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%.