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Preparation method of carboxyl nitrile rubber composite membrane 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 poor shielding effect and low conductivity, achieve excellent performance, increase fill factor, and reduce resistance Effect

Inactive Publication Date: 2019-08-23
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of carboxylated nitrile rubber composite film for electromagnetic shielding of the present embodiment, the steps are as follows:

[0022] (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;

[0023] (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;

[0024] (3) Cast the film casting solution in step (2) onto a glass plate, scrape it into a liquid film with a thickness of 600 microns with a scraper, and immerse the glass plate with the liquid film in 50 gra...

Embodiment 2

[0027] A kind of preparation method of carboxylated nitrile rubber composite film for electromagnetic shielding of the present embodiment, the steps are as follows:

[0028] (1) Add 1.5 grams of nano-carbon black to 8.5 grams of a 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;

[0029] (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;

[0030] (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 gra...

Embodiment 3

[0033] A kind of preparation method of carboxylated nitrile rubber composite film for electromagnetic shielding of the present embodiment, the steps are as follows:

[0034] (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;

[0035] (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;

[0036](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 1...

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Abstract

The invention relates to the technical field of functional material preparation, and in particular relates to a preparation method of a carboxyl nitrile rubber composite membrane 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, carrying out film coating, immersing the obtained film into a solution containing copper sulfate for curing, and adding a sodium thiosulfate water solution into the copper sulfate solution after the film is formed, and carrying out heating for a reaction to generate copper sulfide by adopting a chemical bath method to finally obtain the carboxyl nitrile rubber composite film for electromagnetic shielding. The copper sulfate prepared by the method not only grows on the surface of the nitrile rubber, but also is grown and polymerized in the inner part, so that the formed copper sulfate not only can cover the surface of a nitrile rubber substrate film, but also can penetrates into the inner part of the film, so that effective adsorption of copper sulfide is really 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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