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A kind of polymer shielding material and preparation method thereof

A technology of shielding material and polymer, applied in the field of polymer shielding material and its preparation, can solve the problems of difficult molding and processing, heavy weight, limited application, etc., and achieve the effects of light weight, good shielding performance and simple preparation process

Active Publication Date: 2017-11-28
SUZHOU KUANWEN ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the shielding materials currently used are metal materials, but metal shielding materials are not only difficult to form and process, but also heavy, which limits their wider application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing a polymer shielding material, comprising the steps of:

[0020] 1) Weigh each raw material: by weight: 30 parts of polyphenylene sulfide, 20 parts of polyethylene, 5 parts of graphene oxide, 4 parts of carbon fiber, 3 parts of dolomite, 2 parts of boron nitride, maleic anhydride 3 parts of grafted polyethylene, 1 part of POE, 18 parts of 0.5mol / L nitric acid, 6 parts of hydrazine hydrate, 1 part of antioxidant, 1 part of coupling agent and appropriate amount of dichloroethane;

[0021] 2) Put the carbon fiber and graphite oxide in the raw material in a solution of 0.5mol / L nitric acid, ultrasonically disperse for 2 hours, filter, wash and dry, and set aside;

[0022] 3) Put the treated short fibers and graphite oxide in 2) in dichloroethane, then add hydrazine hydrate, heat up to 110°C and stir, after stirring for 3 hours, cool to 40°C, continue to add dolomite and boron nitride , stir evenly, and after drying, a mixed powder is obtained;

[002...

Embodiment 2

[0026] A method for preparing a polymer shielding material, comprising the steps of:

[0027] 1) Weigh each raw material: by weight: 52 parts of polyphenylene sulfide, 40 parts of polyethylene, 11 parts of graphene oxide, 12 parts of carbon fiber, 16 parts of dolomite, 11 parts of boron nitride, maleic anhydride 10 parts of grafted polyethylene, 5 parts of POE, 30 parts of 0.5mol / L nitric acid, 20 parts of hydrazine hydrate, 4 parts of antioxidant, 5 parts of coupling agent and appropriate amount of dichloroethane;

[0028] 2) Put the carbon fiber and graphite oxide in the raw material in a solution of 0.5mol / L nitric acid, ultrasonically disperse for 5h, filter, wash and dry, and set aside;

[0029] 3) Put the treated short fibers and graphite oxide in 2) in dichloroethane, then add hydrazine hydrate, heat up to 110°C and stir, after stirring for 6 hours, cool to 60°C, continue to add dolomite and boron nitride , stir evenly, and after drying, a mixed powder is obtained;

...

Embodiment 3

[0033] A method for preparing a polymer shielding material, comprising the steps of:

[0034] 1) Weigh each raw material: by weight: 41 parts of polyphenylene sulfide, 30 parts of polyethylene, 8 parts of graphene oxide, 8 parts of carbon fiber, 10 parts of dolomite, 6 parts of boron nitride, maleic anhydride 7 parts of grafted polyethylene, 3 parts of POE, 24 parts of 0.5mol / L nitric acid, 13 parts of hydrazine hydrate, 2 parts of antioxidant, 3 parts of coupling agent and appropriate amount of dichloroethane;

[0035] 2) Put the carbon fiber and graphite oxide in the raw material in a solution of 0.5mol / L nitric acid, disperse ultrasonically for 3 hours, filter, wash and dry, and set aside;

[0036] 3) Put the treated short fibers and graphite oxide in 2) in dichloroethane, then add hydrazine hydrate, heat up to 110°C and stir, after stirring for 4 hours, cool to 50°C, continue to add dolomite and boron nitride , stir evenly, and after drying, a mixed powder is obtained;

...

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PUM

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Abstract

The invention discloses a polymer shielding material and a preparation method thereof. The polymer shielding material is composed of the following raw materials in parts by weight: 30-52 parts of polyphenylene sulfide, 20-40 parts of polyethylene, 5-11 parts of graphene oxide, 4-12 parts of carbon fiber, 3-16 parts of dolomite, 2-11 parts of boron nitride, 3-10 parts of maleic anhydride grafted polyethylene, 1-5 parts of POE, 18-30 parts of 0.5 mol / L nitric acid, 6-20 parts of hydrazine hydrate, 1-4 parts of an antioxidant, 1-5 parts of a coupling agent and a moderate amount of ethylene dichloride. The polymer shielding material prepared according to the invention is light in weight and simple in preparation process, the shielding effectiveness value of the obtained shielding material in the range of 30-1500 MHz is 65-88 dB, the shielding performance is good, and the application range of the shielding material can be widened.

Description

technical field [0001] The invention belongs to the field of shielding materials, in particular to a polymer shielding material and a preparation method thereof. Background technique [0002] With the rapid development of information electronics technology, the influence of electromagnetic waves generated by electronic equipment, wires and cables, motors, etc. on surrounding equipment and signals has attracted more and more attention and attention. Therefore, in order to protect the normal operation of equipment, it is often necessary to effectively shield electromagnetic waves. [0003] Shielding is the use of shields (materials with specific properties) to prevent or attenuate the transmission channel of electromagnetic interference energy, thereby suppressing electromagnetic interference. Shielding can limit the electromagnetic energy leakage of internal radiation, and can prevent external radiation interference from entering. Because the shielding material plays the ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08L23/06C08L51/06C08L23/08C08K13/06C08K9/02C08K7/06C08K3/04C08K3/38C08K5/24C08K3/26
Inventor 翁宇飞张其笑
Owner SUZHOU KUANWEN ELECTRONICS SCI & TECH