UV-blocking, antibacterial, corrosion resistance, antioxidant, and fruit packaging ability of lignin-rich alkaline black liquor composite film.
Int J Biol Macromol
; 275(Pt 1): 133344, 2024 Aug.
Article
em En
| MEDLINE
| ID: mdl-38914391
ABSTRACT
The novel multifunctional active packaging composite film with antimicrobial, antioxidant, water-vapor and UV-barrier, and corrosion resistance properties was successfully prepared from waste biomass. In this study, waste poplar sawdust was pretreated using green liquor to extract black liquor (BL). BL was then mixed with polyvinyl alcohol (PVA) solution for synthesizing silver nanoparticles (AgNPs). PVA-BL-AgNPs film was fabricated by solution casting method, and the microstructure characterization and macroscopic performance testing of the composite film were conducted. The results revealed that PVA-BL-AgNPs film exhibited inhibitory effects against Staphylococcus aureus (inhibition zone 33.6 mm), Pseudomonas aeruginosa (inhibition zone 31.6 mm), and Escherichia coli (inhibition zone 32.0 mm). It could eliminate over 99 % of 2,2-diazodi (3-ethyl-benzothiazol-6-sulfonic acid) (ABTS) free radicals and provided 100 % UV-blocking, reducing light-induced food damage. It exhibited the improvement of water-vapor barrier properties and corrosion resistance. In vitro cytotoxicity assays demonstrated that no significant impact occurred on cell proliferation, confirming the safety of the film. Packaging experiments showed that PVA-BL-AgNPs film effectively inhibited milk spoilage and prolonged the shelf-life of bread and bananas. Therefore, PVA-BL-AgNPs film might extend the shelf-life of food and offer significant opportunities in addressing the issues of low safety and environmental pollution associated with traditional packaging films.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Prata
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Raios Ultravioleta
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Embalagem de Alimentos
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Nanopartículas Metálicas
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Lignina
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Antibacterianos
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Antioxidantes
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article