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Electromagnetic shielding paper and preparation method thereof

An electromagnetic shielding and lignocellulosic technology, which is applied in the fields of magnetic/electric field shielding, special paper, paper, etc., can solve problems such as difficult dispersion, electromagnetic shielding effectiveness, poor mechanical strength and heat resistance, and easy cracking of metal coatings

Inactive Publication Date: 2018-12-28
佛山豆萁科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing electromagnetic shielding paper mostly uses traditional wave-absorbing materials to achieve the effect of absorbing and shielding electromagnetic waves, such as carbon-based materials of electric loss type, silicon carbide, etc., ferrite or ultra-fine metal of magnetic loss type, patent CN101994275A Disclosed is a complex-phase electromagnetic shielding paper, which is based on undeinked waste paper pulp fibers and dispersed with carbon fibers and carbon black, but its electromagnetic shielding effectiveness, mechanical strength and heat resistance are poor; patent CN103114503A discloses a coated Nickel carbon fiber shielding paper, not only the process is too complicated, but also the metal coating is easy to crack; patent CN107630386A discloses an electromagnetic shielding paper containing carbon nanotubes. Carbon nanotubes have excellent mechanical and electromagnetic properties, and can obtain both mechanical properties and Electromagnetic shielding paper with shielding effect, but carbon nanotubes are easy to aggregate in the form of bundles or entanglements, and are almost insoluble, so it is difficult to disperse well in solvents

Method used

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  • Electromagnetic shielding paper and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, an electromagnetic shielding paper is composed of lignocellulose nanofibers with a mass fraction of 20% and surface-modified MXene with a mass fraction of 80%. The surface-modified MXene includes an MXene carrier and a load layer, and the load layer includes Zinc oxide phase, carbon phase and titanium dioxide phase; the preparation method of the electromagnetic shielding paper includes the preparation of lignocellulose nanofibers, the preparation of surface modified MXene, and the suction filtration molding of mixed slurry, which specifically includes the following steps:

[0031] (1) Preparation of lignocellulose nanofibers

[0032] a. Pretreatment

[0033] Weigh 5g of 60-mesh wood powder, add 400ml of petroleum ether with a boiling range of 60-90°C, reflux at 80°C for 6h, filter out, wash with ethanol, and dry by volatilization at room temperature, add 300ml of deionized water, 7ml of glacial acetic acid, sodium chlorite 10g, 80 ℃ constant tempera...

Embodiment 2

[0046] In this embodiment, an electromagnetic shielding paper is composed of lignocellulose nanofibers with a mass fraction of 40% and surface-modified MXene with a mass fraction of 60%. The surface-modified MXene includes an MXene carrier and a load layer, and the load layer Including zinc oxide phase, carbon phase and titanium dioxide phase; the preparation method of the electromagnetic shielding paper includes the preparation of lignocellulose nanofibers, the preparation of surface modified MXene, and the suction filtration molding of mixed slurry, specifically including the following steps:

[0047] (1) Preparation of lignocellulose nanofibers

[0048] a. Pretreatment

[0049] Weigh 5g of 60-mesh wood powder, add 400ml of petroleum ether with a boiling range of 60-90°C, reflux at 80°C for 6h, filter out, wash with ethanol, and dry by volatilization at room temperature, add 300ml of deionized water, 7ml of glacial acetic acid, sodium chlorite 10g, 80 ℃ constant temperature...

Embodiment 3

[0062] In this embodiment, an electromagnetic shielding paper is composed of lignocellulose nanofibers with a mass fraction of 60% and surface-modified MXene with a mass fraction of 40%. The surface-modified MXene includes an MXene carrier and a load layer, and the load layer Including zinc oxide phase, carbon phase and titanium dioxide phase; the preparation method of the electromagnetic shielding paper includes the preparation of lignocellulose nanofibers, the preparation of surface modified MXene, and the suction filtration molding of mixed slurry, specifically including the following steps:

[0063] (1) Preparation of lignocellulose nanofibers

[0064] a. Pretreatment

[0065] Weigh 5g of 60-mesh wood powder, add 400ml of petroleum ether with a boiling range of 60-90°C, reflux at 80°C for 6h, filter out, wash with ethanol, and dry by volatilization at room temperature, add 300ml of deionized water, 7ml of glacial acetic acid, sodium chlorite 10g, 80 ℃ constant temperature...

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Abstract

The invention relates to electromagnetic shielding paper and a preparation method thereof. The electromagnetic shielding paper is prepared from 20%-60% by mass of lignocellulose nanofibers and 40%-80%by mass of surface modified MXene, wherein surface modified MXene comprises an MXene supporter and a supported layer, and the supported layer comprises a zinc oxide phase, a carbon phase and a titanium dioxide phase. The electromagnetic shielding paper is prepared from the lignocellulose nanofibers and surface modified MXene by mixing in proportion, suction filtration, rolling and drying, and hasgood mechanical properties and electromagnetic shielding performance.

Description

technical field [0001] The invention relates to the field of special paper, in particular to an electromagnetic shielding paper and a preparation method thereof. Background technique [0002] Electromagnetic radiation, also known as electronic smog, is a phenomenon in which energy is emitted into space in the form of electromagnetic waves. The rapid development of the electronic information industry has greatly promoted the popularization of wireless communication equipment and high-frequency electronic devices, and has also caused increasingly serious electromagnetic interference and electromagnetic radiation. Pollution not only interferes with the normal operation of electronic components, but also poses potential health hazards to the human body. Electromagnetic wave radiation is listed as the fourth largest pollution source after water, air, and noise. Long-term excessive electromagnetic radiation can affect human reproduction, Nervous and immune system damage. [0003]...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H15/02D21H11/00D21H17/00D21J5/00D21H21/14H05K9/00
Inventor 甘坚梅
Owner 佛山豆萁科技有限公司
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