The Dyeing of Cotton Fabric with Natural Dye from Buddlejae Flos

ABSTRACT

Buddlejae Flos is a promising natural dye for cotton fabric. Buddlejae Flos extraction and AlK(SO₄)₂.12H₂O were dissolved in 70% ethanol and the cotton fabric was dyed with this solution. And its dyeing kinetics and isotherm were evaluated. The results showed that dye absorption increased with the increase in dye concentration and dyeing temperature. The absorption kinetics of Buddlejae Flos dye onto cotton fabric were best described by the pseudo-second-order kinetics model (R² > 0.99) and absorption isotherm fitted the Freundlich model better. Optimal dyeing conditions were selected through orthogonal trial: 1:30 bath ratio, 80°C dyeing temperature, 100 min dyeing time, and 1.25 g/L mordant. The Buddlejae Flos dyed cotton fabric presented good antioxidant performance. The wash fastness and rubbing fastness of the dyed cotton fabric are both above 4 grades. It is concluded that Buddlejae Flos has a good potential to act as a source of natural colorant for cotton dyeing in the ethanol-water system.

摘要

佛手花是一种很有前途的棉织物天然染料. 佛手草提取及AlK（SO4）2. 将12H2O溶于70%乙醇中，对棉织物进行染色. 并对其染色动力学和等温线进行了评价. 结果表明，随着染料浓度和染色温度的升高，染料的吸附量增大. 拟二级动力学模型（R2>0.99）较好地描述了佛手染料在棉织物上的吸附动力学，吸附等温线更符合Freundlich模型. 通过正交试验确定了最佳染色条件: 浴比1:30，染色温度80℃，染色时间100min，媒染剂用量1.25g/L. 佛手染色棉织物具有良好的抗氧化性能. 染色棉织物的洗涤牢度和摩擦牢度均在4级以上. 结果表明，佛手花作为棉织物乙醇-水体系染色的天然着色剂具有良好的应用前景.

KEYWORDS:

• Buddlejae Flos
• cotton
• dyeing
• natural dye
• dyeing kinetics
• antioxidant

关键词:

• 关键词: Buddlejae Flos
• 佛手草
• cotton
• 棉
• dyeing
• 染色
• natural dye
• 天然染料
• dyeing kinetics
• 染色动力学
• antioxidant抗氧化剂

Acknowledgments

The authors gratefully acknowledge the financial support provided by the Chinese National Innovation and Entrepreneurship Training Program for College Students and Fundamental Research Funds of Wuhan Textile Universities.