Antimicrobial evaluation of gelatin–based films incorporated with chitosan in the conservation of fish fillets / Avaliação antimicrobiana de filmes à base de gelatina incorporados com quitosano na conservação de filtes de peixe

Fernanda Saraiva Gomes Brazeiro, Camila Ramão Contessa, Luciano dos Santos Almeida, Jaqueline Motta de Moura, Caroline Costa Moraes, Catarina Motta De Moura

Abstract


Materials obtained from biodegradable polymers can be an alternative to reduce the environmental impact caused by petroleum–derived polymers. Materials of different origins have been considered as a raw material with technical and economic feasibility for the development of packaging films. However, it is required that these alternative materials, in addition to being biodegradable, have beneficial properties in food preservation. In this context, biodegradable films based on fish gelatin, and fish gelatin with chitosan incorporation, were prepared and characterized in terms of their mechanical properties (tensile strength (TS) and elongation (E)), permeation (WVP), and antimicrobial activity in the conservation of tilapia fillets (Tilapia rendalli). Regarding the mechanical and permeation properties, the results showed that the incorporation of chitosan to the gelatin films promotes an increase in TS and E, and a reduction in WVP. As for the antimicrobial property in the conservation of tilapia fillets, both films showed satisfactory activity against the pathogenic microorganism Staphylococcus aureus. These results indicate that fish gelatin–based films with chitosan incorporation are promising as active packaging in the conservation of fish fillets.


Keywords


biodegradable films, active packaging, Staphylococcus aureus.

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References


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DOI: https://doi.org/10.34117/bjdv6n11-249

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