Electromagnetic shielding material for electroless cobalt plating of modified carbon nanotubes and preparation method of electromagnetic shielding material

Abstract

The invention discloses an electromagnetic shielding material for electroless cobalt plating of modified carbon electroless and a preparation method of the electromagnetic shielding material, which belong to the technical field of preparation of nanomaterials. The preparation method includes acidification pretreatment and pretreatment of multi-walled carbon nanotubes, and successfully coating metallic cobalt to the surfaces of the multi-walled carbon nanotubes. By using the material, original poor magnetic property of the multi-walled carbon nanotubes can be improved evidently, and magnetic loss can be increased evidently. In addition, the metallic cobalt has high Curie temperature and has magnetism even under high temperature. Therefore, the multi-walled carbon nanotubes coated with the metallic cobalt can serve as a high-temperature-resistant electromagnetic shielding material.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and specifically relates to an electroless cobalt-plating modified carbon nanotube electromagnetic shielding material and a preparation method thereof. Background technique [0002] Carbon nanotubes, also known as bucky tubes, are known as the "king of nanometers". They are seamless tubular layer structures formed by curling single-layer or multi-layer graphite sheets. 2 A cylindrical surface composed of hexagonal planes formed by hybridization and the surrounding three carbon atoms, each layer is constructed by a large ∏ bond electron system, including a hexagonal ring and a pentagonal ring at the top, similar to a hexagonal The polygonal lattice curls into a tubular microstructure. A constant distance of about 0.34 nm is maintained between layers. Carbon nanotubes are currently the strongest and thinnest fibers with a very high aspect ratio (a diameter of a few tenths of nano...

AI Technical Summary

Problems solved by technology

Carbon nanotubes are nano-sized materials with very small size and large specific surface area. It is difficult to achieve metal deposition and plating on the surface of carbon nanotubes by electroless plating; at the same time, the large aspect ratio of carbon nanotubes determines The dispersion of carbon nanotubes is poor, and they are easily agglomerated. It is also difficult to ensure the dispersion of carbon nanotubes during the electroless plating process.

At present, the research on electroless plating of carbon nanotubes mainly focuses on metal Ni or Ni-P alloy to improve the electromagnetic properties of composite materials, and there are relatively few studies on magnetic properties.

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