A triazine polymer, a high-temperature resistant carbon fiber sizing agent, its preparation method and application

By using triazine polymer aqueous emulsion to reinforce the interfacial bonding between carbon fiber and thermoplastic resin, the problems of easy decomposition and solvent contamination of existing sizing agents at high temperatures are solved, and the preparation of high-performance carbon fiber thermoplastic composite materials is realized.

CN121779704BActive Publication Date: 2026-05-26SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIV
Filing Date
2026-03-04
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing carbon fiber sizing agents are prone to decomposition at high temperatures, resulting in pores and defects in the interface layer, making it difficult to form a strong bond with thermoplastic resins. Furthermore, the preparation process uses toxic solvents or complex chemical modifications, which affect the environment and production safety.

Method used

Triazine polymers are used as sizing agents, and triazine structural units and aromatic dihydroxy compounds are linked by ether bonds to form an aqueous emulsion with high thermal stability and good solubility, avoiding the use of toxic solvents and enhancing the π-π interaction between carbon fibers and thermoplastic resins.

Benefits of technology

This method achieves good interfacial bonding between carbon fiber and thermoplastic resin at high temperatures, improves the interlaminar shear strength of the composite material, avoids solvent residue problems, and is suitable for the preparation of high-performance carbon fiber thermoplastic composite materials.

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Abstract

This invention relates to the field of triazine polymer preparation technology, specifically to a triazine polymer, a high-temperature resistant carbon fiber sizing agent, a preparation method, and applications. The main chain segment of the triazine polymer is a triazine structural unit. The triazine polymer is modified by synergistically introducing two different structures: R2 is a structural unit formed by removing hydroxyl hydrogen atoms from an aromatic dihydroxy compound with a rigid aromatic backbone or aromatic ketone structure, used to improve compatibility with high-temperature resistant thermoplastic resins; R3 is a structural unit formed by removing hydroxyl hydrogen atoms from an aromatic dihydroxy compound with a large-volume substituent or lactone structure, disrupting the tight packing of the molecular chain and improving the solubility of the polymer. The triazine polymer is used in the preparation of a carbon fiber sizing agent, giving the sizing agent excellent heat resistance. This sizing agent can withstand the high-temperature molding and processing environment of special engineering plastics, resulting in a novel carbon fiber sizing agent that simultaneously possesses excellent heat resistance and interfacial compatibility.
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