Reactive dyeing of synthetic fibers employing dyes containing a diazirine moiety
Reactive dyeing of synthetic fibers employing dyes containing a diazirine moiety
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使用含有二氮丙啶部分的染料对合成纤维进行活性染色
DOI：
10.1016/j.dyepig.2021.109555
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发表时间：
2021-06-22
影响因子：
4.5
通讯作者：
Cui, Zhihua
中科院分区：
文献类型：
--
作者：
Jiang, Hua;Guo, Guangluo;Cui, Zhihua
众所周知，丙纶(PP)或芳纶纤维很难用常规的染色方法染色，这限制了它们在纺织服装行业的进一步发展。在这里，我们报告了一种新的方法，用合成的含双氮类染料对合成纤维进行深度染色。将二氮杂环与生色团在150℃加热，生成了可与合成纤维中的C-H键共价键合的成色卡宾中间体。尽管氮分子是随着卡宾的形成而产生的，但事实证明，二氮杂环染料不会造成任何爆炸危险。通过对高温高压染色和载体固色法的比较，筛选出适合合成纤维活性染料染色的非水溶剂固色法。二氮杂基染料可与聚对苯二甲酸乙酯、尼龙、PP、芳纶、丙烯酸和氨纶纤维有效反应，固色率中等至极高。特别是，通过重复非水溶剂固色操作，PP、芳纶和丙纶织物的得色率进一步显著提高。在此基础上，提出了活性染料的染色固色机理。染色后织物的色牢度性能良好，是一种很有发展前景的合成纤维活性染料染色方法。
It is well-known that polypropylene (PP) or aramid fibers are challenging to dye by using conventional dyeing methods, which limits their further development in the textile and garment industry. Herein, we report a new methodology for deep dyeing synthetic fibers employing synthesized diazirine-containing dyestuffs. The combination of the diazirine moiety with a chromophore with heating at 150 degrees C produced the dye-forming carbene intermediate, which could covalently bond with the C-H bonds in the synthetic fibers. It was demonstrated that the diazirine dyes did not pose any explosive risk, although nitrogen molecules were generated along with the formation of carbene. Compared with the high-temperature-high-pressure dyeing and carrier dyeing-fixation methods, the non-aqueous solvent dyeing-fixation method was screened and certified to be suitable for the reactive dyeing of synthetic fibers. The diazirine-based dyes could efficiently react with poly (ethyl-eneterephthalate), nylon, PP, aramid, acrylic, and polyurethane (spandex) fibers with moderate to excellent fixation values. Particularly, the color yields of the PP, aramid, and acrylic fabrics were further improved significantly by repeating the non-aqueous solvent dyeing-fixation operation. Thereafter, the detailed dyeing and fixing mechanisms of the reactive dyeing method were proposed. Finally, the color fastness properties of these dyed fabrics were demonstrated to be excellent, thus making such a reactive dyeing method for synthetic fibers a very promising one for the future.