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In-situ carbon nanotube/nano graphite sheet composite powder and preparation method thereof

A technology of nano-graphite sheets and carbon nanotubes, which is applied in nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve problems such as difficult storage and unstable nano-graphite sheets, and achieve good dispersion performance

Inactive Publication Date: 2010-09-22
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as pointed out above, the nano-graphite sheets prepared by the oxidation expansion method are unstable, and the catalyst used in the chemical vapor deposition method is sodium metal, which is difficult to keep.

Method used

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  • In-situ carbon nanotube/nano graphite sheet composite powder and preparation method thereof
  • In-situ carbon nanotube/nano graphite sheet composite powder and preparation method thereof
  • In-situ carbon nanotube/nano graphite sheet composite powder and preparation method thereof

Examples

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Effect test

Embodiment 1

[0017] Take 10 grams of expandable graphite, put it into an electric furnace that has been heated to 900°C, keep it warm for 10 minutes, and take out the expanded expanded graphite 1. At this time, the volume of the expanded graphite is 150 to 1000 times that of the expandable graphite. Prepare 400 ml of ferric nitrate aqueous solution with 10% solubility, then immerse 10 grams of expanded graphite 1 into this ferric nitrate aqueous solution, ultrasonically treat for 30 minutes, let stand for 8 hours, then filter, dry at 200°C, and then dry at 500°C After roasting, the expanded graphite 2 covered and intercalated with iron oxide is obtained. The expanded graphite 2 is put into a sealed chemical vapor deposition furnace, and the protective gas argon is introduced first. When the temperature of the reaction chamber reaches 400°C, the protective gas is turned off, and then hydrogen gas is introduced. Continue to raise the temperature, when the temperature reaches 700°C, keep the...

Embodiment 2

[0019] Take 10 grams of expandable graphite, put it into an electric furnace that has been heated to 900°C, keep it warm for 10 minutes, and take out the expanded expanded graphite 1. At this time, the volume of the expanded graphite 1 is 150 to 1000 times the volume of the expandable graphite. Prepare 300 milliliters of ferric nitrate ethanol solution with 5% solubility, then immerse 10 grams of expanded graphite 1 in this ferric nitrate ethanol solution, ultrasonically treat for 30 minutes, leave standstill for 8 hours, then evaporate and roast at 500°C to obtain Expanded graphite coated and intercalated with iron oxide 2. Put the expanded graphite 2 into a sealed chemical vapor deposition furnace, and first pass the protective gas nitrogen. When the temperature of the reaction chamber reaches 400°C, the protective gas is turned off, and then hydrogen gas is introduced. Continue to raise the temperature, when the temperature reaches 700 degrees, keep the temperature constan...

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Abstract

The invention discloses in-situ carbon nanotube / nano graphite sheet composite powder and a preparation method thereof. The method for preparing the powder comprises the following steps of: expanding graphite oxide; soaking the graphite oxide in ferric nitrate solution; and filtering or evaporating, drying and roasting. The method is characterized by also comprising the following steps of: placing into a chemical vapor deposition furnace for chemical vapor deposition; and then carrying out the processes of acid washing, filtering, drying and supersonic airflow grinding, wherein in the chemical vapor deposition process, the ratio of the carbon nanotube to nano graphite sheet is that: the carbon nanotube is more than or equal to 10 percent of the total weight and the nano-graphite sheet is more than or equal to 15 percent of the total weight. The in-situ carbon nanotube / nano graphite sheet composite powder has excellent dispersibility.

Description

technical field [0001] The invention belongs to the field of non-metallic nano-carbon materials and preparation techniques. Background technique [0002] Both carbon nanotubes and nano-sized graphite sheets are graphene materials, which have excellent chemical stability, electrical and thermal conductivity and high mechanical properties, and have broad application prospects. Carbon nanotubes have been able to be produced industrially, and the production raw materials mainly come from natural gas, liquefied petroleum gas or acetylene gas. At present, the cost of producing carbon nanotubes is high, and the dispersion performance of the produced carbon nanotubes is poor. For application, the post-processing process is complicated, so the sales price is high, which hinders the large-scale application of carbon nanotubes. The manufacturing techniques of nano-graphite mainly include physical methods and chemical methods. Physical methods include mechanical exfoliation, ultrasoni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00B82B1/00
Inventor 曾效舒
Owner NANCHANG UNIV