due to its excellent performance and huge market application prospects, it has triggered a research boom in the fields of physics and materials science. At present, the preparation methods of graphene include mechanical exfoliation, epitaxial growth, redox, organic synthesis, solvothermal, chemical vapor depositio...

AI Technical Summary

Problems solved by technology

[0007] In view of the high energy consumption of ultrafine jet pulverization, the difficulty of pulverizing to micron and nanoscale, the contamination of grinding media, the difficulty of obtaining high-quality and high-purity ultrafine graphene powder, the discontinuous process, and the long production cycle, etc.

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