Relationship between the molecular structure, molecular polarities and dyeing properties of benzisothiazole dyes containing multi-ester groups for PET fabric
作者:Xiyu Song、Huanghuang Chen、Aiqin Hou、Kongliang Xie
DOI:10.1016/j.molliq.2019.111892
日期:2019.12
The effects of the different ester groups in the dye molecules on the dyeing rate and wet fastness were analyzed. The disperse dyes containing ester group exhibited deeper and brighter intense blue hues than that of the non-ester one. Different ester groups had obvious effect on the dyeing rate of the dyes on PET fabric. The dye structure with two longer ester groups has better wet fastness. The results
具有高坚牢度的分散染料对于聚对苯二甲酸乙二酯(PET)织物的染色和印花非常重要。染料分子的酯化基团直接影响染料的耐湿牢度。本文设计并合成了一系列基于苯并异噻唑的具有不同酯基的偶氮分散染料。其化学结构通过傅里叶变换红外光谱(FT-IR),核磁共振技术进行表征(11 H NMR)和元素分析。讨论了含不同酯的染料对涤纶织物的染色性能。使用DFT方法在B3LYP / 6-31G(d)水平上计算和仿真了染料的最佳几何形状,键长,偶极矩,晶格尺寸和静电势能图。研究了含聚酯基团的苯并异噻唑染料的结构与染色性能之间的关系。分析了染料分子中不同酯基对染色速度和湿牢度的影响。含有酯基的分散染料显示出比非酯基染料更深和更亮的蓝色。不同的酯基对PET织物上染料的染色速率有明显的影响。具有两个较长酯基的染料结构具有更好的耐湿牢度。该结果对开发高坚牢度的分散染料具有重要意义。