Application of Multifunctional Reactive Dyes on the Cotton Fabric and Conditions Optimization by Response Surface Methodology

ABSTRACT

This study presents optimization of dyeing variables for dyeing 100% cotton fabric with two novel bifunctional reactive dyes D-1 and D-2. These dyes have sulfatovinylsulfone and monochlorotriazine functional moieties. The impact of different variables, including dyeing temperature, salt concentration, and alkali, was investigated and optimized using response surface methodology (RSM). In spite of an exploring structural difference between both of these dyes, the dyeing temperature was optimized at the same value (61.68°C). The optimized conditions of salt (43.33 g/L) and alkali (29.50 g/L) for D-1 were resulted in 72.29% (±3) of exhaustion and 67.45% (±3) fixation. Similarly, D-2 showed 69% (±3) of exhaustion and 62.5% (±3) fixation at optimum value of salt (44.05 g/L) and alkali (33.87 g/L) concentration. Results showed better fixation and exhaustion of D-1 than dye D-2 which may be attributed to its more structural planarity and lower steric hindrance. The different fastness behaviors of dyes were found good to excellent for both dyes. The results attained were useful and suitable for commercial dyeing processes.

摘要

研究了两种新型双功能活性染料D-1和D-2对100%纯棉织物染色工艺参数的优化. 这些染料具有磺基乙烯基砜和一氯三嗪的官能团. 采用响应面法（RSM）研究了染色温度、盐浓度、碱浓度等因素对染色效果的影响. 尽管这两种染料的结构差异很大，但在相同的染色温度（61.68℃）下对染色温度进行了优化. 在盐（43.33g/L）和碱（29.50g/L）条件下，D-1的耗竭率为72.29（±3）%，固色率为67.45（±3%）. 同样地，在盐（44.05g/L）和碱（33.87g/L）的最佳浓度下，D-2表现出69（±3）%的衰竭和62.5（±3）%的固定. 结果表明，D-1比染料D-2具有更好的固色性和上染率，这可能是由于其具有更高的结构平面度和较低的位阻. 结果表明，两种染料的染色牢度表现从好到优. 所得结果可用于工业染色.

KEYWORDS:

• Response surface methodology
• optimization
• steric hindrance
• reactive dyes
• cotton fabric

关键词:

• 响应面法
• 优化
• 空间位阻
• 活性染料
• 棉织物

Conflicts of interest

The author declares no conflicts of interest regarding the publication of this paper.