| Texto completo | |
| Autor(es): |
da Silva, Mariana Altenhofen
[1]
;
Krause Bierhalz, Andrea Cristiane
[1]
;
Kieckbusch, Theo Guenter
[1]
Número total de Autores: 3
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Campinas, Sch Chem Engn, BR-13083852 Campinas, SP - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY; v. 47, n. 4, p. 740-746, APR 2012. |
| Citações Web of Science: | 16 |
| Resumo | |
In antimicrobial active films, the active agent is incorporated in the polymeric matrix and is released from the film to the product surface where most deterioration processes take place. In this study, films structured solely by alginate and by blends of alginate:chitosan (82.5:17.5 and 65:35) were obtained by casting. The film formulations received natamycin (4 and 8 g/100 g biopolymer) as antimicrobial agent. Films were characterised according to their thickness and morphology. Diffusion experiments in water indicated very slow release kinetics of the antimicrobial, being markedly hindered in the alginate and chitosan composite films, probably due to electrostatic interactions between chitosan and natamycin. Fickian diffusion prevailed and the diffusion coefficients found for the films varied from 2.6 x 10-11 to 2.5 x 10-12 cm2 s-1. (AU) | |
| Processo FAPESP: | 05/55499-3 - Confecção e caracterização de filmes ativos biodegradáveis compostos de alginato de sódio, pectina e quitosana contendo agentes antimicrobianos |
| Beneficiário: | Theo Guenter Kieckbusch |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |