In situ grafting of silica nanoparticle precursors with covalently attached bioactive agents to form pva-based materials for sustainable active packaging

Miri Klein, Anat Molad Filossof, Idan Ashur, Sefi Vernick, Michal Natan-Warhaftig, Victor Rodov, Ehud Banin, Elena Poverenov

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Sustainable antibacterial–antioxidant films were prepared using in situ graftings of silica nanoparticle (SNP) precursors with covalently attached bioactive agents benzoic acid (ba) or curcu-min (cur) on polyvinyl alcohol (PVA). The modified PVA-SNP, PVA-SNP-ba and PVA-SNP-cur films were characterized using spectroscopic, physicochemical and microscopic methods. The prepared films showed excellent antibacterial and antioxidant activity, and increased hydrophobicity providing protection from undesired moisture. The PVA-SNP-ba films completely prevented the growth of the foodborne human pathogen Listeria innocua, whereas PVA-SNP-cur resulted in a 2.5 log reduction of this bacteria. The PVA-SNP-cur and PVA-SNP-ba films showed high antioxidant activity of 15.9 and 14.7 Mm/g TEAC, respectively. The described approach can serve as a generic platform for the formation of PVA-based packaging materials with tailor-made activity tuned by active substituents on silica precursors. Application of such biodegradable films bearing safe bioac-tive agents can be particularly valuable for advanced sustainable packaging materials in food and medicine.

Original languageEnglish
Article number2889
JournalPolymers
Volume13
Issue number17
DOIs
StatePublished - 27 Aug 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • Active package
  • Antimicrobial
  • Antioxidant
  • Polyvinyl alcohol
  • Silica nanoparticle

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