Dépôt numérique

Characterization of Trilayer Antimicrobial Diffusion Films (ADFs) Based on Methylcellulose-Polycaprolactone Composites

Boumail, Afia; Salmieri, Stéphane; Klimas, Émilie; Tawema, Pamphile O.; Bouchard, Jean; Lacroix, Monique (2013). Characterization of Trilayer Antimicrobial Diffusion Films (ADFs) Based on Methylcellulose-Polycaprolactone Composites Journal of Agricultural and Food Chemistry , vol. 61 , nº 4. p. 811-821. DOI: 10.1021/jf304439s.

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Novel trilayer antimicrobial diffusion films (ADFs) were developed for food applications. ADFs were composed of two external layers of polycaprolactone and one internal layer of nanocryst. cellulose (NCC)-reinforced methylcellulose (MC) matrix. Two antimicrobial mixts. (formulations A and B) were incorporated in the MC layer and compared via the evaluation of film properties. Resulting ADFs were inserted as diffusion devices into vegetable packages, and samples were stored at 4 °C for 14 days. Microbiol. diffusion assays in the presence of ADFs were performed on pathogenic bacteria. From this, the study focused on characterizing the structural, physicochem. properties and total phenols (TP) release from ADFs. This TP release was detd. by Folin-Ciocalteu's method and by FTIR anal. Results indicated a controlled release of antimicrobials into the headspace (16.5% for formulation A and 13.4% for formulation B). Good correlations (≥90%) between both methods allowed validating an innovative, accurate, rapid FTIR procedure to quantify the diffusion of TP. SEM micrographs showed fibrillar structure due to NCC and a more compact network due to antimicrobials. Encapsulated antimicrobial formulations induced color changes without affecting visual attributes of films. ADFs contg. formulation B exhibited the highest tensile strength (17.3 MPa) over storage. [on SciFinder(R)]

Type de document: Article
Mots-clés libres: antimicrobial film; diffusion; methylcellulose; polycaprolactone; nanocrystalline cellulose; composite
Centre: Centre INRS-Institut Armand Frappier
Date de dépôt: 19 juin 2017 19:53
Dernière modification: 19 juin 2017 20:41
URI: http://espace.inrs.ca/id/eprint/2865

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