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Graphene, preparation method thereof and micro-jet device

A micro-jet, graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as blockage, rupture, valve core wear, etc., to achieve the effect of simple process, low heat generation, and easy damage improvement

Active Publication Date: 2017-05-17
贵州瑞诚新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When processing materials with high hardness in the environment of ultra-high pressure and ultra-high-speed jet flow, the valve core is severely worn or even broken, and needs to be replaced repeatedly; in addition, the existing valve seat usually adopts a needle-shaped injection channel, which is in the When processing materials with large particle sizes, it is often prone to clogging problems

Method used

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  • Graphene, preparation method thereof and micro-jet device

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preparation example Construction

[0058] According to another aspect of the present invention, also provide a kind of preparation method of graphene, adopt above-mentioned micro-fluidic equipment to comprise the steps:

[0059] (1) graphite, dispersant, thickener and optional metal complexing agent are mixed, and the graphite dispersion is obtained after stirring;

[0060] (2) Move the graphite dispersion to the feeding chamber of the micro-fluidic equipment. Under the action of the piston, the graphite dispersion in the feeding chamber passes through the slit channel on the valve seat and the gap between the valve core and the valve seat. The annular gap enters the reaction chamber, and after several times of micro-jet circulation, the graphene solution is obtained;

[0061] (3) The graphene precipitation obtained after the graphene solution is centrifuged is dried to obtain graphene.

[0062] The invention provides a method for preparing graphene. The preparation method has simple process, convenient operat...

Embodiment 1

[0090] The invention provides a kind of preparation method of graphene, comprises the steps:

[0091] (1) Mix graphite, ethanol, water, polyethylene glycol and sodium polyacrylate at 60° C., and stir to obtain a graphite dispersion;

[0092] Wherein, according to weight fraction, graphite accounts for 1% by weight of raw materials, polyethylene glycol accounts for 1% by weight of raw materials, sodium polyacrylate accounts for 0.3% by weight of raw materials, and ethanol accounts for 2% by weight of raw materials. %, water to make up the balance to 100%.

[0093] (2) The graphite dispersion was moved to the micro-fluidic equipment, and after being circulated once at 160MPa micro-jet, a graphene solution was obtained.

[0094] (3) Precipitate the graphene obtained after the graphene solution is centrifuged, and dry to obtain graphene.

Embodiment 2

[0096] The invention provides a kind of preparation method of graphene, comprises the steps:

[0097] (1) Mix graphite, ethanol, water, polyethylene glycol and sodium polyacrylate at 60° C., and stir to obtain a graphite dispersion;

[0098] Wherein, according to weight fraction, graphite accounts for 1% by weight of raw materials, polyethylene glycol accounts for 1% by weight of raw materials, sodium polyacrylate accounts for 0.3% by weight of raw materials, and ethanol accounts for 2% by weight of raw materials. %, water to make up the balance to 100%.

[0099] (2) The graphite dispersion was moved to the micro-jet equipment, and after 3 times of 160MPa micro-jet circulation treatment, the graphene solution was obtained.

[0100] (3) Precipitate the graphene obtained after the graphene solution is centrifuged, and dry to obtain graphene.

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Abstract

The invention provides a graphene, a preparation method thereof and a micro-jet device and relates to the technical field of a nanometer carbon material. The micro-jet device provided by the invention can adjust a throttling area by changing an annular clearance between a valve element and a valve base under the synergic effect of the valve element and the valve base under high pressure, so as to generate a high-speed jet and realize the peeling, smashing, shearing and refining for a graphene sheet, wherein the valve element is made from a diamond material, so that the powder in higher hardness can be prepared while the defects of incapability of resisting abrasion, easiness in damage and frequent replacement of the traditional element can be overcome, and meanwhile, a slit type channel is arranged on the valve base so as to allow the graphene in larger grain size to pass, so that the technical problem of easiness in blocking of a traditional needle-shaped jet orifice can be solved. The invention also provides the preparation method for the graphene. The micro-jet device is applied to the preparation method. The process is simple, the operation is convenient, the energy consumption is low, no waste gas or wastewater is generated, the method is safe and environmentally friendly and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of nano-carbon materials, in particular to a graphene, a preparation method thereof, and a micro-fluidic device. Background technique [0002] Due to their unique microstructure, nanomaterials exhibit a series of effects different from traditional materials, such as volume effect, surface effect, quantum size effect, quantum tunneling effect, and dielectric confinement effect. Many physical and chemical aspects such as melting point, vapor pressure, optical properties, chemical reactivity, magnetism, superconductivity and plastic deformation show special properties. At present, the preparation, characterization and application of nanomaterials have become research hotspots. Graphene, as an important branch of nanomaterials, is a new type of material that has attracted much attention from various countries in recent years. [0003] At present, the preparation methods of graphene mainly include mechanical ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19B02C19/06
CPCB02C19/06C01B2204/30C01B2204/32C01P2004/03
Inventor 韦勇
Owner 贵州瑞诚新材料技术有限公司
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