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A method for growing carbon nanotubes in the pores of expanded graphite

A technology of expanded graphite and carbon nanotubes, applied in the direction of nanocarbon, carbon nanotubes, graphene, etc., can solve problems such as tensile strength, low thermal conductivity, etc.

Active Publication Date: 2019-08-06
SHANXI DATONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the most important uses is to press expanded graphite into flexible graphite as a sealing, thermal conductivity, and conductive material, but at present, flexible graphite generally has defects such as low tensile strength and thermal conductivity.

Method used

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  • A method for growing carbon nanotubes in the pores of expanded graphite
  • A method for growing carbon nanotubes in the pores of expanded graphite
  • A method for growing carbon nanotubes in the pores of expanded graphite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] First pour 60g of toluene into the beaker, then pour 40g of ferrocene and 500g of expandable graphite into the beaker in turn, and stir for 5min at a stirring speed of 200rpm; then, after natural drying in a fume hood, take 100mg of the mixture and put it into one end In the sealed quartz tube, put it in a microwave oven after vacuuming, take it out after reacting for 60s at a power of 800W, and obtain a product in which carbon nanotubes have grown on the surface and edge of the expanded graphite sheet structure. The scanning electron microscope of the obtained product Photos are attached figure 1 shown.

Embodiment 2

[0013] First pour 40g of toluene into the beaker, then pour 35g of ferrocene and 450g of expandable graphite into the beaker in turn, and stir for 4min at a stirring speed of 400rpm; then, after natural drying in a fume hood, take 100mg of the mixture and put it into one end In the sealed quartz tube, put it in a microwave oven after vacuuming, take it out after reacting for 40s at a power of 800W, and obtain a product in which carbon nanotubes have grown on the surface and edge of the expanded graphite sheet structure. The scanning electron microscope of the obtained product Photos are attached figure 2 shown.

Embodiment 3

[0015] First pour 30g of toluene into the beaker, then pour 25g of ferrocene and 400g of expandable graphite into the beaker in turn, and stir for 2min at a stirring speed of 500rpm; then, after natural drying in a fume hood, take 100mg of the mixture and put it into one end In the sealed quartz tube, put it in a microwave oven after vacuuming, take it out after reacting for 10s at a power of 800W, and obtain a product in which carbon nanotubes have grown on the surface and edge of the expanded graphite sheet structure. The scanning electron microscope of the obtained product Photos are attached image 3 shown.

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Abstract

The invention relates to a method for preparing expanded graphite by utilizing a microwave heating process while growing nano carbon tubes in the surface and the pore structure of the expanded graphite. According to the invention, isolated expanded graphite lamellar structures are effectively linked due to the presence of the nano carbon tubes to constitute a space internet structure, and thus a channel for effective transmission of electron, heat energy and load is constructed so as to prepare a flexible graphite composite material having high ensile strength and heat conducting property and having enhanced carbon nano tubes.

Description

technical field [0001] The invention belongs to the field of new nanometer materials, and the compound obtained by growing nanometer carbon tubes in the pores of expanded graphite is a new type of carbon material. Background technique [0002] Expanded graphite is a loose and porous worm-like substance obtained by oxidation, intercalation, water washing, drying and high-temperature expansion of natural flake graphite, so it is also called worm graphite. The expanded graphite obtained after high-temperature expansion has an expansion multiple of hundreds to thousands of times. It has a well-developed network pore structure and a large specific surface area, so it has beneficial adsorption properties. As a new type of carbon material, expanded graphite not only has the characteristics of heat resistance, corrosion resistance and self-lubrication of natural graphite, but also has light weight, porous, high surface activity, high conductivity and good heat transfer and heat insu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/225C01B32/16
CPCC01B2202/00C01B2204/00C01P2004/03
Inventor 赵建国邢宝岩古玲潘启亮屈文山杜雅琴王海青
Owner SHANXI DATONG UNIV
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