Metal-loaded carbon/polymer-based electromagnetic shielding material and preparation method thereof

An electromagnetic shielding material and electromagnetic shielding technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of poor mechanical properties and electromagnetic shielding performance of carbon/polymer-based materials, achieve environmental friendliness, and improve electromagnetic shielding efficiency. Effect

Inactive Publication Date: 2020-08-18
江西伟普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon / polymer-based materials have poor mechanical properties and electromagnetic shielding properties

Method used

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  • Metal-loaded carbon/polymer-based electromagnetic shielding material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] A metal-supported carbon / polymer-based electromagnetic shielding material comprising: CoFe 2 o 4 Nano powder modified MoS 2 On, get MoS 2 @CoFe 2 o 4 Nano-powder, then loaded on the graphene microchip, then impregnated by polyurethane (PU), then melted and loaded on polylactide (PLA), and then filled with PBAT by vacuum infiltration to obtain an electromagnetic shielding composite material, the MoS 2 @CoFe 2 o 4 The nano powder content is 10wt%, the graphene microsheet content is 12wt%, the polyurethane content is 8wt%, the PBAT content is 10wt%, and the balance is polylactide.

[0025] Among them, the MoS 2 @CoFe 2 o 4 The molar ratio of Mo, Co and Fe in the nanopowder is 1:2:1.

[0026] A method for preparing an electromagnetic shielding composite material, comprising the following steps:

[0027] S1, CoFe 2 o 4 Preparation of nanoparticles: Mix iron acetylacetonate and cobalt acetylacetonate in ammonium oleate, and continuously magnetically stir at room ...

Embodiment 2

[0036] A metal-supported carbon / polymer-based electromagnetic shielding material comprising: CoFe 2 o 4 Nano powder modified MoS 2 On, get MoS 2 @CoFe 2 o 4 Nano-powder, then loaded on the graphene microchip, then impregnated by polyurethane (PU), then melted and loaded on polylactide (PLA), and then filled with PBAT by vacuum infiltration to obtain an electromagnetic shielding composite material, the MoS 2 @CoFe 2 o 4 The nano powder content is 10wt%, the graphene microsheet content is 15wt%, the polyurethane content is 5wt%, the PBAT content is 8wt%, and the balance is polylactide.

[0037] Among them, the MoS 2 @CoFe 2 o 4 The molar ratio of Mo, Co and Fe in the nanopowder is 1.5:2:1.2.

[0038] A method for preparing an electromagnetic shielding composite material, comprising the following steps:

[0039] S1, CoFe 2 o 4 Preparation of nanoparticles: Mix iron acetylacetonate and cobalt acetylacetonate in ammonium oleate, and continuously magnetically stir at ro...

Embodiment 3

[0049] A metal-supported carbon / polymer-based electromagnetic shielding material comprising: CoFe 2 o 4 Nano powder modified MoS 2 On, get MoS 2 @CoFe 2 o 4 Nano-powder, loaded on the graphene microchip, then impregnated by polyurethane (PU), melted and loaded on polylactide (PLA), and then filled with PBAT by vacuum infiltration to obtain electromagnetic shielding composite material, the CoFe 2 o 4 The nano powder content is 8wt%, the graphene microsheet content is 14wt%, the polyurethane content is 6wt%, the PBAT content is 9wt%, and the balance is polylactide.

[0050] Among them, the MoS 2 @CoFe 2 o 4 The molar ratio of Mo, Co and Fe in the nanopowder is 1.5:2:1.

[0051] A method for preparing an electromagnetic shielding composite material, comprising the following steps:

[0052] S1, CoFe 2 o 4 Preparation of nanoparticles: Mix iron acetylacetonate and cobalt acetylacetonate in ammonium oleate, and continuously magnetically stir at room temperature for 1 h t...

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Abstract

The invention provides a metal-loaded carbon/polymer-based electromagnetic shielding material and a preparation method thereof. The invention belongs to the field of electromagnetic shielding materialpreparation. The method specifically comprises the following steps: 1) modifying MoS2 with CoFe2O4 nano powder to obtain MoS2@CoFe2O4 nanopowder; loading the MoS2@CoFe2O4 nanopowder on the graphene nanoplatelets, carrying out polyurethane impregnation, then melting and loading the graphene nanoplatelets on polylactide; 2) filling PBAT through vacuum infiltration to obtain an electromagnetic shielding composite material; wherein the content of the MoS2@CoFe2O4 nanopowder is 8-10 wt%, the content of the graphene nanoplatelets is 12-15 wt%, the content of the polyurethane is 5-8 wt%, the contentof the PBAT is 8-10 wt%, and the balance is the polylactide; the molar ratio of Mo, Co and Fe in the MoS2@CoFe2O4 nanopowder is (1-1.5):2:1:1.2. According to the invention, the metal is loaded on thematerial, so that the lattice defects of the carbon/polymer-based electromagnetic shielding material can be filled, the electromagnetic shielding efficiency of the electromagnetic shielding materialis improved, and the mechanical properties of the material are improved through PU impregnation and PBAT permeation.

Description

technical field [0001] The invention relates to the field of electromagnetic shielding materials, in particular to a metal-loaded carbon / polymer-based electromagnetic shielding material and a preparation method thereof. Background technique [0002] Electromagnetic radiation (EMR) is a by-product of the extensive use of electronic equipment. It not only interferes with the normal operation of electrical appliances, but may also have adverse effects on human health. Therefore, appropriate measures need to be taken to "cut off" the radiation coupling path. At present, the most effective "cutting" measure is to use electromagnetic shielding materials to reduce the intensity of electromagnetic radiation to a certain safe range. In recent years, due to the advantages of polymer materials such as light weight, low cost, easy processing and corrosion resistance, a lot of research has focused on the development of high-performance polymer-based electromagnetic shielding materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L75/04C08K9/12C08K3/04C08K3/30C08K3/24H05K9/00
CPCC08L67/04H05K9/0083C08L2201/06C08L2205/03C08L2205/02C08K2201/011C08K2003/3009
Inventor 段晓峰邵萌
Owner 江西伟普科技有限公司
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