Natamycin based sol-gel antimicrobial coatings on polylactic acid films for food packaging
| Autor: | Angelo Montenero, Ilaria Alfieri, Antonella Cavazza, Andrea Lorenzi, Claudia Lantano, Claudio Corradini, Nicola Zucchetto |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Antifungal Agents Natamycin Polymers Polyesters Active packaging engineering.material Polyvinyl alcohol Analytical Chemistry chemistry.chemical_compound Polylactic acid Coating Anti-Infective Agents medicine Organic chemistry Polymethyl Methacrylate Lactic Acid Fourier transform infrared spectroscopy Sol-gel Food Packaging General Medicine Food packaging chemistry engineering Food Science medicine.drug Nuclear chemistry |
| Zdroj: | Food chemistry. 165 |
| ISSN: | 1873-7072 |
| Popis: | 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 1:19 and 1:4) were prepared, and the amount of antimycotic entrapped was found to be modulated by the sol composition, and was between 0.18 and 0.25 mg/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. |
| Databáze: | OpenAIRE |
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