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Application of electromagnetic material modification method in preparation of polyimide foam electromagnetic shielding material

An electromagnetic shielding material, polyimide technology, used in magnetic field/electric field shielding, conductive coatings, electrical components, etc., can solve the problems of material performance impact, poor chemical and thermal stability, etc., to achieve strong electromagnetic shielding ability, no poison effect, easy mass production

Pending Publication Date: 2022-03-11
GUIZHOU AEROSPACE TIANMA ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention cannot guarantee the complete reduction of graphene oxide to graphene. The unreduced graphene oxide contains hydroxyl, carbonyl, carboxyl, epoxy, etc., which has poor chemical and thermal stability, which will affect the performance of the final material.

Method used

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  • Application of electromagnetic material modification method in preparation of polyimide foam electromagnetic shielding material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Application of an electromagnetic material modification method in the preparation of polyimide foam electromagnetic shielding materials.

[0027] Further, the electromagnetic material is composed of 5.0g graphene monolayer sheet, 5.0g Fe 3 o 4 Powder composition.

[0028] Further, the Fe 3 o 4 The particle size of the powder is 80nm.

[0029] 2. The method for modifying the electromagnetic material is to use a silane coupling agent to modify the surface of the electromagnetic material under the condition of ultrasonic treatment.

[0030] Further, the silane coupling agent is KH550.

[0031] Further, the ultrasonic, specifically, the ultrasonic power is 100W, the ultrasonic duration is 10 minutes, the stirring speed is 60 rpm, and the stirring duration is 10 minutes.

[0032] 3. The preparation method of the electromagnetic shielding material:

[0033] (1) First, the electromagnetic material is dispersed in a mixed solution of 100.0g tetrahydrofuran and 40.0g w...

Embodiment 2

[0037] 1. Application of an electromagnetic material modification method in the preparation of polyimide foam electromagnetic shielding materials.

[0038] Further, the electromagnetic material is composed of 2.0g graphene monolayer sheet, 8.0g Fe 3 o 4 Powder composition.

[0039] Further, the Fe 3 o 4 The particle size of the powder is 100nm.

[0040] 2. The method for modifying the electromagnetic material is to use a silane coupling agent to modify the surface of the electromagnetic material under the condition of ultrasonic treatment.

[0041] Further, the silane coupling agent is a mixture of 0.5g A171 and 1.5g KH570.

[0042] Further, the ultrasonic, specifically, the ultrasonic power is 100W, the ultrasonic duration is 20 minutes, the stirring speed is 60 rpm, and the stirring duration is 20 minutes.

[0043] 3. The preparation method of the electromagnetic shielding material:

[0044] (1) First, disperse the electromagnetic material in a mixed solution of 100.0g ...

Embodiment 3

[0048] 1. Application of an electromagnetic material modification method in the preparation of polyimide foam electromagnetic shielding materials.

[0049] Further, the electromagnetic material is composed of 8.0g graphene monolayer sheet, 2.0g Fe 3 o 4 Powder composition.

[0050] Further, the Fe 3 o 4 The particle size of the powder is 60nm.

[0051] 2. The method for modifying the electromagnetic material is to use a silane coupling agent to modify the surface of the electromagnetic material under the condition of ultrasonic treatment.

[0052] Further, the silane coupling agent is a mixture of 2.5g Si602 and 2.5g D69.

[0053] Further, the ultrasonic, specifically, the ultrasonic power is 150W, the ultrasonic duration is 30 minutes, the stirring speed is 100 rpm, and the stirring duration is 30 minutes.

[0054] 3. The preparation method of the electromagnetic shielding material:

[0055] (1) At first the electromagnetic material is dispersed in the mixed solution o...

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Abstract

The invention belongs to the technical field of preparation of electromagnetic shielding materials, and particularly relates to application of an electromagnetic material modification method in preparation of a polyimide foam electromagnetic shielding material. After the silane coupling agent is adopted to perform surface modification on the graphene and the Fe3O4 powder, a conductive synergistic enhancement effect can be generated, a stronger electromagnetic shielding capability is obtained, and the shielding material with excellent electromagnetic shielding performance, flame-retardant and fireproof performance, low toxicity and heat preservation and heat insulation performance can be obtained by directly coating the surface of polyimide foam with the graphene and Fe3O4 composite material. The preparation method is simple, can be used for preparing shielding materials with various sizes, is easy for large-scale production, has no pollution to the environment and has no toxic effect on human bodies.

Description

technical field [0001] The invention belongs to the technical field of preparation of electromagnetic shielding materials, and in particular relates to the application of an electromagnetic material modification method in the preparation of polyimide foam electromagnetic shielding materials. Background technique [0002] With the rapid development of electronic industry technology, more and more electronic and electrical equipment of Heyang are used in daily life, industry and military. Radiation of a large number of electromagnetic waves of different wavelengths and frequencies, these electromagnetic waves will cause more or less harm to other equipment and organisms, which is called electromagnetic pollution (Electro-Magnetic Interference, EMI), in order to reduce or eliminate the impact of these electromagnetic waves on other equipment and Due to the influence of living things, electromagnetic shielding materials came into being. Commonly used electromagnetic shielding m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/36C09D1/00C09D5/24C09D5/18H05K9/00C08L79/08
CPCC08J9/365C09D1/00C09D5/24C09D5/18H05K9/0081C08J2379/08
Inventor 丁泽卢小莲柴鲜花杨大磊史建超
Owner GUIZHOU AEROSPACE TIANMA ELECTRICAL TECH