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A kind of flexible and stretchable electromagnetic shielding film and preparation method thereof

An electromagnetic shielding and flexible technology, which is applied in the field of flexible and stretchable electromagnetic shielding film and its preparation, can solve the problems of high price, poor conductivity and limited use, and achieve the effect of low cost, good conductivity and clean surface

Active Publication Date: 2021-12-24
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gold powder and silver powder have the highest conductivity and good chemical stability, but they are expensive, so that their use is limited
Carbon black and graphite powder are used as conductive fillers, which have good dispersion and low price, but poor conductivity
On the other hand, the currently developed electromagnetic shielding materials are difficult to meet the characteristics of "thin, light, wide, and strong" required by modern electromagnetic shielding materials due to the limitations of material composite technology and material physical properties. Therefore, it is urgent to develop Stretchable electromagnetic shielding material with high electromagnetic shielding performance, good flexibility, thinness and durability

Method used

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  • A kind of flexible and stretchable electromagnetic shielding film and preparation method thereof
  • A kind of flexible and stretchable electromagnetic shielding film and preparation method thereof
  • A kind of flexible and stretchable electromagnetic shielding film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0057] The present embodiment provides a flexible and stretchable electromagnetic shielding film (such as figure 1 ), including a magnetic metal nanochain layer 102 and a flexible and stretchable resin layer 103. Prepared by the following method.

[0058] (1) Prepare a nickel chloride solution with a concentration of 0.5mol / L, add complexing agent sodium citrate (45mmol / L), nucleating agent chloroplatinic acid (0.1mmol / L), and adjust the pH value to 12.5 by alkaline solution ;

[0059] (2) prepare the hydrazine hydrate solution of 0.5mol / L, adjust the alkali solution to adjust the pH value to 12.5;

[0060] (3) After the solution obtained in the above steps is mixed in equal volumes, it is placed in a reaction vessel and reacted for 45 minutes at 50° C. After stopping the reaction, it is washed with water and replaced with a solvent to obtain a nickel nanochain water dispersion with a concentration of 5 mg / mL;

[0061] (4) the nickel nano chain dispersion liquid of gained i...

Embodiment 2

[0065] This embodiment provides a flexible and stretchable electromagnetic shielding film. Prepared by the following method.

[0066] (1) Prepare a cobalt chloride solution with a concentration of 0.6mol / L, add complexing agent sodium citrate (50mol / L), nucleating agent chloroplatinic acid (0.3mmol / L), and adjust the pH value to 12.0 by alkali solution ;

[0067] (2) prepare the hydrazine hydrate solution of 0.6mol / L, adjust the alkali solution to adjust the pH value to 12.0;

[0068] (3) After mixing equal volumes of the solutions obtained in the above steps, place them in a reaction vessel and react at 60° C. for 60 minutes. After stopping the reaction, wash with water and replace with a solvent to prepare a cobalt nanochain aqueous dispersion with a concentration of 6 mg / mL;

[0069] (4) the obtained cobalt nanochain dispersion liquid is coated on the surface of the stainless steel substrate by the method of roller coating and dried;

[0070] (5) Polyurethane elastomer r...

Embodiment 3

[0073] This embodiment provides a flexible and stretchable electromagnetic shielding film. Prepared by the following method.

[0074] (1) preparation concentration is the nickel sulfate solution of 0.25mol / L, the cobalt sulfate solution of 0.25mol / L adds complexing agent sodium citrate (37.5mmol / L), nucleating agent chloroauric acid (0.2mmol / L), Adjust the pH value to 12.5 by alkaline solution;

[0075] (2) prepare the hydrazine hydrate solution of 0.5mol / L, adjust the alkali solution to adjust the pH value to 12.5;

[0076] (3) After mixing equal volumes of the solutions obtained in the above steps, place them in a reaction vessel and react at 50° C. for 30 minutes. After stopping the reaction, wash with water and replace with a solvent to prepare a nickel-cobalt nanochain ethanol dispersion with a concentration of 3 mg / mL;

[0077] (4) the obtained nickel-cobalt alloy nano chain dispersion liquid is coated on the surface of the glass substrate by air spraying and dried;

...

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Abstract

The invention relates to a flexible and stretchable electromagnetic shielding film and a preparation method thereof. The preparation method of the flexible and stretchable electromagnetic shielding film includes the following steps: S1: mixing a mixed solution obtained by mixing a magnetic metal salt solution, a complexing agent and a nucleating agent with a hydrazine hydrate solution, and hydrothermally React for 15-12 minutes, wash with water, and replace the solvent to obtain a dispersion of magnetic metal nanochains; S2: apply the dispersion of magnetic metal nanochains on the substrate and dry; S3: coat the substrate coated with the dispersion of magnetic metal nanochains The fabric can stretch the resin, and after curing and molding, the substrate is peeled off to obtain the flexible and stretchable electromagnetic shielding film. The preparation method provided by the invention has simple process and low cost; the prepared electromagnetic shielding film has good conductivity, uniform dispersion, good stretchability and excellent electromagnetic shielding performance.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding materials, in particular to a flexible and stretchable electromagnetic shielding film and a preparation method thereof. Background technique [0002] With the rapid development of microwave and electronic engineering technology, electromagnetic wave interference and pollution have aroused widespread concern, so the importance of electromagnetic shielding materials is becoming more and more prominent. In the military field, with the special needs of new military reforms and high-tech information warfare, the detection and early warning capabilities of modern radar waves are constantly improving, and the survival of aircraft, missiles and other weapons and equipment is facing increasingly serious threats; Due to electromagnetic interference, it cannot work, and electromagnetic wave radiation can cause mental retardation in newborns through thermal effects and cumulative effects, affect human...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L53/02C08L75/04C08L83/04C08K3/08C08K7/00B22F9/24B82Y40/00H05K9/00
CPCC08J5/18H05K9/0081B22F9/24B82Y40/00C08K2201/011C08K2201/01C08J2353/02C08J2375/04C08J2383/04C08K7/00C08K2003/0862C08K2003/0843C08K2003/0856
Inventor 吴铛杨晓琳王康梁俊贤
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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