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Preparation method of graphene/white carbon black composite material

A composite material and graphene technology, applied in the direction of coating, etc., to achieve the effect of simple preparation process, increase specific surface area, and realize waste recycling

Inactive Publication Date: 2017-08-18
TANGSHAN JIANHUA TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Introducing graphene into white carbon black to give full play to the excellent physical and chemical properties of the two to prepare highly dispersed composite materials is still a blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Take the sulfuric acid-containing graphene oxide solution prepared by the hummers method, add pure water, adjust the mass concentration of the solution to 1%, and the pH to 2, stir evenly, and set aside;

[0023] (2) Weigh the sodium natron solution according to the mass ratio of sodium natron: graphene oxide of 1:1, drop it into the sulfuric acid-containing graphene oxide solution in step (1), stir evenly, and the pH of the mixed solution 5, continue to stir, ultrasonic 30min, stand-by;

[0024] (1) Take out the mixed liquid after the reaction in step (2) is completed and cooled, and perform solid-liquid separation through filtration and centrifugation, and freeze-dry the separated solid to obtain a graphene / silica composite material precursor;

[0025] (2) The obtained precursor was heated to 400°C under the protection of argon-hydrogen mixture (95:5), and kept for 2 hours. After the reaction was completed, it was lowered to room temperature under the protection o...

Embodiment 2

[0027] (1) Take the sulfuric acid-containing graphene oxide solution prepared by the hummers method, add pure water, adjust the mass concentration of the solution to 0.01%, and the pH to 5, stir evenly, and set aside;

[0028] (2) Weigh the soda soda solution according to the mass ratio of 10:1 of sobaine: graphene oxide, drop it into the sulfuric acid-containing graphene oxide solution in step (1), stir evenly, and then drop into sulfuric acid Solution, until the pH of the mixed solution is 7, continue to stir, ultrasonic 30min, stand-by;

[0029] (3) Take out the mixed liquid after the reaction in step (2) is completed and cooled, perform solid-liquid separation through filtration and centrifugation, and freeze-dry the separated solid to obtain a graphene / silica composite material precursor;

[0030] (4) The obtained precursor was heated to 600°C under the protection of argon-hydrogen mixture (95:5), and kept for 2 hours. After the reaction was completed, it was lowered to r...

Embodiment 3

[0032] (1) Take the sulfuric acid-containing graphene oxide solution prepared by the hummers method, add pure water, adjust the mass concentration of the solution to 0.01%, and the pH to 5, stir evenly, and set aside;

[0033] (2) Weigh the soda soda solution according to the mass ratio of 15:1 of soda alkali: graphene oxide, drop it into the graphene oxide solution containing sulfuric acid in step (1), stir evenly, and then drop into sulfuric acid Solution, until the pH of the mixed solution is 4, continue to stir, ultrasonic 30min, stand-by;

[0034] (3) Take out the mixed liquid after the reaction in step (2) is completed and cooled, and perform solid-liquid separation through filtration and centrifugation, and the separated solid is spray-dried to obtain a graphene / silica composite material precursor;

[0035] (4) The obtained precursor was heated to 300°C under the protection of argon-hydrogen mixture (95:5), and kept for 3 hours. After the reaction was completed, it was ...

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Abstract

The invention relates to a preparation method of a graphene / white carbon black composite material. The method comprises the following steps: a graphene oxide solution containing sulfur acid is prepared with a hummers method and uniformly stirred, a sodium silicate solution is added dropwise after no precipitate is produced, the mixture is stirred and treated ultrasonically, sol is obtained and subjected to centrifugal separation, obtained pasty solids are dried and placed in a tube furnace for thermal reduction in H2 / Ar mixed atmosphere, and powder, namely, the graphene / white carbon black composite material is obtained finally. In the method, aggregation of the material can be inhibited effectively through interpenetration of graphene and white carbon black, so that the composite material which is highly dispersed and contains nanoscale white carbon black is obtained; the graphene oxide solution containing sulfur acid is taken as one of reaction raw materials, accordingly, the problem about treatment of waste acid and waste water produced in the hummers method is solved, a graphene oxide cleaning link is omitted, and energy and water are saved. The prepared graphene / white carbon black composite material is high in purity and can be widely applied to the fields of rubber, paint and the like.

Description

technical field [0001] The invention relates to the field of preparation of highly dispersed composite materials, in particular to a method for preparing graphene / white carbon black composite materials with functional fillers. Background technique [0002] White carbon black is precipitated silica, which is a white non-toxic, amorphous fine powder, which has the characteristics of porosity, high temperature resistance, flame retardancy, light weight and high chemical purity. Strong, thickening, and thixotropic properties are widely used in daily and chemical industries such as rubber, paint, plastics, paint, white pigments, textiles, papermaking, pesticides, synthetic resins, and food additives. [0003] The preparation methods of white carbon black mainly include precipitation method and gas phase method. The most commonly used white carbon black in the market is produced by precipitation method. This method has low production cost and simple process, but the product has l...

Claims

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Application Information

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IPC IPC(8): C08K3/04C08K3/36C09D7/12
CPCC08K3/04C08K3/36C09D7/61
Inventor 耿晓欣吴洪鹏高晓晔侯林艳孟英
Owner TANGSHAN JIANHUA TECH DEV
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