What question did this study set out to answer?

This research aims to validate a new bio-derived epoxy vitrimer system with enhanced mechanical properties.

February 13, 2026Open Access

Experimental Validation of Hempoxies 20.1: A Hierarchical Carbon-Reinforced Bio-Vitrimer Composite System with Dynamic Covalent Networks

Key Points

This research aims to validate a new bio-derived epoxy vitrimer system with enhanced mechanical properties.
Developed Hempoxies 20 using epoxidized hempseed oil and furfuryl glycidyl ether as a diluent.
Catalyzed dynamic transesterification with zinc acetate.
Incorporated hierarchical carbon powder reinforcement including milled hemp fibers and biochar.
Conducted tests to measure viscosity, tensile strength, glass transition temperature, and thermal self-healing efficiency.
Reduced matrix viscosity to less than 10 Pa·s, facilitating better reinforcement dispersion.
Achieved tensile strength exceeding 80 MPa in the composite material.
Demonstrated a glass transition temperature greater than 100 °C.
Obtained high thermal self-healing efficiency of over 85%.

Abstract

Bio-based epoxy resins are often limited by high melt viscosity ( η ∗ > 50 Pa·s at 25 ◦ C) and insufficient mechanical performance (tensile strength 80 MPa, glass transition temperature T g > 100 ◦ C, topology freezing temperature 40 85%. This study constitutes a novel fully hemp-derived vitrimer composite system and establishes processing–structure–property relationships for recyclable, structural-grade biocomposites.

Experimental Validation of Hempoxies 20.1: A Hierarchical Carbon-Reinforced Bio-Vitrimer Composite System with Dynamic Covalent Networks

Key Points

Abstract

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