High-thermal-conductivity polyetheretherketone electromagnetic shielding composite material and preparation method thereof

Abstract

The invention discloses a high-thermal-conductivity polyetheretherketone electromagnetic shielding composite material and a preparation method thereof, and belongs to the technical field of high-performance composite materials. The composite material is prepared by uniformly mixing 10-50 wt% of a spherical core-shell structure high-thermal-conductivity filler, 5-10 wt% of a carbon fiber, and the balance of polyetheretherketone according to the mass sum of 100% under certain processing conditions. Experimental results show that the product has an arc-shaped shell, and is a thermal-conducting graphite shell obtained by stripping off the spherical core-shell filler under a liquid nitrogen condition, and so that the high-thermal-conductivity filler with the core-shell structure is successfullyintroduced into the polyetheretherketone composite material. It is also proved that the filler shell still keeps the original distribution state no matter under a high-temperature or freezing condition, so that the production of the high-thermal-conductivity electromagnetic shielding material by constructing filler distribution of a special structure is achieved. The problems of agglomeration, poor dispersivity, too large filling amount and small heat conductivity increasing amplitude of fillers are solved.

Description

technical field [0001] The invention belongs to the technical field of high-performance composite materials, and in particular relates to a high thermal conductivity polyetheretherketone electromagnetic shielding composite material and a preparation method thereof. Background technique [0002] Polymer materials have been gradually used in various fields by virtue of their advantages such as light weight, good chemical stability, and high mechanical strength. However, as a polymer material, its own molecular structure makes the propagation efficiency of phonon vibrations in it extremely low, so most materials have heat insulation and no electromagnetic shielding performance, which makes polymer materials unable to be used in some fields . For example, electronic components, electromagnetic shielding partitions and other fields. To address the above requirements, polymer materials need to be further modified into composite materials. [0003] As one of the most commonly us...

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Problems solved by technology

[0005] In order to solve the above disadvantages and deficiencies, the present invention provides a high thermal conductivity polyetheretherketone electromagnetic shielding composite material and its preparation method. Specifically, the high thermal conductivity polyetheretherketone composite material is prepared by using a special structure of thermal conductive filler to construct a thermal network, which solves the problem of Problems such as filler agglomeration is not easy to disperse, filling amount is too large, thermal conductivity is small, etc.

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