High-temperature polymer-based electromagnetic shielding functionally gradient material

A high-temperature-resistant polymer and gradient functional material technology, applied in the field of polymer-based electromagnetic shielding functional materials, can solve the problems of not providing the effect or embodiment of material electromagnetic shielding, not involving high-temperature resistant resin matrix, and high processing temperature

Inactive Publication Date: 2014-04-16
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high processing temperature of this method, it is easy to reduce the conductivity of the metal conductive filler, resulting in a decline in the function of the material.
[0006] CN101704984A provides a method for preparing polymer-based conductive gradient functio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-temperature polymer-based electromagnetic shielding functionally gradient material
  • High-temperature polymer-based electromagnetic shielding functionally gradient material
  • High-temperature polymer-based electromagnetic shielding functionally gradient material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare the polymer solution, the specific process is as follows: put 6g PEI and 300m1DMF into a three-necked flask with a stirring device, and stir at room temperature until the PEI is completely dissolved at a stirring speed of 300 rpm. This solution is called Lp-1; preparation polymer / carbon-based conductive filler A solution, specific process is as follows: in the there-necked flask with stirring device, half of the solution Lp-1 is filled, the graphene of 0.6g (10wt%) is added wherein in Stir at room temperature for 300 minutes, and this solution is called La-1; prepare the polymer / metal conductive filler B solution, the specific process is as follows: put the remaining solution Lp-1 in a three-necked flask with a stirring device, add 2.4g (40wt%) nickel powder was stirred at room temperature for 300 minutes, and this solution was called Lb-1.

[0035] Preparation of high-temperature-resistant polymer-based electromagnetic shielding gradient functional materials, the...

Embodiment 2

[0037] The method is as in Example 1, replacing graphene with carbon nanotubes. The electromagnetic shielding effectiveness of the high temperature resistant polymer-based electromagnetic shielding gradient functional material and the electromagnetic shielding effectiveness after heat treatment at 200°C for 240 hours are listed in Table 1.

Embodiment 3

[0039] The method is as in Example 1, replacing graphene with graphite. The electromagnetic shielding effectiveness of the high temperature resistant polymer-based electromagnetic shielding gradient functional material and the electromagnetic shielding effectiveness after heat treatment at 200°C for 240 hours are listed in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Electromagnetic shielding effectivenessaaaaaaaaaa
Electromagnetic shielding effectivenessaaaaaaaaaa
Electromagnetic shielding effectivenessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-temperature polymer-based electromagnetic shielding functionally gradient material. The material is characterized in that the content of filler changes in a gradient manner along the thickness direction of the material. The electromagnetic shielding property of the functionally gradient material can be up to 45-90dB; the long-time working temperature of the material is 150 DEG C, and over 85% of original electromagnetic shielding property still can be kept after thermal treatment at 200 DEG C for 240 hours. Therefore, the high-temperature polymer-based electromagnetic shielding functionally gradient material can be widely applied to the fields of protection of electronic equipment products with heat-resisting and electromagnetic shielding demands or other applications.

Description

technical field [0001] The invention relates to a polymer-based electromagnetic shielding functional material, in particular to a high-temperature-resistant polymer-based electromagnetic shielding gradient functional material. Background technique [0002] Today's society is in the information age, and the wide application of electronic and electrical products has formed a complex electromagnetic environment. The electromagnetic interference and electromagnetic compatibility problems caused by this are becoming more and more serious. At the same time, the pollution of electromagnetic waves to human working and living environments has become a new environmental hazard. , threatening human health. [0003] Metal-based electromagnetic shielding materials have disadvantages such as high price, high density, easy corrosion, difficulty in adjusting shielding performance, and inconvenient use, which limit their further development. Polymer-based conductive composite materials have...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L79/08C08L81/06C08K7/06C08K7/00C08K3/04C08K3/08C08J5/18
CPCC08J5/18C08J2379/08C08J2381/06C08K3/04C08K3/08C08K7/06C08K7/24C08K9/10C08K2003/0806C08K2003/085C08K2003/0862C08L2201/08C08L79/08C08L81/06
Inventor 温变英张扬
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap