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Exploring natural colorant behavior of husk of durum ( Triticum durum Desf.) and bread ( Triticum aestivum L.) wheat species for sustainable cotton fabric dyeing
Environmental Science and Pollution Research Pub Date : 2021-05-14 , DOI: 10.1007/s11356-021-14241-6
Ali Ahmad Khan 1 , Shahid Adeel 2 , Muhammad Azeem 1 , Naeem Iqbal 1
Affiliation  

Revival of natural colorants in textile dyeing is one of the important strategies to reduce synthetic chemical-based environmental pollution. The study has been conducted to explore the coloring potential of durum (Triticum durum Desf.) and bread (Triticum astivum L.) wheat husk for fabric dyeing. The results showed that both wheat species husk could be an excellent source of natural dye, if extracted in alkaline medium. It has been observed that durum wheat husk based dye worked best at 70°C with a pH 11.0 and salt concentration of 8.0 g/100 ml of solution. Similarly, alkaline extract of bread wheat husk worked better at 80°C with dyeing solution pH 9.0 and salt concentration of 8.0 g/100 ml. Bio-mordanting experiments results revealed pomegranate rind (7%) as most effective bio-mordant to obtain high color strength of wheat husk treated fabric. In chemical-mordanting, tannic acid (5%) as pre-mordant and chrome (5%) as post-mordant have improved the color strength more than all other quantities of employed mordants. FTIR analysis indicated the presence of flavonoids as major colorant compounds in wheat husk–based natural dye. Suggested ISO standards for colorfastness illustrated good color strength ratings of husk-based dyed fabric when treated with bio-mordants as compared to chemical counterparts. Hence, husk of both bread and durum wheat species has great potential to be used as source of eco-friendly natural colorant for cotton dyeing.



中文翻译:

探索硬粒小麦 (Triticum durum Desf.) 和面包 (Triticum aestivum L.) 小麦种的天然着色剂行为,用于可持续棉织物染色

在纺织品染色中恢复天然着色剂是减少合成化学环境污染的重要策略之一。该研究旨在探索硬粒小麦 ( Triticum durum Desf . ) 和面包 ( Triticum astivum )的着色潜力L.) 用于织物染色的小麦壳。结果表明,如果在碱性介质中提取,这两种小麦种皮都可能是天然染料的极好来源。已经观察到,基于硬粒小麦壳的染料在 70°C、pH 值为 11.0 和盐浓度为 8.0 g/100 ml 溶液时效果最佳。同样,面包小麦壳的碱性提取物在 80°C、染色溶液 pH 值为 9.0 和盐浓度为 8.0 g/100 ml 时效果更好。生物媒染实验结果表明,石榴皮 (7%) 是最有效的生物媒染剂,可让小麦壳处理过的织物获得高着色力。在化学媒染中,作为前媒染剂的单宁酸 (5%) 和作为后媒染剂的铬 (5%) 比所有其他用量的媒染剂更能提高颜色强度。FTIR 分析表明黄酮类化合物作为基于小麦壳的天然染料中的主要着色剂化合物的存在。建议的 ISO 色牢度标准表明,与化学对应物相比,当用生物媒染剂处理时,基于果壳的染色织物具有良好的色强度等级。因此,面包和硬粒小麦的外壳都具有用作棉染色的环保天然着色剂来源的巨大潜力。

更新日期:2021-05-15
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