棉针织物冬青叶色素染色工艺研究

Holly Leaf Pigment Dyeing of Cotton Knitted Fabric

提取冬青叶天然色素,对棉织物进行媒染法染色,研究绿色棉织物的染色方法,探究媒染剂种类、染色时间、染色温度、氯化钠浓度、媒染温度等工艺参数对染色效果的影响,通过对染色织物的表观色深和颜色特征值评价,得到最佳染色工艺。结果表明:最佳染色工艺为以无水硫酸铜作为媒染剂进行后媒染色,染色时间90 min、染色温度80℃、氢氧化钠浓度4.0 g/L、氯化钠浓度40.0 g/L、媒染时间50min、媒染温度90℃、媒染剂浓度3.0 g/L、浴比1∶30;经此方法染色所得绿色棉织物的耐摩擦色牢度、耐皂洗色牢度和耐日晒色牢度基本满足服用要求。

Firstly,the natural pigment of holly leaves is extracted and then used to dye cotton fabrics by means of mordant dyeing.The dyeing method of cotton products with green color is obtained using copper salt as mordant with post-mordant dyeing.The effects of mordant type,dyeing time,dyeing temperature,sodium chloride dosage and mordant dyeing temperature on dyeing effect are explored.The optimal dyeing process is obtained by evaluating the apparent color depth and color characteristic value of the dyed fabric.The optimal dyeing conditions are as follows:anhydrous copper sulfate is used as mordant for post-mordant dyeing,the dyeing time is 90 minutes,dyeing temperature is 80℃,sodium hydroxide dosage is 4.0 g/L,sodium chloride dosage is 40.0 g/L,mordant dyeing time is 50 minutes,mordant dyeing temperature is 90℃,mordant dosage is 3.0 g/L,and bath ratio is 1∶30.The rubbing fastness,washing fastness and sun fastness of green cotton fabric dyed by this method basically meet the wearing requirements.