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

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...

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.