TY - JOUR
T1 - Hydrolysis-free and fully recyclable reactive dyeing of cotton in green, non-nucleophilic solvents for a sustainable textile industry
AU - Chen, Luyi
AU - Wang, Bijia
AU - Ruan, Xinhui
AU - Chen, Jiangang
AU - Yang, Yiqi
N1 - Funding Information:
This work was supported by the Chinese National High Technology Research and the Development Program 863 Project ( 2013AA06A307 ); the Chinese National Higher-Education Institution General Research and Development Project of Donghua University ( 2232013D3-23 ); the Innovation Foundation for PhD Candidate of Donghua University ( CUSF-DH-D-2013044 ); and the USDA Hatch Act Multi-State Project S-1054 ( NEB 37-037 ) at the University of Nebraska-Lincoln.
Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/11/16
Y1 - 2015/11/16
N2 - A preventive approach to reduce the environmental burden associated with textile processing was demonstrated by creating a fully recyclable reactive dyeing process for cotton. Reactive dyeing is the most commonly used coloration method for cotton, yet it generates the most problematic effluents that are not only difficult to treat but also non-reusable. Dye hydrolysis, the major barrier to reusing spent reactive dye baths was eliminated in the current study by replacing water with non-nucleophilic green solvents as the processing media. Dye sorption and dye fixation as affected by solvent composition and type of bases were investigated. Compared with conventional aqueous dyeing, the solvent-based process required up to 40% less dye, 97.5% less base, and no inorganic salts. Recycling of all spent baths throughout the process was demonstrated with a 10-cycle repeated dyeing sequence, which displayed consistently high shade build-up and colorfastness. Based on the 10-cycle sequence, the reduction in waste disposal was estimated to be over 99% for both organics and salts. Five different monochlorotriazine dyes featuring different chromophores were successfully applied to cotton using the solvent-based dyeing method. The favorable results implied that discharge-free reactive dyeing could be possible. The solvent dyeing process has significant potential for requiring no modifications of dyes or fabrics and no pressurization. By implementing the principles of reducing waste, reusing, and recycling resources (3Rs), the solvent-based process developed in this study could be a solid step towards sustainable textile processing.
AB - A preventive approach to reduce the environmental burden associated with textile processing was demonstrated by creating a fully recyclable reactive dyeing process for cotton. Reactive dyeing is the most commonly used coloration method for cotton, yet it generates the most problematic effluents that are not only difficult to treat but also non-reusable. Dye hydrolysis, the major barrier to reusing spent reactive dye baths was eliminated in the current study by replacing water with non-nucleophilic green solvents as the processing media. Dye sorption and dye fixation as affected by solvent composition and type of bases were investigated. Compared with conventional aqueous dyeing, the solvent-based process required up to 40% less dye, 97.5% less base, and no inorganic salts. Recycling of all spent baths throughout the process was demonstrated with a 10-cycle repeated dyeing sequence, which displayed consistently high shade build-up and colorfastness. Based on the 10-cycle sequence, the reduction in waste disposal was estimated to be over 99% for both organics and salts. Five different monochlorotriazine dyes featuring different chromophores were successfully applied to cotton using the solvent-based dyeing method. The favorable results implied that discharge-free reactive dyeing could be possible. The solvent dyeing process has significant potential for requiring no modifications of dyes or fabrics and no pressurization. By implementing the principles of reducing waste, reusing, and recycling resources (3Rs), the solvent-based process developed in this study could be a solid step towards sustainable textile processing.
KW - Cotton fabrics
KW - Hydrolysis free
KW - Non-nucleophilic solvent
KW - Reactive dyeing
KW - Recyclable
KW - Sustainable textile industry
UR - http://www.scopus.com/inward/record.url?scp=84942991381&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84942991381&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2015.05.144
DO - 10.1016/j.jclepro.2015.05.144
M3 - Article
AN - SCOPUS:84942991381
SN - 0959-6526
VL - 107
SP - 550
EP - 556
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
ER -