title: Physical-mechanical and antimicrobial properties of nanocomposite films with pediocin and ZnO nanoparticles.
abstract: This work aimed to develop nanocomposite films of methyl cellulose (MC) incorporated with pediocin and zinc oxide nanoparticles (nanoZnO) using the central composite design and response surface methodology. This study evaluated film physical-mechanical properties, including crystallography by X-ray diffraction, mechanical resistance, swelling and color properties, microscopy characterization, thermal stability, as well as antimicrobial activity against Staphylococcus aureus and Listeria monocytogenes. NanoZnO and pediocin affected the crystallinity of MC. Load at break and tensile strength at break did not differ among films. NanoZnO and pediocin significantly affected the elongation at break. Pediocin produced yellowish films, but nano ZnO balanced this effect, resulting in a whitish coloration. Nano ZnO exhibited good intercalation in MC and the addition of pediocin in high concentrations resulted crater-like pits in the film surfaces. Swelling of films diminished significantly compared to control. Higher concentrations of Nano ZnO resulted in enhanced thermal stability. Nanocomposite films presented antimicrobial activity against tested microorganisms.
authors.affiliation: Food Technology Department, Federal University of Viçosa, Av. P. H. Rolfs s/n, Campus Universitário, 36570-000 Viçosa, Minas Gerais, Brazil.
authors.forename: Paula Judith Perez
authors.initials: PJ
authors.lastname: Espitia
authors.forename: Nilda de Fátima Ferreira
authors.initials: Nde F
authors.lastname: Soares
authors.forename: Reinaldo F
authors.initials: RF
authors.lastname: Teófilo
authors.forename: Jane Sélia dos Reis
authors.initials: JS
authors.lastname: Coimbra
authors.forename: Débora M
authors.initials: DM
authors.lastname: Vitor
authors.forename: Rejane Andrade
authors.initials: RA
authors.lastname: Batista
authors.forename: Sukarno Olavo
authors.initials: SO
authors.lastname: Ferreira
authors.forename: Nélio José
authors.initials: NJ
authors.lastname: de Andrade
authors.forename: Eber Antonio Alves
authors.initials: EA
authors.lastname: Medeiros
mesh_terms: D000465:Algorithms; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D001430:Bacteriocins / Q000737:chemistry* / Q000494:pharmacology; D052978:Disk Diffusion Antimicrobial Tests; D018857:Food Packaging; D016014:Linear Models; D008089:Listeria monocytogenes / Q000187:drug effects; D008747:Methylcellulose / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D013211:Staphylococcus aureus / Q000187:drug effects; D013499:Surface Properties; D013718:Tensile Strength; D013818:Thermogravimetry; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry* / Q000494:pharmacology
chemical_list: C119555:ALTA 2341; D000900:Anti-Bacterial Agents; D001430:Bacteriocins; D008747:Methylcellulose; D015034:Zinc Oxide