Physical properties and antimicrobial activity of mango starch active films reinforced with biosynthesized silver nanoparticles

Abstract

The following research aims to improve the properties of biodegradable active films based on mango seed starch by incorporating biosynthesized silver nanoparticles. Silver nanoparticles were manufactured by green route from grape residues and were added in the film gelatinization process at concentrations of 3% and 6% v/v and compared with control films (0%). The silver nanoparticles were characterized by UV-Vis spectroscopy and DLS analysis to determine the size distribution profile. Films morphology was analyzed by SEM and the integration of silver nanoparticles in biodegradable films was confirmed by EDS analysis. Thermic stability was studied by TGA curves, mechanical properties and antibacterial activity were also studied. The increase in the percentage of silver nanoparticles produces an improvement in its mechanical properties, also, TGA analysis shows an improvement on thermal stability attributed to the good integration of the nanoparticles in the polymeric matrix. Furthermore, films exhibited antimicrobial activity against E. coli and S. aureus bacteria and C. albicans fungi.