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A preparation method of multi-walled carbon nanotube/copper sulfide composite electromagnetic shielding film

A technology of multi-walled carbon nanotubes and electromagnetic shielding films, applied in the fields of magnetic field/electric field shielding, electrical components, etc., can solve the problems of high filling amount, reduced toughness of composite materials, unfavorable processing and molding of composite materials, etc. The effect of electrical conductivity and excellent electromagnetic shielding performance

Active Publication Date: 2021-05-04
海宁市徐达特种薄膜有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Functional nanofillers can not only provide multifunctional properties for polymers, but also have a certain reinforcing effect on polymers. However, simply adding these nanofillers usually requires a high filling amount, which is not conducive to the processing and molding of composite materials. At the same time, most nanofillers have Rigidity, will greatly reduce the toughness of the composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the multi-walled carbon nanotube / copper sulfide composite electromagnetic shielding film of the present embodiment, the steps are as follows:

[0025] (1) Add 0.8 g of carboxylated multi-walled carbon nanotubes to 9.2 g of a 70% polyethylenimine crosslinking agent aqueous solution, stir and mix, and then ultrasonically treat for 70 minutes to disperse the multi-walled carbon nanotubes evenly to obtain multi-walled carbon nanotubes Carbon nanotube / polyethylenimine crosslinking agent mixed solution;

[0026] (2) Add 1.1 g of the carboxylated multi-walled carbon nanotube / polyethylenimine crosslinking agent mixed solution prepared in step (1) into 10 g of nitrile rubber emulsion, and stir at 75°C for 2.5 hours to obtain carboxylated Multi-walled carbon nanotubes / polyethylenimine crosslinking agent / carboxylated nitrile latex blend solution, after standing for defoaming, polymer casting solution is obtained;

[0027] (3) Cast the film casting soluti...

Embodiment 2

[0030] The preparation method of the multi-walled carbon nanotube / copper sulfide composite electromagnetic shielding film of the present embodiment, the steps are as follows:

[0031] (1) Add 0.5 g of carboxylated multi-walled carbon nanotubes to 9.5 grams of 80% polyethylenimine crosslinking agent aqueous solution, stir and mix, and then ultrasonically treat for 120 minutes to disperse the multi-walled carbon nanotubes uniformly to obtain carboxylated multi-walled carbon nanotubes. Wall carbon nanotube / polyethylenimine crosslinking agent mixed solution;

[0032] (2) Add 0.5 g of the multi-walled carbon nanotube / polyethylenimine crosslinking agent mixed solution prepared in step (1) to 10 g of nitrile rubber emulsion, stir at 80°C for 2 hours, and obtain multi-walled carbon nanotubes / polyethylenimine crosslinking agent / carboxylated nitrile latex blend solution, after standing for defoaming, polymer casting solution is obtained;

[0033] (3) Cast the film casting solution in ...

Embodiment 3

[0036] The preparation method of the multi-walled carbon nanotube / copper sulfide composite electromagnetic shielding film of the present embodiment, the steps are as follows:

[0037] (1) Add 0.1 g of aminated multi-walled carbon nanotubes to 9.9 g of a 30% polyethylenimine crosslinking agent aqueous solution, stir and mix and then ultrasonically treat for 60 minutes to disperse the aminated multi-walled carbon nanotubes evenly, and obtain Multi-walled carbon nanotube / polyethylenimine crosslinking agent mixed solution;

[0038] (2) Add 1.5 g of the mixed solution of aminated multi-walled carbon nanotubes / polyethylenimine crosslinking agent prepared in step (1) into 10 g of nitrile rubber emulsion, and stir at 60°C for 3 hours to obtain aminated multi-walled carbon nanotubes / polyethylenimine crosslinking agent. Wall carbon nanotube / polyethylenimine cross-linking agent / carboxylated nitrile latex blend solution, after standing for defoaming, polymer casting solution is obtained; ...

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Abstract

The invention relates to the technical field of preparation of functional materials, in particular to a preparation method of a multi-walled carbon nanotube / copper sulfide composite electromagnetic shielding film. First, mix multi-walled carbon nanotubes, carboxylated nitrile rubber emulsion and polyethylenimine crosslinking agent solution. After coating, immerse in a solution containing copper sulfate for curing. After molding, add sodium thiosulfate to the copper sulfate solution. Aqueous solution, heat up by chemical bath method to generate copper sulfide, and finally obtain multi-walled carbon nanotube / copper sulfide composite electromagnetic shielding film. The copper sulfate prepared by this method not only grows on the surface of the nitrile rubber, but also grows and polymerizes inside, so that the formed copper sulfate can not only cover the surface of the nitrile rubber matrix film, but also penetrate into the inside of the film, truly completing the copper sulfide process. The effective adsorption makes the composite material have excellent electromagnetic shielding performance.

Description

technical field [0001] The invention relates to the technical field of preparation of functional materials, in particular to a preparation method of a multi-walled carbon nanotube / copper sulfide composite electromagnetic shielding film. Background technique [0002] With the rapid development of the electronics industry and the increasing popularity of various commercial and household communication equipment and electronic products, the electromagnetic radiation generated by these products will fill the space with electromagnetic waves of different wavelengths and frequencies, making electromagnetic radiation pollution more and more serious. Electromagnetic radiation will not only interfere with communication equipment such as radio and television, but also affect human health. If the human body is exposed to electromagnetic radiation for a long time, the nervous system, cardiovascular system, endocrine system, reproductive system, and immune system will be damaged to varying...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L13/00C08K3/04C08K3/30C08J5/18H05K9/00
CPCC08J5/18C08J2313/00C08K2003/3009C08K2201/011C08K3/041H05K9/0081
Inventor 潘玮刘忠柱赵尧敏崔铁兵王坤李英华
Owner 海宁市徐达特种薄膜有限公司
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