Investigation of Dyeing Properties of Different Fabric Species with Alkanna Orientalis Root Extract

In this study, the dyeing properties of different fabric species were investigated using root extract of yellow sormunen （Alkanna orientalis）. For this purpose, the cotton and wool fabrics were dyed using the root extract of yellow sormunen by pre-mordanting, together-mordanting and last-mordanting methods with copper sulfate （CuSO4）, iron sulfate （FeSO4） and aluminum sulfate （AiK（SO4）2） at medium pH. The same procedure was applied to cotton and wool fabrics that allowed in Artifical Urinary System （AUS） [%3 NH3 ＋ %3 urea ＋ %3 CAC2O4（g/v）] for 24 h. The color codes were determined with Pantone Color Quide, and K/S and L＊ a＊ b＊ values were detected with color measurement spectrophotometer, and also washing-, crocking-fastness levels were evaluated using gray scale. According to the evaluations, the fabrics dyed pre-treated with AUS have higher fastness values than the unpre-treated dyed fabrics with AUS.

左旋紫草素转化工艺

目的研究紫草总色素转化为左旋紫草素的最佳工艺条件。方法采用L9(34)正交实验法,以左旋紫草素转化率为指标,优选转化温度、转化时间、2%氢氧化钠的体积与紫草总色素的质量比。结果温度35℃,转化时间4 h,2%氢氧化钠的体积与紫草总色素的质量比例为4.5 m L·mg-1时,紫草素转化率最高,平均转化率为64.86%。结论该优选工艺方便简便,经济环保,适合工业化生产。

紫草色素的提取及高效液相色谱分析

采用脂肪提取器法、微波提取法以及超声波提取法进行了紫草色素的提取实验,选用的提取溶剂为石油醚、乙酸乙酯以及95%乙醇,结果表明使用微波法采用95%乙醇为溶剂可以得到最多数量的提取物。此外,建立了提取物样品的高效液相色谱定量分析方法,分析结果表明采用脂肪提取器法,使用乙酸乙酯为提取溶剂时的提取效率最高。