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首页> 美国卫生研究院文献>Journal of Visualized Experiments : JoVE >Synthesis of Plant Phenol-derived Polymeric Dyes for Direct or Mordant-based Hair Dyeing
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Synthesis of Plant Phenol-derived Polymeric Dyes for Direct or Mordant-based Hair Dyeing

机译：直接或基于媒染剂的植物酚类高分子染料的合成

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摘要

Effective hair dyeing through in situ incubation of keratin hair with the products of fungal laccase-catalyzed polymerization of plant phenols has been previously demonstrated. However, the dyeing process takes a long time to complete compared to commercial hair-dyeing products. To overcome this bottleneck, pre-synthesized polymeric products of the oxidative reaction of Trametes versicolor laccase on catechin and catechol, either with or without mordant agents (e.g., FeSO4), were here employed to achieve permanent keratin hair dyeing in various colors and shades. The laccase action in acidic sodium acetate buffer led to a deep black coloration after coupling reactions between the plant phenols. The colored dye products were then desalted and concentrated with ultrafiltration. The dyes, with or without mordant agents, caused a significant increase in ΔE values (i.e., color difference value) in gray human hair within 2.5 hours. In addition, different keratin colors and shades were induced depending upon the mordanting and pH changes. The dyed hair also exhibited a strong resistance to detergent treatments, indicating that our methods can give rise to permanent hair dyeing. Overall, our work has provided novel insight into developing eco-friendly hair-dyeing methods as alternatives to commercial toxic diamine-based dyes.
机译：先前已经证明了通过角蛋白头发与真菌漆酶催化的植物酚聚合产物的原位温育来进行有效的染发。但是，与商业染发产品相比，染色过程需要很长时间才能完成。为了克服该瓶颈，在这里，无论有无媒染剂（例如，FeSO 4），都可以使用预先合成的Trametes versicolor漆酶在儿茶素和儿茶酚上的氧化反应聚合的聚合物产物，以实现各种颜色和色调的永久性角蛋白染发。在植物酚之间的偶联反应后，酸性乙酸钠缓冲液中的漆酶作用导致深黑色。然后将有色染料产物脱盐并通过超滤浓缩。具有或不具有媒染剂的染料在2.5小时内导致人发灰色的ΔE值（即色差值）显着增加。另外，取决于媒质和pH变化，诱导出不同的角蛋白颜色和阴影。染过的头发还对洗涤剂处理表现出很强的抵抗力，这表明我们的方法可以永久染发。总体而言，我们的工作为开发环保的染发方法提供了新的见解，可替代商业上有毒的二胺基染料。

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