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

Authors

  • Dragan Jocic,

    Corresponding author
    1. Department of Chemical Engineering, Universidad Politécnica de Catalunya, c/Colon, 1, 08222 Terrassa, Spain
    • Department of Chemical Engineering, Universidad Politécnica de Catalunya, c/Colon, 1, 08222 Terrassa, Spain
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  • Susana Vílchez,

    1. Departamento de Tecnología de Tensioactivos, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas, c/Jordi Girona, 18-26, 08034 Barcelona, Spain
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  • Tatjana Topalovic,

    1. Textile Engineering Department, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia and Montenegro
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  • Ricardo Molina,

    1. Departamento de Tecnología de Tensioactivos, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas, c/Jordi Girona, 18-26, 08034 Barcelona, Spain
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  • Antonio Navarro,

    1. Department of Chemical Engineering, Universidad Politécnica de Catalunya, c/Colon, 1, 08222 Terrassa, Spain
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  • Petar Jovancic,

    1. Textile Engineering Department, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia and Montenegro
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  • Maria Rosa Julià,

    1. Departamento de Tecnología de Tensioactivos, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas, c/Jordi Girona, 18-26, 08034 Barcelona, Spain
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  • Pilar Erra

    1. Departamento de Tecnología de Tensioactivos, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas, c/Jordi Girona, 18-26, 08034 Barcelona, Spain
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Abstract

This 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 100°C) 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. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 2204–2214, 2005

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