Natamycin based sol-gel antimicrobial coatings on polylactic acid films for food packaging.
Food Chem
; 165: 342-7, 2014 Dec 15.
Article
em En
| MEDLINE
| ID: mdl-25038685
ABSTRACT
In this work a comprehensive study on a new active packaging obtained by a hybrid organic-inorganic coating with antimicrobial properties was carried out. The packaging system based on polylactic acid was realised by sol-gel processing, employing tetraethoxysilane as a precursor of the inorganic phase and polyvinyl alcohol as the organic component, and incorporating natamycin as the active agent. Films with different organic-inorganic ratios (in a range between 119 and 14) were prepared, and the amount of antimycotic entrapped was found to be modulated by the sol composition, and was between 0.18 and 0.25mg/dm(2). FTIR microspectroscopic measurements were used to characterise the prepared coatings. The antifungal properties of the films were investigated against mould growth on the surface of commercial semi-soft cheese. The release of natamycin from the films to ethanol 50% (v/v) was studied by means of HPLC UV-DAD. The maximal level released was about 0.105 mg/dm(2), which is far below the value allowed by legislation.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Polímeros
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Natamicina
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Embalagem de Alimentos
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Ácido Láctico
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Anti-Infecciosos
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Antifúngicos
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article