Elaboração e caracterização de filmes biodegradáveis a partir do amido do arroz vermelho.

Abstract

This work was developed with the objective of producing a biodegradable film from red rice starch and to evaluate the physical characteristics and biodegradation under specific conditions. Initially, six formulations were prepared with rice starch and sodium alginate added with 20 and 30% glycerol, and biofilms with sodium alginate and glycerol only; Then the formulations were oven dehydrated at 30ºC for 24 hours. Biofilms were evaluated according to a subjective analysis of continuity, homogeneity and manageability; characterized by physical parameters of thickness, weight, color and biodegradation was also evaluated. From the analysis of the determined parameters it was observed that the films presented a good continuity and excellent maneuverability. The thickness of films made with sodium alginate only had the lowest value when compared to the other formulations. In the luminosity parameter, the addition of starch influenced the opacity of the biofilms, besides a slight tendency to red color. In the biodegradability test it was possible to slowly notice the decomposition of the biofilms.