Disperse dyes are not currently applied to wool commercially, in large part because of inadequate wash fastness, but they do have potential, especially for wool‐polyester blends. In this study, for the first time hydrogen peroxide was investigated to increase the wash fastness of disperse dyes on wool. In the absence of oxidants, 10 disperse dyes from seven classes imparted colours with a range of depths (K/S 2‐26) with wash fastness (grey scale ratings for colour change) grades of 3 to 4‐5. Hydrogen peroxide had only small effects on colours and gave only small enhancements to wash fastness, which were limited to anthraquinone, nitrodiphenylamine, disazo and coumarin dyes. The bleach activators Prestogen W and citric acid enhanced the bleaching effect of hydrogen peroxide but did not assist with raising wash fastness. Hydrogen peroxide in post‐dyeing scouring made the dyeings brighter but did not significantly enhance wash fastness. Ammonium persulphate, which was included for benchmarking with earlier studies, yellowed the wool and decomposed some dyes. This study extends the range of dye classes whose wash fastness on wool can be improved by ammonium persulphate to now include diazo, coumarin and methine, and confirms that oxidants/free radical initiators have potential for enabling the disperse dyeing of wool.

中文翻译：

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用氧化剂增强羊毛上分散染料的耐洗牢度

分散染料目前尚未在商业上应用于羊毛，这在很大程度上是由于水洗牢度不足而引起的，但它们确实具有潜力，尤其是对于羊毛-聚酯共混物。在这项研究中，第一次研究了过氧化氢，以提高羊毛上分散染料的耐洗牢度。在没有氧化剂的情况下，七种类别的10种分散染料可赋予深度范围（K / S2‐26）的耐洗牢度（变色的灰度等级）等级为3至4‐5。过氧化氢对颜色的影响很小，对洗牢度的影响也很小，仅限于蒽醌，硝基二苯胺，二偶氮和香豆素染料。漂白活化剂Prestogen W和柠檬酸增强了过氧化氢的漂白效果，但无助于提高洗涤牢度。染色后精练中的过氧化氢使染料变亮，但没有显着提高水洗牢度。过硫酸铵已包括在早期研究的基准中，使羊毛变黄并分解了一些染料。这项研究扩大了染料种类的范围，该染料种类可以通过过硫酸铵改善在羊毛上的耐洗牢度，现在包括重氮，香豆素和次甲基，