艾叶天然色素应用于苎麻纤维染色的研究

通过设计正交实验,得到优化的微波法提取艾叶色素的工艺为:料液比1∶15、微波功率560 W、处理时间2 min;对苎麻纤维进行阳离子改性,得到优化的改性工艺为:改性时间50 min、改性温度50℃、改性剂用量15 g/L、烧碱用量10 g/L;用艾叶色素上染阳离子改性的苎麻纤维,设计4因素3水平正交实验,采用一浴二步后媒染法进行染色实验,得到优化的染色工艺为:染色温度60℃、染色时间30 min、染液pH=5、艾叶色素提取液用量70 mL。

Study on the application of natural pigment of artemisia argyi leaf in ramie fiber dyeing

The optimum microwave extraction technology of artemisia argyi leaf pigment was achieved by the orthogonal experimental design. It was found that microwave power and processing time were 560 W and 2 min at the optimum material to liquid ratio of 1∶15, respectively. The cationic modification of ramie fibers by orthogonal test was designed and optimized. When 15 g/L modifier and 10 g/L NaOH were added, the optimal reaction time and temperature were 50 min and 50 ℃, respectively. Cationic modified ramie fibers were dyed with artemisia argyi leaf pigments by the method of one bath and two steps post mordant. The optimized dyeing parameters were determined by an orthogonal test offour factors and three levels, which were described as follows: dyeing temperature 50 ℃, dye solution pH 5, dosage of pigment extraction from artemisia argyi 70 m L and dyeing time 30 min.