Directional arrangement method for nickel-supported multi-walled carbon nanotubes

Abstract

The invention relates to a directional arrangement method for nickel-supported multi-walled carbon nanotubes. The method comprises the following steps of: firstly preparing a nickel nitrate aqueous solution to prepare the nickel-supported multi-walled carbon nanotubes, and then carrying out directional arrangement, cooling, drying and dicing on polyethylene terephthalate and the nickel-supported multi-walled carbon nanotubes on a magnetic extruding machine so as to make the industrialized and automatic production of the directional arrangement of the nickel-supported multi-walled carbon nanotubes possible; the arrangement of the nickel-supported multi-walled carbon nanotubes in a high polymer substrate is ordered and regular, thereby the physical chemical properties and the mechanical property of the high polymer substrate are effectively increased; and the method has the advantages of advanced process, detailed and accurate data, capability in industrialized continuous production, high production efficiency and good product quality, and is a very ideal directional arrangement method for the nickel-supported multi-walled carbon nanotubes.

Description

technical field [0001] The invention relates to a method for directional arrangement of nickel-loaded multi-walled carbon nanotubes, which belongs to the technical field of directional arrangement methods and equipment for inorganic carbon materials in a high polymer matrix. Background technique [0002] Carbon nanotubes have a unique structure and high aspect ratio, and have excellent chemical and physical properties. The large aspect ratio and high surface energy of carbon nanotubes are easy to agglomerate and entangle in the polymer matrix, which not only fails to enhance the effect, but also forms stress concentration points, resulting in carbon nanotube / polymer composites Therefore, how to realize the uniform dispersion and orientation of carbon nanotubes in the polymer matrix has become a difficult point in the field of nano functional composite material processing. [0003] At present, in order to realize the directional arrangement of carbon nanotubes in the polymer...

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Problems solved by technology

[0002] Carbon nanotubes have a unique structure and high aspect ratio, and have excellent chemical and physical properties. The large aspect ratio and high surface energy of carbon nanotubes are easy to agglomerate and entangle in the polymer matrix, which not only fails to enhance the effect, but also forms stress concentration points, resulting in carbon nanotube / polymer composites Therefore, how to achieve the uniform dispersion and orientation of carbon nanotubes in the polymer matrix has become a difficult point in the field of nano-functional composite materials processing.

[0003] At present, in order to realize the directional arrangement of carbon nanotubes in the polymer matrix, the methods include mechanical stretching, electric field method and magnetic field method, etc., for example: Ajayan et al. 200nm thin slices, the carbon nanotubes are arranged by the mechanical force of the slice, and the carbon nanotube composite material of the orientation is obtained for the first time; into a suspension, uniaxially stretched from 100°C to room temperature 25°C, and realized the alignment of multi-walled carbon nanotubes in thermoplastic polymers; for example, Haggenmueller et al. Composites were stretched to realize the oriented arrangement of single-walled carbon nanotubes; for example, Dai et al. used repeated mechanical stretching to achieve uniform dispersion and oriented arrangement of single-walled carbon nanotubes; for example, Chen et al. Realized the directional arrangement of single-walled carbon nanotubes; for example, Miguel et al. covered multi-walled carbon nanotubes with magnetic materials, and realized the directional arrangement of carbon nanotubes through the action of an external magnetic field; Li Weixue et al. injected carbon nanotubes and polymers into cylinders In the body, the piston is used to pass through the laminar flow field, magnetic field, and compression to make the carbon nanotubes align in the polymer; the above research is only a preliminary discussion, some are not suitable for application in production practice, and some cannot be industrialized. The process is complex and the application range is narrow

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