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Active bio-based packaging for fresh-cut melon: antimicrobial efficacy and zinc migration of nanocellulose/ZnO nanocomposite films

2026-10-01Artigo de investigação Acesso aberto
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dc.contributor.authorMendes, Ana Rita
dc.contributor.authorSilva, Francisco A. G. Soares
dc.contributor.authorMena, Cristina
dc.contributor.authorSilva, Fátima
dc.contributor.authorSilva, Cristina L. M.
dc.contributor.authorTeixeira, Paula
dc.contributor.authorPoças, Fátima
dc.date.accessioned2026-04-21T15:47:34Z
dc.date.available2026-04-21T15:47:34Z
dc.date.issued2026-10-01
dc.description.abstractGrowing environmental concerns, together with the need to extend shelf life and protect food from pathogens and mechanical damage, are driving the development of innovative active packaging materials. In this study, nanocellulose (NC) films incorporating zinc oxide nanoparticles (ZnO NPs) with three different morphologies (spherical, sheet and flower) were produced by solvent casting for food packaging applications. Films were characterised by scanning electron microscopy (SEM), and antimicrobial activity was addressed by agar diffusion assay against Escherichia coli and Staphylococcus aureus. NC/ZnO films were used as package for fresh-cut melon, which was stored at 4 °C for one week, and subjected to microbiological, pH and zinc migration analysis. SEM revealed a porous, and nanofibrillar cellulose, suitable for NP retention, while cross sections showed the dispersion of NPs among the films. In vitro antimicrobial studies demonstrated the influence of morphology, with the sheet shape producing the highest inhibitory halos. In contact with melon, NC/ZnO films suppressed microbial proliferation relative to controls, keeping microbiological levels within acceptable limits up to day 7. Sheet shape showed the most significant effect. Total Zn migration plateaued at 7–8 mg kg-1 under a realistic area-to-mass scenario, with no significant differences among morphologies. Measurements reflect total Zn after acid digestion and ionic versus particulate species could not be distinguished. NC/ZnO films maintained slightly higher pH than controls. Overall, these findings highlight the potential of bio-based NC/ZnO films to extend melon shelf life, with antimicrobial efficacy strongly influenced by nanoparticle morphology.eng
dc.identifier.doi10.1016/j.foodcont.2026.112219
dc.identifier.otherb79da9a6-9605-4845-a2b4-b66eb2e301f5
dc.identifier.urihttp://hdl.handle.net/10400.14/57551
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier B.V.
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectZinc oxide nanoparticleseng
dc.subjectActive food packagingeng
dc.subjectShelf life extensioneng
dc.subjectFresh-cut meloneng
dc.subjectZinc migrationeng
dc.subjectNanocellulose filmseng
dc.subjectBio-based materialseng
dc.titleActive bio-based packaging for fresh-cut melon: antimicrobial efficacy and zinc migration of nanocellulose/ZnO nanocomposite films
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.volume188
oaire.versionhttp://purl.org/coar/version/c_ab4af688f83e57aa

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