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

AuthorsJocic, Dragan; Vílchez, Susana; Topalovic, Tatjana; Molina Mansilla, Ricardo; Navarro, Antonio; Jovancic, Petar; Julià, María Rosa; Erra Serrabasa, Pilar
Cold plasma
Issue Date28-Jun-2005
PublisherJohn Wiley & Sons
CitationJournal of Applied Polymer Science 97(6): 2204-2214 (2005)
AbstractThis 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.
Description11 pages, 8 figures, 4 tables.-- Printed version published Sep 15, 2005.
Publisher version (URL)http://dx.doi.org/10.1002/app.21866
Appears in Collections:(IQAC) Artículos
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