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High-thermal-conductivity electromagnetic shielding polyether-ether-ketone composite material with isolation structure as well as preparation method and application thereof

A polyetheretherketone and electromagnetic shielding technology is applied in the field of high thermal conductivity electromagnetic shielding polyetheretherketone composite material and its preparation, and can solve the problems of inability to meet the application requirements of shielding performance and the like

Active Publication Date: 2021-09-03
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of the polyether ether ketone composite material prepared by the above method is only improved to a certain extent and cannot meet the application requirements on shielding performance.

Method used

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  • High-thermal-conductivity electromagnetic shielding polyether-ether-ketone composite material with isolation structure as well as preparation method and application thereof
  • High-thermal-conductivity electromagnetic shielding polyether-ether-ketone composite material with isolation structure as well as preparation method and application thereof
  • High-thermal-conductivity electromagnetic shielding polyether-ether-ketone composite material with isolation structure as well as preparation method and application thereof

Examples

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preparation example Construction

[0032] The invention provides a method for preparing a high thermal conductivity electromagnetic shielding polyether ether ketone composite material with an isolation structure, comprising the following steps:

[0033] (1) Mix multi-walled carbon nanotubes, graphene nanosheets, benzoxazine and a soluble benzoxazine solvent for ultrasonic modification to obtain a modified hybrid filler dispersion;

[0034] (2) Mix polyether ether ketone, benzoxazine and soluble benzoxazine solvent for ultrasonic modification to obtain a modified polyether ether ketone dispersion;

[0035] (3) mixing the modified hybrid filler dispersion and the modified polyether ether ketone dispersion, and performing vacuum shearing-assisted mixing to obtain polyetheretherketone composite particles;

[0036] (4) The polyether ether ketone composite particles are solidified and crosslinked and melted and hot-pressed sequentially to obtain a high thermal conductivity electromagnetic shielding polyether ether ke...

Embodiment 1

[0050] use figure 2 As shown in the process flow chart, a high thermal conductivity electromagnetic shielding polyether ether ketone composite material with isolation structure is prepared by vacuum-assisted method, thermal cross-linked polymer modification method and melt hot pressing method. The specific steps are as follows:

[0051] Add 0.05g MWCNTs and 0.2g GnPs to 250mL PBZ acetone solution with a concentration of 1.25wt%, mix and disperse evenly, and ultrasonicate in an ultrasonic oscillator at 60MHz and room temperature for 3h to obtain a modified hybrid filler dispersion. Add 9.75 g of PEEK with a particle size of 200 mesh into 450 mL of PBZ acetone solution with a concentration of 1.25 wt %, and ultrasonicate for 1 h at 60 MHz in an ultrasonic oscillator at room temperature to obtain a modified polyether ether ketone dispersion. The modified hybrid filler dispersion and the modified polyetheretherketone dispersion are mixed for slow-release vacuum-assisted filtratio...

Embodiment 2

[0053] The high thermal conductivity electromagnetic shielding polyether ether ketone composite material with isolation structure was prepared according to the method of Example 1, and the preparation conditions of Examples 2-6 are shown in Table 1.

[0054] Table 1 Preparation conditions of Examples 1-6

[0055]

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Abstract

The invention provides a high-thermal-conductivity electromagnetic shielding polyether-ether-ketone composite material with an isolation structure and a preparation method and application thereof, and belongs to the technical field of composite materials. According to the invention, the carbon nanotubes and the graphene are used as synergistic mixed fillers, so the contact area between the fillers is increased, establishment of a filler network is facilitated, and the transmission effectiveness is improved; polybenzoxazine with a hydrogen bond effect is introduced to modify and compound the polyether-ether-ketone and the mixed filler to obtain the polyether-ether-ketone composite particle with the mixed filler as a skin layer, the polybenzoxazine as an adhesion layer and the polyether-ether-ketone particle as a core. And the high-thermal-conductivity electromagnetic shielding polyether-ether-ketone composite material with the isolation structure is obtained through cross-linking solidification and melting hot pressing. The polyetheretherketone is modified by the benzoxazine polymer layer, an isolation structure is constructed, a stable and efficient heat-conducting and electric-conducting transmission network is formed, the interface compatibility of the filler and the polymer is improved, the interface thermal resistance is reduced, and the material has good heat-conducting and electromagnetic shielding performance.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a high thermal conductivity electromagnetic shielding polyether ether ketone composite material with an isolation structure and its preparation method and application. Background technique [0002] With the innovation of advanced wireless communication technology, the application of electronic chips in some industries, especially in military, aerospace, machinery, energy and other fields, puts forward higher requirements for the densification, integration and light weight of chips. However, the miniaturization of electronic devices and circuits is accompanied by a large amount of heat accumulation, and heat dissipation has become a key factor affecting stability, reliability and life. It will affect the transmission performance of the signal system, and will seriously endanger human health and environmental friendliness. Electromagnetic waves are absorbed and convert...

Claims

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Application Information

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IPC IPC(8): C08L61/16C08L61/34C08K3/04
CPCC08L61/16C08K2201/011C08K2201/001C08L61/34C08K3/041C08K3/042
Inventor 牟建新陈瑞温丰宇杨婷成霖
Owner JILIN UNIV
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