OBTAINING AND CHARACTERIZATION OF NANOCOMPOSITE: SILVER NANOPARTICLES AND CARBOXIMETHYLQUITOSAN (NPsAg-CMQ)

• Autores: Zea Álvarez, Julia Lilians, Talavera Núñez, María Elena, Arenas Chávez, Carlos, Pacheco Salazar, David, Osorio Anaya, Ana María, Vera Gonzales, Corina
• Formato: artículo
• Fecha de Publicación: 2019
• Institución: Sociedad Química del Perú
• Repositorio: Revista de la Sociedad Química del Perú
• Lenguaje: español
• OAI Identifier: oai:rsqp.revistas.sqperu.org.pe:article/232
• Enlace del recurso: http://revistas.sqperu.org.pe/index.php/revistasqperu/article/view/232
• Nivel de acceso: acceso abierto
• Materia: Carboxymethylchitosan; silver nanoparticles; nanocomposite; O-carboximetilquitosano; nanopartículas de plata; nanocomposito

The synthesis of the nanocomposite based on silver nanoparticles and O-carboxymethyl chitosan (NPsAg-CMQ), by the chemical reduction method, using the O-carboxymethylchitosan 0.01% and AgNO3 1 mM in a ratio of 3: 2, with a time of 30 minute reaction, at room temperature and neutral pH. The nanocomposite obtained from the complex [Ag(NH3)2]+ was synthesized under the same conditions as AgNO3 but at a basic pH. Using UV-VIS spectrophotometry, the plasmon formation of silver nanoparticles at 410nm was verified for both silver sources. The results by Dynamic Light Dispersion (DLS) for AgNO3, shows a monodisperse distribution of the nanocomposite with an average hydrodynamic size of 166.7 nm. In the case of the diamine silver [Ag(NH3)2] + 83.9% had an average size of 54.42 nm. and 15.2% of 4.48 nm. Infrared Spectroscopy Measurements with Fourier Transform (FT-IR) shows the inhibition of the spectral bands at 879 and 723 cm-1 indicating the presence of NPsAg in the nanocomposite NPsAg-CMQ. The results of scanning electron microscopy (SEM-STEM) showed that the silver nanoparticles in the nanocomposite were spherical in shape and of a size of 5 to 20 nm.