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Título

Effect of low-temperature plasma and chitosan treatment on wool dyeing with Acid Red 27

AutorJocic, Dragan; Vílchez, Susana; Topalovic, Tatjana; Molina Mansilla, Ricardo; Navarro, Antonio; Jovancic, Petar; Julià, María Rosa; Erra Serrabasa, Pilar
Palabras claveBiopolymers
Cold plasma
Diffusion
Dyes/pigments
Fecha de publicación28-jun-2005
EditorJohn Wiley & Sons
CitaciónJournal of Applied Polymer Science 97(6): 2204-2214 (2005)
ResumenThis study examines in detail the influence of low-temperature plasma and biopolymer chitosan treatments on wool dyeability. Wool knitted fabrics were treated and characterized by whiteness and shrink-resistance measurements. Surface modification was assessed by contact-angle measurements of human hair fibers, which were used as a model to study the wetting properties of the treated wool knitted fabrics. The dyeing behavior was assessed from the diffusion mechanism point of view. The dyeing kinetics were measured at two different pHs (4.2 and 6.5) and three different temperatures (60, 85, and 100ºC) to gain information about the contribution of the surface modification treatment to the dyeing mechanism. The exhaustion and reflectance data were compared, and the apparent diffusion coefficients were calculated. On the basis of the obtained results, a model for the dyeing mechanism of the chitosan treated wool was proposed. When treated with chitosan, the polymer sheath spread on the surface of the fibers acted as a predominant dyeing site in very short dyeing times, thus interacting with the dye and in later stages imparting the dye to the wool fiber.
Descripción11 pages, 8 figures, 4 tables.-- Printed version published Sep 15, 2005.
Versión del editorhttp://dx.doi.org/10.1002/app.21866
URIhttp://hdl.handle.net/10261/16081
DOI10.1002/app.21866
ISSN0021-8995 (Print)
1097-4628 (Online)
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