Constructing of Dyes Suitable for Eco-friendly Dyeing Wool Fibers in Supercritical Carbon Dioxide,ACS Sustainable Chemistry & Engineering

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Constructing of Dyes Suitable for Eco-friendly Dyeing Wool Fibers in Supercritical Carbon Dioxide
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-10-17 00:00:00 , DOI: 10.1021/acssuschemeng.8b03976
Feixia Li ₁ , Lihua Lv ₁ , Xuejun Wang ₁ , Weiru Zhi ₁ , Xinhua Lin ₁ , Jun Yan ₁ , Hongjuan Zhao ₁ , Fengling Song ₂ , Yanfeng Sun ₃ , Xiaoqing Xiong _{1,

2} , Laijiu Zheng ₁

Affiliation

Compared with traditional water dyeing, supercritical carbon dioxide (scCO₂) dyeing is more environmentally benign. scCO₂ is widely used as a green solvent in dyeing synthetic fibers. However, studies involving dyeing natural fibers in scCO₂ are scarce. The commonly used methods result in corrosion of the dyeing equipment. Thus, the development of new special dyes suitable for scCO₂ dyeing is necessary; in addition, insight into the dyeing mechanism is important in promoting the design and synthesis of dyes for wool fibers in scCO₂. On the basis of our previous work, a possible dyeing mechanism in which the dyes exhibit hydrophobic interaction with keratins is proposed. The N═N bond twisting in azo dyes promotes the dyes embedding into the spaces of the alpha helices in proteins. According to the proposed mechanism, two new azo disperse dyes (azo thiazole-N(CH₃)₂ and azo thiazole-OCH₃) were synthesized; these dyes enable the dyeing of wool fibers in scCO₂. Meanwhile, the introduction of a succinimidyl ester group results in the fixation rate of the new reactive disperse dyes azo thiazole-NHS and azo-NHS reaching 100%. The byproduct of azo thiazole-NHS and azo-NHS reacting with the amino group of wool keratin is not corrosive to the dyeing equipment, thus enabling an eco-friendly dyeing process for wool fibers. Our strategy of introducing a succinimidyl ester reactive group will promote the development of new functional disperse dyes suitable for dyeing wool fibers in scCO₂.

中文翻译：

适用于超临界二氧化碳的环保型羊毛纤维染色染料的构建

与传统的水染色相比，超临界二氧化碳（scCO ₂）染色在环境方面更有益。scCO ₂被广泛用作染色合成纤维的绿色溶剂。然而，很少有涉及将天然纤维染色在scCO ₂中的研究。常用的方法导致染色设备的腐蚀。因此，有必要开发适用于scCO ₂染色的新型特殊染料。此外，深入了解染色机理对于促进scCO _2中羊毛纤维染料的设计和合成很重要。。在我们以前的工作的基础上，提出了一种可能的染色机制，其中染料与角蛋白表现出疏水相互作用。偶氮染料中的N═N键扭曲会促进染料嵌入蛋白质中的α螺旋空间中。根据提出的机理，合成了两种新型的偶氮分散染料（偶氮噻唑-N（CH ₃）₂和偶氮噻唑-OCH ₃）。这些染料可以将羊毛纤维染色在scCO _2中。同时，琥珀酰亚胺基酯基团的引入导致新的反应性分散染料偶氮噻唑-NHS和偶氮-NHS的固着率达到100％。偶氮噻唑-NHS和偶氮-NHS的副产物与羊毛角蛋白的氨基反应不会腐蚀染色设备，从而使羊毛纤维的染色工艺更加环保。我们引入琥珀酰亚胺基酯反应性基团的策略将促进开发适用于在scCO _2中染色羊毛纤维的新型功能性分散染料。

更新日期：2018-10-17

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