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

A high thermal conductivity carbon fiber/polyether ether ketone electromagnetic shielding composite material

A technology of polyether ether ketone and electromagnetic shielding, applied in shielding materials, magnetic field/electric field shielding, electrical components, etc., can solve problems such as poor thermal conductivity, difficulty in forming a heat conduction path, and inability to build a heat conduction network

Active Publication Date: 2021-06-08
JILIN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the traditional production process, the thermal conductivity of the composite material prepared by carbon fiber and polyether ether ketone is very poor: when the carbon fiber introduction amount is 30wt.%, the thermal conductivity of the composite material is 0.97W / (m K); When the amount exceeds 70wt.%, the thermal conductivity of the composite material can reach 2W / (m·K)
The main reason for this phenomenon is the way carbon fibers are dispersed inside the matrix: carbon fibers in traditional carbon fiber / polyether ether ketone composites are independently dispersed in the matrix, and they are isolated from each other. The thermal network

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
  • A high thermal conductivity carbon fiber/polyether ether ketone electromagnetic shielding composite material
  • A high thermal conductivity carbon fiber/polyether ether ketone electromagnetic shielding composite material
  • A high thermal conductivity carbon fiber/polyether ether ketone electromagnetic shielding composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Preparation of high thermal conductivity carbon fiber / polyether ether ketone electromagnetic shielding composite material

[0019] The composite material includes 30wt.% of sulfonated polyetheretherketone and its sodium salt bicomponent, 40wt.% of polyetheretherketone and 30wt.% of carbon fiber. The melt index of polyetheretherketone is 21g / 10min; the carbon fiber is pitch-based carbon fiber, the aspect ratio is (200-2000):1, and the length is 200-500μm. The specific operation is as follows:

[0020] Dissolve 4,4'-difluorobenzophenone into 98wt.% concentrated sulfuric acid, and the mass ratio of 4,4'-difluorobenzophenone to concentrated sulfuric acid is 1:10. The reaction system was kept stirring at 100° C. for 10 h. The reaction was cooled to room temperature, and the reaction solution was poured into a large amount of ice water to cool. Then NaCl was added to the reaction solution until precipitation occurred, the product was filtered, washed repeatedly with dei...

Embodiment 2

[0052] 1. Preparation of high thermal conductivity carbon fiber / polyether ether ketone electromagnetic shielding composite material

[0053] The composite material comprises 20wt.% of sulfonated polyetheretherketone and its sodium salt, 50wt.% of polyetheretherketone and 30wt.% of carbon fiber. The melt index of PEEK is 21g / 10min; the carbon fiber is pitch-based carbon fiber, the aspect ratio is (200-2000):1, and the length is 200-500μm. The specific preparation of sulfonated polyether ether ketone and its sodium salt is the same as in Example 1, the preparation of sulfonated polyether ether ketone with a sulfonation degree of 30%, and the neutralization ratio of sulfonated polyether ether ketone sulfonate is 48.89%. Two-component sulfonated polyether ether ketone and its sodium salt.

[0054] After uniformly mixing all the raw materials in proportion, the composite material is prepared by hot pressing. Under the condition of 350°C without pressure, melt all the resin in the...

Embodiment 3

[0060] 1. Preparation of high thermal conductivity carbon fiber / polyether ether ketone electromagnetic shielding composite material

[0061] The composite material comprises 10wt.% of sulfonated polyetheretherketone and its sodium salt, 60wt.% of polyetheretherketone and 30wt.% of carbon fiber. The melt index of PEEK is 21g / 10min; the carbon fiber is pitch-based carbon fiber, the aspect ratio is (200-2000):1, and the length is 200-500μm. The specific preparation of sulfonated polyether ether ketone and its sodium salt is the same as in Example 1, the preparation of sulfonated polyether ether ketone with a sulfonation degree of 30%, and the neutralization ratio of sulfonated polyether ether ketone sulfonate is 48.89%. Two-component sulfonated polyether ether ketone and its sodium salt.

[0062] After uniformly mixing all the raw materials in proportion, the composite material is prepared by hot pressing. Under the condition of 350°C without pressure, melt all the resin in the...

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
melt flow indexaaaaaaaaaa
lengthaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a carbon fiber / polyether ether ketone electromagnetic shielding composite material with high thermal conductivity, which belongs to the field of high-performance composite materials. Calculated by mass and 100%, the electromagnetic shielding composite material is composed of 10-50wt.% sulfonated polyether ether ketone and its sodium salt two-component, 40-80wt.% polyether ether ketone, 5-30wt.% The carbon fibers are uniformly mixed in proportion and prepared by hot pressing. The two-component sulfonated polyetheretherketone and its sodium salt are obtained by reacting the sulfonated polyether ether ketone with an alkaline sodium salt solution to neutralize a part of the sulfonate groups, and the neutralization ratio of the sulfonate groups is 30% to 70%. Compared with the traditional carbon fiber / polyetheretherketone composite material, the thermal conductivity of the composite material prepared by the present invention is significantly enhanced, and at a low filling amount, the thermal conductivity of the composite material has already exceeded 2W / (m·K ). In addition, the electromagnetic shielding performance and mechanical properties of the composite material are excellent.

Description

technical field [0001] The invention belongs to the field of high-performance composite materials, and in particular relates to a high thermal conductivity carbon fiber / polyether ether ketone electromagnetic shielding composite material. Background technique [0002] Special engineering plastics have gradually developed into various fields by virtue of their advantages such as light weight, corrosion resistance, high processability and great operability. However, as a kind of polymer material, its own molecular structure makes the propagation efficiency of phonon vibration in it extremely low, and it cannot conduct timely, dissipate heat or shield electromagnetic. In order to further expand its application, it needs to be further modified to prepare thermally conductive electromagnetic shielding materials. . [0003] The blending method to prepare thermally conductive composite materials has become the main method for preparing composite materials at home and abroad due to ...

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 Patents(China)
IPC IPC(8): C08L61/16C08K7/06H05K9/00
CPCC08K2201/004C08K2201/016C08L61/16C08L2205/025H05K9/009C08K7/06
Inventor 牟建新赵轩李澍王振洋陈瑞温丰宇
Owner JILIN UNIV
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