Immobilization of green tea extract on polypropylene films to control the antioxidant activity in food packaging
In this work, we report the successful immobilization of green tea extract, as a natural antioxidant, on polypropylene through the incorporation of anhydride maleic grafted polypropylene on polymer formulation owing to control active compound release and prolong antioxidant activity. The extruded fi...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2013 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/376866 |
| Acesso em linha: | http://hdl.handle.net/10261/376866 https://api.elsevier.com/content/abstract/scopus_id/84879484055 |
| Access Level: | acceso abierto |
| Palavra-chave: | Catechins Controlled release packaging Green tea extract Maleic anhydride modified polypropylene Natural antioxidants catechin active packaging antioxidants |
| Resumo: | In this work, we report the successful immobilization of green tea extract, as a natural antioxidant, on polypropylene through the incorporation of anhydride maleic grafted polypropylene on polymer formulation owing to control active compound release and prolong antioxidant activity. The extruded films were thermally characterized showing that the incorporation of green tea extract improved polymer stability, and the presence of grafted polymer did not affect polymer morphology. Green tea components release profiles depending on the type of food and polymer formulation. The use of grafted polypropylene changed the ability of the polymer to release green tea antioxidants; the amount of components released decreased with an increasing degree of grafted polypropylene. Materials were submitted to sterilization and microwave heating conditions. The immobilization of the active compounds implied a lower release during these typical food package treatments, and the available antioxidant components on the modified materials presented a good correlation with the antiradical activity toward ABTS+ radicals, prolonging their antioxidant ability. © 2013. |
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