Dyeing Recycled Cotton Fibers Using Curcuma Longa and Pterocarpus Santalinus Natural Dyes and Bio-mordant Chitosan

ABSTRACT

Problems such as the depletion of natural resources and the increase in environmental pollution brought about by industrialization, the concept of recycling gained great importance. Natural dyes have gained importance again with the increase in environmental awareness. For this purpose, the dyeability of recycled cotton yarns with natural dyes was examined in order to both protect natural resources and reduce the waste water load in dyeing. The paper also discussed a comparison between different ways to mordant cotton with different molecular weight chitosan. Although it was seen by FTIR analysis that cotton fibers were dyed, the presence of chitosan could not be clearly seen. It was explained by the use of low amounts of chitosan. It was observed that the mordanting processes performed with chitosan contributed to the increase in the color strengths, and higher color depths were obtained with the increasing chitosan concentration. Simultaneous mordanting in Curcuma longa dyeing, mordanting before Sandalwood dyeing provided higher color depths than others. The washing fastness of the samples dyed with Curcuma longa revealed the necessity of fastness improvement processes. It was concluded that chitosan mordanting process was effective in terms of sustainable natural dyeing, but it was necessary to improve fastness.

Graphical Abstract

摘要

由于工业化带来的自然资源枯竭和环境污染加剧等问题,循环利用的概念得到了高度重视. 随着环保意识的增强,天然染料再次变得重要. 为此,为了保护自然资源和减少染色废水量,研究了天然染料对再生棉纱的染色性能. 本文还讨论了用不同分子量的壳聚糖对棉进行媒染的不同方法的比较. 虽然FTIR分析表明棉纤维已染色,但壳聚糖的存在尚不清楚. 这可以通过使用少量的壳聚糖来解释. 观察到,用壳聚糖进行的媒染过程有助于颜色强度的增加,并且随着壳聚糖浓度的增加,获得更高的颜色深度. 在姜黄染色中同时媒染,檀香染色前媒染提供了比其他更高的颜色深度. 姜黄染色样品的洗涤牢度表明了提高牢度的必要性. 结果表明,壳聚糖媒染工艺对可持续自然染色是有效的,但有必要提高染色牢度.

KEYWORDS:

• Sustainability
• turmeric
• sandalwood
• FTIR
• K/S
• fastness

关键词:

• 持续性
• 姜黄
• 檀香木
• 要塞

Highlights

In this study, which was carried out to bring a sustainable and environmentally friendly dyeing process to the textile industry, the dyeability of recycled cotton with natural dyes with the help of different-moleculer-weighted-chitosan biomordant was investigated.

• chitosan increased color depths too much,

• chitosan could be used as a mordant,

• chitosan should be applied in different order according to the dyes,

• the effects of the molecular weights of chitosan on the color depth were different according to the dye were observed. To sum up, with the use of recycled cotton, the environmental effects of cotton during its production were eliminated, while completely natural products are used in its coloring.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been corrected with minor changes. These changes do not impact the academic content of the article.