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Preparation method for high-conductivity electromagnetic shielding rubber with electrochemical corrosion resistance

An electromagnetic shielding and high conductivity technology, which is applied in the field of conductive rubber, can solve the problems of reducing the shielding efficiency of conductive rubber, high price, and reduced electromagnetic shielding function, and achieves excellent conductivity and electrochemical corrosion resistance, simple operation process, and reduced production. cost effect

Inactive Publication Date: 2017-10-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silver-plated aluminum powder conductive rubber still has the following defects: it is expensive; it is easy to absorb moisture and expand in a humid environment, resulting in poor contact of the conductive powder, which will reduce the shielding effectiveness of the conductive rubber; obvious chemical damage will occur in the salt spray environment. Corrosion, resulting in a decrease in conductivity and a decrease in electromagnetic shielding function

Method used

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  • Preparation method for high-conductivity electromagnetic shielding rubber with electrochemical corrosion resistance
  • Preparation method for high-conductivity electromagnetic shielding rubber with electrochemical corrosion resistance
  • Preparation method for high-conductivity electromagnetic shielding rubber with electrochemical corrosion resistance

Examples

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Effect test

Embodiment 1

[0023] 100 parts of methyl silicone rubber;

[0024] Nickel-coated aluminum powder (particle size 10um, nickel content 10%) 100 parts;

[0025] White carbon black (particle diameter 5nm) 5 parts;

[0026] Dicumyl peroxide (DCP) 0.1 part;

[0027] 0.1 copy of TAIC;

[0028] The preparation method of conductive rubber of the present invention comprises the following steps:

[0029] 1) Evenly disperse the silane coupling agent A-137 in the ethanol solution according to 10% of the amount of conductive powder;

[0030] 2) Add nickel-coated aluminum powder into the coupling agent solution according to the parts by weight, and obtain a coupling agent-coated conductive powder after volatilization and drying;

[0031] 3) Add silicone rubber to the rubber mill or internal mixer, then add vulcanizing agent, white carbon black, conductive powder coated with coupling agent, and vulcanizing agent to make nickel-coated aluminum powder / silicone rubber compound , Nickel-clad aluminum powd...

Embodiment 2

[0039] 100 parts of methyl vinyl silicone rubber;

[0040] Nickel-coated aluminum powder (particle size 50um, nickel content 40%) 300 parts;

[0041] White carbon black (particle diameter 30nm) 10 parts;

[0042] 3 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (DBPMH);

[0043] 2 copies of TAIC;

[0044] The preparation method of conductive rubber of the present invention comprises the following steps:

[0045] 1) Evenly disperse the silane coupling agent A-151 in the ethanol solution according to 5% of the amount of conductive powder;

[0046] 2) Add nickel-coated aluminum powder into the coupling agent solution according to the parts by weight, and obtain a coupling agent-coated conductive powder after volatilization and drying;

[0047] 3) Add silicone rubber to the rubber mill or internal mixer, then add vulcanizing agent, white carbon black, conductive powder coated with coupling agent, and vulcanizing agent to make nickel-coated aluminum powder / silicone rubbe...

Embodiment 3

[0055] 100 parts of fluorosilicone rubber;

[0056] Nickel-coated aluminum powder (particle size 100um, nickel content 60%) 450 parts;

[0057] White carbon black (particle diameter 60nm) 15 parts;

[0058] 1.5 parts of 1,3-bis(tert-butylperoxyisopropyl)benzene (BIPB);

[0059] 2 copies of TATC;

[0060] The preparation method of conductive rubber of the present invention comprises the following steps:

[0061] 1) Evenly disperse the silane coupling agent A-174 in the ethanol solution according to 7% of the amount of conductive powder;

[0062] 2) Add nickel-coated aluminum powder into the coupling agent solution according to the parts by weight, and obtain a coupling agent-coated conductive powder after volatilization and drying;

[0063] 3) Add silicone rubber to the rubber mill or internal mixer, then add vulcanizing agent, white carbon black, conductive powder coated with coupling agent, and vulcanizing agent to make nickel-coated aluminum powder / silicone rubber compound...

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Abstract

The invention relates to a preparation method for high-conductivity electromagnetic shielding rubber with electrochemical corrosion resistance and belongs to the technical field of a conductive composite. In a nickel-coated aluminum powder / silicon rubber composite prepared according to the invention, the nickel-coated aluminum powder has the advantages of high electrical conductivity, low cost and excellent oxidation resistance. The rubber composite prepared according to the method has high electrical conductivity and high conductivity stability and has higher electromagnetic shielding effect and better electrochemical corrosion resistance. The preparation method is simple and feasible, is low in cost, is easy for industrialization, is suitable for the electromagnetic shielding protection in damp corrosion environments, such as, ships and unmanned stations in jungles, and has better national defense and safety significance and economic benefits.

Description

technical field [0001] The invention relates to a conductive rubber used for sealing and electromagnetic shielding, in particular to a conductive rubber with electrochemical corrosion resistance and a preparation method of the conductive rubber. Background technique [0002] The rapid development of the electronics and communication industries brings rapid information exchange, but also produces hazards such as electromagnetic wave information leakage, electromagnetic wave interference, and electromagnetic environmental pollution. Highly conductive rubber composite materials can not only effectively realize electromagnetic sealing in a wide frequency range, but also have the advantages of good elasticity, low density, low cost and easy processing. In recent years, high-conductivity rubber composite materials have developed rapidly and are widely used in various electronic and electrical equipment in military, national defense, and aerospace to play the role of electromagneti...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/07C08L83/08C08K13/06C08K9/06C08K9/02C08K3/08C08K3/36C08K5/14
CPCC08K3/08C08K3/36C08K5/14C08K9/02C08K9/06C08K13/06C08K2003/0812C08K2003/0862C08K2201/001C08K2201/003C08K2201/011C08L83/04C08L83/08
Inventor 邹华许亭廖坤张继阳李红霞田明冯予星张立群
Owner BEIJING UNIV OF CHEM TECH
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