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Preparation method of carboxyl nitrile rubber composite film for electromagnetic shielding

A technology of carboxylated nitrile rubber and electromagnetic shielding, which is applied in the field of preparation of carboxylated nitrile rubber composite film for electromagnetic shielding, can solve the problems of low conductivity and poor shielding effect, achieve excellent performance, improve conductivity and reduce resistance Effect

Active Publication Date: 2020-06-12
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the carbon black conductive filler is a semiconductor, the conductivity of the formed coating is lower than that of the conductive coating formed by metal fillers, and the shielding effect is poor.

Method used

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  • Preparation method of carboxyl nitrile rubber composite film for electromagnetic shielding

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Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method of carboxylated nitrile rubber composite film for electromagnetic shielding of the present embodiment, the steps are as follows:

[0023] (1) Add 0.5 g of nano-carbon black to 9.5 g of 80% polyethylenimine cross-linking agent aqueous solution, and stir at 90° C. for 2 hours to obtain a mixed solution of nano-carbon black / polyethylenimine cross-linking agent;

[0024] (2) Take 0.5 g of the nano-carbon black / polyethylenimine crosslinking agent mixed solution prepared in step (1) and add it to 10 g of nitrile rubber emulsion, and stir at 80°C for 2 hours to obtain nano-carbon black / polyethylenimine Pyridine crosslinking agent / carboxylated nitrile latex blended solution, after standing for defoaming, polymer casting solution is obtained;

[0025] (3) Cast the film casting solution in step (2) onto a glass plate, and scrape it into a liquid film with a thickness of 600 microns with a scraper, that is, a carbon black / carboxylated nitrile composite...

Embodiment 2

[0028] A kind of preparation method of carboxylated nitrile rubber composite film for electromagnetic shielding of the present embodiment, the steps are as follows:

[0029] (1) Add 1.5 grams of nano-carbon black to 8.5 grams of 30% polyethylenimine cross-linking agent aqueous solution, and stir at 80°C for 3 hours to obtain a mixed solution of nano-carbon black / polyethylenimine cross-linking agent;

[0030] (2) Add 1.5 grams of nano-carbon black / polyethylenimine crosslinking agent mixed solution prepared in step (1) to 10 grams of nitrile rubber emulsion, and stir at 60°C for 3 hours to obtain nano-carbon black / polyethylenimine Pyridine crosslinking agent / carboxylated nitrile latex blended solution, after standing for defoaming, polymer casting solution is obtained;

[0031] (3) Cast the film casting solution in step (3) onto a glass plate, scrape it into a liquid film with a thickness of 700 microns with a scraper, and immerse the glass plate with a liquid film in 50 grams o...

Embodiment 3

[0034] A kind of preparation method of carboxylated nitrile rubber composite film for electromagnetic shielding of the present embodiment, the steps are as follows:

[0035] (1) Add 1.0 g of nano-carbon black to 9.0 g of a 50% polyethylenimine cross-linking agent aqueous solution, and stir at 85° C. for 2.5 hours to obtain a mixed solution of nano-carbon black / polyethylenimine cross-linking agent;

[0036] (2) Add 1.4 grams of nano-carbon black / polyethylenimine crosslinking agent mixed solution prepared in step (1) to 10 grams of nitrile rubber emulsion, and stir at 70°C for 2.5 hours to obtain nano-carbon black / polynitrogen Propidium crosslinking agent / carboxylated nitrile latex blend solution, after standing for defoaming, polymer casting solution is obtained;

[0037] (3) Cast the film casting solution in step (2) onto a glass plate, scrape it into a liquid film with a thickness of 1200 microns with a scraper, and immerse the glass plate with a liquid film in 50 grams of a ...

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Abstract

The invention relates to the technical field of functional material preparation, and concretely relates to a preparation method of a carboxyl nitrile rubber composite film for electromagnetic shielding. The preparation method comprises the following steps: firstly, mixing nano-carbon black, a carboxyl nitrile rubber emulsion and a polyaziridine cross-linking agent solution, coating for preparing afilm, immersing the film into a solution containing copper sulfate for curing, adding an aqueous sodium thiosulfate solution into the copper sulfate solution after molding, heating, and reacting by adopting a chemical bath method to generate copper sulfide, thereby finally obtaining the carboxyl nitrile rubber composite film for electromagnetic shielding. The copper sulfate prepared by the methodnot only grows on the surface of the nitrile rubber, but also grows and polymerizes in the nitrile rubber, so that the formed copper sulfate not only can cover the surface of a nitrile rubber matrixfilm, but also penetrates into the film, the effective adsorption of copper sulfide is truly completed, and the composite material has excellent electromagnetic shielding performance.

Description

technical field [0001] The invention relates to the technical field of preparation of functional materials, in particular to a method for preparing a carboxylated nitrile rubber composite film for electromagnetic shielding. 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 degrees. . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L13/00C08K5/3412C08K3/04
CPCC08J5/18C08J2313/00C08K5/3412C08K3/04C08K2201/011
Inventor 潘玮刘忠柱王艳芝赵尧敏崔铁兵王坤李英华
Owner ZHONGYUAN ENGINEERING COLLEGE
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