大青叶色素超声波提取及其对真丝绸的染色

Ultrasonic extraction of pigment from Folium Isatidis and its dyeing of silk fabrics

采用超声波提取天然染料大青叶色素,通过单因素试验和正交试验,对提取温度、时间、料液比、乙醇浓度、超声波功率进行对比试验研究,得出大青叶色素提取的优化工艺条件为:乙醇质量分数50%,超声波功率 350 W ,料液比1:2 0 ,提取温度50℃:,超声波作用时间45 min。继而利用大青叶色素提取液对真丝绸进行超声波染色工艺研究,优化的染色工艺条件为:超声波功率200 W ,染色温度65℃,浴比 1:40,超声波作用时间55 min。最后运用不同媒染剂对真丝绸进行大青叶染色,发现利用硫酸铜进行媒染能够极大地提高染色织物的耐摩擦色牢度。

The extraction of natural dye from Folium Isatidis assisted with the ultrasonic wave is carried out. The single-factor test and orthogonal test are used to study the effects of the temperature, time, ex traction bath ratio, ethanol concentration and ultrasonic power on the extraction of the natural dyes. The optimum conditions for the extraction of pigment from Folium Isatidis are: ethanol 50 /, material to li- quor ratio 1 : 20, extracting at 50 ℃ for 45 min with ultrasonic power 350 W. Then, using the extracted Fo lium Isatidis pigment to the ultrasonic dyeing process of silk, the best dyeing conditions are: dyeing at 65 ℃ for 55 min with ultrasonic power 200 W and bath ratio 1 : 40. Finally, using different mordants to op timize the dyeing of Folium Isatidis extract, it is concluded that copper sulfate for mordant dyeing can greatly improve the color fastness of the dyed silk fabrics.