Process and device for preparing graphene precursor two-dimension nanoscale graphite powder by adopting airflow crushing and peeling method

A two-dimensional nano, jet mill technology, used in grain processing and other directions

Active Publication Date: 2014-08-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since its discovery, graphene has become one of the hotspots of material research in recent years due to its unique properties. It has shown great application prospects in new materials, new energy, electronics and other fields, but its output and price have always been limitations. The bottleneck of its industrial application

Method used

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  • Process and device for preparing graphene precursor two-dimension nanoscale graphite powder by adopting airflow crushing and peeling method
  • Process and device for preparing graphene precursor two-dimension nanoscale graphite powder by adopting airflow crushing and peeling method
  • Process and device for preparing graphene precursor two-dimension nanoscale graphite powder by adopting airflow crushing and peeling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Example 1 Preparation of 85nm-thick two-dimensional nano-flaky graphite powder

[0077] The target component is flake graphite powder, which is 300 mesh flake graphite powder produced by Nanjing Xianfeng Nano Material Technology Co., Ltd.

[0078] Adopting preparation technology and preparation device of the present invention to carry out pulverizing and exfoliating steps to graphite particle has:

[0079] The first step: the flake graphite powder particles are placed in the crushing and peeling chamber 106, and the amount of the flake graphite powder particles placed is 750 grams;

[0080] Second step: after drying the high-pressure gas (pressure 0.8 MPa) produced by the air compressor 201 in the drier 202, output the dry high-pressure gas; the output temperature is the dry high-pressure gas of 22 degrees;

[0081] The third step: cyclic continuous crushing and exfoliation of graphite particles

[0082] The A bleed pipe 104, B bleed pipe 105, and C bleed pipe 107 ...

Embodiment 2

[0085] Example 2 Preparation of 60nm-thick two-dimensional nano-flake graphite powder

[0086] The target component is flake graphite powder, which is 300 mesh flake graphite powder produced by Nanjing Xianfeng Nano Material Technology Co., Ltd.

[0087] Adopting preparation technology and preparation device of the present invention to carry out pulverizing and exfoliating steps to graphite particle has:

[0088] The first step: the flake graphite particles are placed in the crushing and peeling chamber 106, and the amount of flake graphite particles placed is 750 grams;

[0089] Second step: after drying the high-pressure gas (pressure 0.8 MPa) produced by the air compressor 201 in the drier 202, output the dry high-pressure gas; the output temperature is the dry high-pressure gas of 60 degrees;

[0090] The third step: cyclic continuous crushing and exfoliation of graphite particles

[0091] The A bleed pipe 104, B bleed pipe 105, and lower nozzle 106A of the crushing a...

Embodiment 3

[0092] Example 3 Add tetraisopropyl bis(dioctyl phosphite) titanate coupling agent (NDZ-401) to prepare 75 nm thick two-dimensional nano-sheet graphite powder

[0093] The target component is flake graphite powder, which is 300 mesh flake graphite powder produced by Nanjing Xianfeng Nano Material Technology Co., Ltd.

[0094] The ratio of flake graphite powder to tetraisopropyl bis(dioctyl phosphite) titanate coupling agent (NDZ-401) is 98:2;

[0095] Stir at 2900 rpm for 30 minutes on a high-speed mixer to obtain a mixed premix; Zhangjiagang Qiangqiang Plastic Machinery Co., Ltd., SHR-5A high-speed mixer.

[0096] Then the mixed premix was treated with the same crushing and exfoliating steps as in Example 1 for 2 hours, and the lateral size of the exfoliated flake graphite powder was 1-5 microns, and the thickness of the particles was about 73 nanometers.

[0097] The present invention utilizes the improved jet crushing and stripping device to process the graphene precurs...

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Abstract

The invention discloses a method and a device for preparing graphene precursor two-dimension nanoscale graphite powder by adopting an airflow crushing and peeling method. The device comprises an air source system, a crushing and peeling system and a gas-solid separation system; in the crushing and peeling system, an A return pipe, a B return pipe and a riser pipe form a material circulation loop of an airflow crushing and peeling process; an A gas guide pipe, a B gas guide pipe and a C gas guide pipe form an airflow crushing passage of the airflow crushing and peeling process. The graphene precursor two-dimension nanoscale graphite powder is prepared by adopting three supersonic speed jet flows to carry graphite particles together; through collision and friction of strip jet flows, high-purity crushing and peeling of the graphite particles are realized; through circulated and continuous crushing and peeling of the graphite particles, the two-dimension nanoscale graphite powder is obtained. The process is adopted for crushing and peeling the graphite powder, the crushing and peeling of the graphite powder are realized by utilizing mutual collision and friction among the graphite powder, friction of other media does not exist, and thus the two-dimension nanoscale graphite powder with high purity can be obtained.

Description

technical field [0001] The present invention relates to a preparation process and device for pulverization and exfoliation of two-dimensional nanomaterials, more particularly, refers to a process and device for preparing graphene precursor two-dimensional nano-graphite powder by means of air circulation and continuous pulverization and exfoliation. Background technique [0002] The shape of the powder has a very close relationship with its application performance. Due to its special two-dimensional planar structure, flake powder has good adhesion, special shielding effect and good optical properties, and is widely used in the field of pigments and coatings. For the flaky powder with a thickness less than 100nm, its lateral dimension is in the order of microns. Such a structure makes it have the function of nano-powder while maintaining the performance of micro-powder for easy dispersion. Therefore, flake-like two-dimensional nano-graphite powder has attracted extensive atte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/06
Inventor 蔡楚江袁骏鹏滕思聪沈志刚赵小虎麻树林张晓静
Owner BEIHANG UNIV
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