Method for preparing carbon nanotube electromagnetic shielding film

Abstract

The invention discloses a method for preparing a carbon nanotube electromagnetic shielding film, which comprises the steps of dissolving ferrocene in methanol, heating a reaction furnace, adjusting the rate of a carbon source to deposit carbon nanotubes on an orifice substrate, introducing a filling solution, preparing carbon nanotube macro-bodies with high iron content, quickly gasifying the carbon source and a filler, and preparing a film with high shielding performance through a self-deposition technology; mixing resin, solvent xylene, butyl acetate and an anti-settling agent, quickly dispersing, then slowly adding iron-nickel alloy powder, graphene-loaded nickel magnetic composite powder and a graphene oxide-ferriferrous oxide hybrid material, then dispersing, adding an anti-foaming agent, a leveling agent and a curing agent, and dispersing to obtain a uniform electromagnetic shielding coating; and thinly and uniformly coating the surface of the film with high shielding performancewith the coating, and naturally drying to obtain the electromagnetic shielding film.

Description

Technical field [0001] The invention belongs to the field of electromagnetic shielding films, and in particular relates to a method for preparing carbon nanotube electromagnetic shielding films. Background technique [0002] With the development of science and technology, the wide application of various electromagnetic radiation systems such as mobile phones, computers, televisions, etc. has brought about increasingly serious electromagnetic pollution problems, which have brought huge challenges to the application and design of various electronic systems. More and more disasters and accidents have been brought to people's lives. Therefore, the development of high-efficiency shielding materials has become an important means to reduce electromagnetic interference and solve electromagnetic problems, and is a key research area of ​​current materials science. [0003] As the country and the government pay more and more attention to issues such as environmental pollution and resource wa...

AI Technical Summary

Problems solved by technology

[0005] The hottest research on magnetic shielding materials is conductive composite materials filled with carbon nanotubes and lightweight polymer materials, but its performance is still difficult to be greatly improved at the current stage, and it is maintained at about 20dB

The reason is that the dispersion performance of carbon nanotubes is poor, resulting in low content of carbon nanotubes in the composite material, uneven distribution, and poor electrical conductivity.

However, due to the length of the tubes, carbon nanotubes are intertwined and bundled, making it difficult to uniformly disperse them.

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