Preparation method of line heat source

Abstract

The invention relates to a preparation method of a line heat source, which concretely comprises the following steps of: providing a carbon nano pipe structure; providing a line-shaped supporting structure; arranging the carbon nano pipe structure at the surface of the line-shaped supporting structure; forming two electrodes at intervals and forming the electric connection of the two electrodes and the carbon nano pipe structure respectively; and providing a prefabricated body of a base material and compounding the prefabricated body of the base material and the carbon nano pipe structure to form a carbon nano pipe composite structure.

Description

technical field [0001] The invention relates to a preparation method of a linear heat source, in particular to a preparation method of a carbon nanotube-based linear heat source. Background technique [0002] Heat sources play an important role in people's production, life and scientific research. Wire heat source is a kind of heat source, which has a wide range of applications in industrial fields, scientific research fields, or life fields, such as electric heating tubes, electric blankets, infrared therapeutic instruments, and electric heaters. [0003] The existing linear heat source usually includes a linear heating element (such as a resistance wire, etc.) and two electrodes, the two electrodes are arranged at intervals and electrically connected to both ends of the linear heating element. When a voltage or current is applied to the linear heating element through the two electrodes, the linear heating element generates Joule heat, and the heat is radiated outward at a...

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Problems solved by technology

[0004] However, the heating wire made of metal, alloy or carbon fiber has the following disadvantages: first, the heat generated by the heating wire radiates outwards at ordinary wavelengths, and its electrothermal conversion efficiency is not high, which is not conducive to saving energy. Cotton thread coated with far-infrared paint to improve electrothermal conversion efficiency

Second, the size of carbon fiber is not small enough, which is not conducive to the application of micro heat sources. When the diameter of the metal wire is small, the strength is very low and easy to break, which is not conducive to the application of micro heat sources.

Third, the mass of the heating wire is relatively large, which is not conducive to the lightening of the heat source

However, the carbon nanotube filaments in this patent document are used for luminescence. Since the mechanical strength and toughness of the directly obtained pure carbon nanotube filaments are not good enough, they are easily destroyed during use, thus limiting the use of carbon nanotube filaments. Use range, can not be used directly for heat source

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