Development of sustainable and antimicrobial film based on polybenzoxazine and cellulose

A new dass of bio based polymer blends have been prepared from a modified chitosan based benzoxazine precursor (E-ch) and amino cellulose (AC). AC was derived from cellulose with excellent film-forming, biocompatibility and biodegradability property. E-ch was synthesized from eugenol, modified chitosan and paraformaldehyde. The chemical structure was confirmed by FT-IR and H-1 NMR analyses. Bio films were prepared by mixing E-ch and AC with diluted acetic add, in different ratios. These films were further cross-linked by applying heat, via ring-opening polymerization of benzoxazine without any curing agent. FT-IR and DSC were used to study the effects of AC on E-ch to form cross-linked network polymer films [poly(E-ch)/ACI. Hydrogen bonding interactions were found to exist between poly( E-ch) and AC. These kinds of interactions considerably improve the mechanical and thermal properties and char yield of the polymer films. Additionally, these biofilms: poly(E-ch) and poly(E-ch)/AC have been examined for bio-activity with S. aureus. It is confirmed that these bio-films are effective in inhibiting bio-film related infection. In a similar way, both the bio-films act against C. albicans and thus avoid the formation of mycological infection. These results expose that poly(E-ch) and AC bio-films are capable to act as anti-microbial and anti-fungal agents. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

A new class of bio-based polymer blends were prepared by using a modified chitosan-based benzoxazine precursor and amino cellulose. The resulting films showed improved mechanical and thermal properties due to hydrogen bonding interactions, as well as exhibited antimicrobial and antifungal activities against specific bacteria and fungi.