CIFICEN 24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
A study of the structural changes in a chitosan matrix produced by the adsorption of copper and chromium ions
Autor/es:
MACCHI, CARLOS; ANBINDER, PABLO S.; SOMOZA, ALBERTO; AMALVY, JAVIER
Revista:
CARBOHYDRATE POLYMERS
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2019 vol. 222
ISSN:
0144-8617
Resumen:
A study of the structural changes at micro- and nano-scale in a chitosan matrix after the adsorption of different metal ions is presented. Toward this aim, samples of chitosan films soaked in different concentrations of copper(II) and chromium(VI) aqueous solutions were prepared. Cu and Cr ions were selected as sorbates since they have different ionic properties. The effect of the adsorbed metal ions on the microstructure of the chitosan matrices were studied using Fourier transformed infrared spectroscopy, UV?vis spectroscopy, differential scanning calorimetry and thermogravimetric analysis. To go further into the study of the samples at the molecular level, the nuclear technique positron annihilation lifetime spectroscopy was used. Results are discussed in terms of the interaction between the metal ions and the chitosan functional groups.
