High thermal conductive polyaryletherketone composite material and preparation method thereof

By employing electrostatic adsorption and braided lamination processes, the problem of insufficient thermal conductivity in polyaryletherketone (PBO) materials has been solved, resulting in a composite material with high thermal conductivity and low thermal resistance. This maintains the high strength and insulation properties of PBO fibers and expands their functional applications.

CN122127784APending Publication Date: 2026-06-02江苏君华特种高分子材料股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江苏君华特种高分子材料股份有限公司
Filing Date
2026-04-08
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing polyaryletherketone (PBO) materials have poor intrinsic thermal conductivity, making it difficult to meet the heat dissipation requirements of high-power-density equipment. Furthermore, traditional methods of adding thermally conductive fillers can easily lead to a decline in mechanical properties and insulation reliability. PBO fibers are prone to breakage under high temperature and high shear, and their interfacial compatibility is limited, making it difficult to form an efficient thermal conduction path.

Method used

Electrostatic adsorption technology is used to coat PAEK powder with PBO continuous fibers. Combined with weaving and lamination processes, a continuous fiber structure is formed. PAEK is melted and impregnated on the fiber surface by heating and pressure to form a strong chemical bonding interface and construct a continuous thermally conductive network.

Benefits of technology

It effectively retains the high strength and high thermal conductivity of PBO fibers, achieving high thermal conductivity and low thermal resistance in the material, while maintaining excellent insulation and mechanical properties. It can also be pre-filled with thermally conductive fillers to expand functional applications.

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Abstract

This invention relates to the field of polyaryletherketone (PBO) composite materials, specifically to a high thermal conductivity PBO composite material and its preparation method. The composite material includes PBO and PAEK materials, with the PBO material existing in the form of continuous fibers. The method includes the following steps: PAEK powder is attached to the surface of activated PBO continuous fibers by electrostatic adsorption to form pre-coated continuous fibers; one or more bundles of pre-coated continuous fibers are arranged closely in parallel along a single direction, and PAEK powder is spot-welded to the fiber surface or multiple bundles of fibers are fixed in a heating environment below the melting point temperature of PAEK but above its glass transition temperature to obtain a unidirectional prepreg; it is woven with a PBO-based fine-structure material, and the resulting composite fabric is laminated and pressed with a PAEK film and then annealed to obtain the composite material. This invention achieves complete wetting of the PBO thermally conductive fiber interface, with a small amount of fiber added and a continuous thermally conductive network, maximizing thermal conductivity.
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