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MXene/silver nanowire composite electromagnetic shielding film

A silver nanowire and composite electromagnetic technology, which is applied in the fields of magnetic/electric field shielding, electrical components, metal processing equipment, etc., can solve the problem of low conductivity of electromagnetic shielding films, lack of multiple reflection effects, and impractical electromagnetic shielding effects Requirements and other issues, to achieve excellent electromagnetic shielding performance, improve the effect of multiple reflections, and low cost

Active Publication Date: 2020-05-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these electromagnetic shielding films either have low conductivity or do not have multiple reflection effects, so the overall electromagnetic shielding effect still cannot meet the practical requirements.

Method used

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  • MXene/silver nanowire composite electromagnetic shielding film
  • MXene/silver nanowire composite electromagnetic shielding film
  • MXene/silver nanowire composite electromagnetic shielding film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] First, add the binder polyvinylpyrrolidone (Woke, K-30) to the silver nanowire aqueous solution with a concentration of 1.5 mg / mL (obtained by adjusting the concentration of the AgNW (PVP) dispersion prepared in the silver nanowire preparation example), The mass concentration of the binder is 0.1%, and the mixed solution 1 is obtained by magnetic stirring for 30 minutes. The MXene dispersion (obtained by diluting the MXene dispersion prepared in the MXene preparation example) with a concentration of 0.5 mg / mL was mixed with the mixed solution 1, so that the mass ratio of MXene to silver nanowires was 1, and magnetic stirring was used for 30 minutes. Mixture 2 was obtained. The mixed liquid 2 was subjected to negative pressure suction filtration using a polytetrafluoroethylene filter membrane with a pore size of 0.45 μm, and the thickness of the obtained composite electromagnetic shielding film was 40 μm.

Embodiment 2

[0045] First, add the binder polyvinylpyrrolidone (Woke, K-30) to the silver nanowire aqueous solution with a concentration of 1 mg / mL (obtained by adjusting the concentration of the AgNW (PVP) dispersion prepared in the silver nanowire preparation example), wherein The mass concentration of the binder was 0.1%, and the mixed solution 1 was obtained by magnetic stirring for 30 minutes. The MXene dispersion (obtained by diluting the MXene dispersion prepared in the MXene preparation example) with a concentration of 1 mg / mL was mixed with the mixed solution 1, so that the mass ratio of MXene to silver nanowires was 3, and magnetic stirring was used for 30 minutes to obtain Mixture 2. The mixed liquid 2 was subjected to negative pressure suction filtration using a polytetrafluoroethylene filter membrane with a pore size of 0.45 μm, and the thickness of the obtained composite electromagnetic shielding film was 40 μm.

Embodiment 3

[0047] First, add the binder polyvinylpyrrolidone (Woke, K-30) to the silver nanowire aqueous solution with a concentration of 1.5 mg / mL (obtained by adjusting the concentration of the AgNW (PVP) dispersion prepared in the silver nanowire preparation example), The mass concentration of the binder is 0.1%, and the mixed solution 1 is obtained by magnetic stirring for 30 minutes. The MXene dispersion that concentration is 0.5mg / mL (obtained by diluting the MXene dispersion prepared by the MXene preparation example) is mixed with the mixed solution 1 according to the volume ratio of 1:1, so that the mass ratio of MXene to silver nanowires is 0.33, Magnetic stirring was used for 30 minutes to obtain a mixed solution 2. The mixed liquid 2 was subjected to negative pressure suction filtration using a polytetrafluoroethylene filter membrane with a pore size of 0.45 μm, and the thickness of the obtained composite electromagnetic shielding film was 10 μm.

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Abstract

The invention discloses an MXene / silver nanowire composite electromagnetic shielding film. The composite electromagnetic shielding film is prepared from MXene, silver nanowires and a binder, wherein the mass ratio of the MXene to the silver nanowire is 0.05-20, and the mass dosage of the binder is 0.001-10% of the total mass dosage of the MXene and the silver nanowire; the binder is one or a mixture of more of sodium alginate, polyvinyl alcohol, polyvinylpyrrolidone, chitosan, hydroxypropyl methyl cellulose, carboxymethyl cellulose and sodium carboxymethyl cellulose. The MXene / silver nanowirecomposite electromagnetic shielding film is prepared by the following method which comprises the steps: fully mixing a silver nanowire solution with the binder to obtain a mixed solution 1, and fullymixing the mixed solution 1 with an MXene solution to obtain a mixed solution 2; and performing suction filtration on the mixed solution 2 to form a film, thereby obtaining the MXene / silver nanowire composite electromagnetic shielding film. The obtained composite electromagnetic shielding film has excellent electromagnetic shielding performance; the method is simple and easy to implement and low in cost, and batch production can be achieved.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding and film materials, and relates to an MXene / silver nanowire composite electromagnetic shielding film. Background technique [0002] Electromagnetic radiation is one of the forms of pollution that is harmful to human health and information security. With the popularization of electronic products, electromagnetic radiation pollution is becoming more and more serious, and the shielding of electromagnetic radiation is becoming more and more important. Electromagnetic radiation can be shielded by absorption and reflection. Generally speaking, the better the conductivity of the electromagnetic shielding film, the better the reflection effect on electromagnetic radiation; and the more reflection interfaces in the electromagnetic shielding film, the more electromagnetic waves pass through the film. The more it is absorbed after multiple reflections. Therefore, improving the electrical conductivi...

Claims

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Application Information

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IPC IPC(8): H05K9/00B22F1/00
CPCH05K9/0081B22F1/103B22F1/10
Inventor 叶萃殷宏宇潘军张旺彭永武
Owner ZHEJIANG UNIV OF TECH
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