IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Determination of the substitution degree of modified chitosan by cyclic voltammetry at the water/dichloroethane interface
Autor/es:
ANA AGUSTINA ALDANA; MIRIAM C. STRUMIA; LIDIA M. YUDI; MARISA MARTINELLI; ANA VALERIA JUAREZ
Revista:
ELECTROCHIMICA ACTA
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 117 p. 534 - 540
ISSN:
0013-4686
Resumen:
tThe electrochemical behavior of the cationic polymer chitosan-gtmac (Ch-GTMAC), at the polarizedwater/1,2-dichloroethane interface was studied. This polymer was obtained by nucleophilic reaction ofchitosan (Ch) with glycidyltrimethylammonium chloride groups (GTMAC). The voltammetric responsewas found to be dependent on the concentration of the polymer, on pH of the aqueous phase, and on thenature of the organic electrolyte. The results suggest a weak adsorption of the polymer coupled to thetransfer towards the organic phase. Desorption process is quasi-reversible, and there is not interactionbetween adsorbents. From the analysis of desorption charge, it was possible to determine the substitutiondegree of the polymer