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

摘要:

摘要：通过将有色基团“嫁接”到醛类化合物的α-C上的方式，设计合成了9种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：与常用的活性染料相比，该类活性染料能够在温和条件下（35 ~ 40 °C，pH = 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，具备了活性染料的特征。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，符合节能减排的要求。 关键词：醛基；活性染料；表征；应用

Abstract:

Abstract: Nine reactive aldehyde dyes were synthesized by “grafting” colorant groups to the α-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 indicated that, without the addition of neutral salts and under mild conditions (T = 35-45 °C，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. Key words: aldehyde; reactive dyes; identification; application