Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electromagnetic shielding composite foam with oriented filler structure and preparation method thereof

A technology of electromagnetic shielding and composite foam, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of large amount of conductive filler, high preparation cost, and limited application, and achieve low cost, simple operation, and enhanced lap joints The effect of access

Pending Publication Date: 2022-03-22
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned prior art, the present invention provides an electromagnetic shielding composite foam with an oriented filler structure and its preparation method to solve the problem of the large amount of conductive filler added, high preparation cost, high density, and limited application of existing electromagnetic shielding materials. question

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
  • Electromagnetic shielding composite foam with oriented filler structure and preparation method thereof
  • Electromagnetic shielding composite foam with oriented filler structure and preparation method thereof
  • Electromagnetic shielding composite foam with oriented filler structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method of making an electromagnetic shield oriented structured packing having a composite foam, comprising the steps of:

[0032] Preparation (1) of the magnetic conductive particles

[0033] The aramid fibers were added to 1g of dilute sulfuric acid 50mL, IH mechanically stirred, washed and filtered repeatedly with distilled water to neutral, then added to an aqueous solution of stannous chloride and subjected to mechanical stirring after sensitization aryl nylon fibers were added to 100mL of plating liquid iron (ferric sulfate 10g / L, gentiobiose 5g / L), sodium citrate solution was slowly added, the reaction stirred for 10h under magnetic force, by washing, filtration, and dried to obtain metallic iron aramid fiber load magnetic conductive particles.

[0034] (2) loading metallic iron aramid fiber - Preparation of polyethylene composites

[0035] 8g of polyethylene and an aramid fiber load 1g iron metal magnetic conductive particles is placed under 5min blend mixer at...

Embodiment 2

[0041] A method of making an electromagnetic shield oriented structured packing having a composite foam, comprising the steps of:

[0042] Preparation (1) of the magnetic conductive particles

[0043] The dilute sulfuric acid was added to 1g 10mL carbon fibers, the mechanical stirring 2h, filtered and washed repeatedly with distilled water to neutral, then it was added to an aqueous solution of stannous chloride and subjected to mechanical stirring, after the carbon fibers are added to the sensitized 50mL of chemical nickel plating solution (nickel sulfate 40g / L, sodium pyrophosphate 10g / L, sodium hypophosphite 5g / L, thiourea 5g / L, ammonia 5 mL) was slowly added an aqueous solution of sodium citrate, under magnetic stirring the reaction 10min, by washing, filtration, and dried to give metallic nickel particles are supported magnetic conductive carbon fibers.

[0044] (2) supported metallic nickel - carbon fiber epoxy composite was prepared

[0045] 10g of epoxy resin and 0...

Embodiment 3

[0051] A method of preparing an electromagnetic shield composite foam having an alignment filler structure, comprising the steps of:

[0052] (1) Preparation of magnetic conductive particles

[0053] 1G basalt fibers were added to 20 mL of dilute sulfuric acid, mechanically stirred for 1 h, washed repeatedly with distilled water and filtered to neutral, and then added to aqueous solution of tin chloride and mechanically stirred, and the sensitized basalt fiber Add to 100 mL of chemical plating solution (40 g / L of sulfate, 5 g / L of tartaricate 20g / L, sodium phosphate 2 g / l, boric acid 10 g / L, ammonia water 5 mL), slowly add aqueous sodium citrate solution, in magnetic force The reaction was allowed to obtain a metal cobalt-loaded basalvan fiber magnetic conductive particles by washing, filtration, and dried to obtain metal cobalt loaded basalt fiber magnetic conductive particles.

[0054] (2) Preparation of metal cobalt load basalt fiber-polyurethane elastomer composites ...

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses electromagnetic shielding composite foam with an oriented filler structure and a preparation method thereof, and the preparation method comprises the following steps: S1, attaching magnetic particles to the surfaces of filler particles with a length-diameter ratio to obtain magnetic conductive particles; s2, blending the magnetic conductive particles with a polymer to prepare a magnetic conductive particle-polymer composite material; s3, placing the composite material obtained in S2 in a magnetic field, and orienting the magnetic particles with the length-diameter ratio along the direction of the magnetic field under the condition of 0-300 DEG C; s4, the composite material obtained in S3 is placed in a foaming gas environment and saturated for 1 min to 24 h under the conditions that the temperature ranges from 30 DEG C to 300 DEG C and the pressure ranges from 0.2 MPa to 50 MPa, then the pressure is relieved to the normal pressure at the speed of 0.1 MPa / s to 30 MPa / s, the temperature is reduced to the room temperature, and the composite material is obtained. The prepared composite foam has good electromagnetic shielding performance, the density of the material is reduced due to introduction of foam holes, the preparation method is simple, and the cost is low.

Description

Technical field [0001] The present invention belongs to the technical field of electromagnetic shielding composite materials, and particularly relates to a method for preparing a composite foam having an electromagnetic shield oriented structured packing. Background technique [0002] As society continues to progress, a large number of electronic products into people's daily life and work. Use of electronic components on the one hand gives us a lot of convenience, on the other hand also caused excessive electromagnetic radiation pollution, resulting in a series of social and environmental issues, in order to prevent various problems caused by excessive electromagnetic radiation, it has been developed and more species electromagnetic shielding protective material. Currently, the most widely used material is a metal electromagnetic shielding material, electromagnetic shielding conventional metal-based materials have a very excellent conductivity and electromagnetic shielding perfor...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08J9/30C08J9/14C08L23/06C08L63/00C08L75/04C08L83/04C08L77/10C08K9/12C08K7/06C08K7/10C08K7/14H05K9/00
CPCC08J9/122C08J9/141C08J9/009H05K9/0081C08J2323/06C08J2363/00C08J2375/04C08J2383/04C08J2367/04C08J2477/10C08J2203/06C08J2203/14
Inventor 杨建明陈于建张贺新夏友谊林鹏万玉保
Owner ANHUI UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com