Solvent-assisted salt-free reactive dyeing of cotton fabric

Aravin Prince Periyasamy, Shubhajit Dutta, Ali R. Tehrani-Bagha*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The objective of this study was to establish a solvent-assisted salt-free dyeing method for cotton fabric utilizing commercially available reactive dyes. In this study, the feasibility of substituting water as the dyeing medium with environmentally friendly solvents, specifically ethanol (EtOH), isopropyl alcohol (IPA), and propanol (PrOH), was investigated. Eight commercial reactive dyes, each possessing distinct chemical structures, were examined with various dyeing characteristics including exhaustion, fixation, and fastness properties, in the presence of various alcohols. However, solvent-assisted dyeing exhibited comparable or enhanced color strength (K/S) values, exhaustion, and fixation rates compared to conventional aqueous dyeing. For instance, the RR35 dye demonstrated a substantial increase in K/S values with PrOH, EtOH, and IPA, ranging from 115 to 369% improvement. The substitution of alcohol for water did not affect the wash, rub, and light-color fastness properties, as these properties remained consistently excellent. Solvent-assisted salt-free dyeing of cotton fabrics offers a promising solution to address the environmental impacts of traditional water-based dyeing methods by eliminating the requirement for water and salt. Overall, this study presents a solvent-assisted salt-free dyeing technique and contributes to the field by offering detailed insights into its mechanisms and performance. Our research has the potential to reduce water consumption, eliminate salt usage, and mitigate environmental pollution.

Original languageEnglish
Pages (from-to)7101-7118
Number of pages18
JournalCellulose
Volume31
Issue number11
DOIs
Publication statusPublished - Jul 2024
MoE publication typeA1 Journal article-refereed

Keywords

  • Alcohols
  • Cellulose coloration
  • Color strength
  • Reactive dyes
  • Salt-free
  • Solvent-assisted dyeing

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  • -: FFColor/Tehrani

    Tehrani, A. (Principal investigator), Periyasamy, A. P. (Project Member), Solanki, U. (Project Member), Haddad Momeni, M. (Project Member) & Dutta, S. (Project Member)

    01/02/202131/05/2023

    Project: Business Finland: Other research funding

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