Novel sustainable synthesis of dyes for clean dyeing of wool and cotton fibres in supercritical carbon dioxide

JOURNAL OF CLEANER PRODUCTION

卷:199

Article

Luo, Xujun¹  White, Jonathan¹  Thompson, Richard¹  Rayner, Christopher²  Kulik, Balazs²  Kazlauciunas, Algy¹  He, Weidong³  Lin, Long¹ 

[1] Univ Leeds, Sch Chem, Dept Colour Sci, Leeds LS2 9JT, W Yorkshire, England

[2] Univ Leeds, Sch Chem, Leeds LS2 9JT, W Yorkshire, England

[3] Univ Leeds, Ctr Ind Collaborat, Leeds LS2 9JT, W Yorkshire, England

关键词: Supercritical carbon dioxide;    Dyeing;    Vinyl sulphone;    Wool;    Cotton;    Effluent-free;   

DOI  :  10.1016/j.jclepro.2018.07.158

来源: Elsevier

【 摘 要 】

A new synthetic route was developed to create an azo-based reactive disperse dye containing the vinyl sulphonyl reactive group. This dye was used to colour wool and cotton fibres using scCO(2) as the dyeing medium. The optimum dyeing process was carried out with water pre-treatment at 90 degrees C and 140 bar during a 60 min dyeing time. Under optimal conditions, which are relatively moderate for supercritical dyeing processes, the dyed wool fabrics produced uniform dyeings with high colour strength and fastness properties. These wool dyeings provided good colour strength and fixation properties (fixation of 99.4%). Cotton also showed good colour strength results. Crucially, the process did not produce any dyeing effluent. Furthermore, there is a potential to modify a wide scope of disperse dyes using the thiol group via this synthetic method without the need for further purification. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

Free