Degradable epoxy resin based on diimine bond vanillin as well as preparation method and application of degradable epoxy resin

By introducing bisimine-linked vanillin to prepare biodegradable epoxy resin, the problem of the difficulty in degrading thermosetting epoxy resin is solved, achieving efficient degradation and chemical recycling while maintaining material properties. This method is suitable for biodegradable epoxy resin composites.

CN121021807APending Publication Date: 2025-11-28GUANGDONG LABORATORY OF CHEMISTRY & FINE CHEMICAL IND JIEYANG CENTER JIEYANG +1
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Patent Information

Application Number
CN202511222828.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-29
Publication Date
2025-11-28

AI Technical Summary

Technical Problem

Existing thermosetting epoxy resins are difficult to degrade, leading to resource waste and environmental pollution. Furthermore, traditional degradation methods are inefficient and can damage material properties.

Method used

By introducing bisimine-bonded vanillin, a biodegradable epoxy resin based on bisimine-bonded vanillin is prepared. Utilizing the reversible dissociation property of imine bonds, the epoxy resin is degraded under acidic or amine solvent conditions, and the fiber material is recycled.

Benefits of technology

It achieves efficient degradation and chemical recycling of epoxy resin, maintaining the mechanical properties and thermal stability of the material, with tensile strength reaching 70-110 MPa, Td5% reaching above 320℃, and chemical recycling efficiency reaching up to 100%.

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Abstract

The invention belongs to the technical field of degradable and recyclable epoxy resin, and discloses degradable epoxy resin based on diimine bond vanillin as well as a preparation method and application of the degradable epoxy resin. The epoxy resin chain extender containing the biimine bond bio-based is prepared through a Schiff base reaction, the epoxy resin chain extender and epoxy resin are subjected to ring opening, finally, the epoxy resin chain extender and the curing agent containing amido are subjected to high-temperature curing, and the degradable and recyclable thermosetting epoxy resin and the degradable carbon fiber composite material which have excellent mechanical properties are prepared. The problem of recycling the thermosetting epoxy resin and the composite material is solved, sustainable utilization of resources is realized, and environmental pollution is reduced.
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