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Electromagnetic shielding composite paper and preparation method thereof

A technology of electromagnetic shielding and composite paper, which is applied in the fields of magnetic field/electric field shielding, special paper, synthetic cellulose/non-cellulose material pulp/paper, etc. It can solve the problem of paper conductivity, insufficient mechanical properties, limited preparation efficiency, and manufacturing cost Advanced problems, to achieve good electromagnetic shielding effectiveness, production cost control, and good mechanical properties

Active Publication Date: 2018-03-27
何贞芳
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the technical defects in the prior art that the preparation equipment of electromagnetic shielding composite paper is relatively high, the preparation efficiency is limited, the manufacturing cost is relatively high, and the conductivity and mechanical properties of the paper are insufficient, the present invention proposes a high-efficiency preparation with both flexibility and conductivity. , The preparation method of mechanical electromagnetic shielding composite paper does not require special equipment, and the production cost is controlled. The prepared composite paper has both flexibility, electrical conductivity, good mechanical properties, and controllable shape and resistance, and has good electromagnetic shielding performance

Method used

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  • Electromagnetic shielding composite paper and preparation method thereof

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Effect test

Embodiment 1

[0039] (1) in 10 -5Under the Pa vacuum environment, 5 parts by weight of high-purity nickel powder with a purity greater than 99% and a particle size of 20 nanometers are heated to 1540°C, the heating rate of the high-purity nickel powder is 120°C / min, and the temperature for maintaining the vacuum environment is 600°C. 50 wt. A single-walled carbon nanotube with a length of 10 nanometers. After the carbon nanotube is put in, turn off the vacuum system and wait for 2 hours. The carbon nanotube becomes the crystal nucleus of metallic nickel, and the nickel atoms gather on the surface of the carbon nanotube. The nickel atoms in the vacuum environment are aggregated and precipitated to obtain nickel-coated carbon nanotubes;

[0040] (2) Mix nickel-coated carbon nanotubes with 2.5 parts by weight of deionized water first, and stir to make the carbon nanotubes evenly dispersed in the process control agent, and then add 20 parts by weight of single-layer graphite powder to make the ...

Embodiment 2

[0044] (1) in 10 -4 Under the Pa vacuum environment, 15 parts by weight of high-purity nickel powder with a purity greater than 99% and a particle size of 50 nanometers is heated to 1820 ° C, the heating rate of the high-purity nickel powder is 80 ° C / min, the temperature of the vacuum environment is maintained at 460 ° C, and 50 wt. A mixture of double-walled carbon nanotubes and multi-walled carbon nanotubes with a length of 100 nanometers. After the carbon nanotubes are put in, turn off the vacuum system and wait for 1 hour. The carbon nanotubes become the crystal nucleus of metallic nickel, and the nickel atoms gather in the carbon nanotubes. On the surface of the tube, carbon nanotubes and nickel atoms in the vacuum environment aggregate and settle to obtain nickel-coated carbon nanotubes;

[0045] (2) First mix the nickel-coated carbon nanotubes with 1 part by weight of absolute ethanol, stir to make the carbon nanotubes evenly dispersed in the process control agent, a...

Embodiment 3

[0049] (1) in 10 -2 Under the Pa vacuum environment, 10 parts by weight of high-purity nickel powder with a purity greater than 99% and a particle size of 45 nanometers is heated to 1600°C, the heating rate of the high-purity nickel powder is 100°C / min, the temperature of the vacuum environment is maintained at 500°C, and 50 wt. Surface-activated carbon nanotubes with a length of 20 nanometers. After the carbon nanotubes are put in, turn off the vacuum system and wait for 1.2 hours. The carbon nanotubes become the crystal nucleus of metallic nickel, and the nickel atoms gather on the surface of the carbon nanotubes. Coagulate and settle with nickel atoms in a vacuum environment to obtain nickel-coated carbon nanotubes;

[0050] (2) Mix the nickel-coated carbon nanotubes with 1.5 parts by weight of sodium stearate, and stir to make the carbon nanotubes uniformly dispersed in the process control agent, and then add 15 parts by weight of multilayer graphene to make the graphene ...

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Abstract

The invention provides electromagnetic shielding composite paper which is efficiently prepared and has flexibility, conductivity and mechanical performance and a preparation method thereof. The preparation method comprises the following steps: heating high-purity nickel powder, keeping the temperature of a vacuum environment, charging a carbon nano-tube, obtaining a nickel-cladding carbon nano-tube, mixing and ball milling graphene powder, the nickel-cladding carbon nano-tube and a process control agent, obtaining composite powder, finally enabling the composite powder to be composited with paper fibers, and preparing the composite paper by virtue of a vacuum suction filtering method. The technical scheme disclosed by the invention overcomes the technical defects in the prior art that theelectromagnetic shielding composite paper is relatively high in requirement on device conditions, limit in preparation efficiency, high in manufacturing cost, and low in paper conductivity and mechanical performance; the prepared composite paper has good flexibility, conductivity and mechanical performance, and is controllable in shape and resistance; and the paper fibers and carbon nano-tube in the composite paper can be perfectly combined to form a three-dimensional network with good conductivity, so that the electromagnetic shielding efficacy is good.

Description

technical field [0001] The invention relates to the field of material processing, in particular to an electromagnetic shielding composite paper and a preparation method thereof. Background technique [0002] With the rapid sweep of the third industrial revolution across the world, natural science has been comprehensively improved, and electronic and electrical technologies have continued to make breakthroughs. When electronic and electrical equipment serve human life, they also generate electromagnetic interference (EMI). With the rapid development of the modern electronic industry and the widespread use of electronic and electrical products, electromagnetic interference has become a new social hazard. On the one hand, electromagnetic radiation will affect people's health, and it will cause serious interference to the surrounding electronic equipment, which will cause their working procedures to be disordered and produce wrong actions; on the other hand, electromagnetic rad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/12D21H11/12D21H11/00D21H13/42D21H13/40D21H17/67D21H17/36D21H17/37D21H17/53D21H17/48D21H17/31D21H17/12D21H17/11D21H17/28D21H17/09D21H17/25D21H17/00D21H17/06D21H17/14D21H21/08D21H21/14D21H27/00H05K9/00
CPCD21H11/00D21H11/12D21H13/40D21H13/42D21H15/12D21H17/00D21H17/06D21H17/09D21H17/11D21H17/12D21H17/14D21H17/25D21H17/28D21H17/31D21H17/36D21H17/37D21H17/48D21H17/53D21H17/67D21H21/08D21H21/14D21H27/00H05K9/0083
Inventor 陈庆司文彬
Owner 何贞芳
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