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Method for optimizing electrical conductivity of porous carbon structure/polymer composite material

A composite material and conductive performance technology, applied in the field of material chemistry, can solve the problems of conductive channel blocking and single conductive network structure, achieve excellent conductive performance and expand the application space.

Inactive Publication Date: 2016-01-13
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, only the three-dimensional structure formed by the two-dimensional sheet graphene is used as the conductive filler of the polymer, and its conductive network structure is single, and the conductive channel will inevitably be blocked in the transmission of electrons.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A three-dimensional graphene structure was prepared by a hydrothermal method, and an ultra-light three-dimensional graphene structure with a stable structure was obtained by heating at 800° C. for 2 hours in a nitrogen atmosphere. Put it in the catalyst precursor solution (M 氯化铁 :M 氯化铌 = 1:1, C 氯化铁 =0.1mol / mL) for 0.5h, pre-frozen in liquid nitrogen and then vacuum freeze-dried at -50°C. The obtained dried sample was placed in the vacuum chamber of the plasma chemical vapor deposition system, hydrogen gas was introduced, and the temperature was controlled at 300° C. for 1 h to activate the catalyst. Turn on the plasma source and adjust the power to 350W. Under the catalyst system, keep the temperature and power constant, and maintain a continuous and stable flow of hydrogen gas, and inject methane gas at 60 sccm to make the carbon nanotubes on the pore walls of the three-dimensional graphene structure. The porous carbon structures of three-dimensional graphene and ca...

Embodiment 2

[0020] The three-dimensional graphene structure was prepared by the template method, and the three-dimensional graphene structure was immersed in the catalyst precursor solution (C 硫酸铜 =0.5mol / mL) for 4h. After the samples were removed, they were freeze-dried. Place the dried sample on the sample stage of the vacuum chamber of the plasma chemical vapor deposition system, close the vacuum chamber and evacuate to a vacuum degree of less than 0.1Pa. Flow hydrogen gas at a flow rate of 50 sccm, control the pressure at 200 Pa, heat the sample stage to 400° C. and maintain it for 1 h. Apply 200W power and keep it for 1h. After the catalytic system is formed, the temperature is raised to 450°C. The power and hydrogen flow rate remain constant. Acetylene gas is injected at 100 sccm to make carbon nanotubes grow between the pore walls of the three-dimensional graphene structure for one hour to obtain a three-dimensional Porous carbon ultralight structures of graphene and carbon nanot...

Embodiment 3

[0023] The three-dimensional graphene structure was prepared by the template method, and the three-dimensional graphene structure was heated at 1000 ° C for 2 h in a nitrogen atmosphere, and the three-dimensional graphene structure was prepared in the catalyst precursor solution (C 硫酸铜 =0.5mol / mL) for 4h. After the samples were removed, they were freeze-dried. Place the dried sample on the sample stage of the vacuum chamber of the plasma chemical vapor deposition system, close the vacuum chamber and evacuate to a vacuum degree of less than 0.1Pa. Flow hydrogen gas at a flow rate of 50 sccm, control the pressure at 200 Pa, heat the sample stage to 400° C. and maintain it for 1 h. Apply 200W power and keep it for 1h. After the catalytic system is formed, the temperature is raised to 450°C. The power and hydrogen flow rate remain constant. Acetylene gas is injected at 120 sccm to make carbon nanotubes grow on the pore wall of the graphene structure for 2 hours to obtain three-di...

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Abstract

The invention discloses a method for optimizing the electrical conductivity of a porous carbon structure / polymer composite material. Primarily, high temperature annealing treatment is carried out on the basis of a three-dimensional graphene structure to obtain a stable porous structure, plasma chemical vapor deposition technology is utilized for orientated growth of carbon nanotubes between the pore walls of the three-dimensional graphene structure so as to form a multistage network of graphene and carbon nanotubes, thereby obtaining an isotropic porous carbon structure serving as the reinforcement body of the polymer, and the reinforcement body can significantly improve the conductive properties of the porous carbon structure / polymer composite material. In the invention, the introduction of the carbon nanotubes realizes diversification of the conductive channel, thus being conducive to construction of a multi-channel electronic transmission path. At the same time, the porous carbon structure involved in the invention also has the advantages of low density, high specific surface area and high porosity, etc.

Description

technical field [0001] The invention relates to a method for optimizing the electrical conductivity of a porous carbon structure / polymer composite material, belonging to the field of material chemistry. Background technique [0002] Graphene is a two-dimensional honeycomb crystal structure composed of closely packed carbon atoms, which is the basic unit for building other carbon-based materials. Because of its unique crystal structure, graphene has excellent properties, such as ultra-high electrical and thermal conductivity, strong mechanical properties, etc. Therefore, graphene shows attractive application prospects in the fields of energy materials and composite functional materials. [0003] Polymer materials generally have the advantages of easy molding, good stability, and durability, but usually have poor electrical conductivity, and can even be said to be insulating materials, which greatly limits their applications. Therefore, in order to improve the conductivity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L79/02C08K7/24C08K3/04
Inventor 徐志伟倪亚吴腾飞滕堃玥王维
Owner TIANJIN POLYTECHNIC UNIV
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