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A kind of preparation method of graphene/silicon dioxide composite particle

A technology of silica and composite particles, which is applied in the field of nanocomposite materials, can solve the problems of difficult dispersion and easy agglomeration of graphene and silica, and achieve the effect of low density, high specific surface area and superior self-structure

Active Publication Date: 2019-06-07
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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  • A kind of preparation method of graphene/silicon dioxide composite particle
  • A kind of preparation method of graphene/silicon dioxide composite particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Mix 0.5g of graphene oxide with water to obtain a solution of graphene oxide, put it in an ultrasonic instrument for further ultrasonic dispersion, the frequency of ultrasonic is 1000HZ, the temperature is 25°C, the ultrasonic time is 0.5h, and the obtained concentration is 1mg / ml of graphene oxide solution;

[0021] (2) Add 1 g of silicon dioxide powder to the graphene oxide solution, and then perform ultrasonic dispersion to obtain a graphene oxide / silicon dioxide solution. The ultrasonic frequency is 1000HZ, the time is 0.5h, and the temperature is controlled below 50°C. Add 0.05 g of sodium polystyrene sulfonate, and magnetically stir the mixture for 30 min at room temperature;

[0022] (3) Place the obtained graphene oxide / silicon dioxide aqueous solution into a beaker, then add 5 mg of hydroquinone, mix for 30 minutes, then heat the mixed solution at a constant temperature and keep it at 30° C., and react for 8 hours to obtain graphene / silicon dioxide. sili...

Embodiment 2

[0027] (1) Mix 2g of graphene oxide with ethanol to obtain a solution of graphene oxide, put it in an ultrasonic instrument for further ultrasonic dispersion, the ultrasonic frequency is 800HZ, the temperature is 30°C, the ultrasonic time is 0.8h, and the obtained concentration is 2mg / ml of graphene oxide ethanol solution;

[0028] (2) Add 1 g of silicon dioxide powder into the graphene oxide ethanol solution, and then perform ultrasonic dispersion to obtain the graphene oxide / silicon dioxide ethanol solution. The ultrasonic frequency is 750HZ, the time is 0.5h, and the temperature is controlled below 50°C. Then add 0.08g sodium polystyrene sulfonate, and the above mixed solution is magnetically stirred at room temperature for 30min;

[0029] (3) Put the obtained graphene oxide / silicon dioxide ethanol solution into a beaker, then add 5 mg of sodium borohydride, mix for 30 minutes, then heat the mixture and keep it at 30°C, and react for 12 hours to obtain graphene / silica ...

Embodiment 3

[0034] (1) Mix 3g of graphene oxide with ethanol to obtain a solution of graphene oxide, put it in an ultrasonic instrument for further ultrasonic dispersion, the ultrasonic frequency is 600HZ, the temperature is 40°C, the ultrasonic time is 1h, and the obtained concentration is 3mg / ml Graphene oxide ethanol solution;

[0035] (2) Add 2 g of silicon dioxide powder to the graphene oxide ethanol solution, and then perform ultrasonic dispersion to obtain a graphene oxide / silicon dioxide ethanol solution. The ultrasonic frequency is 600HZ, the time is 1h, and the temperature is controlled below 50°C. Then add 0.1 g of sodium dodecylbenzenesulfonate, and the above mixed solution is magnetically stirred at room temperature for 30 min;

[0036](3) Place the obtained ethanol solution of graphene oxide / silicon dioxide in a beaker, then add 5 mg of hydrazine hydrate, mix for 40 minutes, then heat the mixed solution to keep the temperature at 25°C, and react for 10 hours to obtain graph...

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Abstract

The invention provides a preparation method of graphene / silica composite particles, belongs to the field of nano-composites and solves the problem about dispersion of graphene and silica in rubber. According to the preparation method, graphene aerogel is mainly built, silica is then dispersed in micropores of the aerogel, and accordingly, aggregation of graphene and silica is avoided. The graphene / silica aerogel with special morphology, size and excellent physical properties is prepared from graphene oxide as a precursor by controlling properties, the chemical reduction type and the drying process of graphene oxide, and the aerogel has advantages of low density, high porosity, high specific surface area, low thermal conductivity, stable chemical properties and the like. With addition of the aerogel to rubber, graphene lamellae are uniformly dispersed in a rubber matrix, and interface interaction between the graphene and the rubber is improved. The aerogel is a three-dimensional carbon material with large porosity and specific surface area, and can be used as an excellent material in rubber reinforcement. The preparation process is greatly improved compared with the conventional process.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/12C08K9/04C08K9/02C08K7/24C08K3/36C08L7/00C08L9/06
CPCC08K3/36C08K7/24C08K9/02C08K9/04C08K9/12C08L7/00C08L9/06C08L2205/035C08K13/02
Inventor 温世鹏涂菁琬刘力
Owner BEIJING UNIV OF CHEM TECH
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