水解活性染料在酸性条件染羊毛的工艺研究

Wool Dyeing with Hydrolysed Reactive Dyes under Acidic Conditions

染棉活性染料易吸潮水解,保存期短,在碱性条件下固色,因此在存放和染色过程中产生了大量的对棉纤维上染率很低的水解活性染料,它们只能被当作废物处理掉。从经济和环保的角度考虑,都有把它们回收利用的必要。活性染料水解后的母体结构和酸性染料非常相似,利用这一点本课题选取了两种常见的X型活性染料:"活性艳蓝X-BR"和"活性艳红X-3B",将它们充分水解后上染羊毛织物。经过一系列的单项实验来研究染色时间、温度、中性盐浓度、pH值以及浴比对染色效果的影响。最后得出,如果能解决浮色问题,水解活性染料在酸性条件下染羊毛是可行的、必要的。

Reactive dyes,usually for cotton dyeing,tends to absorb water and hydrolyse. Its storage life is short and its color fixation is performed under basic conditions. Therefore,large amount of hydrolysed reactive dyes is resulted during its storage and dyeing of cotton fibres,they used to be cast away as wastes. Its recovery and use have become very necessary from standpoinls of economy and environmental protection. After hydorlysation,the parent structure of reactive dyes is very similar to that of acid dyes. For this,we selected two commonly used X type reactive dyes,i.e.,Reactive Brilliant Blue X-BR and Reactive Brilliant Red X-3B to dye wool after they had been fully hydrolysed. A range of single experiments are conducted and the influence of dyeing time and temperature,concentration of neutral salt,pH and bath ratio on the dyeing result is investigated. It finally draws a conclusion that if the loose color problem can be solved,it is feasible to dye wool with hydrolysed reactive dye under acidic conditions.