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A method for preparing graphene microchips and graphene microchips by setting a rotating screw in a vibrating mill

A technology of graphene microchips and vibrating mills, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of complex process, damaged application performance, high production cost, etc., and achieve simple preparation process and single treatment The effect of large amount and efficient preparation

Active Publication Date: 2018-05-04
广西鑫锋电源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned prior art has obtained graphene mechanically, but the process of obtaining graphene by shearing is relatively complicated, the equipment is too specific, and the production cost is high, while the process of obtaining graphene by grinding is relatively simple, but in It is easy to severely damage the crystal structure of graphene during grinding, resulting in structural defects, which further leads to damage to application performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) After mixing graphite powder with a mass ratio of 100:5 and dry ice with a particle size of 1mm, add it to a vertical single-cylinder vibrating mill. The amplitude of the vibrating mill is 10-15mm, and the volume of the grinding cylinder is 10L without grinding media. The power of the motor fixed on the grinding cylinder cover is 0.5kw, and the screw rod with a length of 15cm extends into the grinding cylinder. The thread length is 10cm, which is a single-head triangular gradual thread. , is 20mm, the depth of the screw groove at the upper end is the smallest, which is 5mm, and the thread pitch is 5mm;

[0032] (2) After graphite powder and dry ice are added, put the cover on the grinding cylinder, turn on the vibrating mill and run for 5 minutes, turn on the power of the motor above the screw, turn on the screw to rotate at a high speed, the speed is 1000rpm, when the vibrating mill and the screw run together for 1 hour Finally, stop, open the grinding cylinder, co...

Embodiment 2

[0036] (1) After mixing graphite powder with a mass ratio of 100:5 and dry ice with a particle size of 1mm, add it to a vertical single-cylinder vibrating mill. The amplitude of the vibrating mill is 15-20mm, and the volume of the grinding cylinder is 20L without grinding media. The power of the motor fixed on the grinding cylinder cover is 0.75kw, and the screw rod with a length of 30cm extends into the grinding cylinder. The thread length is 25cm, and it is a single-head triangular gradual thread. , is 20mm, the depth of the screw groove at the upper end is the smallest, which is 5mm, and the thread pitch is 5mm;

[0037](2) After adding graphite powder and dry ice, put the cover on the grinding cylinder, turn on the vibrating mill and run it for 10 minutes, then turn on the power of the motor above the screw, turn on the screw to rotate at a high speed at 1200rpm, when the vibrating mill and the screw run together for 1.5 Stop after h, open the grinding drum, collect exhaus...

Embodiment 3

[0041] (1) After mixing graphite powder with a mass ratio of 100:8 and dry ice with a particle size of 5mm, add it to a vertical double-barrel vibrating mill. The amplitude of the vibrating mill is 20~30mm, and the volume of each mill barrel is 25L. Each grinding cylinder is equipped with a screw and a screw motor. There is no grinding medium in the vibration mill. The power of the motor fixed on the grinding cylinder cover is 0.7kw. The screw rod with a length of 35cm extends into the grinding cylinder, and its thread length is 30cm. Head triangular gradient thread, the bottom end of the thread, that is, the end near the bottom of the grinding cylinder, has the deepest screw groove of 30mm, the upper end of which has the smallest screw groove depth of 10mm, and the thread pitch is 10mm;

[0042] (2) After adding graphite powder and dry ice, put the cover on the grinding cylinder, turn on the vibrating mill and run it for 10 minutes, then turn on the power of the motor above th...

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Abstract

The invention provides a method for manufacturing graphene nanoplatelets by arranging a rotary screw rod in a vibrating mill and the graphene nanoplatelet. A graphene raw material and dry ice are added into a milling barrel of the vertical vibrating mill with the screw rod, and the graphene raw material can be cut into the graphene nanoplatelet with complete crystal lattices under the synergistic effect of vibration of the vibrating mill, shearing of the screw rod, and gas. Due to the fact that no grinding medium exists in the vibrating mill, the situation that the crystalline structure of graphite is damaged due to repeated grinding on the graphite is avoided, and the graphene nanoplatelet with the complete crystal lattices can be obtained. Meanwhile, the preparation process is simple, the processing capacity each time is high, and the graphene nanoplatelet can be prepared efficiently.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to the technical field of preparing graphene through a mechanical method. In particular, it relates to a method for preparing graphene microchips by setting a rotating screw in a vibrating mill and the graphene microchips. Background technique [0002] Graphene is a planar atomic crystal structure in which carbon atoms are closely arranged in a honeycomb shape in regular hexagons. The unique planar structure of graphene makes it possess many characteristics that three-dimensional crystals do not have, such as a specific surface area as high as 2.6×10³m² / g , the thermal conductivity is as high as 3×10³W / (m.K), the mechanical properties are 1.06×10³Gpa, the Young’s modulus is 1.0TPa, and its mechanical strength is as high as 130Gpa, which is more than 100 times that of steel. Graphene has a stable regular hexagonal lattice structure so that it has excellent electrical conductivity, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
CPCC01B2204/32
Inventor 陈庆曾军堂王镭迪
Owner 广西鑫锋电源科技有限公司
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