Eco-friendly fully bio-based polybenzoxazine-silica hybrid materials by sol-gel approach

In the present work, a high thermal and flame-retardant polybenzoxazine-silica hybrid material has been synthesized using renewable raw materials (including eugenol and furfurylamine) via a greener sol-gel-based approach. Inorganic component tetraethoxysilane (TEOS) was introduced into eugenol benzoxazine (BZ-E-F) with the help of (3-mercaptopropyl) trimethoxysilane (MPTMS) as a coupling agent viz thiol-ene click approach among the mercapto group (-SH) of MPTMS and allyl functional group in the eugenol. The developed BZ-E-F monomer and PBZ-E-F hybrids are characterized to check the molecular structures, curing behaviour, thermal stability and flame-retardant properties. The thermal studies reveal that the char yield increases to 67.54 from 41.32 and LOI increased to 44.52 from 34.03 for PBZ-E-F silica hybrid. The thermal and flame-resistant studies strongly suggest that the prepared sustainable and eco-friendly PBZ silica hybrid can be used to replace the petroleum-based polymeric materials for better thermal and flame-resistant applications.

Automated summary

In this study, a high thermal and flame-retardant polybenzoxazine-silica hybrid material was synthesized using renewable raw materials. The thermal and flame-resistant properties of the material were significantly improved, making it a suitable alternative to petroleum-based polymeric materials for better thermal and flame-resistant applications.