Excellent dye fixation on cotton dyed in supercritical carbon dioxide using fluorotriazine reactive dyes

M. V. Fernandez Cid*, J. Van Spronsen, M. Van Der Kraan, W. J.T. Veugelers, G. F. Woerlee, G. J. Witkamp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Development of a water-free dyeing process for cotton is essential for the textile industry due to ecological and economical reasons. In this study, a dyeing method is described where cotton has been effectively dyed in supercritical carbon dioxide (scCO2). Excellent dye fixation of 100%, and colour strength (K/S) values up to 30, were achieved in a small batch reactor and in a scale-up vessel. A series of non-polar reactive dyes with fluorotriazine as reactive group were synthesised at our laboratory. Fluorotriazines were found to be the best dyes for dyeing cotton and their reaction with cotton was improved by adding small quantities of acids to the reaction medium. H3PO4 and HAc were tested at different concentrations on cotton dyed with fluorotriazines. Evenly dyed pieces of cotton without any damage to the cotton fibres were observed in all experiments. An important step forward has been made for the future commercialization of a green process for industrially dying cotton in scCO2. Elimination of water and its costly treatment can be now achieved in the cotton dyeing process.

Original languageEnglish (US)
Pages (from-to)609-616
Number of pages8
JournalGreen Chemistry
Volume7
Issue number8
DOIs
StatePublished - Aug 1 2005
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution

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