水溶性对芳伯胺染料Mannich反应染色性能的影响

Effect of water solubility on Mannich reaction dyeing performance of aromatic primary amine dyes

设计合成3只含桥基的H酸结构芳伯胺染料,探究水溶性基团对蚕丝织物上芳伯胺染料Mannich反应染色性能的影响。通过测试染料水溶液的紫外-可见光吸收光谱,分析染料的色光及最大吸收波长,探讨芳伯胺染料结构中水溶性基团数量对Mannich反应染色性能的影响。分别测试3只芳伯胺染料D1~D3按照常规酸性染料染色工艺和Mannich反应染色工艺对蚕丝织物染色的K/S值,比较染色蚕丝织物经过剥色前后的染色深度变化及各项染色牢度。结果表明:染料D1~D3在水溶液中的紫外-可见光吸收光谱随着—SO3 H基团数量变化表现出一定的差异性;芳伯胺染料结构中水溶性基团数量增多,使得蚕丝织物Mannich反应的染色效果先递增后下降。与常规酸性染料染色相比,染料D1~D3对蚕丝织物Mannich反应染色的色牢度均能够达到4级以上。该研究为芳伯胺染料在蚕丝上的Mannich反应染色提供了理论依据。

Three aromatic primary amine dyes containing H acid structure with bridge groups were designed and synthesized to explore the effect of water-soluble groups on the Mannich reaction dyeing properties of aromatic primary amine dyes on silk fabrics.The effect of the number of water-soluble groups in the structure of aromatic primary amine dyes on the dyeing performance of Mannich reaction was investigated by measuring the UV-visible light absorption spectrum of aqueous solution of the dye and analyzing the color light and maximum absorption wavelength of the dyes.The K/S values of the three aromatic primary amine dyes of D1~D3 on silk fabrics were tested according to the conventional acid dye dyeing process and Mannich reaction dyeing process,and the dyeing depth changes and color fastness of dyed silk fabrics before and after color stripping were compared.The results show that the UV-visible light absorption spectra of the three dyes in aqueous solution show certain differences with the number of—SO_3H groups.The increase in the number of water-soluble groups in the structure of aromatic primary amine dyes makes the dyeing effect of the Mannich reaction of silk fabrics first increase and then decrease.Compared with the conventional acid dyes,the color fastness of the three dyes to the Mannich reaction dyeing of silk fabrics can reach more than grade 4.This study provides a theoretical basis for the Mannich reaction dyeing of aromatic primary amine dyes on silk.