Preparation method of modified polyether ether ketone composite material and application thereof in preparation of high-temperature insulating coating

By modifying the surface of nano-silica and optimizing the dispersion process, the prepared modified polyether ether ketone composite material solves the problem of the difficulty in uniformly dispersing nano-silica in PEEK matrix, and realizes the high-performance application of high-temperature insulating coatings and enameled wires.

CN122213652APending Publication Date: 2026-06-16NANTONG INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANTONG INST OF TECH
Filing Date
2026-04-08
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

In existing technologies, it is difficult to achieve uniform dispersion of nano-silica in a pure PEEK matrix, resulting in insufficient thermal stability of the composite material, which makes it difficult to meet the application requirements of high-temperature insulating coatings such as enameled wires for new energy vehicles.

Method used

γ-glycidyl etheroxypropyltrimethoxysilane (KH-560) was used to modify the surface of nano-silica. Combined with ultrasonic dispersion and planetary ball milling, modified polyether ether ketone composite material was prepared. The uniform dispersion of nano-silica in the PEEK matrix was achieved by forming covalent bonds between the epoxy groups of KH-560 and the PEEK matrix.

Benefits of technology

It significantly improves the thermal stability and insulation durability of modified polyetheretherketone composite materials, enhances the toughness and crystallinity of the materials, and strengthens the interfacial bonding strength, making it suitable for high-temperature insulation coatings and enameled wire applications.

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Abstract

The application discloses a preparation method of modified polyether ether ketone composite material and application of the modified polyether ether ketone composite material in preparation of high-temperature insulation coating. The preparation method comprises the following steps: S1, mixing a solution containing KH-560 with nano-silicon dioxide, ultrasonic dispersion reaction is carried out at 50-60 DEG C for 2-3 hours, and then the solvent is removed to obtain modified nano-silicon dioxide; S2, after the prepared modified nano-silicon dioxide is premixed with polyether ether ketone powder, ball milling is carried out in a planetary ball mill, drying is carried out, heat treatment is carried out, and furnace cooling is carried out, and then the modified polyether ether ketone composite material is obtained. According to the scheme, the surface of the silicon dioxide is modified by the epoxy group of KH560, the epoxy group of KH560 is combined with the PEEK matrix to form a covalent bond, and the interface bonding strength and the thermal stability are significantly improved. On this basis, the nano-level uniform dispersion of the silicon dioxide in the pure PEEK matrix is realized by combining the ultrasonic dispersion and the planetary ball milling process.
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