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Study on photofading of two natural dyes sodium copper chlorophyllin and gardenia yellow on cotton

机译：棉花两种天然染料铜叶绿素和栀子黄色的光移

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摘要

The light fastness of fabrics dyed with natural dyes is not satisfactory, which limits their applications in the textile industry. So far, the detailed photofading mechanism of natural dyes remains unclear. To improve the light fastness of cotton fabrics dyed with two natural dyes (sodium copper chlorophyllin and gardenia yellow), two additives ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) and sodium citrate were used to treat the dyed cotton fabrics via the dipping-padding method. The performance results showed that both the two additives had good effects on inhibiting the photofading of the dyed fabrics. The photofading mechanism of the two natural dyes was also investigated. The results from 1,1-Diphenyl-2-picrylhydrazyl free radical (DPPH) scavenging assay and cyclic voltammetry tests demonstrated very limited antioxidant properties of the two dyes. Singlet oxygen and hydroxyl radical were detected in the photosensitizing process of the two dyes by electron paramagnetic resonance method. The photo-induced chemiluminescence (PICL) tests confirmed that the color changes of the dyed cotton fabrics were reduced because the reactivities of the two dyes to react with reactive oxygen species were dramatically reduced in the presence of EDTA-2Na and sodium citrate. End products generated in the photofading of the two dyes were detected by high-performance liquid chromatography-mass spectrometry (HPLC-MS). Based on the comprehensive analysis of above results, possible degradation pathways of the two dyes were proposed. The mechanism study in this research may help shed light on proposing universal solutions to the poor light fastness of most natural dyes on cotton.
机译：用天然染料染色的织物的耐光性并不令人满意，这限制了它们在纺织工业中的应用。到目前为止，自然染料的详细光弃散射机理仍然不清楚。为了提高用两种天然染料（铜叶绿素和栀子花）染色的棉布织物的耐光性，使用两种添加剂乙二胺四乙酸二钠盐（EDTA-2NA）和柠檬酸钠通过浸渍填充方法治疗染色的棉织物。性能结果表明，两种添加剂对抑制染色织物的光散射有良好影响。还研究了两种天然染料的光弃散机制。从1,1-二苯基-2-富铬酰胺自由基（DPPH）清除测定和循环伏安法试验的结果表明了两种染料的非常有限的抗氧化性能。通过电子顺磁共振方法在两种染料的光敏过程中检测单态氧和羟基。光发光（PICL）测试证实，染色的棉织物的颜色变化降低，因为在EDTA-2NA和柠檬酸钠的存在下，两种染料与反应性氧物质反应的反应性显着降低。通过高效液相色谱 - 质谱（HPLC-MS）检测在两种染料的光移植中产生的终端产物。基于对上述结果的综合分析，提出了两种染料的可能降解途径。该研究的机制研究可能有助于揭示阐明棉花上最自然染料的差的耐光性的通用解决方案。

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  • 来源
    《Cellulose》 |2020年第14期|共23页
  • 作者

    Zhao Zhong; Zhang Mingwen; Hurren Chris; Zhou Liming; Wu Jihong; Sun Lu;

  • 作者单位

    Wuhan Text Univ Sch Text Sci &

    Engn Wuhan 430073 Peoples R China;

    Deakin Univ Inst Frontier Mat Geelong Vic 3216 Australia;

    Deakin Univ Inst Frontier Mat Geelong Vic 3216 Australia;

    Guangdong Esquel Text Co Ltd Grp R&

    D Ctr Foshan Peoples R China;

    Wuhan Text Univ Sch Text Sci &

    Engn Wuhan 430073 Peoples R China;

    Wuhan Text Univ Sch Text Sci &

    Engn Wuhan 430073 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 有机化学;
  • 关键词

    Natural dyes; Photofading; Cotton fabric; ROS;

    机译：天然染料;PhotoFading;棉布;ROS;

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