Currently, the use of natural indigo dye has been treated as an alternative to overcome the environmental pollution caused by synthetic indigo. Irrespective of the indigo dye source, it must be reduced to its soluble form by using reducing agents in a suitable alkaline environment. Herein, bio-sugars such as glucose or fructose were used for this purpose. The results revealed that when fructose was used instead of glucose, colour strength (K/S) values increased. In this work, cotton was cationised with water-soluble chitosan. Water-soluble chitosan in a wide pH range extends the use of chitosan in textiles, which otherwise is limited due to its poor water solubility at pH above 6.0. Colour fastness washing test was conducted to evaluate the efficacy of cotton cationisation. The performance of cationised samples was around 30% higher in comparison to non-cationised samples. Moreover, in this article we have focused on integrating materials and design. We propose a garment, using natural indigo-dyed cotton and a zero-waste modelling approach, as a sustainable fashion product.

中文翻译：

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对天然靛蓝（Indigoferatinctoria）染色的见解：迈向环保服装

目前，使用天然靛蓝染料已被视为克服合成靛蓝造成的环境污染的替代品。无论靛蓝染料来源如何，都必须在合适的碱性环境中使用还原剂将其还原为可溶形式。在此，生物糖例如葡萄糖或果糖用于此目的。结果表明，当使用果糖代替葡萄糖时，颜色强度 ( K/S ) 值增加。在这项工作中，棉花被水溶性壳聚糖阳离子化。水溶性壳聚糖在较宽的pH范围内扩展了壳聚糖在纺织品中的应用，否则其在pH值高于6.0时水溶性差而受到限制。进行色牢度洗涤测试以评估棉阳离子化的功效。与非阳离子化样品相比，阳离子化样品的性能高出约 30%。此外，在本文中，我们重点关注材料和设计的整合。我们提出了一种采用天然靛蓝染色棉和零浪费造型方法的服装，作为可持续的时尚产品。