Laser continuous preparation method for nano graphite particles under effect of limiting layer

Abstract

The present invention provides a laser continuous preparation method for nano graphite particles under the effect of a limiting layer. The method comprises the steps of 1) placing the target material of a graphite sheet on a working table; 2) attaching a limiting layer to be above the graphite sheet; 3) focusing the pulse laser at the interface of the target material of the graphite sheet and the limiting layer and subjecting the target material of the graphite sheet to scanning, filling and ablation; 4) under the effect of the limiting layer, pushing obtained graphite particles into a liquid flow transport corridor through the impact action of laser-induced plasmas, wherein the particles are conveyed into a container by the liquid flow; 5) drying the solution in the container to obtain nano-sized graphite particles. According to the invention, no expensive equipment is adopted. Nano graphite particles, resistant to high temperature, good in electrical conductivity and thermal conductivity, excellent in lubricating property and good in chemical stability, can be obtained through the simply operated laser ablation process of inexpensive carbon raw materials under the effect of the limiting layer. Therefore, the method has a wide application prospect in related fields.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterial preparation, and in particular relates to a laser continuous preparation method of nano-graphite particles under the action of a confining layer. Background technique [0002] In recent years, nano-carbon materials have been one of the focus and hotspots of scientific research. At present, most of the major research focuses on carbon nanotubes, nano-carbon fibers and super activated carbon, while further research on nano-graphite particles remains to be done. Compared with ordinary substances, nanoparticles have many new characteristics due to their small size and large specific surface area. These new characteristics will bring great inspiration and revolutionary influence to future industrial applications and scientific research. [0003] The study found that for nano-graphite particles, it is a good solid lubricant. In addition, because nano-graphite is stable and has certain adsorp...

AI Technical Summary

Problems solved by technology

However, for the direct use of pulsed laser ablation, there are certain requirements for the laser equipment used. Generally, ultrashort pulse lasers or high-power nanosecond lasers are required, so the cost of equipment is relatively high.

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