Salt-spray corrosion resistant electromagnetic shielding composite material and preparation method thereof

A composite material and electromagnetic shielding technology, applied in the field of composite materials, can solve the problems of high price, high rubber price, complicated preparation method, etc., and achieve the effects of excellent salt spray corrosion resistance, stable physical and mechanical properties, and excellent comprehensive performance.

Active Publication Date: 2017-11-07
QINGDAO UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN201310627828.5 discloses a kind of electromagnetic shielding composite material prepared on the basis of silicone rubber elastomer, but the material uses silver-plated nickel powder and silver-plated copper powder to enhance the magnetic permeability and electrical conductivity of the material, due to the use of silver, Precious metal materials such as nickel and copper are expensive on the one hand and susceptible to salt spray corrosion on the other
Patent CN201610318779.0 discloses an electromagnetic shielding material prepared by adding fluorosilane-modified halloysite nanotubes, modified carbon nanotubes and fumed silica. The preparation method of this material is relatively cumbersome
And the price of the rubber used in the patent is very expensive, which is not conducive to the control of production costs

Method used

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  • Salt-spray corrosion resistant electromagnetic shielding composite material and preparation method thereof
  • Salt-spray corrosion resistant electromagnetic shielding composite material and preparation method thereof
  • Salt-spray corrosion resistant electromagnetic shielding composite material and preparation method thereof

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Effect test

Embodiment 1

[0023] An electromagnetic shielding composite material resistant to salt spray corrosion, the main components of the composite material are by weight:

[0024]

[0025]

[0026] Concrete preparation steps are as follows:

[0027] 1) Pretreatment of expanded graphite: microwave the formulated amount of expandable graphite in a microwave oven for 15S to obtain expanded graphite, and then add the expanded graphite to the mixture of ethanol and distilled water, where the volume ratio of ethanol and distilled water is 1: 1. Ultrasonic treatment with 400W power for 6 hours, suction filtration of the mixed solution, vacuum drying of the resulting filter cake for 12 hours, and grinding the dried expanded graphite with a ball mill for 6 hours to obtain expanded graphite powder with a particle size of 100 mesh.

[0028] 2) Chopped carbon fiber treatment: prepare a hydroxypropyl methylcellulose dispersant with a mass fraction of 0.15% with water, and then add it to the beater accor...

Embodiment 2

[0032] An electromagnetic shielding composite material resistant to salt spray corrosion, the composite material, in parts by weight, has the following main components:

[0033]

[0034]

[0035] Among them, chopped carbon fibers with a diameter of 3um and a length of 5mm were selected from Shanghai Lishuo Composite Material Technology Co., Ltd.

[0036] The processing method of embodiment 2 is the same as the processing method of embodiment 1.

Embodiment 3

[0038] An electromagnetic shielding composite material resistant to salt spray corrosion, the composite material, in parts by weight, has the following main components:

[0039]

[0040] Among them, chopped carbon fibers with a diameter of 4 um and a length of 6 mm were selected from Shanghai Lishuo Composite Material Technology Co., Ltd.

[0041] The processing method of embodiment 3 is the same as the processing method of embodiment 1.

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Abstract

The invention relates to the field of composite materials, and provides a salt-spray corrosion resistant electromagnetic shielding composite material and a preparation method of the salt-spray corrosion resistant electromagnetic shielding composite material. The electromagnetic shielding composite material mainly comprises raw rubber, conductive carbon black, expanded graphite and chopped carbon fibers, and the salt-spray corrosion resistant electromagnetic shielding composite material is finally subjected to vulcanization molding by using the mixing way of a double-roller open mill. The salt-spray corrosion resistant electromagnetic shielding composite material has high electromagnetic shielding effectiveness and salt-spray corrosion resistance, and excellent comprehensive performances, is very suitable for being applied as a shielding material in the field of marine environments with higher requirements on the salt-spray corrosion resistance and shielding performances, and further has good market prospects.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a salt spray corrosion-resistant electromagnetic shielding composite material and a preparation method thereof. Background technique [0002] With the development of information and the advancement of science and technology, electronic products have been widely used, and the space electromagnetic environment has become increasingly complex. The problem of electromagnetic interference has attracted everyone's great attention, mainly in the following points: 1. It affects the normal operation of electronic equipment; 2. The problem of electromagnetic information leakage; 3. The problem of electromagnetic environmental pollution. Among them, the problem of electromagnetic information leakage may affect the development of my country's national defense construction. For example, the importance of electromagnetic information of nuclear submarines used in the marine environment is sel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L23/16C08L9/02C08L7/00C08K13/06C08K7/06C08K7/24C08K3/04C08K3/22
CPCC08K3/04C08K3/22C08K7/06C08K7/24C08K13/06C08K2003/2296C08K2201/001C08K2201/003C08K2201/004C08L7/00C08L9/00C08L9/02C08L23/16C08L2201/08C08L2205/03C08L2205/035
Inventor 刘莉游海军张保岗孙立水刘光烨
Owner QINGDAO UNIV OF SCI & TECH
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