Continuous fiber-reinforced polyhexahydrotriazine 3D printed composite

By using continuous fiber-reinforced polyhexahydrotriazine resin as a 3D printing consumable, a biodegradable and recyclable thermosetting resin-based composite material was prepared, solving the problems of insufficient mechanical properties and non-recyclability in existing technologies, and realizing the application of 3D printing materials with high mechanical properties and environmental friendliness.

CN115725153BActive Publication Date: 2026-01-13SOUTH CHINA UNIV OF TECH
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Patent Information

Application Number
CN202211496464.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-25
Publication Date
2026-01-13
Estimated Expiration
2042-11-25

AI Technical Summary

Technical Problem

In existing 3D printing technologies, continuous fiber reinforced composite materials have weak load-bearing capacity, poor interlayer properties, and low tensile strength when high mechanical performance requirements are required. Furthermore, traditional thermosetting resins make the materials non-recyclable, resulting in resource waste and environmental pollution.

Method used

Continuous fiber-reinforced polyhexahydrotriazine resin is used as a 3D printing consumable. Taking advantage of its dynamic covalent bond structure of hexahydrotriazine ring, it has good plasticity under printing conditions and forms a biodegradable and recyclable thermosetting resin-based composite material through a special preparation method.

Benefits of technology

A continuous fiber-reinforced polyhexahydrotriazine 3D printing composite material with high mechanical properties has been developed. It has excellent mechanical properties and heat resistance, and can be degraded and recycled under certain conditions, solving the problem of non-recyclable materials and reducing resource waste and environmental pollution.

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Abstract

The present application belongs to the technical field of 3D printing of composite materials, and particularly relates to a continuous fiber reinforced polyhexahydrotriazine 3D composite material. A polyhexahydrotriazine prepolymer solution is used to impregnate continuous fiber filaments or continuous fiber tapes through a dipping device, the content of the glue solution and the shape of the filaments or tapes are adjusted through a glue solution extrusion mechanism, the solvent is removed and the resin is completely solidified through a heat flow channel, the cross-sectional shape of the consumable is adjusted through a shaping mechanism, and the 3D printing consumable is obtained after cooling. The consumable structure includes 25% to 75% of continuous fiber filaments or tapes in terms of volume percentage, and 25% to 75% of completely solidified polyhexahydrotriazine resin. The printing consumable has good plasticity, and can be printed through 3D printing technologies such as fused deposition or automatic filament laying and automatic tape laying without relying on thermoplastic plastic as an adhesive. The continuous fiber reinforced resin-based composite material obtained by printing the above consumable has excellent mechanical, heat-resistant and chemical-resistant properties, and can be degraded and recycled under special conditions.
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Citation Information

Patent Citations

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