Effect of Solvent Dyeing Medium on Dye Encapsulation and Non-Aqueous Dyeing of Cotton Fabric with Rhamnolipid (RL) Microbial Biosurfactant-Based Reactive Dye Encapsulated Reverse Micelles

• Published in: Fibers and polymers 2023, 24(12), , pp.4323-4335
• Main Authors: Tang, Yiu Lun Alan, Lee, Cheng Hao, Wang, Yanming, Kan, Chi-wai
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Color; Cotton; Cotton fabrics; Dyeing; Dyes; Encapsulation; Fabrics; Heptanes; Microorganisms; Morphology; Octane; Parameter modification; Polymer Sciences; Regular Article; Reverse micelles; Rhamnolipids; Solvents; Surfactants; 섬유공학
• ISSN: 1229-9197; 1875-0052
• DOI: 10.1007/s12221-023-00371-w

Feasibility and applicability of rhamnolipid (RL) microbial biosurfactant-based reverse micellar non-aqueous system in different solvent medium for dyeing of cotton fabrics was investigated. In this study, several solvents, including heptane, octane, nonane, decamethylcyclopentasiloxane (D5), and paraffin liquid (PL), were chosen as the dyeing medium for non-aqueous dyeing of cotton fabrics with fixed dyeing parameters. The dyeing properties of these RL reverse micellar dyed samples in different solvent medium were examined and compared with the conventional water-dyed samples in terms of color yield ( K/S sum value), CIE L * a * b * values, color levelness and reflectance. Most non-aqueous RL reverse micellar dyed samples exhibited better color yield than conventional water-dyed samples. The surface morphology of dyed cotton samples and the dye encapsulation morphology in different solvent medium were observed by SEM and TEM, respectively. Most non-aqueous dyed samples yielded good to excellent levelness comparable to water-dyed samples. However, poor levelness and bad levelness were found for D5-and PL-dyed samples. Further modification of dyeing parameters would be needed to obtain the best dyeing results for D5-dyed and PL-dyed samples. Graphical Abstract