ABSTRACT

The extraction of natural dye using an aqueous method is a concept of green chemistry to avoid environmental pollution and toxicity. The present study was performed to improve the color strength and fastness properties of the fabrics by using natural dye and banana pseudo stem sap as a natural mordant. The natural dye was extracted from marigold flowers (Tagetes erecta) and optimized for dyeing of cotton and silk fabrics. The extraction of the dye was done in an aqueous solution without using any solvents. The optimum results were obtained when the fabric was dyed at 80°C for 60 min by keeping the mass to liquid ratio 1:40 at pH-7 (1.19). The color strength and CIELab (L*, a*, and b*) color parameters were also investigated. The effect of banana pseudo stem saps as a natural mordant on the color strength and fastness properties of the cotton and silk fabrics were evaluated and compared. The cotton fabrics were further characterized by FTIR spectroscopy and Scanning electron microscopy (SEM) to assess the physical and chemical changes after dyeing and mordanting.

摘要

使用水法提取天然染料是避免环境污染和毒性的绿色化学概念。本研究通过使用天然染料和香蕉假茎汁作为天然媒染剂来提高织物的色强度和牢度性能。天然染料是从万寿菊花（万寿菊）中提取的，并针对棉和丝织物的染色进行了优化。染料的萃取在水溶液中进行，不使用任何溶剂。当织物在 80°C 下染色 60 分钟时，在 pH-7 (1.19) 下保持 1:40 的质量与液体比，获得了最佳结果。颜色强度和 CIELab ( L*、a*和b*) 颜色参数也进行了研究。对香蕉假茎液作为天然媒染剂对棉丝织物色强和牢度的影响进行了评价和比较。棉织物通过 FTIR 光谱和扫描电子显微镜 (SEM) 进一步表征，以评估染色和媒染后的物理和化学变化。