Influence of enzymatic pretreatment on the colours of bleached and dyed flax fibres

Darinka Fakin*, Vera Golob, Karin Stana Kleinschek

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

In this paper the effect of enzymatic bioscouring on the bleaching and dyeing of flax fibres was studied in comparison with conventional alkaline scouring. Enzymatic bioscouring was performed with a commercial multi-enzyme system consisting of pectinases, hemicellulases and cellulases. The enzyme and alkaline scoured flax fibres were subsequently oxidatively bleached with hydrogen peroxide and dyed with direct dye C.I. Direct Red 80 under the same conditions. The efficiency of both the scouring and bleaching processes was evaluated by weight loss and the whiteness of the bleached samples was determined according to CIE formula. The exhaustion profile of the used dye was followed on-line during the dyeing process using absorbance measurement. The colours of bleached and dyed samples were evaluated using CIELAB colour values. The residual pretreatment and dyeing baths were ecologically analysed with COD, TOC and BOD5. The obtained results indicate that enzymatic scouring provides a lower weight loss, a higher degree of whiteness, comparable dyeing properties and is more environmentally friendly.

Original languageEnglish
Pages (from-to)69-81
Number of pages13
JournalJournal of natural fibers
Volume3
Issue number2-3
DOIs
Publication statusPublished - 8 Aug 2006
Externally publishedYes

Keywords

  • Alkaline scouring
  • Bleaching
  • Colorimetry
  • Dyeing
  • Ecology
  • Enzyme pretreatment
  • Flax fibres

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

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