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Electromagnetic shielding composite material and preparation method thereof

A composite material and electromagnetic shielding technology, applied in shielding materials, magnetic field/electric field shielding, electrical components, etc., can solve problems such as difficult to meet complex molding, low tensile strength, poor shielding effect, etc., and achieve high electromagnetic shielding effect, Good reproducibility and stable production application effect

Active Publication Date: 2020-07-28
诺思贝瑞新材料科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the deficiencies in the prior art, such as poor shielding effect of electromagnetic shielding materials, low tensile strength, and difficulty in satisfying complex molding, etc., thereby providing a stable production and convenient product molding, and at the same time Electromagnetic shielding composite materials with high shielding effectiveness and mechanical strength, meeting the requirements of various molding methods such as injection molding, extrusion, and 3D printing for electromagnetic shielding materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1 An electromagnetic shielding composite material and its preparation method

[0059] An electromagnetic shielding composite material, its composition ratio by weight is as follows:

[0060] 100 parts of PETG resin, 18 parts of metal-coated carbon fiber, 10 parts of FeSiAl alloy powder, 8 parts of silver-coated carbon nanotubes, 5 parts of toughening agent maleic anhydride grafted ethylene-octene copolymer, and 0.5 parts of coupling agent KH-560 part, 0.5 part of the compounded antioxidant, and 0.2 part of the lubricant N,N'-ethylene bisstearamide.

[0061] Wherein, the compounded antioxidant is a mixture of 40% by weight of antioxidant 1010, 30% by weight of antioxidant 168 and 30% by weight of antioxidant 1024.

[0062] The preparation method is as follows:

[0063] (1) Pre-dry the PETG resin to a moisture content of no more than 0.05% before use;

[0064] (2) Take silver-plated carbon nanotubes of required weight, composite antioxidant and 20 parts of P...

Embodiment 2

[0074] Embodiment 2 An electromagnetic shielding composite material and its preparation method

[0075] An electromagnetic shielding composite material, its composition ratio by weight is as follows:

[0076] 100 parts of PA12 resin, 15 parts of metal-coated carbon fiber, 12 parts of FeSiAl alloy powder, 8 parts of silver-coated carbon nanotubes, 3 parts of toughening agent maleic anhydride grafted ethylene-octene copolymer, and 0.3 parts of coupling agent KR-TTS part, 1 part of compound antioxidant, 0.2 part of lubricant magnesium stearate.

[0077] Wherein, the compounded antioxidant is a mixture of 60% by weight of antioxidant 330, 20% by weight of antioxidant P-EPQ and 20% by weight of antioxidant 697.

[0078] The preparation method is as follows:

[0079] (1) Pre-dry the resin until the moisture content does not exceed 0.05% before use;

[0080] (2) take silver-plated carbon nanotubes of required weight, antioxidant and 30 parts of PA12 resins, mix 10 minutes at 100r / ...

Embodiment 3

[0089] Embodiment 3 An electromagnetic shielding composite material and its preparation method

[0090] The difference with the electromagnetic shielding composite material described in embodiment 1 is the difference of the following components (undescribed components are the same as embodiment 1):

[0091] 20 parts of metal-plated carbon fiber, 6 parts of silver-plated carbon nanotube, 4 parts of toughening agent, 0.6 part of coupling agent KH-560, 0.8 part of compounded antioxidant, and 0.3 part of lubricant pentaerythritol stearate.

[0092] The electromagnetic shielding composite material described in reference example 1 was prepared in a similar manner (steps and processes not described are the same as in example 1).

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Abstract

The invention relates to an electromagnetic shielding composite material and a preparation method thereof. The electromagnetic shielding composite material comprises the following components in partsby weight: 100 parts of matrix resin, 15-20 parts of metallized carbon fibers, 10-12 parts of FeSiAl alloy powder, 6-8 parts of silver-plated carbon nanotubes, 3-5 parts of a toughening agent, 0.3-0.6part of a coupling agent, 0.5-1 part of a compounded antioxidant and 0.2-0.3 part of a lubricant. The electromagnetic shielding composite material provided by the invention is high in electromagneticshielding effect, and the high strength of a composite material molded part can be maintained. According to the preparation method provided by the invention, the combination of the metallized carbonfiber and the FeSiAl alloy powder with the matrix resin can be increased, the catalytic aging of various metal components in a material system to a plastic matrix is weakened, the excessive crushing of the carbon fiber in the mixing process of an extruder can be effectively avoided; meanwhile, the good mixing of all the components is ensured.

Description

technical field [0001] The application belongs to the technical field of composite materials, and in particular relates to an electromagnetic shielding composite material and a preparation method thereof. Background technique [0002] With the development of modern technology and the electronic industry, more and more electronic products have entered our lives, bringing great convenience to our lives, but also bringing an invisible and inaudible pollution—electromagnetic pollution. The electromagnetic interference generated by electromagnetic radiation not only easily affects the performance of electronic products, but also affects communication and causes equipment failures, etc.; electromagnetic pollution generated by electromagnetic radiation can also cause diseases in humans and other organisms. Many communication devices in the national defense field have been protected against electromagnetic waves, and some important monitoring equipment and research laboratories also...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L51/06C08K13/06C08K9/06C08K9/02C08K7/06C08K3/08C08K3/04C08K5/134C08K5/526C08J3/22H05K9/00
CPCC08L67/02C08J3/226H05K9/009H05K9/0083C08L2201/08C08J2367/02C08J2467/02C08L51/06C08K13/06C08K9/06C08K9/02C08K7/06C08K3/08C08K3/041C08K5/1345C08K5/526
Inventor 李振曹勇民胡祥章梁雪娇王雁国茅伟华
Owner 诺思贝瑞新材料科技(苏州)有限公司
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