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Method for preparing negative permittivity material from graphene, carbon nanometer tubes and phenolic resin

A negative dielectric constant and carbon nanotube technology, which is applied in the field of negative dielectric constant material preparation, can solve the problems of high dielectric loss and high conductivity, and achieve the effects of reduced dielectric loss, excellent thermal conductivity, and low density

Inactive Publication Date: 2016-07-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, near the percolation threshold, due to the high conductivity of metal materials, high dielectric loss is caused.

Method used

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  • Method for preparing negative permittivity material from graphene, carbon nanometer tubes and phenolic resin
  • Method for preparing negative permittivity material from graphene, carbon nanometer tubes and phenolic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put weighing paper on the electronic balance, take graphene with a clean key and put it on the electronic balance, weigh 0.025g graphene, pour the graphene into the container; then take a piece of weighing paper and put it On the electronic balance, use another clean key to take the carbon nanotubes to the electronic balance, weigh 0.025g of carbon nanotubes, and pour the weighed carbon nanotubes into the same container as the graphene; Put the paper on the electronic balance, use a clean key to take the phenolic resin to the electronic balance, weigh 0.70g of the phenolic resin, and pour the weighed phenolic resin into the same container. Pour the mixed powder in the container into the ball milling jar, and perform ball milling for 5 minutes, then stop the ball milling, remove the ball milling jar, pour the evenly mixed powder into the mortar, and drop 4 drops with a dropper with a volume fraction of 2.5 % PVA solution, grind for 5 minutes. Pour the powder into the ta...

Embodiment 2

[0029] Put weighing paper on the electronic balance, take graphene with a clean key and put it on the electronic balance, weigh 0.0335g graphene, pour the graphene that has been weighed into the container; then take a piece of weighing paper and put it on the electronic balance On the electronic balance, use another clean key to take the carbon nanotubes to the electronic balance, weigh 0.0165g of carbon nanotubes, and pour the weighed carbon nanotubes into the same container as the graphene; Put the paper on the electronic balance, use a clean key to take the phenolic resin to the electronic balance, weigh 0.70g of the phenolic resin, and pour the weighed phenolic resin into the same container. Pour the mixed powder in the container into the ball milling jar, and perform ball milling for 5 minutes, then stop the ball milling, remove the ball milling jar, pour the evenly mixed powder into the mortar, and drop 4 drops with a dropper with a volume fraction of 2.5 % PVA solution,...

Embodiment 3

[0031] Put weighing paper on the electronic balance, take graphene with a clean key and put it on the electronic balance, weigh 0.0165g graphene, pour the graphene into the container; then take a piece of weighing paper and put it in On the electronic balance, use another clean key to take the carbon nanotubes to the electronic balance, weigh 0.0335g of carbon nanotubes, and pour the weighed carbon nanotubes into the same container as the graphene; Put the paper on the electronic balance, use a clean key to take the phenolic resin to the electronic balance, weigh 0.70g of the phenolic resin, and pour the weighed phenolic resin into the same container. Pour the mixed powder in the container into the ball milling jar, and perform ball milling for 5 minutes, then stop the ball milling, remove the ball milling jar, pour the evenly mixed powder into the mortar, and drop 4 drops with a dropper with a volume fraction of 2.5 % PVA solution, grind for 5 minutes. Pour the powder into t...

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Abstract

The invention discloses a method for preparing a negative permittivity material with graphene, carbon nanometer tubes and phenolic resin.The method includes the steps that graphene powder, carbon nanometer tube powder and phenolic resin powder are subjected to ball mill mixing, then a PVA solution is added, and the mixture is ground to be even; the powder is poured into a mold to be pressed into a sheet.A certain quantity of functional groups exist on the surface of the graphene in the composite material prepared with the method, and are not connected with each other and free of electric conduction, repulsive force exists between the functional groups, the functional groups are attached between sheet layers of the graphene and distributed on the surface of the graphene to form an interface layer used for limiting leakage conductive currents, and therefore dielectric losses are decreased.

Description

technical field [0001] The invention belongs to the technical field of preparation of negative dielectric constant materials, in particular to a method for preparing negative dielectric constant materials from graphene, carbon nanotubes and phenolic resin. Background technique [0002] Negative dielectric material is a material whose dielectric constant value measured in certain frequency bands appears negative. Due to the change of material structure, the conductance changes from tunnel conduction to variable range transition, which leads to the appearance of dielectric constant. The reason for the negative value. Negative dielectric materials are widely used in many fields, such as resonators, filters and oscillators. [0003] Therefore, it is very important to artificially synthesize negative dielectric materials. Negative dielectric materials are usually designed by compounding an insulating matrix and a highly conductive material into a percolation material. In the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08L29/04C08K3/04C08K7/24
CPCC08K2201/011C08L61/06C08L2201/08C08L2203/20C08L29/04C08K3/04C08K7/24
Inventor 钱磊吴海坤范润华孙凯程传兵解培涛
Owner SHANDONG UNIV
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