Abstract

ESTUDILLO-DIAZ, Enna B. et al. Development and characterization of active films with silver-nanoparticles obtained by green synthesis. Biotecnia [online]. 2023, vol.25, n.1, pp.109-115.  Epub Aug 07, 2023. ISSN 1665-1456.  https://doi.org/10.18633/biotecnia.v25i1.1683.

The use of edible films is a technology to extend the shelf life of food. The addition of silver nanoparticles (AgNPs) could improve the performance of edible films and avoid the growth of microorganisms that could affect food. The objective was to elaborate and characterize AgNPs by green synthesis and to evaluate the effect of their addition on the mechanical and barrier properties of films formed from Cajanus cajan protein and Tamarindus indica seed gum. An aqueous extract of Annona muricata leaves was used for green synthesis. Three films were developed containing AgNPs, aqueous extract of Annona muricata leaves and water (control). Films were evaluated by their water vapour permeability (WVP), color, opacity and mechanical properties. The AgNPs increased two-fold the Young’s module (0.0675 MPa) and the tensile strength (2.84 MPa) in relation to control film. Moreover, the AgNPs influenced also the color and opacity of the films. However, no differences were observed in the WVP. The addition of AgNPs to films, could be an option to increase the shelf life of foods.

Keywords : Cajanus cajan; tamarind gum; silver nanoparticles.