Study of wool dyeing with natural dye extracted from chamomile flowers

ABSTRACT

In this study, wool fabric was dyed with chamomile flower. The influence of the pH, temperature, dyestuff concentration, and mordant on the adsorption was evaluated. The use of mordants caused no difference in dye uptake and the nonmordanted fabric showed good wash fastness. The fit of the kinetic model of pseudo-second order and the Langmuir-Freundlich isotherm indicated that the dyeing is related to the chemisorption process, although the physisorption cannot be neglected. The values from −9.34 to −12.30 (J mol⁻¹) for ΔG° and 41.50 (J mol⁻¹) for ΔH° indicated that dye adsorption was spontaneous and endothermic.

摘要

本研究以洋甘菊为原料，对羊毛织物进行染色。评价了pH、温度、染料浓度和媒染剂对吸附的影响。媒染剂的使用没有引起染料吸收的差异，非媒染织物具有良好的耐洗牢度。拟二阶动力学模型和LangmuirFreundlich等温模型的拟合表明，虽然物理吸附不能忽略，但染色与化学吸附过程有关。从-934到-1230（J mol-1）（g）和41.50（J mol-1）h的值表明染料吸附是自发的和吸热的。

KEYWORDS:

• Wool
• chamomile
• natural dye
• dyeing
• adsorption
• ecofriendly

关键词:

• 羊毛
• 洋甘菊
• 天然染料
• 染色
• 吸附作用
• 生态地

Acknowledgments

Authors would like to thank the Textile Department of the State University of Maringa where all experiments were conducted.

Additional information

Funding

This work was supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Brazil.