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Batch preparation method of graphene

A graphene, batch technology, applied in the field of batch preparation of graphene, can solve the problems of equipment corrosion, reduce the service life of equipment, and graphene is prone to defects, etc., and achieve the effect of good friction performance

Inactive Publication Date: 2016-08-24
戴加龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of chemical substance intercalation process consumes a lot of acid, and there are harmful gases such as SOx and NOx or pollution of heavy metal ions in the production process. There are sulfur residues in the product, and the final graphene is prone to defects, and it is harmful to equipment during application. There is corrosion, which reduces the service life of the equipment and increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present invention is a batch preparation method of graphene. The method includes the following steps:

[0024] S1. Inject the graphite flakes with a purity of 98% or more and a particle size of 30~500μm and the stripping liquid into the kettle with agitator, start the motor of the kettle and stir to make the materials evenly mixed. The composition of the peeling liquid is water 100 parts by weight, 1 part by weight of sodium naphthalenesulfonate, and 1 part by weight of silicon carbide. The particle size of silicon carbide powder does not exceed 10 microns. Here, the weight ratio of the graphite flakes and the peeling liquid is 1:6.

[0025] S2. Heat the kettle body, keep the temperature inside the kettle body at 50°C, the pressure at 1atm, the rotation speed of the stirring shaft at 2000rpm / min, and the reaction time for 3h.

[0026] S3. After the reaction is stopped, the upper suspension is discharged into the storage tank through the discharge port, and the initial pr...

Embodiment 2

[0030] The present invention is a batch preparation method of graphene. The method includes the following steps:

[0031] S1. Inject the graphite flakes with a purity of over 98% and a particle size of 30-500μm and the stripping liquid into a kettle with a stirrer, and start the motor of the kettle body to stir to make the materials evenly mixed. The composition of the peeling liquid is: 100 parts by weight of water, 10 parts by weight of lithium naphthalenesulfonate, and 1.5 parts by weight of silicon carbide. The particle size of silicon carbide powder does not exceed 10 microns. Here, the weight ratio of the graphite flakes and the peeling liquid is 1:5.

[0032] S2. Heat the kettle body, keep the temperature inside the kettle body at 100°C, the pressure at 3atm, the rotation speed of the stirring shaft at 1000rpm / min, and the reaction time for 6h.

[0033] S3. After the reaction is stopped, the upper suspension is discharged into the storage tank through the discharge port, and...

Embodiment 3

[0037] The present invention is a batch preparation method of graphene. The method includes the following steps:

[0038] S1. Inject the graphite flakes with a purity of over 98% and a particle size of 30-500μm and the stripping liquid into a kettle with a stirrer, and start the motor of the kettle body to stir to make the materials evenly mixed. The composition of the peeling liquid is: 100 parts by weight of water, 5 parts by weight of sodium naphthalenesulfonate, and 2 parts by weight of silicon carbide. The particle size of silicon carbide powder does not exceed 10 microns. Here, the weight ratio of the graphite flakes and the peeling liquid is 1:4.

[0039] S2. Heat the kettle body, keep the temperature inside the kettle body at 120°C, the pressure at 2atm, the rotation speed of the stirring shaft at 1500rpm / min, and the reaction time for 5h.

[0040] S3. After the reaction is stopped, the upper suspension is discharged into the storage tank through the discharge port, and the...

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Abstract

The invention discloses a batch preparation method of graphene. The method comprises the following steps: (S1) injecting graphite flakes and striping liquid into a kettle body with a stirrer, and starting a motor of the kettle body for stirring to uniformly mix the materials, wherein the striping liquid comprises the following components: 100 parts of water, 1-10 parts of naphthalenesulfonate and 1-3 parts of grinding agent; (S2) heating the kettle body and keeping the temperature in the kettle body at 50-150 DEG C, the pressure at 1-3 atm and the stirring shaft speed at 1000-2000rpm / min, wherein the reaction time is 3-6h; (S3) after the reaction stops, discharging the upper-layer suspension into a storage tank and standing; (S4) conveying the graphene suspension into a centrifuge for centrifugation; and after the centrifugation, fetching the supernate and performing vacuum filtration to obtain a filter cake; and (S5) washing the filter cake and performing freeze drying. In the preparation method, the graphene is stripped without corroding equipment or damaging the graphene structure.

Description

Technical field [0001] The invention relates to the technical field of graphene production, in particular to a batch preparation method of graphene. Background technique [0002] Graphene is a two-dimensional material with good flexibility and electrical properties. What needs to be added is that, strictly speaking, graphene is a single-layer sheet; however, due to the difficulty of preparing single-layer graphene, oligo-layer graphene with similar properties is generally also classified as graphene. Inside. [0003] Currently, graphene preparation methods mainly include: chemical growth method and physical exfoliation method. Compared with the chemical growth method, which is low in efficiency and not suitable for industrialized mass production, the physical exfoliation method mainly uses cheap graphite as the raw material, and exfoliates the graphite layers by applying mechanical force to the graphite crystals, breaking the van der Waals force between the graphite layers , To ...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 戴加龙
Owner 戴加龙
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