A kind of equipment and method for preparing graphene and graphene prepared therefrom

A graphene and graphene nanosheet technology, applied in the field of graphene, can solve the problems of high energy consumption, sewage, unenvironmental protection, etc., and achieve the effects of high product quality, reduced dust emissions, and low production costs

Active Publication Date: 2021-06-08
何其双
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses intercalation fluid, which requires microwave preheating and drying equipment. The production process has sewage, which is not environmentally friendly and consumes a lot of energy.

Method used

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  • A kind of equipment and method for preparing graphene and graphene prepared therefrom
  • A kind of equipment and method for preparing graphene and graphene prepared therefrom
  • A kind of equipment and method for preparing graphene and graphene prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Flake graphite is selected, the particle size is 200um, the first air source pressure is 0.6MPa, and the airflow velocity is 360m / S after being accelerated by the first airflow speed increaser. The particle size of the first abrasive particle is 22-36um, and the material is diamond powder; the first jet mill is a flat jet mill, and the speed of the first classifier is 4000r / min to generate scaly graphene nanosheets with a thickness of 400- 500 nm.

[0070] Select the above-mentioned flake graphene nanosheets, adjust the pressure of the second air source to 0.6MPa, after the speed is increased by the second air speed increaser, the air flow rate is 250m / S, and the second abrasive grains are selected to have a particle size of 22-36um and the material is gold steel Stone micropowder, the speed of the second classifier is 2000r / min, the number of cycles N is 2, and the single cycle time of N is 9 minutes to obtain multilayer graphene with a thickness of 20-25nm.

Embodiment 2

[0072]Flake graphite is selected, the particle size is 200um, the first air source pressure is 0.6MPa, and the airflow velocity is 360m / S after being accelerated by the first airflow speed increaser. The particle size of the first abrasive particle is 22-36um, and the material is diamond powder; the first jet mill is a flat jet mill, and the speed of the first classifier is 5000r / min to generate scaly graphene nanosheets with a thickness of 300- 400 nm.

[0073] Select the above-mentioned flake graphene nanosheets, adjust the pressure of the second air source to 0.6MPa, and after the speed is increased by the second air speed increaser, the air flow rate is 200m / S, and the second abrasive particles are selected to have a particle size of 22-36um, and the material is gold steel Stone powder, the speed of the second classifier is 2000r / min, the number of cycles N is 15, and the single cycle time of N is 6 minutes to obtain few-layer graphene with a thickness of 3-5nm.

Embodiment 3

[0075] Flake graphite is selected, the particle size is 200um, the first air source pressure is 0.6MPa, and the airflow velocity is 360m / S after being accelerated by the first airflow speed increaser. The first abrasive particle size is 22-36um, and the material is diamond powder; the first jet mill is a flat jet mill, and the first classifier rotates at a speed of 7000r / min to produce scaly graphene nanosheets with a thickness of 250- 300 nm.

[0076] Select the above-mentioned flake graphene nanosheets, adjust the pressure of the second air source to 0.6MPa, after the speed is increased by the second airflow speed increaser, the airflow velocity is 150m / S, and the second abrasive particles are selected to have a particle size of 22-36um, and the material is gold steel Stone micropowder, the speed of the second classifier is 2000r / min, the number of cycles N is 100, and the single cycle time of N is 6 minutes to obtain single-layer graphene with a thickness of 0.3-0.8nm.

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Abstract

The present invention is applicable to the technical field of graphene, and includes a first air intake unit, the first air intake unit is connected to a first airflow accelerator, the first airflow accelerator is connected to a first jet mill, and the first airflow mill is also The first feeder, the first abrasive grain bin, and the first classifier are respectively connected, and the first classifier is connected with the graphene nanosheet collection bin, and the graphene nanosheet collection bin is connected to the transition bin by a conveyor, The transition chamber is connected with a high-pressure ventilator through a second feeder, and the high-pressure ventilator is also connected with a second air intake unit, a transition collector, a second airflow accelerator, and an exhaust device; the production process of the present invention has two Production process, the first production line is to produce graphite into graphene nanosheets, and the second production line is to process graphene nanosheets into single-layer, few-layer, and multi-layer graphene. The two production lines complement each other. The adaptability of raw material graphite Strong, you can choose a variety of different types of graphite, reduce production costs.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a device and method for preparing graphene and graphene prepared therefrom. Background technique [0002] Graphene is an ultra-thin material with a single carbon atom thickness arranged in a two-dimensional honeycomb structure. In fact, graphene exists in nature, but it is difficult to peel off the single-layer structure. Graphene is stacked layer by layer to form graphite, with a layer spacing of 0.335 nanometers, and graphite with a thickness of 1 mm contains about 3 million layers of graphene. Graphene has rich physical properties, with a specific surface area of ​​2600m2 / g; excellent mechanical properties, breaking strength up to 42N / m, tensile strength and elastic modulus of 130GPa and 1.0TPa respectively, and elastic extension up to 20%; thermal conductivity Well, it is as high as 5300W / (m·K) at room temperature; the transparency is high, and the light absorption rate is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
CPCC01B2204/02C01B2204/04C01B32/19
Inventor 何其双何意灵
Owner 何其双
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