Abstract

Natural dyes have promising features; however, there are some drawbacks limiting their application in textile dyeing, for example, low dyeing, and fastness properties due to the weak interaction with textiles. Many attempts have been made to improve these shortcomings by using additional chemicals such as metallic mordants which are classified as hazardous chemicals that cause some serious environmental problems. Therefore, we have designed a facile green method for the extraction of natural dye from Henna leaves using Acacia nilotica pods to improve the color intensity and enhance fibers/dye affinity. In this study, wool fabrics were dyed with Henna and Henna/Acacia dye at different dyeing conditions. FTIR and UV–vis spectrums showed peaks corresponding to tannin and its derivatives in the aqueous extract of modified Henna. Modified Henna dyed samples exhibited noticeable improvement in the color strength (K/S value), washing, rubbing, and lightfastness with excellent antibacterial activity against E. coli and S. aureus.

Graphic abstract

中文翻译：

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用相思树荚修饰的指甲花染料对羊毛织物的清洁染色和抗菌活性

摘要

天然染料具有广阔的前景。但是，由于与纺织品之间的相互作用较弱，因此存在一些缺点，限制了它们在纺织品染色中的应用，例如，低染色和牢度。已经进行了许多尝试以通过使用诸如金属媒染剂之类的附加化学品来改善这些缺点，所述金属媒染剂被归类为引起某些严重环境问题的危险化学品。因此，我们设计了一种简便的绿色方法，使用刺槐（Acacia nilotica）从指甲花叶中提取天然染料。豆荚可改善颜色强度并增强纤维/染料的亲和力。在这项研究中，羊毛织物在不同的染色条件下用指甲花和指甲花/阿拉伯树胶染色。FTIR和UV-vis光谱在改性指甲花的水性提取物中显示出与单宁及其衍生物对应的峰。改性的指甲花染色的样品在色强度（K / S值），洗涤，摩擦和耐光性方面均表现出明显的改善，并且对大肠杆菌和金黄色葡萄球菌具有出色的抗菌活性。

图形摘要