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Rubber-based composite material for preventing electromagnetic interference and preparation method thereof

An anti-electromagnetic interference, composite material technology, applied in the field of rubber materials, can solve the problems of reduced mechanical properties, rubber mechanical properties, affecting the use of rubber, etc., to achieve the effects of improving compatibility, reducing surface energy, and preventing agglomeration

Pending Publication Date: 2021-09-24
成都布雷蒙材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Further, the raw materials of the modified carbonyl iron powder include: 10-20 parts of carbonyl iron powder, 1-3 parts of vinyltriethoxysilane, 30-parts widely used in various industries, especially The miniaturization and high integration of electronic components and the lightweight, high-speed and digitalization of electronic instruments and meters; electromagnetic signals, due to their susceptibility to external electromagnetic interference, will cause malfunctions and cause serious consequences. Therefore, various effective protective measures must be taken. In order to protect it from interference and paralysis, at present, the internal pads of existing electronic instruments are equipped with rubber for electromagnetic shielding to protect the components in electronic instruments. However, a large amount of electromagnetic shielding will be added inside the existing anti-electromagnetic interference rubber Fillers, which will lead to a decline in the mechanical properties of the rubber, and the mechanical properties will be reduced, which will affect the use of the rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The rubber-based composite material for preventing electromagnetic interference in this embodiment includes the following preparation steps:

[0044] (1) In parts by weight, weigh 10 parts of carbonyl iron powder, 1 part of vinyltriethoxysilane, and 30 parts of absolute ethanol;

[0045] (2) Add vinyltriethoxysilane and carbonyl iron powder into absolute ethanol, put it in an ultrasonic disperser, treat it ultrasonically at room temperature with a power of 400W for 20min, filter it, and dry it in vacuum to obtain a particle with an average particle size of 60nm. Modified carbonyl iron powder;

[0046](3) In parts by weight, weigh 40 parts of graphite whiskers, 200 parts of 10% hydrogen peroxide, 12 parts of thionyl chloride, 0.4 parts of triethylamine, and 0.6 parts of dibutyltin dilaurate , 20 parts of polyethylene glycol with a molecular weight of 400, 400 parts of toluene;

[0047] (4) Add graphite whiskers to hydrogen peroxide, stir at 200r / min for 30min in a wate...

Embodiment 2

[0056] The rubber-based composite material for preventing electromagnetic interference in this embodiment includes the following preparation steps:

[0057] (1) In parts by weight, weigh 15 parts of carbonyl iron powder, 2 parts of vinyltriethoxysilane, and 45 parts of absolute ethanol;

[0058] (2) Add vinyltriethoxysilane and carbonyl iron powder into absolute ethanol, put it in an ultrasonic disperser, treat it ultrasonically at room temperature with a power of 500W for 30min, filter it, and dry it in vacuum to obtain a particle with an average particle size of 70nm. Modified carbonyl iron powder;

[0059] (3) In parts by weight, weigh 50 parts of graphite whiskers, 250 parts of hydrogen peroxide with a mass fraction of 10%, 15 parts of thionyl chloride, 0.6 parts of triethylamine, and 0.9 parts of dibutyltin dilaurate , 30 parts of polyethylene glycol with a molecular weight of 500, 500 parts of toluene;

[0060] (4) Add graphite whiskers to hydrogen peroxide, stir at 25...

Embodiment 3

[0069] The rubber-based composite material for preventing electromagnetic interference in this embodiment includes the following preparation steps:

[0070] (1) In parts by weight, weigh 20 parts of carbonyl iron powder, 3 parts of vinyltriethoxysilane, and 60 parts of absolute ethanol;

[0071] (2) Add vinyltriethoxysilane and carbonyl iron powder into absolute ethanol, put it in an ultrasonic disperser, treat it ultrasonically with a power of 600W for 40min at room temperature, filter, and dry in vacuum to obtain a particle with an average particle size of 80nm. Modified carbonyl iron powder;

[0072] (3) In parts by weight, weigh 60 parts of graphite whiskers, 300 parts of hydrogen peroxide with a mass fraction of 10%, 18 parts of thionyl chloride, 0.8 parts of triethylamine, and 1.2 parts of dibutyltin dilaurate , 40 parts of polyethylene glycol with a molecular weight of 600, 600 parts of toluene;

[0073] (4) Add graphite whiskers to hydrogen peroxide, stir at 300r / min...

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PUM

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Abstract

The invention discloses a rubber-based composite material for preventing electromagnetic interference. The rubber-based composite material is prepared from 100-120 parts of silicone rubber, 20-40 parts of polyaniline, 15-30 parts of modified carbonyl iron powder, 5-10 parts of modified graphite whiskers, 2-8 parts of sodium stearate and 0.6-0.8 part of ammonium persulfate. The invention also discloses a preparation method of the rubber-based composite material for preventing electromagnetic interference. The preparation method comprises the steps of (1) placing the silicone rubber in a double-roller open mill to uniformly wrap rollers, then adding ammonium persulfate, polyaniline, the modified carbonyl iron powder, the modified graphite whiskers and sodium stearate, and mixing to obtain a rubber material; (2) placing the rubber material at room temperature and then placing the rubber material in a mixing mill for remixing to obtain a remixed rubber material; (3) vulcanizing the remixed rubber material in a vulcanizing machine to obtain a section of vulcanized silicone rubber; and (4) putting the section of vulcanized silicone rubber into a drying box, standing under a high-temperature condition, vulcanizing in the vulcanizing machine, and cooling at normal temperature to obtain the rubber-based composite material for preventing electromagnetic interference.

Description

technical field [0001] The invention relates to a rubber-based composite material for preventing electromagnetic interference and a preparation method thereof, belonging to the technical field of rubber materials. Background technique [0002] With the rapid development of information technology, various electrical equipment as the carrier of information technology has become [0003] In order to solve the above technical problems, the technical scheme adopted in the present invention: [0004] A rubber-based composite material for preventing electromagnetic interference, comprising the following raw materials in parts by weight: 100-120 parts of silicone rubber, 20-40 parts of polyaniline, 15-30 parts of modified carbonyl iron powder, 5-10 parts of modified Graphite whiskers, 2-8 parts of sodium stearate, 0.6-0.8 parts of ammonium persulfate. [0005] Further, the raw materials of the modified carbonyl iron powder include: 10-20 parts of carbonyl iron powder, 1-3 parts of...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L79/02C08K3/18C08K7/06C08K9/06C08K9/10C08K9/02C08K9/04
CPCC08L83/04C08L79/02C08K3/18C08K7/06C08K9/06C08K9/10C08K9/02C08K9/04C08K9/08
Inventor 雷洪冬
Owner 成都布雷蒙材料科技有限公司