A carbon fiber reinforced polyetheretherketone composite material and its preparation method

By introducing PPESK prepreg tape between carbon fiber and polyetheretherketone resin and adopting a segmented pressure heating molding process, the problem of poor bonding force between carbon fiber and resin was solved, and the mechanical and bending properties of the composite material were significantly improved.

CN122075801APending Publication Date: 2026-05-26DALIAN UNIV OF TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Filing Date
2026-02-28
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing interfacial bonding between carbon fiber and polyetheretherketone resin is poor, resulting in poor mechanical properties of the composite material. Furthermore, existing modification methods are cumbersome or ineffective.

Method used

Carbon fiber reinforced polyetheretherketone (PEEK) composites were prepared by alternating layers of PPESK prepreg tape and pure PEEK and by a segmented pressure heating molding process. PPESK was used as an adhesive to improve interfacial bonding and enhance the mechanical properties of the composites.

Benefits of technology

It improves the bending and mechanical properties of composite materials, reduces interfacial delamination, enhances the bonding force between fibers and resin, and improves the overall strength and modulus of the material.

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Abstract

This invention discloses a carbon fiber reinforced polyetheretherketone (PEEK) composite material and its preparation method. The composite material comprises alternating layers of PPESK prepreg tape and pure PEEK, with the top and bottom layers being PPESK prepreg tape, and is obtained by compression molding. The mass ratio of PPESK prepreg tape to pure PEEK in the composite material is (60~80):(20~40). The preparation method includes the following steps: after desizing carbon fiber, PPESK prepreg tape is obtained by solution impregnation; PPESK prepreg tape and pure PEEK are alternately laid in layers, with the top and bottom layers being prepreg tape, to obtain a blank; the blank is pressurized and heated to form a carbon fiber reinforced resin matrix composite material. This invention adopts an integrated compression molding process, which has strong process feasibility and fully combines the high strength of carbon fiber with the excellent mechanical properties of PEEK. PPESK acts as a "binder" between carbon fiber and PEEK, improving the mechanical properties of the composite material. The resulting sheet has a flexural strength of 1240 MPa and a flexural modulus of 84.263 GPa.
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