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Method for modifying graphene by aqueous titanate

A water-based titanate and graphene technology, which is applied in the field of water-based titanate modified graphene, can solve the problems such as the inability to modify the surface of graphene, and achieve good peeling degree, obvious effect, improved application field and application effect. Effect

Inactive Publication Date: 2015-08-19
ZHEJIANG TAISUO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a method to deal with graphene basically does not play the role of graphene surface modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]A method for modifying graphene with water-based titanate. First, the water-based titanate bis(dioctyloxypyrophosphate) ethylene titanate solution is dissolved in water. The process of dissolving is through mechanical stirring. 50 rev / min, the stirring time is 5 minutes, the temperature is 10 DEG C, then add the graphene powder whose length and width are 1-200 microns respectively, and the thickness is 6-10 nanometers, aqueous titanate bis(dioctyl oxide The quality of base pyrophosphate) ethylene titanate is 2% of the graphene powder mass, and ultrasonic dispersion is carried out in a magnetic field with a magnetic field strength of 0.5T. The ultrasonic frequency of ultrasonic dispersion is 20KHz, and the power is 1 kilowatt. The dispersion time is 30 minutes, and the temperature is controlled at 10°C to obtain a graphene dispersion. The mass fraction of the graphene powder in the graphene dispersion is 0.5%; Distillation or vacuum distillation of the olefin dispersion, ...

Embodiment 2

[0026] A method for modifying graphene with water-based titanate, first the chelate (model 311W) solution of water-based titanate bis(dioctyloxypyrophosphate) ethylene titanate and triethanolamine is dissolved in water, The process of dissolving is through mechanical stirring, the speed is 100 rpm, the stirring time is 30 minutes, the temperature is 35°C, and then the graphene powder with a length and width of 1-200 microns and a thickness of 6-10 nanometers is added Body, the quality of the chelate solution of aqueous titanate bis(dioctyloxypyrophosphate) ethylene titanate and triethanolamine is 1.5% of the graphene powder quality, in the magnetic field that magnetic field strength is 5T Perform ultrasonic dispersion, the ultrasonic frequency of ultrasonic dispersion is 30KHz, the power is 5 kilowatts, the ultrasonic dispersion time is 90 minutes, and the temperature is controlled at 60°C to obtain a graphene dispersion. The mass fraction of graphene powder in the graphene dis...

Embodiment 3

[0028] A method for modifying graphene with water-based titanate, first dissolves water-based titanate bis(dioctyl pyrophosphate) glycolate titanate in water, the process of dissolving is by mechanical stirring, the rotating speed is 80 rpm, stirring time is 20 minutes, temperature is 30°C, then add graphene powder with length and width of 1 to 200 microns and thickness of 6 to 10 nanometers, aqueous titanate bis(dioctyl coke The quality of phosphate) glycolate titanate is 1.5% of graphene powder quality, and in the magnetic field that magnetic field strength is 2T, carry out ultrasonic dispersion, the ultrasonic frequency of ultrasonic dispersion is 10KHz, and power is 3 kilowatts, and ultrasonic dispersion time For 50 minutes, the temperature is controlled at 20°C to obtain a graphene dispersion, and the mass fraction of the graphene powder in the graphene dispersion is 6%; then under the action of an external magnetic field with a magnetic field strength of 5T, the graphene ...

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Abstract

The invention relates to a method for modifying graphene by aqueous titanate. The method is as below: first dissolving aqueous titanate in water, then adding a graphene powder, and conducting ultrasonic treatment in a magnetic field to obtain a graphene dispersion; conducting distillation or vacuum distillation on the dispersion in the external magnetic field to obtain a graphene concentrated solution; and then drying to obtain aqueous titanate modified graphene. The method uses aqueous titanate for surface modification of graphene, introduces active groups to the graphene surface and avoids the agglomeration of graphene; and active group can significantly improve the dispersion and compatibility of graphene with other materials, and substantially improve the performance of graphene composite. In addition, ultrasonic treatment on the graphene dispersion in magnetic field not only can make the aqueous titanate fully modify the graphene, but also can achieve good stripping effect of graphene under the joint action of the magnetic field and ultrasound; and the method can significantly reduce the usage amount of graphene composite.

Description

technical field [0001] The invention belongs to the technical field of new graphene materials, and relates to a method for modifying graphene with water-based titanate, in particular to a method for surface-modifying graphene with water-based titanate in water and ultrasonically treating graphene in a magnetic field The graphene dispersion liquid, and the preparation method of distilling the graphene dispersion liquid in a magnetic field or under reduced pressure to obtain a graphene concentrated liquid, and then drying to obtain an aqueous titanate-modified graphene. Background technique [0002] In 2004, Professor Andre Heim and Professor Konstantin Novoselov of the University of Manchester in the United Kingdom stripped graphene from graphite flakes through a very simple method, for which they also won the 2010 Year Nobel Prize in Physics. The graphene industry is still in the stage of mass production and exploration. The main preparation methods include micromechanical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 毛惠敏陆炅石建华
Owner ZHEJIANG TAISUO TECH
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