BIOFILMES À BASE DE AMIDO INCORPORADOS COM EXTRATO ETANÓLICO DE PRÓPOLIS

Abstract

Considering the current trends in the development of biodegradable films and materials that interact with food packaging through the incorporation of active substances within the packaging material it was evaluated the possibility of using propolis as a natural bioactive compound in order to propose a bioactive packaging development technology, elaborated with cassava starch, that has antioxidant effect for food. Cassava starch films were produced and incorporated with ethanolic propolis extract (EEP) at the concentrations of 0, 30 and 60g 100g-1 of starch. The chemical profile, antioxidant and antimicrobial activity of the EEP were evaluated. The effect of the incorporation of EEP on the mechanical properties of the film, as well as the microstructure, the concentration of phenolic compounds and antioxidant activity in the biopolymer matrix 4 were evaluated. The bacterial and bacteriostatic antimicrobial and bacteriostatic activity against S. aureus (Gram-positive) and E. coli (Gram-negative) showed that the Grampositive microorganism was more susceptible to EEP. The analysis of the chemical profile revealed the presence of artepelin C (about 10.957 mg mL -1 EEP) in great quantity. The incorporation of EEP to films improved flexibility and extensibility, made them more homogeneous and less harsh. They also revealed that the polymer matrix had phenolic compounds and antioxidant activity. The tests carried out on the films revealed the potential to be used as active food packaging, helping to reduce the amount of synthetic antioxidants used for food preservation.