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Preparation method of graphene/silicon dioxide/rubber composite material

A technology of silica and composite materials, applied in the field of nanocomposite materials, can solve the problems of difficult dispersion and easy agglomeration of graphene and silica, and achieve the effects of low density, high specific surface area and low thermal conductivity

Active Publication Date: 2017-08-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, this patent proposes to construct a composite filler of graphene and silica, and at the same time solve the problem of difficult dispersion and easy agglomeration of graphene and silica in rubber

Method used

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  • Preparation method of graphene/silicon dioxide/rubber composite material

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Effect test

Embodiment 1

[0023] (1) Mix graphene oxide with water to obtain a graphene oxide solution, put it in an ultrasonic instrument for further ultrasonic dispersion, the ultrasonic frequency is 1000HZ, the temperature is 25°C, the ultrasonic time is 0.5h, and the obtained concentration is 1mg / ml Graphene oxide solution;

[0024] (2) Mix ethyl orthosilicate and ethanol at a mass ratio of 1:20 to obtain a mixed solution. Stir with a magnetic stirring bar at a temperature of 30° C. for 0.5 h.

[0025] (3) The graphene oxide aqueous solution obtained above and the mixed solution of ethyl orthosilicate: graphene oxide: ethyl orthosilicate is added together with a mass ratio of 1:10, and then graphene oxide: hexadecane Trimethylammonium bromide was added into the surfactant at a mass ratio of 1:1, mixed and stirred for 1 hour, while keeping the mixture heated at a constant temperature of 40°C, and then adding ammonia water with pH=13 with a dropper while stirring, ammonia water and silicon The mass...

Embodiment 2

[0030] (1) Mix graphene oxide with water to obtain a solution of graphene oxide, put it in an ultrasonic instrument for further ultrasonic dispersion, the ultrasonic frequency is 500HZ, the temperature is 50°C, the ultrasonic time is 1h, and the concentration is 2mg / ml Graphene oxide solution;

[0031] (2) Mix ethyl orthosilicate and methanol at a mass ratio of 1:30 to obtain a mixed solution. The above solution was placed in a beaker and stirred at a temperature of 30° C. with a magnetic stirring bar for 0.5 h.

[0032] (3) The aqueous solution of graphene oxide obtained above and the mixed solution of ethyl orthosilicate are added together with graphene oxide: ethyl orthosilicate with a mass ratio of 1:20, and then graphene oxide: sixteen Alkyltrimethylammonium bromide was added into the surfactant at a mass ratio of 1:2, mixed and stirred for 1 hour, while keeping the mixture heated at a constant temperature of 45°C, and then adding ammonia water with a pH of 13 with a dro...

Embodiment 3

[0037] (1) Mix graphene oxide with water to obtain a graphene oxide solution, put it in an ultrasonic instrument for further ultrasonic dispersion, the ultrasonic frequency is 1000HZ, the temperature is 25°C, the ultrasonic time is 0.5h, and the obtained concentration is 1mg / ml Graphene oxide solution;

[0038] (2) Mix ethyl orthosilicate and trifluoroethanol at a mass ratio of 1:20 to obtain a mixed solution. Stir with a magnetic stirring bar at a temperature of 30° C. for 0.5 h.

[0039] (3) The aqueous solution of graphene oxide obtained above and the mixed solution of ethyl orthosilicate are added together with graphene oxide: ethyl orthosilicate with a mass ratio of 1:10, and then graphene oxide: polyphenylene oxide Sodium ethylene sulfonate was added into the surfactant at a mass ratio of 1:1, mixed and stirred for 1 hour, while keeping the mixture heated at a constant temperature of 40°C, and then adding ammonia water with pH = 13 with a dropper while stirring, the mas...

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Abstract

The invention relates to a preparation method of a graphene / silicon dioxide / rubber composite material, and belongs to the field of nanometer composite materials. A graphene and silicon dioxide composite filler is provided, and the problems of difficulty in dispersing and easiness in agglomeration of graphene and silicon dioxide are solved. The method mainly comprises the following steps of in the process of mixing graphene and silicon dioxide, building a silicon dioxide aerogel, and uniformly dispersing the graphene sheet layers into the silicon dioxide aerogel; finally, compounding the composite particles and the rubber, so as to obtain the novel graphene / silicon dioxide / rubber composite material. The comprehensive property of the graphene / silicon dioxide / rubber composite material is better than the property of the composite material with graphene and silicon dioxide respectively doped into the rubber.

Description

technical field [0001] The invention relates to an application of a graphene material, which belongs to the field of nanocomposite materials. Background technique [0002] Graphene is a sp 2 A carbonaceous material with a single-layer two-dimensional honeycomb lattice structure formed by closely packing orbital hybrid carbon atoms. In 2004, Andre Geim and Konstantin Novoselov of the University of Manchester in the United Kingdom succeeded in making two-dimensional graphene crystals that can truly exist independently for the first time by using tape to peel off highly oriented graphite. Graphene has an infinitely repeating periodic structure in the plane, and only nanoscale in the direction perpendicular to the plane, which can be regarded as a nanomaterial with macroscopic dimensions. Graphene has high specific surface area, large aspect ratio, high modulus and good solvent dispersibility, so it is a potential filler for rubber reinforcement. In order to maximize the perf...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/06C08L9/02C08L23/16C08L11/00C08L23/22C08L9/00C08L27/12C08L83/04C08K7/26C08K3/04
CPCC08K3/04C08K7/26C08L7/00C08L9/06C08L9/02C08L23/16C08L11/00C08L23/22C08L9/00C08L27/12C08L83/04
Inventor 温世鹏涂菁琬刘力
Owner BEIJING UNIV OF CHEM TECH
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