A kind of composite electromagnetic shielding material and preparation method thereof

A shielding material and composite electromagnetic technology, applied in the field of shielding materials, can solve the problems of limited improvement of electromagnetic shielding performance, limited shielding effect of filling materials, and unsatisfactory electromagnetic shielding effect, achieving good electromagnetic shielding effect and increasing high frequency electromagnetic shielding. Shielding effect, low density effect

Active Publication Date: 2021-06-25
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used electromagnetic shielding materials are blends of conductive fillers and resins, such as gold, silver, copper or graphite mixed with polymers to improve their electrical conductivity, thereby improving the electromagnetic shielding effect, but the polymer matrix has better electrical insulation The effect of improving the electromagnetic shielding performance is limited
In addition, some researchers have prepared electromagnetic shielding materials by blending soft magnetic materials and polymers, but the electromagnetic shielding effect of the composite materials is not ideal, and the increase in filling amount will lead to processing difficulties and affect the mechanical properties of materials.
There are also researchers who mixed the granular pore-forming agent with the biomass material and prepared a low-density, broadband porous composite structure shielding material through sintering treatment. However, the shielding effect of the filling material prepared by this method is limited, and the chemical corrosion resistance Weak, poor mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 5 g of conductive polyaniline and 2.5 g of graphene into 50 mL of butanol, and disperse with ultrasonic stirring for 10 min. Then, put the mixed solution into a vacuum oven at 75° C. to dry for more than 12 hours. The dried powder and 36g of polypropylene were put into the internal mixer together, and internally mixed for 3 hours, the temperature was set at 160° C., and the frequency was set at 30 Hz. The mixture after banburying was kneaded, the roller speed was 1.5m / min, and the temperature was set at 156°C. Then, the mixed material was calendered, the temperature of the roller was adjusted to 160° C., and the speed of the roller was 1 m / min, to obtain a polymer film.

[0027] Weigh 24g of sendust aluminum powder into 35g of xylene solvent, add 3g of phenolic-butyronitrile, mix to form a slurry, import the mixed slurry into the scraper groove, cast the film at a speed of 1m / min, and cast it Obtain alloy powder film.

[0028] The polypropylene film and the alloy...

Embodiment 2

[0030] Add 6 g of conductive polyaniline and 3.5 g of graphene into 50 mL of butanol, and disperse with ultrasonic stirring for 10 min. Then, put the mixed solution into a vacuum oven at 75° C. to dry for more than 12 hours. The dried powder and 36g of polypropylene were put into the internal mixer together, and internally mixed for 3 hours, the temperature was set at 162° C., and the frequency was set at 30 Hz. The mixture after banburying was kneaded, the roller speed was 1.5m / min, and the temperature was set at 156°C. Then, the mixed material was calendered, the temperature of the roller was adjusted to 160° C., and the speed of the roller was 1 m / min, to obtain a polymer film.

[0031] Weigh 24g of sendust aluminum powder into 35g of xylene solvent, add 3g of phenolic-butyronitrile, mix to form a slurry, import the mixed slurry into the scraper groove, cast the film at a speed of 1m / min, and cast it Obtain alloy powder film.

[0032] The polypropylene film and the alloy...

Embodiment 3

[0034] Add 3 g of conductive polyaniline and 3 g of graphene into 50 mL of butanol, and disperse with ultrasonic stirring for 10 min. Then, put the mixed solution into a vacuum oven at 75° C. to dry for more than 12 hours. The dried powder and 36g of polypropylene were put into the internal mixer together, and internally mixed for 3 hours, the temperature was set at 160° C., and the frequency was set at 30 Hz. The mixture after banburying was kneaded, the roller speed was 1m / min, and the temperature was set at 156°C. Then, the mixed material was calendered, the temperature of the roller was adjusted to 160° C., and the speed of the roller was 1.5 m / min to obtain a polymer film.

[0035] Weigh 24g of sendust aluminum powder into 35g of xylene solvent, add 3g of phenolic-butyronitrile, mix to form a slurry, import the mixed slurry into the scraper groove, cast the film at a speed of 1m / min, and cast it Obtain alloy powder film.

[0036] The polypropylene film and the alloy po...

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Abstract

The invention belongs to the technical field of shielding materials, and discloses a composite electromagnetic shielding material and a preparation method thereof. The composite electromagnetic shielding material of the present invention comprises a polymer, alloy powder, polyaniline, graphene, an organic solvent and an adhesive, wherein the polymer is one of polyethylene, polypropylene, polystyrene and polyamide kind. The composite electromagnetic shielding material of the present invention enhances the electromagnetic shielding performance by combining high conductivity materials and high eddy current effect materials, and the prepared composite electromagnetic shielding material has good electromagnetic shielding effect on broadband electromagnetic waves, and at the same time, the material is lightweight, And has good mechanical properties.

Description

technical field [0001] The invention relates to the technical field of shielding materials, in particular to a composite electromagnetic shielding material and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of electronic communication and industrial civilization, the popularization of electronic equipment and wireless communication systems has made electromagnetic interference more and more serious, which has a great impact on the normal operation of electronic equipment systems. In addition, more and more electronic and electrical equipment and the rapid change of communication systems bring people fast and convenient information dissemination, but also bring relatively serious electromagnetic pollution, and the electromagnetic waves generated are harmful to human work and living environment It is becoming more and more serious, seriously affecting the ecological environment required by human health and sustainab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/18B32B15/00B32B15/085B32B37/06B32B37/10C08L79/02C08K3/04C08J5/18B29C43/24
CPCB29C43/24B32B15/00B32B15/085B32B27/18B32B27/32B32B37/06B32B37/10B32B2307/212B32B2323/10C08J5/18C08J2379/02C08K3/042
Inventor 单震刘立东朱航飞
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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