A method for preparing ramie fiber reinforced bio-based polycarbonate composite material

By copolymerizing furanyl dicarboxylic acid with isosorbide to modify ramie fibers, the problem of poor compatibility between ramie fibers and bio-based polycarbonate was solved, and a high-strength and highly compatible ramie fiber-reinforced bio-based polycarbonate composite material was prepared, improving the material's processing performance and crack resistance.

CN122080455APending Publication Date: 2026-05-26东莞市丰龙新材料有限公司
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Patent Information

Application Number
CN202610431913.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-02
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In the existing technology, ramie fiber has poor compatibility with bio-based polycarbonate, resulting in poor reinforcement effect, and traditional modification methods cannot effectively improve its bonding strength and compatibility.

Method used

Ramie fibers modified with isosorbide difuranate were prepared by copolymerizing furanyl dicarboxylic acid and isosorbide with the hydroxyl groups on the surface of ramie fibers. These fibers were then blended with bio-based polycarbonate to form a ramie fiber-reinforced bio-based polycarbonate composite material.

Benefits of technology

It improves the bonding strength and compatibility between ramie fiber and bio-based polycarbonate, enhances the processing performance and stress crack resistance of the composite material, and the preparation process is simple and requires no additional equipment investment.

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Abstract

This invention belongs to the technical field of fiber-reinforced polymer composite materials, specifically relating to a method for preparing ramie fiber-reinforced bio-based polycarbonate composite materials. First, ramie fibers modified with isosorbide difuranate are synthesized. Then, 100 parts by weight of bio-based polycarbonate, 10-50 parts by weight of isosorbide difuranate-modified ramie fibers, and 0.1-1.0 parts by weight of antioxidant are mixed evenly and added to a hopper. The ramie fiber-reinforced bio-based polycarbonate composite material is then prepared using a twin-screw extruder. In this method, isosorbide difuranate, isosorbide, and ramie fibers are all bio-based materials, and their proportions are adjustable. Isosorbide difuranate contains a large number of ester bonds, and the isosorbide structure is identical to the alcohol structural unit in bio-based polycarbonate, effectively enhancing the compatibility between ramie fibers and bio-based polycarbonate.
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Citation Information

Patent Citations

  • Polycarbonate / natural fiber composite material and preparation method thereof

    CN103788617A

  • Polycarbonate / ramie fiber composite material and preparation method thereof

    CN118515960A