Preparation method of graphene and method for static conductive graphene EPS

A graphene and static-conducting technology, applied in coatings and other directions, can solve problems such as low mechanical strength of EPS and restrict EPS, and achieve the effect of reducing production costs, reducing costs and environmental protection costs, and broadening the scope of application.

Inactive Publication Date: 2018-05-29
JILIN YUNTING ENERGY SAVING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] EPS is expandable polystyrene, which uses polystyrene resin particles to add foaming agent, and heats to soften at the same time to generate gas to form a foam with a rigid closed-cell structure. EPS is mainly used in food packaging and construction External wall insulation and other fields, but the mechanical strength of EPS products is low at present, which limits the application of EPS products. The emergence of graphene EPS is at the right time

Method used

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  • Preparation method of graphene and method for static conductive graphene EPS
  • Preparation method of graphene and method for static conductive graphene EPS
  • Preparation method of graphene and method for static conductive graphene EPS

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Oxidative intercalation of graphite: use graphite with a particle size of 800 mesh as raw material, with a purity of 99%, mix graphite with an oxidizing intercalation agent for intercalation, and the oxidizing intercalation agent system is 90% concentrated sulfuric acid, sodium nitrate, high Potassium manganate system, the mass ratio is graphite:concentrated sulfuric acid:sodium nitrate:potassium permanganate=1:1:0.1:0.5;

[0047] (2) Preparation of graphene by continuous expansion of high-frequency microwave: 915MHz high-frequency microwave is used to continuously expand intercalated graphite for 20 seconds, and the output power is controlled to 300KW. ene, specific surface area 2000m 2 / g, the thickness of the sheet is 0.33-1nm;

[0048] (3) Alcohol washing modification of graphene: mix graphene with a certain amount of ethylene glycol for 1h, the mass ratio of graphene and ethylene glycol is 1:5, filter and dry after alcohol washing modification;

[0049] (4) T...

Embodiment 2

[0053] (1) Oxidative intercalation of graphite: use graphite with a particle size of 1100 mesh as raw material, with a purity of 99.9%, mix graphite with an oxidative intercalation agent for intercalation, and the oxidative intercalation agent system is 95% concentrated sulfuric acid, potassium nitrate, high Potassium manganate system, the mass ratio is graphite:concentrated sulfuric acid:potassium nitrate:potassium permanganate=1:5:0.5:1;

[0054] (2) Preparation of graphene by high-frequency microwave continuous expansion: 915MHz high-frequency microwave continuously expands the intercalated graphite for 200S, controls and controls the output power to 200KW, and performs simple ultrasonic exfoliation after discharging to form single-layer graphite with 1-2 layers ene, specific surface area 2500m 2 / g, the thickness of the sheet is 0.33-1nm;

[0055] (3) Alcohol washing modification of graphene: mix graphene with a certain amount of polyethylene glycol 1000 (molecular weight...

Embodiment 3

[0061] (1) Oxidative intercalation of graphite: use graphite with a particle size of 1200 mesh as raw material, with a purity of 99.5%, mix graphite with an oxidative intercalation agent for intercalation, and the oxidative intercalation agent system is 98% concentrated sulfuric acid, sodium nitrate, nitric acid Potassium, potassium permanganate system, the mass ratio is graphite:concentrated sulfuric acid:sodium nitrate:potassium nitrate:potassium permanganate=1:3:0.1:0.2:0.7;

[0062] (2) Preparation of graphene by high-frequency microwave continuous expansion: 915MHz high-frequency microwave continuously expands the intercalated graphite for 130S, controls and controls the output power to 250KW, and performs simple ultrasonic exfoliation after discharging into single-layer graphite with 1-2 layers ene, specific surface area 2200m 2 / g, the thickness of the sheet is 0.33-1nm;

[0063] (3) Alcohol washing modification of graphene: mix graphene with a certain amount of ethyle...

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Abstract

The invention relates to a preparation method of graphene and a method for static conductive graphene EPS. The preparation method comprises the following steps: carrying out intercalation on graphiteby using an oxidized intercalation agent, carrying out high-frequency microwave continuous puffing and ultrasonic exfoliation on the intercalated graphite to prepare single-layer graphene, modifying the graphene, and then polymerizing the modified graphene with styrene monomer, so that a prepared graphene EPS molding product after foaming can reach a static conduction effect, and the mechanical property is also greatly improved; in view of process cost, firstly preparing the anti-static graphene EPS molding product, and then coating the surface with a graphene conductive coating, so that the static conduction effect is reached as well. The surface resistance can reach 104 to 106 Ohm, the tensile strength reaches 0.8 to 1.2 Mpa, the compressive strength reaches 0.4 to 0.5 Mpa, the flame retardant level reaches level B1, and the product plays an important role in specific fields such as war industry, electric power and automobiles.

Description

technical field [0001] The invention relates to the technical fields of graphene preparation, graphene modification and graphene application, in particular to a graphene preparation method and a method for preparing electrostatic conductive graphene EPS. Background technique [0002] Graphene is a two-dimensional crystalline material composed of closely packed carbon atoms. Because of its unique structure and excellent electrical, mechanical, optical, chemical and thermal properties, it has become a research hotspot for many people. In the industrial application of graphene, graphene with 1-2 layers can be collectively referred to as single-layer graphene. [0003] The downstream application of graphene has not yet opened up the market, especially in the field of composite materials. Graphene can be prepared by oxidation-reduction method and physical method. Graphene usually has high reactivity because of its large specific surface area. Especially, some active groups or in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08F2/44C08K9/02C08K9/00C08K9/04C08K3/04C08K7/00C08K7/24C08J9/20C08J7/04
CPCC08F2/44C08F112/08C08J7/0427C08J9/20C08J2325/06C08J2433/00C08J2483/04C08K3/04C08K7/00C08K7/24C08K9/00C08K9/02C08K9/04
Inventor 侯树亭沈海斌
Owner JILIN YUNTING ENERGY SAVING TECH CO LTD
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