4.5 Article

Plasma-induced Decolorization of Indigo-dyed Denim Fabrics Related to Mechanical Properties and Fiber Surface Morphology

Journal

TEXTILE RESEARCH JOURNAL
Volume 79, Issue 6, Pages 558-565

Publisher

SAGE PUBLICATIONS LTD
DOI: 10.1177/0040517508095612

Keywords

denim; decolorization; corona; low pressure RF plasma

Funding

  1. Ministry, of Science of the Republic of Serbia [E !3654]
  2. Euroenviron Biopols
  3. Euroenviron Biopols [141025]

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The aim of this study was to investigate how morphology of fibers is affected by plasma during the process of decolorization by a low-pressure RF plasma (gas, treatment time, and power were varied) and atmospheric pressure industrial corona (number of passages and power). CIE LAB colorimetric system was used for determination of color difference between untreated and differently plasma-treated denim fabrics. Particular emphasis was put on the morphological changes induced by plasma treatment, because they indicate changes in mechanical properties of the fabrics. The morphology of plasma-treated fibers was analyzed by scanning electron microscopy (SEM). SEM images revealed that, when plasma conditions that lead to a decolorization were chosen, specific fiber surface changes were always observed in the form of submicrometer-sized striations, pits, and cracks. Mechanical properties of denim fabrics were moderately influenced by treatment conditions. The results indicated that decolorization was highly affected by plasma parameters and desired 'worn look' effects could be designed by adequate control of plasma processing while paying attention to limiting the plasma-induced damage.

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