Graphene and low-cost preparation method thereof

Abstract

The invention relates to graphene and a low-cost preparation method thereof. The low-cost preparation method comprises the following steps: carrying out ultrasonic cleaning on plastic products; then crushing the plastic product and carrying out ball milling to obtain a plastic product micro-fragment; then carbonizing and carrying out the ball milling to obtain carbonized powder with fine granularity; carrying out secondary calcination on the carbonized powder; washing, purifying and drying to finally obtain the graphene. The graphene provided by the invention takes the plastic product or dailywaste plastic products, especially polyethylene plastic, polystyrene plastic and the like, as raw materials and the graphene is prepared through a specific technological method; the prepared graphenenot only has the advantages of low cost, controllable layer number, large specific surface area and high electric conductivity, and waste plastic is used as the raw material so that the environment protection pressure is greatly reduced; the method is suitable for preparation and production of the low-cost graphene and a result can be applied to researches of conducting materials, environment protection, coating, heat dissipation structures and solid propellants.

Description

technical field [0001] The invention relates to a graphene and a low-cost preparation method thereof, belonging to the technical field of graphene preparation. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. "Cut" different shapes of sheets from graphene, warping can get zero-dimensional fullerene, curling can get one-dimensional barrel-shaped carbon nanotubes, stacking can get three-dimensional graphite, so we think graphene is The basic unit that constitutes other carbon materials is the most ideal carbon material so far. The successful preparation of two-dimensional crystal materials represented by graphene has opened up a new era of development of new nanomaterials and functional materials / devices. [0003] The unique crystal structure of graphene makes it have many unique properties, such as super large spec...

AI Technical Summary

Problems solved by technology

Micro-mechanical exfoliation method can produce micron-scale graphene, but its controllability is poor, the yield is low, and it is difficult to carry out large-scale production; the epitaxial growth method can obtain large-scale graphene by heating and epitaxial growth on the SiC (0001) crystal surface area of ​​single-layer graphene, but its growth efficiency is low, poor controllability and difficult to transfer; oxidation-reduction method is the mainstream method of industrial graphene preparation, but this method obtains more graphene defects resulting in more layers and lower quality Poor, it is difficult to apply in the electronic field; CVD method is one of the ways to obtain high-quality graphene, but its biggest problem is that it is difficult to industrialize production

Therefore, the existing main preparation technologies have problems such as high cost, low yield, long time consumption, and harsh experimental conditions.

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