Carbon nanotubes purified by gas phase damping method, device and purification method

A technology of carbon nanotubes and damping method, which is applied in the direction of carbon nanotubes, nanocarbons, chemical instruments and methods, etc., can solve the problems of serious pollution and high energy consumption, and achieve the effect of uniform particle size, high purity and good shape

Active Publication Date: 2020-06-30
成都莱尔纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high energy consumption and serious pollution of traditional strong acid washing and high-temperature gasification purification of carbon nanotubes, the present invention proposes a device for purifying carbon nanotubes by gas phase damping method with simple operation, low energy consumption, low pollution and easy engineering. Method and carbon nanotube obtained after purification by the method

Method used

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  • Carbon nanotubes purified by gas phase damping method, device and purification method
  • Carbon nanotubes purified by gas phase damping method, device and purification method
  • Carbon nanotubes purified by gas phase damping method, device and purification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 1 As shown, a device for purifying carbon nanotubes by a gas-phase damping method includes a purification chamber 15, a cooling chamber 2 located below the purification chamber 15 and connected thereto, and a filter 1 located above the purification chamber 15 connected thereto;

[0048] A heating furnace 3 arranged outside the purification chamber 15 for heating the purification chamber 15;

[0049] The upper side wall of the purification chamber 15 is provided with a carbon nanotube feeding port 7, the top of the filter 1 is provided with a waste gas port 6, and the bottom of the purification chamber 15 is provided with a purified gas inlet 8, a nitrogen gas inlet valve port 9 and a discharge port. Port 14, the purified gas inlet port 8 and the nitrogen gas inlet valve port 9 are symmetrically arranged on the lower side wall of the purification chamber 15;

[0050] The purification chamber 15 is sequentially provided with an ultrasonic vibrating screen 4 a...

Embodiment 2

[0056] A device for purifying carbon nanotubes by gas-phase damping method is the same as that in Example 1.

[0057] Specifically:

[0058] With 80g nickel base catalyst (carrier is SiO 2 ) synthesized multi-walled carbon nanotubes (marked as example 2), the gas phase damping circle is set to 30 circles, after the carbon nanotube feeding port 7 is loaded into the ultrasonic vibrating screen 4, the carbon nanotube feeding port 7 is closed, and the waste gas port 6 is opened , open the nitrogen gas inlet valve port 9 to feed nitrogen gas, replace and purify the indoor air atmosphere, when the oxygen content is lower than 1%, close the exhaust gas port 6 and the nitrogen gas inlet valve port 9, and then raise the temperature to 1100°C through the heating furnace 3 , the pneumatic ultrasonic vibrating sieve 4 feeds materials to the purification chamber, the carbon nanotube feeding rate of the ultrasonic vibrating sieve is 200g / min, and the nitrogen gas inlet valve 9 is opened at...

Embodiment 3

[0061] A device for purifying carbon nanotubes by gas-phase damping method is the same as that in Example 1.

[0062] Specifically:

[0063] 12g of cobalt-based catalyst (carrier is SiO 2 ) synthesized multi-walled carbon nanotubes (marking as example 3), the gas phase damping circle is set to 22 circles, after the carbon nanotube feeding port 7 is loaded into the ultrasonic vibrating screen 4, the carbon nanotube feeding port 7 is closed, and the waste gas port 6 is opened , open the nitrogen gas inlet valve port 9 to feed nitrogen gas, replace and purify the indoor air atmosphere, when the oxygen content is lower than 1%, close the exhaust gas port 6 and the nitrogen gas inlet valve port 9, and then raise the temperature to 1100°C through the heating furnace 3 , the pneumatic ultrasonic vibrating sieve 4 is fed to the purification chamber, the carbon nanotube feeding rate of the ultrasonic vibrating sieve is 300g / min, and the nitrogen inlet valve 9 is opened at the same tim...

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Abstract

The invention relates to the technical field of carbon nanotube purification, and in particular, relates to a carbon nanotubes purified by a gas phase damping method, a device and a purification method. The method disclosed by the invention comprises three steps of feeding the carbon nanotubes, purifying, cooling and collecting. According to the invention, a high-temperature corrosion-resistant ultrasonic vibrating screen is used for feeding carbon nanotubes, so that quantitative feeding can be realized, and the screen can be prevented from being blocked; a gas-phase damping ring is utilized to increase the resistance of the carbon nanotubes in the descending process of a purification chamber and prolong the contact time of the carbon nanotubes and chlorine, and a residual metal catalyst in the carbon nanotubes reacts under the heating condition to generate chloride, the metal catalyst and the carbon nanotubes are separated, and the purpose of purifying the carbon nanotubes is achieved. The method disclosed by the invention is simple, easy to amplify in productivity, small in pollution, easy to engineer, good in purification effect and suitable for removing various residual metalsin various carbon nanotubes. The purity of the carbon nanotubes is high, and the content of single metal impurities in the carbon nanotubes is less than 20 ppm.

Description

technical field [0001] The invention relates to the technical field of carbon nanotube purification, in particular to a carbon nanotube purified by a gas phase damping method, a device and a preparation method thereof. Background technique [0002] As a one-dimensional nanomaterial, carbon nanotubes are light in weight, perfectly connected in a hexagonal structure, and have many unusual mechanical, electrical, and chemical properties. In recent years, with the in-depth research of carbon nanotubes and nanomaterials, their broad application prospects are constantly showing. Since carbon nanotubes have a hollow structure, they can be used as miniature molds. That is, it can be filled with metals, oxides and other substances to prepare the thinnest nanoscale wires and the like, which will be used in future molecular electronic devices or nanoelectronic devices. It can also make carbon nanotube-reinforced plastics, carbon nanotube-reinforced ceramic composites, metal matrix co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/17
CPCC01B2202/30C01B32/17
Inventor 岳山
Owner 成都莱尔纳米科技有限公司
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