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Preparation method of graphene inorganic nonmetal composite material

A technology of inorganic non-metallic and composite materials, applied in the field of preparation of graphene inorganic non-metallic composite materials, can solve the problems of difficult large-scale application, low output of ball milling, etc., achieve low energy consumption, and improve the effect of uneven heating

Inactive Publication Date: 2017-04-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low output of ball milling makes it difficult to apply on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, graphene oxide powder and reduced graphene oxide powder are prepared. 30 grams of graphite mixed with 15 grams of sodium nitrate and 750 milliliters of concentrated sulfuric acid. The mixture was cooled to 0°C in an ice bath, and after stirring for 2 h, 90 g of potassium permanganate was slowly added, keeping the temperature of the mixture below 5°C during the mixing process. The mixture was stirred for another hour and allowed to warm to room temperature by removing the ice bath. Add 1 liter of distilled water to the mixture and increase the temperature in the oil bath to 90°C. Another 300 ml of water were added and stirred for another hour and a half. The color of the mixture turned brown. The mixture was then treated and diluted with 30% hydrogen peroxide in 300 ml and 30 liters of hot water. The mixture was further washed with excess water until the pH of the filtrate was almost neutral to obtain graphene oxide. Then graphene oxide was dispersed in water...

Embodiment 2

[0023]First obtain stable zirconia powder with a diameter of about 40 nanometers and containing 5 mol% Y2O3. Then the graphene oxide was converted into graphene and added to a 10 mg / ml graphene oxide aqueous solution at a mass ratio of zirconia powder to graphene of 5:1 and stirred evenly. Then filter and dry to obtain a uniform mixture of graphene oxide and zirconia powder. Then, the mixture is fed into a microwave heating zone with a power of 1000 watts and a diameter of 20 cm by means of a conveyor belt at a speed of 0.01 m / s under the protection of an atmosphere with a ratio of nitrogen to hydrogen of 55:1 and a temperature of 250 degrees Celsius. Microwave heating for about 10 seconds, and then enter the room temperature atmosphere cooling area controlled by circulating cooling water for cooling. After the mixture was heated by microwave for 10 times, the graphene oxide in the mixture was transformed into graphene. Wherein the carbon content of the graphene in the mixtu...

Embodiment 3

[0025] Edge carboxylated graphene flakes are first prepared. 5 grams of graphite and 100 grams of dry ice were added to a stainless steel capsule containing 1000 grams of 5 mm diameter stainless steel spheres. The container was sealed and fixed in a planetary ball mill (F-P4000), and stirred at a speed of 500 rpm (rotation per minute) for 48 hours. The internal pressure is then slowly released through a gas outlet. At the end of the ball milling, the lid of the container is opened in the air, and the moisture in the air triggers the carboxylate to undergo a violent hydration reaction to generate carboxylic acid and emit light. The resulting product was subjected to Soxhlet extraction with 1M hydrochloric acid solution to thoroughly acidify the carboxylate and remove possible inorganic non-metallic impurities. Finally, freeze-dry at minus 120 degrees Celsius for 48 hours in a vacuum environment of 0.05 mm Hg to obtain a dark black powder of edge carboxylated graphene nanoshee...

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Abstract

The invention discloses a preparation method of a graphene inorganic nonmetal composite material. The preparation method comprises the following steps of enabling a graphene derivative to be dispersed in a solvent for the first time to be mixed with solid granules so as to obtain a mixture; drying the mixture, after the mixture is dried, performing heating treatment on the mixture at the set speed under set atmosphere through a microwave heating region, so as to convert a graphene derivative in the mixture into graphene, and then performing cooling so as to obtain a mixture of graphene and granular substances; and enabling the mixture to be compounded with inorganic nonmetal in methods of melting, high-temperature sintering, extruding, shaping and the like so as to obtain the graphene-inorganic nonmetal composite material. The method provided by the invention solves the problem that conventional graphene is difficult to disperse and the graphene derivative is poor in properties, can be used for convenient and quick batch production of the graphene-inorganic nonmetal composite material, and is hopeful to make contributions to further development and application of the graphene and inorganic nonmetal materials.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a graphene inorganic non-metallic composite material. In particular, graphene derivatives are easy to disperse and have microwave absorption characteristics. The solid particles that can be uniformly dispersed in the non-metallic material are mixed to form a mixture, and then the mixture is dried and subjected to microwave heating treatment through a microwave heating zone at a set speed under a set atmosphere to convert the graphene derivatives in the mixture into graphene, and then The mixture of graphene and solid particles is combined with inorganic non-metal to form a graphene-inorganic non-metal composite in which graphene can be well dispersed. Background technique [0002] As a two-dimensional material, graphene has excellent mechanical properties (Young's modulus up to 1.0TPa), electrical properties (electron mobility up to 10 6 cm 2 .v -1 the s -1 ), thermal properties (therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C04B33/13C04B33/04C04B35/48C04B35/10
CPCC04B33/13C04B33/04C04B35/10C04B35/48C04B2235/3225C04B2235/3418C04B2235/3472C04B2235/425C04B2235/6022C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/661
Inventor 张继中
Owner SOUTHEAST UNIV
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