Preparation of Alizarin Dye Dispersion Solution and Dyeing of Cotton Fabric

• Published in: 东华大学学报（英文版） Vol. 39; no. 6; pp. 557 - 562
• Main Authors: TAN Youzhi, WANG Yunhong, XU Yajing, GUO Lamei
• Format: Journal Article
• Language: English
• Published: College of Textiles,Donghua University,Shanghai 201620,China%College of Textiles,Donghua University,Shanghai 201620,China 31.12.2022; Key Laboratory of Textile Science&Technology,Ministry of Education,Donghua University,Shanghai 201620,China
• Subjects: alizarin dye; linear sulfonic anionic surfactant (LAS); disperse dye; fastness property
• ISSN: 1672-5220
• DOI: 10.19884/j.1672-5220.202106006

TS193; Alizarin, extracted from rubia cordifolia, is a green natural dye. However, its application has been limited by its poor water solubility and pH sensitivity. In this study, linear sulfonic anionic surfactant (LAS) had been studied as a new dispersant, which promoted the dyeing of alizarin on fabrics under mild conditions. Ultraviolet visible (UV-vis) spectra and Fourier transform infrared (FTIR) spectra confirmed appropriate bonding between alizarin and LAS, and the nano particle size analysis showed that LAS could promote the dispersion of alizarin in aqueous solution. Under the optimized condition of alizarin 4.8％ on mass of fabric (omf) and LAS solution 2×10-2 mol/L, the fabrics were dyed with alizarin at room temperature and pH neutral conditions. The dyed fabrics had good washing fastness and ironing fastness.