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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
19/01/2024 |
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Data da última atualização: |
11/06/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BRITO, S. C.; PEREIRA, V. A. C.; PRADO, A. C. F.; TOBIAS, T. J.; PARIS, E. C.; FERREIRA, M. D. |
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Afiliação: |
SABRINA DA COSTA BRITO, SAO PAULO STATE UNIVERSITY; VINICIUS ALEX CANO PEREIRA, FEDERAL UNIVERSITY OF SAO CARLOS (UFSCAR); ANA CAROLINA FIGUEIREDO PRADO, FEDERAL UNIVERSITY OF SAO CARLOS (UFSCAR); THAIS JULIANA TOBIAS, UNIVERSITY OF SAO PAULO (USP); ELAINE CRISTINA PARIS, CNPDIA; MARCOS DAVID FERREIRA, CNPDIA. |
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Título: |
Antimicrobial potential of linear low-density polyethylene food packaging with Ag nanoparticles in different carriers (Silica and Hydroxyapatite). |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Journal of Microbiological Methods, v. 217–218. 106873, 2024. |
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ISSN: |
0167-7012 |
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DOI: |
https://doi.org/10.1016/j.mimet.2023.106873 |
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Idioma: |
Inglês |
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Conteúdo: |
Silver nanoparticles incorporation into polymeric packaging aims to prevent microbiological contamination in food products, thus ensuring superior food safety and preservation. In this context, this study aimed to verify the antimicrobial efficacy of linear low-density polyethylene (LLDPE) films incorporated with silver nanoparticles (AgNPs) dispersed in silica (SiO2) and hydroxyapatite (HAP) carriers at different concentrations. AgNPs + carriers polymer films were characterized at 0.2, 0.4, and 0.6% concentrations using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission gun-scanning electron microscope (FEG-SEM), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC), and migration in acidic and nonacidic simulants. Antimicrobial action was investigated on Gram-positive Staphylococcus aureus, Gram-negative Escherichia coli, and the Penicillium expansum and Fusarium solani fungi with antimicrobial activity by direct contact test and bacterial imaging by scanning electron microscopy. AgNPs addition to the LLDPE matrix did not interfere with the films’ chemical and thermal properties and presented no significant migration to the external medium. For antimicrobial action, silver nanoparticles showed, in most concentrations, an inhibition percentage higher than 90% on all microorganisms studied, regardless of the carrier. However, a greater inhibitory action on S. aureus and between carriers was found, making hydroxyapatite more effective. The results indicated that nanostructured films with AgNPs + hydroxyapatite showed more promising antimicrobial action on microorganisms than AgNPs + silica, making hydroxyapatite with silver nanoparticle potentially useful in food packaging, improving safety and maintaining quality. MenosSilver nanoparticles incorporation into polymeric packaging aims to prevent microbiological contamination in food products, thus ensuring superior food safety and preservation. In this context, this study aimed to verify the antimicrobial efficacy of linear low-density polyethylene (LLDPE) films incorporated with silver nanoparticles (AgNPs) dispersed in silica (SiO2) and hydroxyapatite (HAP) carriers at different concentrations. AgNPs + carriers polymer films were characterized at 0.2, 0.4, and 0.6% concentrations using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission gun-scanning electron microscope (FEG-SEM), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC), and migration in acidic and nonacidic simulants. Antimicrobial action was investigated on Gram-positive Staphylococcus aureus, Gram-negative Escherichia coli, and the Penicillium expansum and Fusarium solani fungi with antimicrobial activity by direct contact test and bacterial imaging by scanning electron microscopy. AgNPs addition to the LLDPE matrix did not interfere with the films’ chemical and thermal properties and presented no significant migration to the external medium. For antimicrobial action, silver nanoparticles showed, in most concentrations, an inhibition percentage higher than 90% on all microorganisms studied, regardless of the carrier. However, a greater inhibitory action on S. aureus and between carriers was found, making hydroxyapatite... Mostrar Tudo |
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Palavras-Chave: |
Active food packaging; Inorganic carrier; Polymer films; Silver nanoparticles. |
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Categoria do assunto: |
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Marc: |
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Embrapa Instrumentação (CNPDIA) |
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| 14. |  | MAZZOCHI, L.; COCCO, C.; HAWERROTH, F. J. Produtos alternativos na indução de brotação das gemas de macieira cvs. "Imperial Gala" e "Fuji Suprema". In: ENCONTRO NACIONAL DE FRUTICULTURA DE CLIMA TEMPERADO, 15., 2017, Fraiburgo, SC. Anais... (Vol. II). Semeando conhecimento, colhendo qualidade. Vol. II - Resumos. Fraiburgo, SC: Epagri, 25,26 e 27 jul. 2017. p. 124.| Tipo: Resumo em Anais de Congresso |
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