Method for preparing carbon nanotube electromagnetic shielding film

A technology of carbon nanotubes and electromagnetic shielding, applied in the fields of magnetic/electric field shielding, conductive coatings, electrical components, etc., can solve the problems of difficulty in greatly improving performance, poor dispersion of carbon nanotubes, and low content of carbon nanotubes. Achieve the effects of modifying electromagnetic shielding performance, improving shielding performance and improving conductivity

Inactive Publication Date: 2019-05-07
韩振
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Method for preparing carbon nanotube electromagnetic shielding film

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Effect test

Embodiment 1

[0021] A method for preparing a carbon nanotube electromagnetic shielding film is characterized in that it comprises the following steps, and the following raw materials are calculated in parts by weight:

[0022] (1) Filling ferrocene-methanol solution to prepare carbon nanotube shielding film:

[0023] Dissolve 40 parts of ferrocene in methanol 1:5, and ultrasonically disperse for 10 minutes to obtain a filling solution. The reactor is heated to 1100°C, the carbon source rate is adjusted to deposit carbon nanotubes on the nozzle base, and the filling solution is introduced to prepare high-speed iron A large amount of carbon nanotube macroscopic body, the carbon source and fillers are quickly vaporized, and a high-shielding film is prepared by self-deposition technology;

[0024] Among them, the feed rate of the filling solution is 0.5ml / min;

[0025] (2) Preparation and coating of electromagnetic shielding paint:

[0026] Mix 10 parts of resin EPO, 4 parts of solvent xylene, 4 parts ...

Embodiment 2

[0030] A method for preparing a carbon nanotube electromagnetic shielding film is characterized in that it comprises the following steps, and the following raw materials are calculated in parts by weight:

[0031] (1) Filling ferrocene-methanol solution to prepare carbon nanotube shielding film:

[0032] Dissolve 50 parts of ferrocene in methanol 1:10, and ultrasonically disperse for 20 minutes to obtain a filling solution. The reaction furnace is heated to 1200°C, the carbon source rate is adjusted to deposit carbon nanotubes on the nozzle base, and the filling solution is introduced to prepare high-speed iron A large amount of carbon nanotube macroscopic body, the carbon source and filler are quickly vaporized, and a high-shielding film is prepared by self-deposition technology;

[0033] Among them, the feed rate of the filling solution is 1ml / min;

[0034] (2) Preparation and coating of electromagnetic shielding paint:

[0035] Mix 15 parts of resin EPO, 7 parts of solvent xylene, 7...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C09D125/08C09D7/61C09D5/24
Inventor 韩振
Owner 韩振
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