Abstract

The eco-sustainable natural dyes and their application are increasing due to the control of pollution, biological protection and easy application. In this study, Marigold natural dye was extracted from the flowers of the indigenous crop and applied onto cotton fabric by ultrasound-assisted dyeing method. In the first stage, the extraction of natural dye was optimized. Afterward, mercerized cotton fabric was dyed with the extracted Marigold dye. The dyed fabrics produced yellow shades onto cotton substrate. Higher colored yields of the dyed fabrics up to the value of 25 and acceptable colorfastness were achieved at optimized conditions. However, dyeing by pre-mordanting method, washing fastness was marginally improved. Comparing conventional and ultrasound dyeing methods, savings in amount of water (around 16%), thermal energy (for lesser dyeing temperature) and salt concentration (around 14%) required for ultrasound dyeing were notable. Also, representative wastewaters showed around 30% reduction in the total dissolved solids contents. Additionally, tensile strength, stiffness and surface morphology of the dyed fabrics were also assessed and found acceptable.

摘要

由于控制污染，生物保护和易于使用，生态可持续的天然染料及其应用正在增加。在这项研究中，万寿菊天然染料是从本地农作物的花朵中提取的，并通过超声辅助染色方法应用于棉织物上。在第一阶段，对天然染料的提取进行了优化。然后，用提取的万寿菊染料将丝光棉织物染色。染色的织物在棉质底材上产生黄色阴影。在最佳条件下，染色织物的着色率更高，最高可达25，并具有可接受的色牢度。但是，采用媒染法染色后，水洗牢度有一定程度的提高。比较传统和超声波染色方法，可节省水量（约16％），超声波染色所需的热能（用于较低的染色温度）和盐浓度（约14％）是值得注意的。而且，代表性废水显示总溶解固体含量减少了约30％。另外，还评估了染色织物的拉伸强度，刚度和表面形态，并且发现是可接受的。