https://orcid.org/0000-0003-1709-769X
![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
ABSTRACT
The study approached to extract natural dye from the wastage leaves of Polyalthia longifolia and evaluate the dyeing properties on silk and cotton fabrics. Different analysis techniques were used to understand the characteristics of the dye and apply them to silk and cotton fabrics using UV–Vis spectrophotometer, FTIR, and SEM. The colorimetric properties were analyzed by reflectance spectrometry in terms of L*, a*, b*, c*, h°, and K/S values. The color fastness was investigated in terms of light, wash, rub (dry/wet), and perspiration tests. The optimum dye extraction obtained was 18% at 90°C in 60 min of extraction in the aqueous alkaline medium. The analysis results showed that the extracted reddish-brown colored dyes confirmed the presence of tannins and phenolic compounds. The color was fixed firmly on silk fabrics without any mordant. The post-mordanting method with ferrous sulfate and copper sulfate showed a better shade and lightfastness than other mordanting processes on silk fabrics. Ferrous sulfate and copper sulfate mordanted cotton fabrics showed good light and wash fastness properties. The study observed that the extracted natural dye of P. longifolia has the potential to be used as a textile dye.
摘要
本研究探讨了从长叶锦葵的残叶中提取天然染料, 并对其在真丝和棉织物上的染色性能进行了评价. 使用不同的分析技术了解染料的特性, 并使用紫外-可见分光光度计, FTIR和SEM将其应用于丝绸和棉织物. 通过反射光谱法分析L*, a*, b*, c*, h°和K/S值的色度特性. 通过光照, 洗涤, 摩擦 (干/湿) 和汗液试验对色牢度进行了研究. 在碱性水介质中提取60分钟, 在90°C下获得的最佳染料提取率为18%. 分析结果表明, 提取的红棕色染料证实了单宁和酚类化合物的存在. 这种颜色牢固地固定在丝绸上, 没有任何媒染剂. 与其他媒染方法相比, 硫酸亚铁和硫酸铜的后媒染方法在真丝织物上表现出更好的色度和耐光性. 硫酸亚铁和硫酸铜媒染棉织物具有良好的耐光性和耐洗性. 本研究观察到, 长叶紫荆提取的天然染料具有用作纺织染料的潜力.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Supplementary material
Supplemental data for this article can be accessed online at https://doi.org/10.1080/15440478.2022.2081281
