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Title: Preparation and antimicrobial activity of polyethylene composite films with silver exchanged zeolite-Y
Authors: Boschetto, Daiane Lúcia
Lerin, Lindomar
Cansian, Rogério
Pergher, Sibele Berenice Castellã
Luccio, Marco Di
Keywords: Zeolite;Silver;Antimicrobial packaging;Active packaging;Polymer film
Issue Date: 15-Sep-2012
Publisher: Elsevier
Citation: BOSCHETTO, Daiane Lúcia; LERIN, Lindomar; CANSIAN, Rogério; PERGHER, Sibele Berenice Castellã; LUCCIO, Marco di. Preparation and antimicrobial activity of polyethylene composite films with silver exchanged zeolite-Y. Chemical Engineering Journal, [s. l.], v. 204-206, p. 210-216, set. 2012. ISSN 1385-8947. DOI Disponível em:!. Acesso em: 08 jun. 2020.
Portuguese Abstract: This study aimed at the preparation of antimicrobial films based on silver (Ag) exchanged zeolite Y. The zeolite was exchanged to a final concentration of 5% silver and was characterized by different methods. The inclusion of silver in the zeolite did not change its structure. The antimicrobial activity of the Ag-exchanged zeolite was assessed on Escherichia coli, by the minimum inhibitory concentration method (MIC). The zeolite with 5% Ag showed effective antimicrobial activity. The MIC was 0.5 mg zeolite/mL, which corresponds to 25 μg Ag/mL. The leaching of Ag ions to the medium was assessed by AAS, which showed that 56% of the silver ions was leached from the zeolite to the medium. The polyethylene films with the Ag–zeolite were prepared by the methods of wet-casting and thermal pressing of polyethylene beads mixed with Ag–zeolite, varying the zeolite content from 1 to 10 wt%. The inclusion of the Ag–zeolite in the film did not change the film thermal degradation. The films that showed antimicrobial activity on E. coli were those prepared with 5% zeolite containing 5% silver, showing the potential application of such films in food preservation and safety.
ISSN: 1385-8947
Appears in Collections:IQ - Artigos publicados em periódicos

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