Preparation method and device of carbon nanotube sponge

Abstract

The invention relates to a preparation method for a carbon nanotube sponge. The preparation method comprises the following steps: a, soaking nickel oxide in a citric acid solution with a weight percentage of 10 to 50 percent for 1 to 10 hours, and drying at 200 to 900 DEG C for 0.2 to 1 hour to obtain a nickel oxide carbon catalyst; b, putting the nickel oxide carbon catalyst prepared in step a to a reaction furnace, then introducing nitrogen or inert gas to the reaction furnace via a gas carrier tank, raising the temperature in the reaction furnace to 500 to 900 DEG C via a temperature controller under the protection of nitrogen or inert gas, then enabling a flow ratio of nitrogen introduced into the reaction furnace to propylene introduced into the reaction furnace to (0.05 to 0.5): 1 by regulating a flowmeter of a hydrogen tank and a flowmeter of an propylene tank, reacting for 0.5 to 2 hours, and naturally cooling to room temperature to obtain the carbon nanotube sponge. The invention also provides a method for implementing the preparation method for the carbon nanotube sponge. The carbon nanotube sponge prepared by the preparation method has the dispersibility superior to that of conventional carbon nanotubes, and is high in yield and suitable for batch production. The preparation method and the preparation device also have the characteristics of simpleness and convenience in operation, mild reaction conditions and the like.

Description

【Technical field】

[0001] The invention relates to the preparation of carbon nanotubes, in particular to a method and device for preparing carbon nanotube sponges with simple process, high output and suitable for mass production. 【Background technique】

[0002] Carbon nanotubes have excellent properties such as high specific modulus, high specific strength, and high conductivity. Reinforced materials have received extensive research and attention in recent years. However, in general, the carbon nanotubes obtained have a microscopic structure, which is powdery or granular on a macroscopic level, and has poor dispersion. It is usually necessary to use mechanical damage grinding to disperse or destroy the grafted functional groups of the carbon tube microstructure. Not only the preparation process is complicated, but also the performance of carbon nanotubes cannot be brought out, which limits the application of carbon nanotubes.

[0003] At present, in addition to the powdery ...

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