Design of Rectifiable Bio-based Polybenzoxazine for Stimulated Self-Healing and Shape Memory applications with antimicrobial activity

Abstract

Worldwide, recycling of bio-waste into fixable self-healing materials is a big challenge, in this paper, a feasible approach used for to synthesis partially bio-based benzoxazine from cashew nut shells. Melamine, cardanol and paraformaldehyde have been used to develop bio-based benzoxazine monomer through the Mannich condensation reaction, which is then thermally co-polymerized with 2-Mercaptoethanol and Polyurethane. The structure of the monomer and composites have been confirmed by using traditional spectroscopy techniques. Our modified bio-based polybenzoxazine showed good self-healing and shape memory properties. The duration of the recovery process was significantly influenced by the thiol and polyurethane unit. The self-healing property of Poly(SH-co-CDL-m) Poly(U1/SH-co-CDL-m), Poly(U2/SH-co-CDL-m) was investigated with Scanning Electronic Microscopy analysis and Optical Microscopy analysis. Finally, the resultant bio-based CDL-m polybenzoxazine, which is achieved the goal of cleaner production by using biomass and reducing petrochemical recourses, production and energy emission.