Obtención de películas activas con adición de extractos de limón

Abstract

Abstract: In the present work, active biofilms based on chitosan, starch and PVA were obtained by adding lemon extracts obtained through maceration and pressurized liquid extraction processes. For this, the yield of the extracts obtained by each method was analyzed, in addition the content of total phenols and antioxidant activity were evaluated. It should be noted that a purification of the extracts was carried out in order to improve the antioxidant capacity and apply them in the formulation of the biofilms, which affected their performance (1.22%). Different physical, mechanical and biodegradable parameters of the biofilms were measured, which were analyzed taking into account the type of extract added in the formulation. It was observed that the films with the lemon extract had a yellowish color, presented good barrier properties against UV light (0.51% - 0.38%) and VIS (94% - 87%). The addition of lemon extracts to the film formulation improved the % elongation of ELM and ELP films (57.12% - 47.06%) and affected the tensile strength of ELM and ELP (4.38 -2.28Mpa) respectively. In addition to the solubility in which values of 55.95% and 60.93% were obtained for ELM and ELP, respectively. Finally, in the biodegradability, it was qualitatively analyzed how with the passing of days the film came to completely disintegrate.