Properties of gelatin-based films with added ethanol–propolis extract

By R. Bodini, P. Sobral, C. Fávaro-Trindade, R. A. Carvalho. 2013

154 citations recorded by the source corpus.

Abstract Considering the possibility of using propolis as a natural bioactive compound, and the growing interest in active and biodegradable packaging materials, gelatin-based films plasticized with sorbitol and added of ethanol–propolis extract (EPE) were produced. Four different concentrations of EPE (0, 5, 40 or 200 g/100 g of gelatin) were analyzed. The effect of concentrations of EPE were evaluated on: mechanical properties, solubility, moisture content, water vapor permeability, scanning electron microscopy and infrared spectroscopy characteristics, stability of polyphenol concentrations, and antimicrobial activity against Staphylococcus aureus . EPE incorporation to the films promoted reduction in rupture tension and water vapor permeability, besides other microstructural changes, when compared with the control films (0 g of EPE/100 g of gelatin). Activity against S. aureus was observed in films with 40 and 200 g of EPE/100 g of gelatin. These films kept their antimicrobial activity and polyphenol concentration for 177 days of storage.

Subfields: Food Science, Insect Science

View Paper: https://www.semanticscholar.org/paper/571100bf7f5fd40412c2b90d17e86416781966db