以醛基为反应基团的活性染料的合成、表征及应用

Synthesis,Identification and Application of Reactive Aldehyde Dyes

通过将有色基团＂嫁接＂到醛类化合物的α-C上的方式,设计合成9只以醛基为反应基团的活性染料,通过FTIR、UV-Vis、MS对其结构进行表征。以铝鞣白湿皮为底物进行了应用实验,并测量了上染时的4个染色特征值,即S值（直接性值）、E值（吸尽值）、F值（固色值）和R值（反应活性值）。结果表明,与常用活性染料相比,该类活性染料能够在温和条件下（35~40℃,p H=4.0~6.5）,于1.5 h内将皮革着色;染色产物耐水洗牢度都在4级以上,具备了活性染料特征。醛基活性染料不存在水解问题,染色过程中也不需要加入中性盐,符合节能减排要求。

Nine reactive aldehyde dyes were synthesized by ＂grafting＂ colorant groups onto the ot-C of several aldehyde compounds. The structures of the target products were characterized by means of FTIR, UV-vis, and ESI-MS. Aluminum-pretanned wet-white sheep leather was chosen as a substrate for the application experiments, and four dyeing property indexes, i. e. , substantivity （ S）, exhaustion （ E）, fixation（ F） and reactivity（R）were measured. The results indicate that,without the addition of neutral salts and under mild conditions （ T = 35 - 40 ℃, pH = 4.0 - 6.5 ）, all the dyes could dye wet-white leather within 1.5 h, and the dyed leather possessed a satisfactory washing-fastness.