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Preparation method of flexible regenerated carbon fiber cellulose-based electromagnetic shielding film and product thereof

An electromagnetic shielding, cellulose-based technology, applied in the field of preparation of cellulose-based electromagnetic shielding films, can solve the problems of low absorption effect of electromagnetic shielding materials, electromagnetic wave radiation pollution, high density, etc., and achieves improved electromagnetic shielding efficiency and flexibility. Effect of inner specific surface area and high specific surface area

Inactive Publication Date: 2021-11-19
衡阳华灏新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the electromagnetic wave radiation pollution existing in the existing technology, the existing electromagnetic shielding materials have defects such as low absorption effect, high density, and low flexibility, and improve the recycling and reuse of recycled carbon fibers, control and optimize the morphology and electromagnetic properties

Method used

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  • Preparation method of flexible regenerated carbon fiber cellulose-based electromagnetic shielding film and product thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Weigh 0.02 mol Tris, deionized water was added, dissolved in the flask, to give 20mmol / L of Tris solution, was added dropwise concentrated hydrochloric acid number pH is adjusted to about 8.5; Tris buffer solution prepared using a solution concentration of dopamine 4mg / mL after taken out, at room temperature regenerated chopped carbon fibers immersed 30h dopamine solution. Washed with deionized water repeatedly until the filtrate was clear, colorless; after centrifugation placed in a vacuum oven, the oven temperature 70 ℃, drying time 24h. Regenerated carbon fiber surface modification treatment of dopamine.

[0066] Weigh 4mmol ferric nitrate dissolved in 50mL ethanol solution, referred to as a first solution. Weigh 2.4g of polyvinylpyrrolidone (PVP, K30), 0.7g trimesic acid, dopamine recycled carbon fiber modification, was dissolved in 50mL ethanol solution, referred to as the second solution. The first and second solutions were mixed and stirred uniformly after a clea...

Embodiment 2

[0070] Weigh 0.02 mol Tris, deionized water was added, dissolved in the flask, to give 20mmol / L of Tris solution, was added dropwise concentrated hydrochloric acid number pH is adjusted to about 8.5; Tris buffer solution prepared using a solution concentration of dopamine 4mg / mL after taken out, at room temperature regenerated chopped carbon fibers immersed 30h dopamine solution. Washed with deionized water repeatedly until the filtrate was clear, colorless; after centrifugation placed in a vacuum oven, the oven temperature 70 ℃, drying time 24h. Regenerated carbon fiber surface modification treatment of dopamine.

[0071] Weigh 4mmol ferric nitrate dissolved in 50mL ethanol solution, referred to as a first solution. Weigh 2.4g of polyvinylpyrrolidone (PVP, K30), 0.7g trimesic acid, dopamine recycled carbon fiber modification, was dissolved in 50mL ethanol solution, referred to as the second solution. The first and second solutions were mixed and stirred uniformly after a clea...

Embodiment 3

[0076] Weigh 0.02 mol Tris, deionized water was added, dissolved in the flask, to give 20mmol / L of Tris solution, was added dropwise concentrated hydrochloric acid number pH is adjusted to about 8.5; Tris buffer solution prepared using a solution concentration of dopamine 4mg / mL after taken out, at room temperature regenerated chopped carbon fibers immersed 30h dopamine solution. Washed with deionized water repeatedly until the filtrate was clear, colorless; after centrifugation placed in a vacuum oven, the oven temperature 70 ℃, drying time 24h. Regenerated carbon fiber surface modification treatment of dopamine.

[0077] Weigh 4mmol ferric nitrate dissolved in 50mL ethanol solution, referred to as a first solution. Weigh 2.4g of polyvinylpyrrolidone (PVP, K30), 0.7g trimesic acid, dopamine recycled carbon fiber modification, was dissolved in 50mL ethanol solution, referred to as the second solution. The first and second solutions were mixed and stirred uniformly after a clea...

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Abstract

The invention discloses a preparation method of a flexible regenerated carbon fiber cellulose-based electromagnetic shielding film and a product thereof. The preparation method comprises the following steps: modifying regenerated carbon fibers by dopamine, compounding nano magnetic metal particles, performing self-assembly stacking on the modified regenerated carbon fibers, silver nanowires and cellulose under the conditions of vacuum filtration and magnetic field orientation to form a film, forming an electromagnetic shielding film layer, and performing inorganic hydrophobic surface treatment to obtain the flexible regenerated carbon fiber cellulose-based electromagnetic shielding film. The appearance structure and the electromagnetic performance of the regenerated short carbon fiber prepared by pyrolysis of the waste carbon fiber composite material are explored, regulated and controlled, and the method has the important significance of being green, environmentally friendly and economical under the current target strategy background of carbon peaking and carbon neutrality.

Description

Technical field [0001] The present invention relates to the field of electromagnetic shielding techniques, and more particularly to a method for preparing a cellulose-based electromagnetic shield film of flexible regenerative carbon fibers and a product thereof. Background technique [0002] The rapid development of information transmission and the wide application of electrical equipment bring that there is an ubiquitous electromagnetic wave and a large number of electromagnetic wave radiation in the environment. Electromagnetic pollution has also become a fourth largest contamination source after continuous water pollution, atmospheric pollution, noise pollution. There has been a negative impact on the living environment, health system, business, communications, military, and other fields of the earth. Electromagnetic radiation shielding material absorbs and reflects electromagnetic waves, which can greatly reduce electromagnetic radiation pollution and interference. [0003] C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J7/06C08L1/02C08K9/04C08K7/06C08K9/12C08K3/08C08K9/10C08K3/04
CPCC08J5/18C08J7/06C08J2301/02C08K9/08C08K7/06C08K9/12C08K2201/014C08K2003/0856C08K9/10C08K2201/011C08K2201/01C08K3/04
Inventor 李华熊娟刘河洲陈玉洁刘海
Owner 衡阳华灏新材料科技有限公司
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