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A kind of preparation method of graphene-polymer composite material

A technology of composite materials and graphene, which is applied in the field of preparation of graphene-polymer composite materials to achieve low energy consumption and improve the effect of uneven heating

Active Publication Date: 2019-11-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, people try to covalently link graphene derivatives to other polymer materials that can be uniformly composited with polymer materials to improve the dispersion performance of graphene in polymer materials. improved but its overall performance still needs substantial improvement

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] Mix the graphene-polyacrylonitrile powder mixture in Example 1 with the polytetrafluoroethylene powder with a density of 2.2 g / cubic centimeter and a particle size of 60 microns in a ratio of 1:5 by mass, and then form it by cold pressing under a pressure of 50 MPa , followed by sintering at a temperature of 375 degrees Celsius in air for 2 hours to obtain a composite material in which graphene and polyacrylonitrile are uniformly dispersed in filled polytetrafluoroethylene.

Embodiment 3

[0025]First obtain American Dow 959s low-density polyethylene pellets, then add it to 10 mg / ml graphene oxide ethanol solution in a ratio of 2:1 to graphene mass ratio, mix evenly, filter, and dry to obtain graphite oxide A mixture of ethylene and low density polyethylene particles. Subsequently, the mixture was treated in hydrazine hydrate vapor at 95 degrees Celsius for 24 hours to reduce the graphene oxide in the mixture to obtain a mixture of reduced graphene oxide and low-density polyethylene particles. Then the mixture of reduced graphene oxide and low-density polyethylene particles is sent to a 600-watt microwave oven protected by helium at room temperature at a speed of 0.2 m / s through a conveyor belt with a diameter of 20 cm to heat the reduced graphene oxide in the mixture. Treat for 1 second, then the mixture leaves the microwave heating zone and is cooled to room temperature by cold air, repeats the microwave heating-cooling process 5 times to obtain a mixture of g...

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Abstract

The invention discloses a preparation method of a graphene and macromolecule composite material. The preparation method comprises the following steps: firstly dispersing a graphene derivative in a solvent, mixing a solid particulate matter to form a mixture, drying the mixture, performing heating treatment on the mixture through a microwave heating zone at a set speed in a set atmosphere to convert the graphene derivative in the mixture into grapheme, subsequently cooling to obtain a mixture of the grapheme and the solid particulate matter, and then compounding the mixture and macromolecules through methods of melting, bonding, forming and the like to obtain a grapheme-macromolecule compound. The preparation method disclosed by the invention solves the problems of difficult graphene dispersion and poor graphene derivative performance, can be used for conveniently and quickly producing the graphene and macromolecule composite material in batch and is expected to make a contribution to further development and application of the graphene and macromolecule material.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a graphene polymer composite material, especially utilizing graphene derivatives which are easy to disperse and have microwave absorption characteristics. Solid particles that can be uniformly dispersed in the material are mixed to form a mixture, and then the mixture is dried and passed through a microwave heating zone at a set speed under a set atmosphere for microwave heating treatment to convert graphene derivatives in the mixture into graphene, and then graphite The mixture of alkene and solid particles is compounded with polymers to form graphene-polymer composites in which graphene can be uniformly 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 (thermal conductivity up to 5000w.m -1 .k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08L9/02C08L79/02C08L33/20C08L67/00C08L61/06C08L23/06C08K9/02C08K3/04C08K9/00C08K9/04C08K13/06C08K7/00
CPCC08K3/04C08K9/00C08K9/02C08K9/04C08K2201/001C08K2201/017C08L9/02C08L27/18C08L33/20C08L79/02C08L2205/025C08L2205/16C08L23/06C08L61/06C08K13/06C08K7/00C08L67/00
Inventor 张继中
Owner SOUTHEAST UNIV
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