Functional Properties of Plasticized Bio-Based Poly(Lactic Acid)_Poly(Hydroxybutyrate) (PLA_PHB) Films for Active Food Packaging

Nuria Burgos, Ilaria Armentano, Elena Fortunati, Franco Dominici, Francesca Luzi, Stefano Fiori, Francesco Cristofaro, Livia Visai, Alfonso Jiménez, José M. Kenny

Research output: Contribution to journalArticle

Abstract

Fully bio-based and biodegradable active films based on poly(lactic acid) (PLA) blended with poly(3-hydroxybutyrate) (PHB) and incorporating lactic acid oligomers (OLA) as plasticizers and carvacrol as active agent were extruded and fully characterized in their functional properties for antimicrobial active packaging. PLA_PHB films showed good barrier to water vapor, while the resistance to oxygen diffusion decreased with the addition of OLA and carvacrol. Their overall migration in aqueous food simulant was determined and no significant changes were observed by the addition of carvacrol and OLA to the PLA_PHB formulations. However, the effect of both additives in fatty food simulant can be considered a positive feature for the potential protection of foodstuff with high fat content. Moreover, the antioxidant and antimicrobial activities of the proposed formulations increased by the presence of carvacrol, with enhanced activity against Staphylococcus aureus if compared to Escherichia coli at short and long incubation times. These results underlined the specific antimicrobial properties of these bio-films suggesting their applicability in active food packaging.

Original languageEnglish
Pages (from-to)770-780
Number of pages11
JournalFood and Bioprocess Technology
Volume10
Issue number4
DOIs
Publication statusPublished - Apr 1 2017

Keywords

  • Active packaging
  • Antibacterial properties
  • Bio-films
  • Carvacrol
  • Lactic acid oligomers
  • Migration

ASJC Scopus subject areas

  • Food Science
  • Safety, Risk, Reliability and Quality
  • Process Chemistry and Technology
  • Industrial and Manufacturing Engineering

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  • Cite this

    Burgos, N., Armentano, I., Fortunati, E., Dominici, F., Luzi, F., Fiori, S., Cristofaro, F., Visai, L., Jiménez, A., & Kenny, J. M. (2017). Functional Properties of Plasticized Bio-Based Poly(Lactic Acid)_Poly(Hydroxybutyrate) (PLA_PHB) Films for Active Food Packaging. Food and Bioprocess Technology, 10(4), 770-780. https://doi.org/10.1007/s11947-016-1846-3