秦皮天然染料对羊毛的染色工艺

Mordant dyeing of wool with Cortex fraxini natural dye

为深入研究秦皮天然染料在染色加工中的应用,采用水浸提法从中药秦皮中提取天然染料对羊毛进行染色,通过测试染后样品K/S值对比了直接染色及不同媒染剂媒染染色工艺对染色效果的影响,并研究了染色温度及时间、染浴pH值、媒染剂硫酸铜用量、媒染温度及时间等后媒法染色工艺对羊毛染色效果的影响。结果表明:以硫酸铜作为媒染剂,采用后媒法染色工艺染色效果最好。秦皮天然染料对羊毛的最佳工艺为:后媒染染色工艺,染色温度100℃,染色时间45 min,染液pH值4.0,媒染剂硫酸铜用量2.0%(owf),媒染温度100℃,媒染时间30 min,染后样品K/S值及耐摩擦色牢度、耐皂洗色牢度显著提升。

In order to explore the application of cortex fraxini natural dye in dyeing process,wool fibers were mordant dyed with cortex fraxini natural dye extracted by water extraction method.Dyeing properties of direct dyeing and mordant dyeing using different mordant were compared by K/S value of dyed samples,and the effect of dyeing process containing dyeing temperature and duration,pH value of dyeing bath,amount of the mordant,mordant dyeing temperature and duration on the dyeing properties were experimentally investigated.The better results were achieved by post mordant dyeing with copper sulfate as mordant.The post mordant dyeing process of wool with cortex fraxini natural dye was optimized as follow:dyeing wool at 100℃for 45 min when pH value of dyeing bath was 4.0,and then post mordant dyeing with 2%(owf)copper sulfate at 100℃for 30min.K/S value,friction resistance fastness and washing fastness increased obviously for post mordant dyed sample.