壳聚糖改性棉织物的黑枸杞色素染色

Dyeing of Chitosan Modified-cotton Fabric with Black Lycium Barbarum Pigment

提取黑枸杞天然色素,对壳聚糖改性棉织物进行直接法染色,探究了染浴pH值、温度、时间、氯化钠浓度等因素对染色效果和防紫外性能的影响,通过对染色织物的色深值Integ、颜色特征值及UPF值综合评价,得到最佳染色工艺。结果表明,具体工艺如下:浴比1∶30,提取母液30 mL,pH值为4,食盐为0,焙烘温度110℃,焙烘时间4 min;染色过程中可不添加食盐,实现了无盐染色,大大减轻了染料废水处理的负担;经此方法染色所得紫色棉织物不但具有较好的耐摩擦色牢度、耐皂洗色牢度和耐日晒色牢度,同时具有优良的防紫外线性能。

Firstly,the natural pigment of lycium barbarum was extracted,and then the chitosan modified cotton fabric was directly dyed with lycium barbarum extract.The effects of bath pH value,temperature,time,concentration of sodium chloride and other factors on the dyeing effect and UV resistance were explored.Through the comprehensive evaluation of the color depth value Integ,color characteristic value and UPF value of the dyed fabric,the best dyeing process was obtained as follows:bath ratio of 1∶30,extraction mother liquor of 30 mL,pH value of 4,salt concentration of 0,baking at 110℃for 4 minutes.At the same time,the salt-free dyeing is realized without adding salt in the dyeing process,which greatly reduces the burden of dye wastewater treatment.The dyed purple cotton fabric not only has good rubbing fastness,washing fastness and sun fastness,but also has excellent UV resistance.