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Method for preparing graphene by stripping flake graphite with liquid rubbers

A technology for exfoliating graphene and flake graphite, which is applied in the direction of graphene, single-layer graphene, chemical instruments and methods, etc., can solve the problems of failing to obtain graphene, achieve small footprint, low equipment investment, and low price Effect

Active Publication Date: 2019-09-20
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And ZL 201610875268 uses exfoliated graphene as an intermediate product to prepare composite materials. They use an internal mixer to react hydrogenated nitrile rubber with expanded graphite, dienes or dienophiles. Diels-Alder reaction, so that the chemically modified Expanded graphite was exfoliated in situ, and graphene / rubber nanocomposites with good electrical and thermal conductivity were prepared in situ, but graphene could not be obtained

Method used

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  • Method for preparing graphene by stripping flake graphite with liquid rubbers
  • Method for preparing graphene by stripping flake graphite with liquid rubbers
  • Method for preparing graphene by stripping flake graphite with liquid rubbers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Infiltration of flake graphite

[0044] In the high mixer, add 100g of flake graphite with a particle size of less than 0.5mm, add 10.5ml of a mixture of 10ml of isopropanol and 0.5ml of castor oil, stir for 30 minutes, take it out and dry it, and get the surface wetted by castor oil Modified flake graphite;

[0045] (2) Liquid EPDM rubber and liquid hydrogenated nitrile rubber infiltrate modified flake graphite slurry

[0046] Add 50g of liquid EPDM rubber and 50g of hydrogenated nitrile rubber into the mixing tank, add 50g of castor oil modified flake graphite powder sample, 25mL of banana water and 15ml of engine oil, and stir for 30min at the mixer speed of 800rpm to form a uniform Liquid EPDM rubber and liquid hydrogenated nitrile rubber impregnated flake graphite viscous slurry;

[0047] (3) Preparation of graphene composite latex by exfoliating modified flake graphite from liquid EPDM rubber and liquid hydrogenated nitrile rubber

[0048] The viscous slurr...

Embodiment 2

[0055] (1) Infiltration of flake graphite

[0056] In the high-mixer, add 100g of flake graphite with a particle size of less than 2.0mm, add 25ml of a mixture of 20ml of absolute ethanol and 5ml of rapeseed oil, stir for 5 minutes, take it out and dry it, and obtain a surface moistened with rapeseed oil. Wet modified flake graphite;

[0057] (2) Liquid natural rubber impregnated with modified flake graphite

[0058] Add 100g of liquid natural rubber into the mixing tank, add 1.0g of modified flake graphite powder sample wetted by rapeseed oil, 10mL of kerosene, and stir for 10min at the mixer speed of 100rpm to form a uniform liquid natural rubber infiltrated modified flake Graphite viscous slurry;

[0059] (3) Preparation of graphene composite latex by exfoliating modified flake graphite from liquid natural rubber

[0060] Pour the liquid natural rubber infiltrated modified flake graphite viscous slurry into the feed of the disc refiner in the above step (2), start the eq...

Embodiment 3

[0067] (1) Infiltration of flake graphite

[0068] In the high mixer, add 100g of flake graphite with a particle size of less than 5mm, add 12.5ml of a mixture of 10ml of absolute ethanol and 2.5ml of dioctyl terephthalate, stir for 20min, take it out and dry it, and get the surface Flake graphite modified with dioctyl terephthalate;

[0069] (2) Liquid neoprene infiltration modified flake graphite slurry

[0070] 100g liquid neoprene is added in the mixing tank, add modified flake graphite powder sample 70g, 25mL machine oil, under the condition of mixer rotating speed 500rpm, stir 20min, form the viscous slurry that uniform liquid neoprene soaks flake graphite;( 3) Preparation of graphene latex by exfoliating flake graphite from liquid neoprene rubber

[0071] Pour the liquid neoprene infiltrated modified flake graphite viscous slurry into the hopper of the colloid mill in the above step (2), start the equipment, adjust the rotating speed at 1000rpm, and peel off 100min in...

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Abstract

The invention relates to a method for preparing graphene by stripping flake graphite with liquid rubbers. According to the method, different kinds of liquid rubbers are mixed with the flake graphite, through the mechanical shear force of grinding equipment such as a disc mill, a colloid mill, a stripper and a vibration mill and by combining with wetting agent which can strengthen and wet the surface of the flake graphite, the flake graphite can be rapidly stripped into graphene rubber latex in a single-layer or few-layer structure. The method can help obtain graphene compounded latex blocks containing higher than 30% of graphene, and during application, strong acids, strong bases, strong oxidants and toxic substances are avoided, so that the demands on green and healthful development of environment and economy can be met.

Description

technical field [0001] The invention relates to a method for preparing high-quality graphene by using mechanical shear force and friction to drive liquid rubber molecules to flexibly peel off flake graphite crystals, and belongs to the field of new nanometer material preparation. Background technique [0002] Graphene is a single layer of hexagonal honeycomb structure formed by connecting carbon atoms with sp2 hybrid orbitals, and a planar crystallized film composed of 2-10 layers of few layers of carbon atoms. The theoretical thickness of single-layer graphene is only 0.35nm, and the specific surface area is 2.63×10 3 m 2 / g, the Young's modulus is as high as ~1.0TPa, and the strength is 130GPa, which is 100 times that of steel, and it is the material with the highest strength known. The thermal conductivity of graphene reaches ~5000W / mK, the light transmittance is as high as ~97.7%, and the electron mobility is 2×10 5 cm 2 / vs. Graphene's unique 2D structure, excellen...

Claims

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Application Information

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IPC IPC(8): C01B32/19C01B32/196
CPCC01B32/19C01B32/196C01B2204/32C01B2204/02C01B2204/04
Inventor 汤庆国黄彬梁秀红梁金生
Owner HEBEI UNIV OF TECH
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