Carbon nanotube sponge and preparation method thereof

A carbon nanotube sponge and carbon nanotube technology, applied in the field of carbon nanotube sponge and its preparation, can solve the problems that the carbon nanotube sponge is not a complete elastic body and limit applications, and achieve the effect of easy industrialization and cost reduction

Active Publication Date: 2016-02-17
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon nanotube sponge obtained by CVD is not completely elastic, which limits its further application.

Method used

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  • Carbon nanotube sponge and preparation method thereof
  • Carbon nanotube sponge and preparation method thereof
  • Carbon nanotube sponge and preparation method thereof

Examples

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preparation example Construction

[0025] Please refer to figure 1 , the embodiment of the present invention provides a kind of preparation method of carbon nanotube sponge, comprising:

[0026] Step 1, preparing a carbon nanotube raw material, the carbon nanotube raw material is directly scraped from a carbon nanotube array.

[0027] The carbon nanotube raw material is composed of a plurality of carbon nanotubes, and the carbon nanotubes include single-wall carbon nanotubes, double-wall carbon nanotubes or multi-wall carbon nanotubes. The diameter of carbon nanotubes is 20 nanometers to 30 nanometers. The length of the carbon nanotubes is greater than 100 microns, preferably, the length of the carbon nanotubes is greater than 300 microns. The carbon nanotubes are preferably carbon nanotubes with a pure surface without impurities and without any chemical modification. It is understood that the presence of impurities or chemical modification can destroy the force between carbon nanotubes. The preparation met...

Embodiment 1

[0040] Provide a super-parallel array of carbon nanotubes, the carbon nanotubes in the array of carbon nanotubes have a diameter of 20 nanometers and a length of 300 microns; scrape 200 milligrams of the carbon nanotube arrays, add it to 400 milliliters of ethanol with power Ultrasonic stirring with 500 watts of ultrasonic waves for 30 minutes forms a floc structure; washes the floc structure; puts the washed floc structure into a freeze dryer, and rapidly cools to -60°C; vacuumizes to About 30pa, at this time, at the same time, heat up to -25°C and dry for 2 hours; heat up to -20°C, dry for 2 hours; heat up to -15°C, dry for 2 hours; heat up to -10°C, dry for 2 hours; heat up to - 5°C, dry for 2 hours; heat up to 0°C, dry for 2 hours; heat up to 5°C, dry for 2 hours; heat up to 10°C, dry for 2 hours; heat up to 15°C, dry for 2 hours; Freeze dryer inlet valve, take out the sample, obtain the carbon nanotube sponge preform; transfer the carbon nanotube sponge preform into a rea...

Embodiment 2

[0042] It is basically the same as Example 1, except that the deposition time is 30 minutes. The mass percent content of the carbon deposit layer in the obtained carbon nanotube sponge is about 40%.

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Abstract

The invention relates to a preparation method of a carbon nanotube sponge. The method includes preparing a carbon nanotube raw material by scraping one carbon nanotube array directly; adding the carbon nanotube raw material into an organic solvent, and conducting ultrasonic oscillation to form a flocculent structure; washing the flocculent structure; in vacuum environment, freeze-drying the flocculent structure after washing to obtain a carbon nanotube sponge preform; and conducting carbon deposition on the carbon nanotube sponge preform to obtain the carbon nanotube sponge. The invention also relates to the carbon nanotube sponge obtained through the above method.

Description

technical field [0001] The invention relates to a carbon nanotube sponge and a preparation method thereof. Background technique [0002] Since the Japanese scientist Sumio Iijima first discovered carbon nanotubes (CarbonNanotube, CNT) in 1991, nanomaterials represented by carbon nanotubes have attracted great attention for their unique structures and properties. In recent years, with the continuous deepening of research on carbon nanotubes and nanomaterials, their broad application prospects continue to emerge. [0003] However, in general, the prepared carbon nanotubes have a microscopic structure, which is powdery or granular macroscopically, which is not conducive to the macroscopic application of carbon nanotubes. Therefore, the assembly of carbon nanotubes into macroscale structures is of great significance for the macroscopic applications of carbon nanotubes. [0004] In the prior art, the macroscopic carbon nanotube structure mainly includes carbon nanotube sponge. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
CPCC01B32/168B01J20/205B01J21/185C02F1/283C02F2101/32C23C16/045C23C16/26C23C16/48
Inventor 罗姝王佳平姜开利范守善
Owner TSINGHUA UNIV
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