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<p>Recently, the treatment of natural dyes on textile substances has been focused on all over the world, possibly due to increasing environmental awareness, pollution control, and ecology. The study explores the potential of colorant extraction from date palm fiber, specifically focusing on the fibrillium component. The process of extracting natural colors from plants using the microwave-assisted extraction (MAE) approach has grown a lot in popularity in recent years. In this work, the household microwave oven was used to extract pigments from the fibrillium of date palm fiber. Particular focus was given on evaluating the effects of extraction duration, extraction pH, and microwave power on the overall process performance in order to develop and optimize this extraction approach. Total condensed tannins, total phenolic content, and total flavonoids content were assessed in each instance. The extraction procedure was optimized by the use of a multilevel three-factor design. The optimum conditions for dye extraction were identified as an extraction time of 3 min, pH 9, and a microwave power of 350 W. Under these optimized conditions, the extraction efficiency reached 33.78 g·L⁻<sup>1</sup> of total phenolics, with a color yield (K/S) of 11.20. The extract also exhibited a total flavonoid content of 20.91 g·L⁻<sup>1</sup> and a total condensed tannin content of 9.34 g·L⁻<sup>1</sup>.</p>

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Microwave-assisted extraction and RSM optimization of date palm fibrillium colorants for sustainable wool dyeing

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • Rawdha Znegui,
  • Noureddine Baaka,
  • Nizar Meksi,
  • Hatem Dhaouadi

摘要

Recently, the treatment of natural dyes on textile substances has been focused on all over the world, possibly due to increasing environmental awareness, pollution control, and ecology. The study explores the potential of colorant extraction from date palm fiber, specifically focusing on the fibrillium component. The process of extracting natural colors from plants using the microwave-assisted extraction (MAE) approach has grown a lot in popularity in recent years. In this work, the household microwave oven was used to extract pigments from the fibrillium of date palm fiber. Particular focus was given on evaluating the effects of extraction duration, extraction pH, and microwave power on the overall process performance in order to develop and optimize this extraction approach. Total condensed tannins, total phenolic content, and total flavonoids content were assessed in each instance. The extraction procedure was optimized by the use of a multilevel three-factor design. The optimum conditions for dye extraction were identified as an extraction time of 3 min, pH 9, and a microwave power of 350 W. Under these optimized conditions, the extraction efficiency reached 33.78 g·L⁻1 of total phenolics, with a color yield (K/S) of 11.20. The extract also exhibited a total flavonoid content of 20.91 g·L⁻1 and a total condensed tannin content of 9.34 g·L⁻1.