Films based on biopolymers can be used in the manufacture of active packaging, that beyond protecting the packaged food, it can interact with the product. Thus, films with antioxidants activity can be produced by adding a compound with this substance. One alternative to improve some characteristics of films based on biopolymers is by employing aqueous plant extracts which are rich in polyphenols, as boldo-do-Chile (Peumus boldus). Therefore, the general goal of this project is the development of films based on collagen or gelatin added with boldo extract, with physical and functional properties for its use as bioactive packaging. In this project, the characterization (total phenolic content, ABTS, DPPH, chemical composition and minimal inhibitory concentration) of boldo aqueous extract, prepared in three different temperatures will be done. Afterwards, the extract will be added to the collagen or gelatin film forming solutions and it the rheological and thermal properties of these solutions will be evaluated. Then, the films prepared by spreading will be characterized to determinate their mechanical properties (tensile and puncture), solubility, moisture, WVP, optical properties (gloss, color and opacity), sorption isotherms, phase transitions, microstructure (SEM and AFM), crystalinity degree, hydrophobicity, polyphenol concentration and minimal inhibitory concentration. In the end of this study, it is expected the generation of a biodegradable material appropriated to be used as bioactive packaging.
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