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Título

Chitosan/acid dye interactions in wool dyeing system

AutorJocic, Dragan; Vílchez, Susana; Topalovic, Tatjana; Navarro, Antonio; Jovancic, Petar; Julià, María Rosa; Erra Serrabasa, Pilar
Palabras claveAcid dye
Chitosan
Interaction
Spectrophotometry
Dyeing
Fecha de publicación7-abr-2005
EditorElsevier
CitaciónCarbohydrate Polymers 60(1): 51-59 (2005)
ResumenThis study assesses the interactions that could occur during dyeing of the chitosan treated wool fibres on basis of the spectrophotometric study, by measuring the absorbance values of the solutions containing dye and chitosan. It has been shown that there is a 1:1 stoichiometry between protonated amino groups and sulfonate acid groups on the dye ions in low concentrated chitosan solutions. This interaction forms an insoluble chitosan/dye product. With the excess of chitosan in the solution, the dye can be distributed between the different chitosan molecules and the soluble chitosan/dye products remain in the solution. The mechanism of the interaction is suggested, that involves the possibility of adsorbed dye molecules to be desorbed and redistributed between other components present in the system, depending on system parameters (pH, temperature and electrolyte presence). This fact is important in explanation of dyeing behaviour of chitosan treated wool and enables the assessment of the mechanism of dyeing of accordingly modified textile fibres.
Descripción9 pages, 4 figures, 3 tables.-- Available online Dec 18, 2004.
Versión del editorhttp://dx.doi.org/10.1016/j.carbpol.2004.11.021
URIhttp://hdl.handle.net/10261/16034
DOI10.1016/j.carbpol.2004.11.021
ISSN0144-8617
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