Síntesis de composites quitosano- hidrolato de romero (Rosmarinus officinalis)-Ag / Cu y su posible actividad antimicrobiana

Abstract

In the present work, the parameters for the extraction and deproteinization of chitosan were established using bees of the species Apis mellifera as raw material. Additionally, cassava starch was extracted and a rosemary hydrolate was prepared that allowed the synthesis of silver and copper nanoparticles. With the previous precursors, the synthesis of starch-based biofilms was carried out, complexed with chitosan extracted from Apis mellifera, rosemary hydrolate, copper nanoparticles, and silver nanoparticles, establishing the most appropriate parameters for their synthesis. It was found that the presence of metallic nanoparticles increases the stability in the decomposition of the material. The biofilms had bacteriostatic behaviour with each of the mentioned components, and their range of effectiveness increased as the 3 components (chitosan, rosemary hydrolate and metal nanoparticles) were mixed; The presence of copper nanoparticles presented greater stability in decomposition and greater antimicrobial effect than silver nanoparticles.