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Method for preparing light-cured electromagnetic shielding composite material based on multi-arm carbon nanotube

A technology of multi-arm carbon nanotubes and electromagnetic shielding, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of poor electromagnetic shielding performance, achieve strong absorption capacity, strong attenuation of electromagnetic wave energy, and reduce skin depth effect Effect

Inactive Publication Date: 2018-12-25
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above situation, the object of the present invention is to provide a method for preparing a light-cured electromagnetic shielding composite material based on multi-armed carbon nanotubes to solve the problem of poor electromagnetic shielding performance in the prior art

Method used

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  • Method for preparing light-cured electromagnetic shielding composite material based on multi-arm carbon nanotube
  • Method for preparing light-cured electromagnetic shielding composite material based on multi-arm carbon nanotube

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preparation example Construction

[0030] Embodiments of the present invention provide a method for preparing a light-cured electromagnetic shielding composite material based on multi-armed carbon nanotubes, including:

[0031] Uniformly disperse carbon nanotubes in tetrahydrofuran;

[0032] Add methyl vinyl silicone resin and silicone resin curing agent to the dispersed carbon nanotubes, and then stir at a speed of 800-1000 rpm until the methyl vinyl silicone resin is completely dissolved in tetrahydrofuran to obtain a mixed solution;

[0033] Ultrasonic vibration is performed on the mixed solution, and then evaporated at a temperature of 65-75°C until the tetrahydrofuran is completely evaporated to obtain a precipitate;

[0034] Dry the sediment;

[0035] The dried precipitate is molded and vulcanized for 30-40 minutes under a pressure of 11-13 MPa and a temperature of 140-160° C. to finally obtain a light-cured electromagnetic shielding composite material.

[0036] The light-cured electromagnetic shielding...

Embodiment 1

[0039] A method for preparing a light-cured electromagnetic shielding composite material based on multi-armed carbon nanotubes, comprising:

[0040] Under the ultrasonic power of 350-400W, the carbon nanotubes are uniformly dispersed in tetrahydrofuran by means of ultrasonic vibration, wherein the outer diameter of the multi-walled carbon nanotubes is 17-20nm;

[0041] Add methyl vinyl silicone resin and silicone resin curing agent to the dispersed carbon nanotubes, wherein the molecular weight of the methyl vinyl silicone resin is 450000-550000 g / mol, and the silicone resin curing agent is 2,3 , 5-two (t-butyl peroxide)-2,5-dimethylhexane, the weight of the silicone resin curing agent is 2.5% of the weight of the methyl vinyl silicone resin, and ensure that the carbon The addition amount of nanotubes is 6wt.% of the total weight of the carbon nanotubes, the methyl vinyl silicone resin, and the silicone resin curing agent, and then stir at a speed of 900rpm until the methyl vi...

Embodiment 2

[0047] A method for preparing a light-cured electromagnetic shielding composite material based on multi-armed carbon nanotubes, comprising:

[0048] Under the ultrasonic power of 350-390W, the carbon nanotubes are uniformly dispersed in tetrahydrofuran by means of ultrasonic oscillation, wherein the outer diameter of the multi-walled carbon nanotubes is 15-22nm;

[0049] Add methyl vinyl silicone resin and silicone resin curing agent to the dispersed carbon nanotubes, wherein the molecular weight of the methyl vinyl silicone resin is 480,000 to 600,000 g / mol, and the silicone resin curing agent is 2,3 , 5-two (t-butyl peroxide)-2,5-dimethylhexane, the weight of the silicone resin curing agent is 2% of the weight of the methyl vinyl silicone resin, and ensure that the carbon The addition of nanotubes is 5wt.% of the total weight of the carbon nanotubes, the methyl vinyl silicone resin, and the silicone resin curing agent, and then stir at a speed of 800 rpm until the methyl vin...

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Abstract

The invention provides a method for preparing a light-cured electromagnetic shielding composite material based on multi-arm carbon nanotubes. The method for preparing the light-cured electromagnetic shielding composite material based on the multi-arm carbon nanotubes includes the steps of dispersing the carbon nanotubes uniformly in tetrahydrofuran; adding methyl vinyl silicone resin and siliconecuring agent to the dispersed carbon nanotubes to be stirred at a rotation speed of 800 -1000 revolutions per minute till the methyl vinyl silicone resin is completely dissolved in the tetrahydrofuranto obtain a mixed solution; conducting ultrasonic vibration of the mixed solution and evaporating at a temperature of 65-75 DEG C till the tetrahydrofuran is completely evaporated to obtain a precipitate; drying the precipitate; molding the dried precipitate and performing vulcanization at a pressure of 11-13 megapascals and a temperature of 140-160 DEG C for 30 to 40 minutes to eventually obtainthe light-cured electromagnetic shielding composite material. The light-cured electromagnetic shielding composite material based on multi-arm carbon nanotubes prepared through the above mentioned method has the advantages of benefiting from the multi-arm carbon nanotubes with excellent electrical conductivity, reducing the skin depth effect of the material, and improving electromagnetic shieldingperformance.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding materials, in particular to a method for preparing a light-cured electromagnetic shielding composite material based on multi-arm carbon nanotubes. Background technique [0002] With the continuous improvement of people's living standards and the continuous acceleration of the pace of life, in order to facilitate our daily life, various equipment such as TVs, computers, refrigerators, microwave ovens, TV relay towers, and mobile phone signal transmitting stations have entered our lives. They not only bring us convenience, but also bring us harm to our bodies. Electromagnetic waves radiated by electronic equipment affect the cardiovascular system, immune and metabolic functions of the human body, and have adverse effects on the human visual system. [0003] Therefore, the development of efficient electromagnetic shielding materials to prevent electromagnetic interference and elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08K3/04H05K9/00
CPCC08K3/041C08K2201/011H05K9/0081C08L83/04
Inventor 刘平张文华代小敏徐锐伍发元邓永强
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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