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A kind of preparation method of light-weight broadband electromagnetic shielding material

An electromagnetic shielding material and broadband technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of unfavorable hull lightweight, high rigidity of metal film or wire, high density of metal itself, and achieve excellent broadband electromagnetic shielding performance , The preparation process is simple and feasible, and the effect of reducing the mass per unit area

Active Publication Date: 2020-07-24
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, marine electromagnetic shielding cables mostly use metal film or wire to shield electromagnetic waves, and the shielding effect is better, but the disadvantages are: the metal film or wire is rigid and cannot be bent, and it is difficult to lay; and the wire is in the process of weaving. Defects such as broken wires cannot be completely eliminated, making the burrs at the broken wires easy to pierce the cable insulation layer, resulting in electromagnetic leakage and potential safety hazards; in addition, due to the high density of the metal itself, the weight of the cable will eventually increase, which is not conducive to the lightweight of the hull requirements

Method used

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  • A kind of preparation method of light-weight broadband electromagnetic shielding material
  • A kind of preparation method of light-weight broadband electromagnetic shielding material
  • A kind of preparation method of light-weight broadband electromagnetic shielding material

Examples

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Embodiment 1

[0038] A lightweight broadband electromagnetic shielding material, the mass parts of each component are: 100 parts of EVM rubber, graphene-Fe 3 o 4 -BaTiO 3 2 parts of filler, 10 parts of N550 carbon black, 5 parts of light calcium carbonate, 15 parts of dioctyl sebacate (DOS), 2 parts of anti-aging agent RD, 2 parts of anti-aging agent 4010NA, 2 parts of polycarbodiimide, over Dicumyl oxide (DCP) 2 parts, triallyl isocyanurate (TAIC) 3 parts.

[0039] A method for lightweight broadband electromagnetic shielding material, comprising the following steps:

[0040] Step 1, get the FeCl of 4.6g graphene and 13g 3 •6H 2 O, add the two into 200mL of ethylene glycol and stir until a stable suspension is formed, then add 56g of sodium acetate to a homogeneous phase, then add 15g of polyethylene glycol to form a mixed solution A, and pour the mixed solution A into the high pressure reaction Kettle, react at 180°C for 10 hours, take out the reactant A after cooling, wash the reacta...

Embodiment 2

[0046] A lightweight broadband electromagnetic shielding material, the mass parts of each component are: 100 parts of EVM rubber, graphene-Fe 3 o 4 -BaTiO 3 5 parts of filler, 25 parts of N550 carbon black, 5 parts of light calcium carbonate, 15 parts of dioctyl sebacate (DOS), 5 parts of trioctyl trimellitate (TOTM), 2 parts of anti-aging agent RD, anti-aging agent 1 part of 4010NA, 2 parts of polycarbodiimide, 2 parts of dicumyl peroxide (DCP), 3 parts of triallyl isocyanurate (TAIC).

[0047] A method for lightweight broadband electromagnetic shielding material, comprising the following steps:

[0048] Step 1, get the FeCl of 4.6g graphene and 26g 3 •6H 2 O, add the two into 400mL of ethylene glycol and stir until a stable suspension is formed, then add 75g of sodium acetate to a homogeneous phase, then add 25g of polyethylene glycol to form a mixed solution A, and pour the mixed solution A into the high pressure reaction Kettle, react at 150°C for 9 hours, take out th...

Embodiment 3

[0054] A lightweight broadband electromagnetic shielding material, the mass parts of each component are: 100 parts of EVM rubber, graphene-Fe 3 o 4 -BaTiO 3 10 parts of filler, 15 parts of N330 carbon black, 5 parts of light calcium carbonate, 15 parts of dioctyl sebacate (DOS), 5 parts of trioctyl trimellitate (TOTM), 2 parts of anti-aging agent RD, anti-aging agent 1 part of 4010NA, 2 parts of polycarbodiimide, 2.5 parts of bis-pentasulfurizing agent, 3 parts of triallyl isocyanurate (TAIC).

[0055] A method for lightweight broadband electromagnetic shielding material, comprising the following steps:

[0056] Step 1, get the FeCl of 6.9g graphene and 51.8g 3 •6H 2 O, add the two into 500mL of ethylene glycol and stir until a stable suspension is formed, then add 150g of sodium acetate to a homogeneous phase, then add 35g of polyethylene glycol to form a mixed solution A, and pour the mixed solution A into the high pressure reaction Kettle, react at 200°C for 6 hours, t...

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Abstract

The invention discloses a lightweight and wideband electromagnetic shielding material and a preparation method thereof. Raw materials of the electromagnetic shielding material comprise 2-15% of a functional filler, 10-30% of a reinforcement filler and 17-47% of a processing assistant. Graphene is modified, the surface of the graphene is grafted with ferromagnetic particles containing iron and barium to prepare graphene-Fe3O4-BaTiO3 ternary nano-particles used as the electromagnetic shielding functional filler, and a special preparation technology is used to solve the problem of dispersion of the ternary nano-particles in an EVM rubber matrix in order to prepare the lightweight and wideband electromagnetic shielding material. The density is 1.20-1.23 g / cm<3>, so the mass per unit area of the lightweight and wideband electromagnetic shielding material is 50% or above lower than that of metal film or metal wire electromagnetic shielding material; and the electromagnetic shielding effectiveness of an electromagnetic shielding material sample with the thickness of 2 mm in a range of 30 MHz to 18 GHz can reach 31-45 dB, so the electromagnetic shielding material has excellent lightweight and wideband electromagnetic shielding effectiveness.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding materials, in particular to a preparation method of a lightweight broadband electromagnetic shielding material. Background technique [0002] Electromagnetic interference is the electromagnetic radiation signal generated by the electric field loop. Electromagnetic wave radiation has caused thorny problems such as electromagnetic pollution, electromagnetic interference, and leakage of secrets, hindering the stable development of the electronic information industry. An effective solution to this problem is to develop materials that can absorb electromagnetic waves in specific frequency bands. Therefore, electromagnetic shielding materials have broad application prospects in military and civil fields. [0003] At present, marine electromagnetic shielding cables mostly use metal film or wire to shield electromagnetic waves, and the shielding effect is better, but the disadvantages a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L31/04C08L79/00C08K13/06C08K9/02C08K7/00C08K3/04C08K3/26C08K5/11C08K5/3437C08K5/12H05K9/00
CPCC08K2003/265C08K2201/003C08K2201/011C08L31/04C08L2201/02C08L2201/08C08L2312/00H05K9/0081C08L79/00C08K13/06C08K9/02C08K7/00C08K3/04C08K3/26C08K5/11C08K5/3437C08K5/12
Inventor 张玲刘鹏征王雯霏程伟
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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