ABSTRACT

In recent years, natural dyes are gaining importance in textile dyeing applications as they are renewable and biodegradable. In the present study, we selected Eleutherine bulbosa bulbs as a source of natural colorant for dyeing cotton fabrics. Water was used for the extraction of dye, a step toward eco-friendly dyeing. The dyeing was carried out with different mordants and color fastness properties were determined. Relatively higher color strength values were obtained with Myrobalan fruit extract (Mfe- 4.267) and Pomegranate rind extract (Pre- 2.731) as mordants. With Mfe and Pre good color strength values were retained even after detergent wash (3.103 and 1.865) or light exposure (3.689 and 2.395). A combination of Eleutherine dye with turmeric extract was also experimented. Results showed better color strength values with Mfe (4.304) and Pre (3.120). The color retainability after detergent wash (2.960 and 2.100) or light exposure (4.186 and 2.911) was also good with these mordants. Results revealed that E. bulbosa could be used as a source of an ecofriendly dye for cotton fabrics, and the dye-fixing is most effective with the natural mordant myrobalan. The composition of dye extract was analyzed by LCMS technique, 15 compounds were detected, most of which are quinone derivatives.

摘要

近年来，天然染料在纺织染色应用中越来越重要，因为它们是可再生和可生物降解的。在本研究中，我们选择Eleutherine球茎作为染色棉织物的天然着色剂来源。水被用于提取染料，向环保染色迈出了一步。用不同媒染剂进行染色并测定色牢度特性。使用 Myrobalan 果实提取物 (Mfe-4.267) 和石榴皮提取物 (Pre-2.731) 作为媒染剂获得了相对较高的颜色强度值。即使在洗涤剂洗涤（3.103 和 1.865）或光照（3.689 和 2.395）之后，Mfe 和 Pre 仍保持良好的颜色强度值。Eleutherine的组合还试验了用姜黄提取物染色。结果显示 Mfe (4.304) 和 Pre (3.120) 具有更好的颜色强度值。这些媒染剂在洗涤剂洗涤（2.960 和 2.100）或光照（4.186 和 2.911）后的保色性也很好。结果表明，E.bulbosa可用作棉织物环保染料的来源，并且使用天然媒染剂 myrobalan 进行固色最有效。采用LCMS技术对染料提取物进行成分分析，共检出15种化合物，其中大部分为醌衍生物。