Department of Botany, Division of Science and Technology, University of Education, Lahore 54770, Pakistan.
Department of Chemistry, University of Education Lahore, Vehari Campus, Vehari 61100, Pakistan.
Molecules. 2024 Sep 15;29(18):4392. doi: 10.3390/molecules29184392.
The current study proceeded to reduce the environmental hazards spreading worldwide due to synthetic dyes. To overcome these problems, eco-friendly natural dyes are introduced as alternative sources of synthetic dyes. The present study was focused on exploring the bio-colorant of the aqueous and acidic extract of the bark of L. for the dyeing of both silk and cotton samples. The results of the extraction medium specified that the aqueous extract gave maximum colorant solubility and upon fabric dyeing produced higher color strength in contrast to the acidic medium. The optimization experimentation data showed that excellent color strength of silk fabric was found at 45 min dyeing time duration, in 35:1 mL dye extract, and using 2% salt (NaCl) as an exhausting agent, whereas cotton fabric showed the maximum K/S value at 60 min dyeing time, in a 45:1 mL liquor ratio, and with the use of 2% salt. Bio-mordants produce different shades on both fabrics. Bio-mordanting experiments on silk revealed that pre-mordanting with 2% turmeric and 3% pomegranate, and post-mordanting using 3% turmeric and 2% pomegranate produced a darker shade. In the case of cotton, the pre-mordanted samples with 2% turmeric and 3% pomegranate and the post-mordanted samples with 4% turmeric and 4% pomegranate gave the highest color strengths. All the mordanted samples gave excellent fastness ratings. Overall, it has been found that Bakain bark proved to be an excellent source of tannin. The result of this study showed that it could be a cost-effective and eco-friendly dye source for textile progress.
本研究旨在减少因合成染料而在全球范围内扩散的环境危害。为了克服这些问题，引入了环保型天然染料作为合成染料的替代来源。本研究专注于探索 L. 的树皮的水提物和酸提物的生物染料，用于对丝绸和棉样品进行染色。提取介质的结果表明，水提物给出了最大的染料溶解度，并且与酸介质相比，在织物染色时产生了更高的色强度。优化实验数据表明，在 45 分钟的染色时间、35:1 mL 染料提取液和 2%盐（NaCl）作为助剂的条件下，丝绸织物的颜色强度最佳；而棉织物在 60 分钟的染色时间、45:1 mL 的液比和 2%盐的条件下显示出最大的 K/S 值。生物媒染剂在两种织物上产生不同的色调。丝绸的生物媒染实验表明，用 2%姜黄和 3%石榴预媒染，然后用 3%姜黄和 2%石榴后媒染，可以产生更深的色调。对于棉织物，用 2%姜黄和 3%石榴进行预媒染，以及用 4%姜黄和 4%石榴进行后媒染的样品具有最高的颜色强度。所有媒染的样品都具有极好的色牢度评级。总的来说，发现 Bakain 树皮是单宁的极好来源。这项研究的结果表明，它可能是一种具有成本效益和环保的纺织染料来源。
