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Electromagnetic shielding cobaltous sulfide material and preparation method thereof

A technology of electromagnetic shielding and cobalt sulfide, which is applied in the fields of magnetic field/electric field shielding, electrical components, etc., can solve the problems of affecting communication quality, susceptibility to cancer lesions, etc., and achieve the effect of improving shielding performance

Inactive Publication Date: 2017-05-31
NANJING JOOZ INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3C products such as notebook computers, GPS, ADSL and mobile phones will generate noise due to high-frequency electromagnetic wave interference, which will affect the communication quality
In addition, if the human body is exposed to strong electromagnetic fields for a long time, it may be susceptible to cancer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The electromagnetic shielding cobalt sulfide material comprises the following raw materials in parts by weight: 70 parts of cobalt sulfide, 22 parts of cobalt oxide, 22 parts of calcium oxide, 40 parts of sodium dodecylsulfonate, 25 parts of benzyltriphenylphosphine chloride, 20 parts of barium sulfate, 40 parts of dibutyl phthalate, 25 parts of polyurethane resin, 7.5 parts of vinyl bis stearamide, 20 parts of dimolybdenum boride, 30 parts of citric acid, 12.5 parts of glucose and 250 parts of water.

[0024] The particle size of cobalt oxide is 60 microns.

[0025] The preparation method of electromagnetic shielding cobalt sulfide material comprises the following steps:

[0026] Add citric acid and glucose to water, stir on a magnetic stirrer, and keep stirring after forming a solution;

[0027] Add cobalt sulfide, cobalt oxide, calcium oxide, sodium lauryl sulfonate, benzyltriphenylphosphine chloride, barium sulfate, dibutyl phthalate, polyurethane resin, vinylbisst...

Embodiment 2

[0032] The electromagnetic shielding cobalt sulfide material comprises the following raw materials in parts by weight: 50 parts of cobalt sulfide, 20 parts of cobalt oxide, 20 parts of calcium oxide, 30 parts of sodium dodecylsulfonate, 20 parts of benzyltriphenylphosphine chloride, 10 parts of barium sulfate, 20 parts of dibutyl phthalate, 10 parts of polyurethane resin, 7 parts of vinyl bis stearamide, 10 parts of dimolybdenum boride, 20 parts of citric acid, 10 parts of glucose and 200 parts of water.

[0033] The particle size of cobalt oxide is 40 microns.

[0034] The preparation method of electromagnetic shielding cobalt sulfide material comprises the following steps:

[0035] Add citric acid and glucose to water, stir on a magnetic stirrer, and keep stirring after forming a solution;

[0036] Add cobalt sulfide, cobalt oxide, calcium oxide, sodium lauryl sulfonate, benzyltriphenylphosphine chloride, barium sulfate, dibutyl phthalate, polyurethane resin, vinylbissteara...

Embodiment 3

[0041] The electromagnetic shielding cobalt sulfide material comprises the following raw materials in parts by weight: 90 parts of cobalt sulfide, 25 parts of cobalt oxide, 25 parts of calcium oxide, 50 parts of sodium dodecylsulfonate, 30 parts of benzyltriphenylphosphine chloride, 30 parts of barium sulfate, 60 parts of dibutyl phthalate, 40 parts of polyurethane resin, 8 parts of vinyl bis stearamide, 30 parts of dimolybdenum boride, 40 parts of citric acid, 15 parts of glucose and 300 parts of water.

[0042] The particle size of cobalt oxide is 80 microns.

[0043] The preparation method of electromagnetic shielding cobalt sulfide material comprises the following steps:

[0044] Add citric acid and glucose to water, stir on a magnetic stirrer, and keep stirring after forming a solution;

[0045] Add cobalt sulfide, cobalt oxide, calcium oxide, sodium lauryl sulfonate, benzyltriphenylphosphine chloride, barium sulfate, dibutyl phthalate, polyurethane resin, vinylbissteara...

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Abstract

The invention discloses an electromagnetic shielding cobaltous sulfide material and a preparation method thereof and belongs to the field of composite materials. The method includes the following steps that citric acid and glucose are added into water, the mixture is stirred in a magnetic stirrer, and stirring continues after the solution is formed; sulfide cobalt, cobalt oxide, calcium oxide, sodium dodecyl sulfate, benzyl triphenyl phosphorus chloride, barium sulfate, dibutyl phthalate, polyurethane resin, vinyl distearamide and dimolybdenum boride are added, stirring is performed for 60-120 minutes, then standing and filtering are performed to obtain a filter substance; the filter substance is taken out and put in a muffle furnace and is heated to reach 300-400 DEG C, reaction is performed for 1-1.3 hours, and cooling is performed; smashing, grinding and screening are performed to obtain the cobaltous sulfide material. The cobaltous sulfide material can be used for electromagnetic radiation shielding due to the fact that the shielding performance of the material subjected to citric acid soaking treatment can be improved. The polyurethane resin modified by adopting the method can also improve the shielding performance of the material.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to an electromagnetic shielding cobalt sulfide material and a preparation method thereof. Background technique [0002] Electromagnetic shielding is a measure used to reduce the field strength caused by certain sources in a certain area of ​​space. In most cases, shields can be made of metals such as copper, aluminum, steel, etc., but for constant and extremely low frequency magnetic fields, materials such as ferrite can also be used as shields. Because the shield absorbs energy (eddy current loss), reflects energy (interface reflection of electromagnetic waves on the shield) and counteracts energy (electrical Magnetic induction generates a reverse electromagnetic field on the shielding layer, which can offset part of the effect of interfering electromagnetic waves), so the shielding body has the function of reducing interference. 3C products such as notebook computers, GPS, ADS...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K13/02C08K3/30C08K3/22C08K5/42C08K5/50C08K5/12C08K5/20C08K3/38C08K5/09C08K5/07H05K9/00
CPCC08K13/02C08K3/22C08K3/30C08K3/38C08K5/07C08K5/09C08K5/12C08K5/20C08K5/42C08K5/50C08K2003/2289C08K2003/3009C08K2003/3045C08K2201/01C08L2201/08H05K9/0081C08L75/04
Inventor 辛草
Owner NANJING JOOZ INFORMATION SCI & TECH