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Functional graphene and preparation method as well as application thereof to graphene /non-polar polymer composite material

A graphene and fossil technology, applied in chemical instruments and methods, dyed organic silicon compound treatment, dyed low-molecular organic compound treatment, etc., can solve problems such as harsh reaction conditions, dispersion, and destruction of graphene conjugated structures, and achieve improved The effect of conductive performance, strong controllability and great application value

Active Publication Date: 2013-01-30
WUXI MINGZHU CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some unsolved problems in the functionalization of graphene with organic groups, such as the limited number of functionalized small molecular groups attached to the surface of graphene, and the excessive functionalization groups greatly destroy the conjugated structure of graphene. , reducing the self-conductivity of graphene
[0007] In addition, these reported functionalization reactions require anhydrous and oxygen-free, harsh reaction conditions
Moreover, these functionalized groups reported in the literature are mainly polar groups, so the obtained functionalized graphene can only be dispersed in polar solvents and polar polymer matrices.

Method used

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  • Functional graphene and preparation method as well as application thereof to graphene /non-polar polymer composite material
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  • Functional graphene and preparation method as well as application thereof to graphene /non-polar polymer composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) The raw material graphene oxide and octyltriethoxysilane are dissolved in ethanol, and in the presence of the catalyst triethylamine, the precursor - octyltriethoxysilane modified graphene oxide is formed by condensation reaction, and the reaction temperature 40 oC , wherein the concentration of graphene oxide is 2 mg / ml, and the mass ratio of octyltriethoxysilane to graphene oxide is 3:1; the graphene oxide in this step is obtained by oxidizing graphite as a raw material, and the The oxidation method is common knowledge in the art and will not be repeated here.

[0026] 2) The octyltriethoxysilane-modified graphene oxide was ultrasonically dispersed in oleic acid solvent at 150 oC The oleic acid-functionalized graphene was obtained by reacting for 12 h. During the reaction, the graphene oxide and the modified oleic acid molecules were simultaneously reduced, and the concentration of the octyltriethoxysilane-modified graphene oxide was 2 mg / ml. After the reaction...

Embodiment 2

[0033] 1) The raw material graphene oxide and octyltriethoxysilane are dissolved in N,N-dimethylformamide, and in the presence of the catalyst triethylamine, the precursor - octyltriethoxy is formed by condensation reaction Silane-modified graphene oxide, reaction temperature 50 oC , wherein the concentration of graphene oxide is 3 mg / ml, and the mass ratio of octyltriethoxysilane to graphene oxide is 3:1;

[0034] 2) The octyltriethoxysilane-modified graphene oxide was ultrasonically dispersed in oleic acid solvent at 160 oC The oleic acid-functionalized graphene was obtained by reacting for 15 h. During the reaction, the graphene oxide was simultaneously reduced and the oleic acid molecule was connected. The concentration of the graphene oxide modified by octyltriethoxysilane was 3 mg / ml.

[0035]

Embodiment 3

[0037] 1) The raw material graphene oxide and octyltriethoxysilane are dissolved in a mixed solvent of N,N-dimethylacetamide and 1-methyl-2-pyrrolidone. Carbohydrate-Octyltriethoxysilane-modified graphene oxide, reaction temperature 50 oC , wherein the concentration of graphene oxide is 3 mg / ml, and the mass ratio of octyltriethoxysilane to graphene oxide is 3:1;

[0038] 2) Ultrasonic dispersion of octyltriethoxysilane-modified graphene oxide in oleic acid solvent at 170 oC The oleic acid-functionalized graphene was obtained by reacting for 20 h. During the reaction, the graphene oxide was simultaneously reduced and the oleic acid molecule was connected. The concentration of the graphene oxide modified by octyltriethoxysilane was 3 mg / ml.

[0039]

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Abstract

The invention discloses functional graphene and a preparation method as well as application thereof to a graphene / non-polar polymer composite material. The preparation method of the functional graphene comprises the following steps of: uniformly bonding oleic acid molecules to the surface of the graphene in a covalent bond mode; mixing the functional graphene obtained in a solution blending mode and polyethylene solution; and then performing settling, drying and die pressing to obtain the conductive functional graphene / polyethylene shielding material, or performing melt blending to directly obtain the functional graphene / polyethylene shielding material. The percentage content of the graphene in the composite material is controllable within a range of 1-10 percent. The preparation method has the advantages of simplicity, easiness in operation, high controllability and capability of realizing large-scale production; the functional graphene can be uniformly dispersed in the polyethylene matrix; and thus, the obtained polyethylene composite material has higher conductivity in case of low graphene mixing amount, and has great application value in the fields such as cable shielding, electromagnetic shielding and anti-static electricity.

Description

[0001] technical field [0002] The invention belongs to the field of graphene / polymer composite materials, and in particular relates to a functionalized graphene / polyethylene semiconductor shielding material and a preparation method and application thereof. Background technique [0003] Polymer-based conductive shielding materials are widely used in cables, automobiles, electronics, and mining fields. Among the shielding materials, only cable shielding materials, the annual consumption in my country reaches hundreds of thousands of tons. However, the general polymer matrix is ​​an insulator, and the current general method is to increase the conductivity of the polymer by adding a large amount of conductive carbon black. Shielding materials with a conductivity of 1S / m on the market usually need to add conductive carbon black with a mass fraction of 40-50%. However, the addition of a large amount of carbon black not only reduces the mechanical properties of the polymer matri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/44C09C3/12C09C3/08C08K9/06C08K3/04C08L23/06C09K3/00C09K3/16
Inventor 蒋一昆汪根林于金花陆洲冯耀才
Owner WUXI MINGZHU CABLE
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