Scholarlink

<p>The search for environmentally friendly processes suited to the textile industry has become a top priority, particularly for blue dyeing, which is essential in denim production, a high-demand sector. In this study, we introduce for the first time in Morocco the cultivation and localization of the plant producing natural indigo blue dye, using date palm nuts as a reducing agent alternative to traditional chemical reducers. The addition of sucrose during fermentation helped increase the yield of pure indigo. The results obtained, through the analysis of the maximum absorption wavelength using UV–visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and high-performance liquid chromatography (HPLC), revealed that the extracted pigment matched perfectly with that of standard synthetic indigo, thus confirming the success of the extraction. Dyeing conditions were carefully optimized to achieve shades ranging from light blue to dark blue, with ideal color strength (<i>K/S</i>) values. By using a 3% concentration of date palm pits, we achieved the required reduction potential of − 811&#xa0;mV (relative to Ag/AgCl, 3&#xa0;M KCl), enabling effective reduction of the dye. Fabrics dyed using this optimal method and fixed with a 1% NaCl concentration exhibited excellent wash, wet and dry rubbing, and light fastness (in the 4–5 range). In addition to their excellent dyeing properties, the wool fabrics dyed with indigo and reduced by date nuts also demonstrated significant antioxidant activity (&gt; 80%), thus providing a dual advantage in terms of durability and functionality. This innovative approach paves the way for sustainable and environmentally friendly solutions in the textile industry. This work therefore constitutes a comprehensive study, covering the optimization of natural indigo extraction, the adjustment of dyeing conditions, as well as the evaluation of colorimetric properties and dye fastness through various tests.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Harnessing Morocco’s Natural Indigo: Extraction and Reduction with Date Nuts for Enhanced Dyeing and Antioxidant Properties

  • 期刊论文

  • 发表日期：

    2026年3月13日

查看全文
  • Yosra Raji,
  • Ayoub Nadi,
  • Abdessamad Belhaouzi,
  • Meriem Saadouni,
  • Said Meftah,
  • Omar Cherkaoui,
  • Souad Zyade,
  • Sanaa Majid

摘要

The search for environmentally friendly processes suited to the textile industry has become a top priority, particularly for blue dyeing, which is essential in denim production, a high-demand sector. In this study, we introduce for the first time in Morocco the cultivation and localization of the plant producing natural indigo blue dye, using date palm nuts as a reducing agent alternative to traditional chemical reducers. The addition of sucrose during fermentation helped increase the yield of pure indigo. The results obtained, through the analysis of the maximum absorption wavelength using UV–visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and high-performance liquid chromatography (HPLC), revealed that the extracted pigment matched perfectly with that of standard synthetic indigo, thus confirming the success of the extraction. Dyeing conditions were carefully optimized to achieve shades ranging from light blue to dark blue, with ideal color strength (K/S) values. By using a 3% concentration of date palm pits, we achieved the required reduction potential of − 811 mV (relative to Ag/AgCl, 3 M KCl), enabling effective reduction of the dye. Fabrics dyed using this optimal method and fixed with a 1% NaCl concentration exhibited excellent wash, wet and dry rubbing, and light fastness (in the 4–5 range). In addition to their excellent dyeing properties, the wool fabrics dyed with indigo and reduced by date nuts also demonstrated significant antioxidant activity (> 80%), thus providing a dual advantage in terms of durability and functionality. This innovative approach paves the way for sustainable and environmentally friendly solutions in the textile industry. This work therefore constitutes a comprehensive study, covering the optimization of natural indigo extraction, the adjustment of dyeing conditions, as well as the evaluation of colorimetric properties and dye fastness through various tests.