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Electromagnetic shielding rubber

An electromagnetic shielding and rubber technology, applied in the field of electromagnetic shielding, can solve the problems of high cost of carbon nanotube preparation, easy migration, and lower percolation threshold

Inactive Publication Date: 2017-03-08
WUXI MINGSHENG STRONG BLOWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These fillers have their own defects in the application of conductive rubber: metal fillers mainly include silver and copper materials, metal silver has strong oxidation resistance and excellent shielding effect, but silver particles are prone to migration in the rubber matrix
Carbon nanotubes have a large aspect ratio, so the percolation threshold is significantly reduced compared to carbon black, but the dispersion of carbon nanotubes is still not well resolved, and the preparation cost of carbon nanotubes is very high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An electromagnetic shielding rubber is a graphene / carbon nanotube / silicon rubber composite material. In the composite material, the weight ratio of graphene / carbon nanotube / silicon rubber is 1:2:100.

[0024] The preparation method of the graphene / carbon nanotube / silicone rubber composite material includes:

[0025] (1) Disperse the silicone rubber in tetrahydrofuran to form a uniform solution;

[0026] (2) Disperse the carbon nanotubes in tetrahydrofuran, and ultrasonically treat them for 2 hours with an ultrasonic power of 130w;

[0027] (3) Add graphene to the tetrahydrofuran suspension of carbon nanotubes, and continue ultrasonic treatment for 0.5 hours with an ultrasonic power of 130w to obtain a mixed solution;

[0028] (4) Mix the obtained mixed solution with the uniformly dispersed silicone rubber solution, and ultrasonicate for 20 minutes under stirring, with an ultrasonic power of 80w;

[0029] (5) Under stirring conditions, evaporate tetrahydrofuran at 40°C and vacuum d...

Embodiment 2

[0033] An electromagnetic shielding rubber is a graphene / carbon nanotube / silicone rubber composite material. In the composite material, the weight ratio of graphene / carbon nanotube / silicone rubber is 1:2.5:100.

[0034] The preparation method of the graphene / carbon nanotube / silicone rubber composite material of the present invention includes:

[0035] (1) Disperse the silicone rubber in tetrahydrofuran to form a uniform solution;

[0036] (2) Disperse the carbon nanotubes in tetrahydrofuran and ultrasonically treat them for 5 hours with an ultrasonic power of 200w;

[0037] (3) Add graphene to the tetrahydrofuran suspension of carbon nanotubes, and continue ultrasonic treatment for 3 hours with an ultrasonic power of 200w to obtain a mixed solution;

[0038] (4) Mix the obtained mixture with a uniformly dispersed silicone rubber solution, and ultrasonicate for 50 minutes under stirring, with an ultrasonic power of 100w;

[0039] (5) Under stirring conditions, evaporate tetrahydrofuran at...

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Abstract

The invention discloses an electromagnetic shielding rubber. The electromagnetic shielding rubber is a composite material of graphene, carbon nanotube and silicone rubber, wherein the weight ratio of the graphene to the carbon nanotube to the silicone rubber is (0.5-2): (2-3): 100. The electromagnetic shielding rubber provided by the invention can significantly reduce the volume resistivity of the silicone rubber under the synergistic action of the graphene and the carbon nanotube, so the silicone rubber can obtain good conductivity under a low filling amount.

Description

Technical field [0001] The invention relates to the technical field of electromagnetic shielding, in particular to an electromagnetic shielding rubber. Background technique [0002] With the more and more widespread application of various electronic equipment, electromagnetic interference, electromagnetic information leakage, environmental electromagnetic pollution and other problems have become more and more prominent. Electromagnetic interference can easily affect the normal operation of electronic information systems and high-sensitivity equipment, and electromagnetic leakage It will also threaten the security of electronic information and even endanger human health. Electromagnetic shielding means can effectively control electromagnetic radiation and reduce electromagnetic pollution. Traditional shielding materials are metal plates, metal wire meshes, etc. However, with the development of polymer materials and industrial production, aerospace, electronic and electrical field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K7/24C08K3/04
CPCC08K7/24C08K3/04C08K2201/001C08K2201/011C08L83/04
Inventor 张达明
Owner WUXI MINGSHENG STRONG BLOWER
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