Recyclable reactive dyeing of wool fabrics in environmental friendly non-aqueous medium for a more sustainable textile industry

Luyi Chen, Xinhui Ruan, Jiangang Chen, Suxin Xu, Yiqi Yang, Bijia Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Reactive dyeing of wool fabrics in non-aqueous green solvents was investigated with the aim to cut effluent discharge via dyebath reuse. Hydrolysis of reactive dyes is the major obstacle for recycle and reuse of the spent dye bath. In the current work, 10 non-nucleophilicsolvents were screened based on their Environmental, health, and safety (EHS) profile to be used as the dyeing media. Dimethyl sulfoxide (DMSO) and dimethyl carbonate were chosen for their favorable EHS score. ATR-IR, SEM and XRD analysis had revealed DMSO pretreatment induced appreciable morphological and structural changes wool fabrics, leading to enhanced dyeability. DMC was used in combination with DMSO to facilitate dye adsorption as a poor solvent for the dyes. The effect of dyeing temperatures, dyeing time, and DMC content on final depth of shade was investigated. Covalent fixation and ionic fixation were determined for the solvent-dyed wool fabric using a pyridine-stripping procedure and compared to that of an aqueously-dyed control. The results showed that about 30% higher covalent fixation was achieved in non-aqueous system, which leads to higher depth of shade (ΔK/S = 1.3-4.9), enhanced color build up properties and better colorfastness (0.5-1 grade). A multi-cycle repeated dyeing sequence involving the recovered solvents and dyes was demonstrated to give consistently high shade buildup and colorfastness. The recyclable dyeing procedure developed in the current study provides an alternative to effluent treatment in reduction of pollutant discharge for a more sustainable textile industry.

Original languageEnglish (US)
Title of host publicationWool and Textiles Sustainable Development
EditorsJianzhong Shao, Jiping Wang, Jiping Wang
PublisherTrans Tech Publications Ltd
Pages78-87
Number of pages10
ISBN (Print)9783038355724
DOIs
Publication statusPublished - Jan 1 2015
Event13th International Wool Research Conference, IWRC 2015 and AATCC Sustainability Symposium, AATCC-SS 2015 - Hangzhou, China
Duration: Jun 10 2015Jun 14 2015

Publication series

NameKey Engineering Materials
Volume671
ISSN (Print)1013-9826

Other

Other13th International Wool Research Conference, IWRC 2015 and AATCC Sustainability Symposium, AATCC-SS 2015
CountryChina
CityHangzhou
Period6/10/156/14/15

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Keywords

  • EHS profile
  • Green solvent
  • Non-aqueous
  • Reactive dyeing
  • Recyclable
  • Wool fabrics

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Chen, L., Ruan, X., Chen, J., Xu, S., Yang, Y., & Wang, B. (2015). Recyclable reactive dyeing of wool fabrics in environmental friendly non-aqueous medium for a more sustainable textile industry. In J. Shao, J. Wang, & J. Wang (Eds.), Wool and Textiles Sustainable Development (pp. 78-87). (Key Engineering Materials; Vol. 671). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.671.78