Super-long carbon nanotube macro fiber and preparation method thereof and application thereof in electric arc

A technology of ultra-long carbon nanotubes and carbon nanotube fibers, which is applied in the field of nanomaterials, and can solve the problem of continuous double-walled carbon nanotube preparation, no contact between electrodes and metal electrodes, and easy oxidation and melting of metal electrodes. problem, to achieve the effect of reducing personal injury, excellent thermal conductivity, and small energy loss

Active Publication Date: 2015-02-25
北京旭江科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A 1 cm long arc in industrial production requires an arc voltage of up to 10,000 V, which is much higher than the human body safety voltage of 36 V, so its application is limited
[0004]In the traditional electrode materials, metal electrodes are dominant, and metals have the following deficiencies as electrode materials: (1) Commonly used metal electrodes, due to their high density , which affects its portability and limits its application in electrode materials; (2) In industrial production, metal electrodes generate the required arc and require high voltage, far exceeding the safe voltage of 36 V for the human body; (3) General metal Compared with carbon electrodes, electrodes have a lower melting point and are difficult to apply in many places; (4) Metal electrodes are easily oxidized and melted during the arc generation process, which reduces conductivity; (5) Metal electrode materials, the required raw materials They are all non-renewable resources, and a large amount of use is a waste of resources
The preparation of double-walled carbon nanotubes in this patent is difficult to be continuous, and the macroscopic size is also limited by the reactor, and it is not proposed as a contact between electrodes and metal electrodes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The macroscopic tubular continuum of carbon nanotubes generated from the reactor mouth is pulled to the pulley in front of the reactor mouth with a glass rod, and the volume fraction of 50% alcohol aqueous solution is sprayed on the generated tubular carbon nanotubes to form soft carbon nanotubes. tube fibers. At the same time, the pulley is driven by the motor, and the prepared carbon nanotube macroscopic fiber is wound on the pulley. Then, tweezers were used to separate the carbon nanotube fibers wound on the pulley one by one to obtain ultra-long carbon nanotube macroscopic fibers with a diameter of 1 mm and a length of 50 mm. Put the obtained carbon nanotube fiber in an evaporating dish, place it in a drying oven, and adjust the temperature to be 120 o C, dry for 30 min. The arc generation process is carried out in a closed shell, and a DC stabilized power supply is used to provide the required DC voltage. First, connect one end of two metal wires with a diameter...

Embodiment 2

[0028] The macroscopic tubular continuum of carbon nanotubes generated from the reactor mouth is pulled to the pulley in front of the reactor mouth with a glass rod, and the volume fraction of 50% alcohol aqueous solution is sprayed on the generated tubular carbon nanotubes to form soft carbon nanotubes. tube fibers. At the same time, the pulley is driven by the motor, and the prepared carbon nanotube macroscopic fiber is wound on the pulley. Then, tweezers were used to separate the carbon nanotube fibers wound on the pulley one by one to obtain ultra-long carbon nanotube macroscopic fibers with a diameter of 1 mm and a length of 50 mm. Put the obtained carbon nanotube fiber in an evaporating dish, place it in a drying oven, and adjust the temperature to be 120 o C, dry for 30 min. The arc generation process is carried out in a closed shell, and a DC stabilized power supply is used to provide the required DC voltage. First, connect one end of two metal wires with a diameter...

Embodiment 3

[0030] The macroscopic tubular continuum of carbon nanotubes generated from the reactor mouth is pulled to the pulley in front of the reactor mouth with a glass rod, and the volume fraction of 50% alcohol aqueous solution is sprayed on the generated tubular carbon nanotubes to form soft carbon nanotubes. tube fibers. At the same time, the pulley is driven by the motor, and the prepared carbon nanotube macroscopic fiber is wound on the pulley. Then, tweezers were used to separate the carbon nanotube fibers wound on the pulley one by one to obtain ultra-long carbon nanotube macroscopic fibers with a diameter of 1 mm and a length of 50 mm. Put the obtained carbon nanotube fiber in an evaporating dish, place it in a drying oven, and adjust the temperature to be 120 o C, dry for 30 min. The arc generation process is carried out in a closed shell, and a DC stabilized power supply is used to provide the required DC voltage. First, connect one end of two metal wires with a diameter...

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PUM

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Abstract

The invention discloses a super-long carbon nanotube macro fiber and a preparation method thereof and application thereof in electric arc, and relates to the technical field of nano materials. The high strength carbon nanotube macro fiber is prepared from carbon nanotube macro tubular continuous body. The carbon nanotube macro fiber under the DC voltage of 20-30V in a closed shell touches a metal electrode to produce a strong electric arc, and the generated electric arc can instantly melt metal electrode tin, aluminum or copper. The carbon nanotube macro fiber is simple and easy in technique, not only can be applied to the field of traditional metal smelting, welding and heat treatment, and application in the strong light source is also more obvious. The carbon nanotube macro fiber has advantages of easily available raw materials, low cost, no pollution to the environment; the product is easy to handle, efficiency is high, equipment is simple, semi continuous operation can be achieved, and the carbon nanotube macro fiber is suitable for mass production.

Description

technical field [0001] The invention relates to a method for preparing ultra-long carbon nanotube macroscopic fibers in the technical field of nanometer materials and its application as an electrode in an arc generator. Background technique [0002] Arcing is a phenomenon in which air conducts electricity, resulting from a strong and long-lasting arc between two electrodes. The formation of arc is the process of dissociation of neutral molecules and atoms between electrodes. When the electrodes are separated, the distance between the electrodes is small and the electric field strength is high. When the electric field strength exceeds 3×10 6 V m -1 When , the electrons on the electrode surface will be pulled out by the electric field force to form free electrons between the two electrodes. The gap between the two electrodes where the arc burns is called the arc gap. After the arc is formed, the high temperature between the arc gap can melt the solid, evaporate the liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12H05B31/06
Inventor 黎业生张伟波吴子平
Owner 北京旭江科技有限公司
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