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Explosion preparation of carbon nano tube by using organic explosive substance contaniing nitro-group

A carbon nanotube and explosive technology, applied in the directions of nitrification explosive components, explosives, offensive equipment, etc., can solve the problems of difficult large-scale production, complex equipment, application limitations, etc., and achieve easy large-scale production, simple process flow, high impact The effect of fewer factors

Inactive Publication Date: 2004-09-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The arc method, plasma method and laser method are complex and expensive, and can only be used for laboratory research and are difficult to scale production
The catalytic pyrolysis of hydrocarbons has been studied and used more in recent years, and it is the most promising technology for industrialization, but there are still the following problems: (1) The growth of nanotubes depends on the particle size of the catalyst, which means The particle size of the catalyst needs to be strictly controlled; (2) In order to heat the hydrocarbons to the required temperature (>700°C), an external high-temperature heat source is required; (3) The growth and yield of carbon nanotubes are affected by the temperature and the ratio of hydrocarbons (4) Because the method mainly adopts supported metal catalysts, the existence of the carrier increases the difficulty of purification and separation
[0004] Based on the above reasons, Edwin Kroke and others synthesized carbon nanotubes by detonation method, but the explosive they used was 2,4,6-triazide triazine C 3 N 12 Need special preparation, high cost, not easy to obtain
It can be seen from the molecular formula of this compound that its carbon content is quite low, the weight ratio is only 17.6%, and no other substances are added as carbon sources during the reaction, so that the yield of the produced carbon nanotubes is very low, which greatly limits its application. limit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 2.00 g of picric acid, 0.39 g of phenanthrene and 0.11 g of cobalt acetate, mix them evenly, and put them into a reactor with a volume of 10 ml. It explodes when heated to 313.0°C, the instantaneous pressure reaches 40MPa, and the equilibrium pressure is 20MPa. Cool naturally after stopping heating. The gaseous product was vented and the solid product collected in a sample weighing 0.55 g. Observed under a transmission electron microscope (TEM), the amount of nanotubes accounts for about 90%, the tube length is 0.5-20 μm, and the tube diameter distribution is 20-30 nm.

Embodiment 2

[0021] Weigh 1.00 g of picric acid, 0.26 g of anthracene and 0.26 g of nickel formate, mix them uniformly, and put them into a reactor with a volume of 10 ml. It explodes when heated to 340.7°C, the instantaneous pressure reaches 30MPa, and the equilibrium pressure is 16MPa. Cool naturally after stopping the heating, discharge the gaseous product, collect the solid product, and the weight of the obtained sample is 0.30 g. Observed under a transmission electron microscope (TEM), the nanotube content is about 60%, the length is 0.2-10 μm, and the tube diameter distribution is 20-30 nm.

Embodiment 3

[0023] Weigh 2.70 g of m-dinitrobenzene, 0.26 g of naphthalene and 0.11 g of cobalt carbonate, mix them uniformly, and put them into a reactor with a volume of 10 ml. It explodes when heated to 414.8°C, the instantaneous pressure reaches 60MPa, and the equilibrium pressure is 20MPa. Cool naturally after stopping the heating, discharge the gaseous product, collect the solid product, and the weight of the obtained sample is 0.88 g. Observed under a transmission electron microscope (TEM), the nanotube content is about 50%, the tube length is 0.3-12 μm, and the tube diameter distribution is 30-40 nm.

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Abstract

The metal salt, nitryl-contained organic explosive substance and carbon-contained additive in the weight ratio of 1:3-30:0-5 are mixed, and used as reactant, said reactant can be placed in a sealed stainless steel reactor in the loading density of 0.1-0.5 g / ml, said reactor can be heated to 220-420 deg.c to produce explosion, after the ractor is cooled, and evacuated, and the solid product can be collected. The raw material source of said invention for preparing carbon nano tube is rich.

Description

Technical field: [0001] The invention belongs to a method for preparing carbon nanotubes, in particular to a method for preparing carbon nanotubes by detonating nitro-containing organic explosives. Background technique: [0002] Since the discovery of carbon nanotubes in 1991, carbon nanotubes have shown great application prospects due to their peculiar structure and properties, which have attracted extensive attention in the fields of chemistry, physics and material science. Studies have shown that carbon nanotubes have excellent mechanical properties, their strength is nearly 100 times that of steel, Young's modulus is as high as 1TPa, and they have good bendability. Toughener. The unique electrical properties of carbon nanotubes enable them to be used in large-scale integrated circuits, superconducting wires and other fields. Due to its unique hollow structure, it is currently the best hydrogen storage material and has broad application prospects in fuel cell vehicles a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C06B25/00
Inventor 朱珍平卢怡吴卫泽刘振宇
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI