Method for producing bulky graphene

A technology of graphene and large sheets, which is applied in the field of physical exfoliation production of large sheets of graphene. It can solve the problems of reducing the service life of equipment, graphene is prone to defects, and consumes a lot of acid. It can meet the requirements of reducing the speed of ball milling and improving shear Cutting and peeling effect, the effect of improving conductivity

Inactive Publication Date: 2016-06-29
江苏碳谷二维世界科技有限公司
View PDF0 Cites 3 Cited by
  • 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 resid

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present invention is a kind of method of producing large graphene, and the method comprises the following steps:

[0027] S1. Inject the graphite flakes with a purity of more than 98% and a particle size of 30 to 500 μm and the stripping liquid into the ball mill tank, wherein the stripping liquid consists of 100 parts by weight of water, 60 parts by weight of ethanol, 50 parts by weight of polyacrylate, 1 part by weight of flake zinc powder, and 0.5 parts by weight of lithium fluoride. Among them, the number average molecular weight of the polyacrylate is greater than 100,000; the size of the flaky zinc powder is 3-10 microns. The weight ratio of graphite flakes and stripping liquid is 1:4.

[0028] S2. Ball milling for 4 hours, the rotating speed of the ball mill is 8000rpm / min.

[0029] S3. After the reaction is stopped, the suspension is discharged into the storage tank through the discharge port, and left to stand for more than 24 hours to obtain the initial ...

Embodiment 2

[0033] The present invention is a kind of method of producing large graphene, and the method comprises the following steps:

[0034] S1. The purity is more than 98%, and the particle size is 30 ~ 500 μm graphite flakes and the stripping liquid are injected into the ball mill tank, wherein the stripping liquid is composed of: 100 parts of water, 15 parts by weight of ethanol, 15 parts by weight of n-propanol, 80 parts by weight of polyurethane modified acrylate, 30 parts by weight of flaky nickel powder, and 2 parts by weight of sodium fluoride. Wherein, the number-average molecular weight of the polyurethane-modified acrylate is greater than 100,000; the size of the flaky nickel powder is 3-10 microns. The weight ratio of graphite flakes and stripping liquid is 1:3.

[0035] S2. Ball milling for 48 hours, the rotating speed of the ball mill is 2000rpm / min.

[0036] S3. After the reaction is stopped, the suspension is discharged into the storage tank through the discharge por...

Embodiment 3

[0040] The present invention is a kind of method of producing large graphene, and the method comprises the following steps:

[0041] S1. Inject the graphite flakes with a purity of more than 98% and a particle size of 30 to 500 μm and the stripping liquid into the ball mill tank, wherein the stripping liquid consists of: 100 parts of water, 30 parts by weight of n-butanol, 50 parts by weight of propylene glycol, 60 parts by weight of polyurethane modified acrylate, 20 parts by weight of flake silver powder, and 4 parts by weight of sodium chloride. Wherein, the number-average molecular weight of the polyurethane-modified acrylate is greater than 100,000; the size of the flaky silver powder is 3-10 microns. The weight ratio of graphite flakes and stripping liquid is 1:5.

[0042] S2. Ball milling for 8 hours, the rotating speed of the ball mill is 4000rpm / min.

[0043] S3. After the reaction is stopped, the suspension is discharged into the storage tank through the discharge ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for producing bulky grapheme. The method comprises the following steps: S1) injecting graphite flakes and a stripper in a ball milling jar, wherein the stripper comprises the following components: 100 parts of water, 30-100 parts of an alcohols solvent, 50-80 parts of a polyacrylate or polyacrylate derivative, 1-30 parts of flaky metal powder, and 0.5-5 parts of water-soluble salt; S2) performing ball milling on the components for 4-48 hours, wherein a rotating speed of a bowl mill is more than 2000 rpm/min; S3) stopping a reaction and discharging a fluid suspension for standing; S4) conveying the graphene fluid suspension to a centrifuge for centrifugation, after centrifugation, an upper level clear liquid is taken for vacuum-filtering to obtain a filter cake; and S5) washing the filter cake, performing freeze drying on the filter cake. The method is capable of stripping bulky graphene with high efficiency.

Description

technical field [0001] The invention relates to the technical field of graphene production, in particular to a physical exfoliation production method of large sheets 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, oligolayer graphene with similar properties is generally also classified into the category of graphene. Inside. [0003] At present, the methods for preparing graphene mainly include: chemical growth method and physical exfoliation method. Compared with the chemical growth method, which is inefficient and not suitable for industrial mass production, the physical exfoliation method mainly uses cheap graphite as a raw material, and applies mechanical force to the graphite crystal to cause the graphite layers to peel off, breaking the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B31/04
Inventor 戴加龙
Owner 江苏碳谷二维世界科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap