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Device and method for peeling graphene slurry by utilizing fluid accelerated stirring

A technology for exfoliating graphene and fluids, applied in the field of graphene, can solve problems such as inability to stably disperse, be difficult to open, and difficult to mass-produce, and achieve the effects of increasing exfoliation efficiency, increasing shearing effect, and high exfoliation efficiency

Active Publication Date: 2017-03-29
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical exfoliation method in the prior art has a low yield and is only suitable for basic scientific research, but it is difficult to achieve large-scale production and industrial continuous preparation
[0010] In addition, there is a strong van der Waals interaction between graphene, which prevents it from being stably dispersed in solvents, and its compatibility with other materials is not good, and it is easy to be stacked together again and difficult to open. obstacle

Method used

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  • Device and method for peeling graphene slurry by utilizing fluid accelerated stirring
  • Device and method for peeling graphene slurry by utilizing fluid accelerated stirring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Dissolving sodium dodecyl sulfonate into pure water, the concentration of the sodium dodecyl sulfonate aqueous solution is 0.5mg / L;

[0044] (2) Add the graphite powder and the above-mentioned surfactant solution into the aforementioned reaction kettle 1, close the valve 2, and run the U-shaped stirring paddle 9 and the turbine 10 in the reaction kettle 1. The rotation direction of the two is opposite, and the speed is 8000r / min , the graphite powder is exfoliated by the strong shear force generated by the accelerated stirring of the fluid, the weight ratio of the graphite powder to the surfactant is 1:10, and the exfoliation time is 5 hours to obtain a slurry mixed with graphene and graphite particles;

[0045] (3) Open the valve 2, filter the obtained graphene slurry in a slurry filter, remove the unstripped graphite powder, and obtain the graphene slurry;

[0046] (4) Dissolving the shell material in water, the concentration of the aqueous solution of the shell m...

Embodiment 2

[0048] (1) Sodium dodecylbenzenesulfonate was dissolved in pure water, and the concentration of the sodium dodecylbenzenesulfonate aqueous solution was 2 mg / L;

[0049] (2) Add the graphite powder and the above-mentioned surfactant solution into the aforementioned reaction kettle 1, close the valve 2, and run the U-shaped stirring paddle 9 and the turbine 10 in the reaction kettle 1. The rotation direction of the two is opposite, and the speed is 5000r / min , the graphite powder is exfoliated by the strong shear force generated by the accelerated stirring of the fluid, the weight ratio of the graphite powder to the surfactant is 1:1, and the exfoliation time is 5 hours to obtain a slurry mixed with graphene and graphite particles;

[0050] (3) Open the valve 2, filter the obtained graphene slurry in a slurry filter, remove the unstripped graphite powder, and obtain the graphene slurry;

[0051] (4) Dissolving the shell material in water, the concentration of the aqueous solutio...

Embodiment 3

[0053] (1) Sodium dodecylbenzenesulfonate was dissolved in pure water, and the concentration of the sodium dodecylbenzenesulfonate aqueous solution was 5 mg / L;

[0054] (2) Add the graphite powder and the above-mentioned surfactant solution into the aforementioned reaction kettle 1, close the valve 2, and run the U-shaped stirring paddle 9 and the turbine 10 in the reaction kettle 1. The rotation direction of the two is opposite, and the speed is 8000r / min , the graphite powder is exfoliated by the strong shear force generated by the accelerated stirring of the fluid, the weight ratio of the graphite powder to the surfactant is 1:0.2, and the exfoliation time is 5 hours to obtain a slurry mixed with graphene and graphite particles;

[0055] (3) Open the valve 2, filter the obtained graphene slurry in a slurry filter, remove the unstripped graphite powder, and obtain the graphene slurry;

[0056] (4) Dissolving the shell material in water, the concentration of the shell materia...

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Abstract

The invention provides a device and a method for peeling graphene slurry by utilizing fluid accelerated stirring. The device comprises a stirring kettle, a slurry filter, a liquid storage tank and a mixing tank which are sequentially connected through pipelines; a turbine is additionally arranged at the bottom of the stirring kettle, and a relatively strong shearing effect is formed to the inner wall along with high-speed rotation of the turbine, so that the moving direction of graphite slurry is nearly parallel to the inner side wall of the stirring kettle; meanwhile, a U-shaped stirring paddle is arranged at the top end of the stirring kettle, and a shearing force is supplied to the graphite slurry by means of rotation of the U-shaped stirring paddle; the rotating direction of the turbine is opposite to that of the U-shaped stirring paddle, so that two intensively relative-moving shearing forces are provided, the graphite powder is repeatedly sheared in a parallel manner, the graphite shearing effect is improved, and the graphene can be peeled with high efficiency, the graphene laminar structure is kept to be complete, and large-scale continuous production of graphene can be realized.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a device and method for exfoliating graphene slurry by utilizing fluid accelerated stirring. Background technique [0002] Graphene is a new two-dimensional material with a single-layer sheet structure composed of carbon atoms. 2 A planar film of hexagonal honeycomb lattice composed of hybrid orbitals. This material has the characteristics of "thin and strong", excellent thermal conductor and electron mobility. Due to its unique chemical structure and geometric structure, it has broad application prospects in the fields of nanoelectronic devices, energy storage materials, catalysis, sensors, drug carriers, and functional coatings. [0003] The preparation methods of graphene include physical and chemical methods. The physical methods mainly include mechanical exfoliation method, heating silicon carbide method, epitaxial method, etc. The chemical methods mainly include chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19C01B32/194B01J19/18
CPCB01J19/0066B01J19/1806C01B2204/00
Inventor 陈庆曾军堂王镭迪
Owner CHENDU NEW KELI CHEM SCI CO LTD
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