Elaboração de filmes compósitos à base de gelatina e bentonita para a aplicação em embalagens ativas para alimentos

Abstract

Active packages are the advancement of the food industry, as they present various characteristics higher than traditional ones, such as increasing food shelf time, sensory improvements and greater safety against contaminants, in addition, may have biodegradability because they are produced from materials Natural and renewable furnishings. This study aimed to produce bioopolymers of gelatin and bentonite clay for use in active packaging of food. Experimental planning used the box-behnken type design for formulation of films, which were characterized as to the thickness, moisture content, water absorption capacity and water solubility. For the analysis of the results was applied the statistic test ANOVA, considering p <0.1. The results of moisture tests (33.77–91.01%), water absorption capacity (80,29–178.89%) and solubility (63.02–94.19%) were satisfactory according to the literature, but the thickness did not present values with statistical significance. Thus, the simultaneous optimization of significant results generated a film formulation based on gelatin and bentonite of 15% gelatin (m/v), 18.7% glycerol (v/v) and 7.5% bentonite clay (m/m; calculated by the mass of gelatin) as ideal for application as active food packaging. These results contribute to future biopolymers related to gelatin and clays based on this application, requiring complementary analyzes for the characterization of mechanical and thermal properties, in addition to the validation of the optimization process.