在当前时间,生物着色剂的使用获得了公众的认可,作为合成着色剂的可持续替代品,从而减少了环境污染。本研究集中在绿色,安全,和清洁技术,用于从comblebur(XanthiumstrumariumL.)叶片中恢复天然着色剂并将其应用于棉织物。通过使用水性和碱性介质采用生态友好的微波辅助提取工艺来提取天然着色剂。棉织物的染色是使用辐照和未辐照的棉织物,辐照和未辐照的天然染料进行的。提取实验结果表明,与水性棉织物相比,4分钟微波辅助碱性提取物在微波处理棉织物上表现出显着的色强度。进一步研究棉织物的最佳染色条件,各种染色变量,如染色时间,染色温度,染料浓度,和排出剂进行了监测,发现使用染料浓度为45毫升的优越结果,用于在75°C下在4g/100ml食盐存在下将棉织物染色50分钟。为了改善颜色强度和色牢度性能,各种生物媒染剂的影响,比如桉树树皮,相思树皮,姜黄根茎,还有洋葱壳,还评估了染色棉织物上的化学媒染剂(铝和铜)。还观察到,使用生物媒染剂作为预媒染剂(4%金合欢,4%桉树,2%洋葱)和媒染剂(3%洋葱,3%桉树,4%金合欢)表现出最高的颜色强度和各种色调,对光具有可接受的色牢度性能,washing,与化学媒染剂相比,摩擦。用于牢度的ISO标准还显示,与化学媒染剂相比,生物媒染剂已经将等级从良好提高到优异。该结果为使用生物媒染剂从鸡冠叶中提取黄色天然染料以对织物进行生态友好着色提供了足够的范围。
During current times, the use of bio-colorants attained public acceptance as a sustainable alternative to synthetic ones which in turn reduced the environmental contamination. The present study focused on the green, safe, and clean technology for the resurgence of natural colorant from cocklebur (Xanthium strumarium L.) leaves and their application to cotton fabric. Natural colorants were extracted by employing an eco-friendly microwave-assisted extraction process using an aqueous and alkaline medium. Dyeing of cotton fabric was carried out using irradiated and unirradiated cotton fabric with irradiated and unirradiated natural dyes of cocklebur leaves. The results of extraction experiments revealed that 4 min microwave-assisted alkaline extract exhibited significantly outstanding color strength onto microwave-treated cotton fabric compared to aqueous one. Further to investigate the optimum dyeing conditions for cotton fabric, various dyeing variables such as dyeing time, dyeing temperature, dye concentration, and exhausting agent were monitored and found a superior result using a dye concentration of 45 ml, for dyeing cotton fabric at 75 °C for 50 min in the presence of 4 g/100 ml of table salt. For improvement in color strength and color fastness properties, the effects of various bio-mordants, such as eucalyptus bark, acacia bark, turmeric rhizome, and onion shells, and chemical mordants (aluminum and copper) on dyed cotton fabric were also evaluated. It was also observed that cotton fabric dyed with alkaline extract of cocklebur leaves using bio-mordants as pre-mordants (4% acacia, 4% eucalyptus, 2% onion) and post-mordants (3% onion, 3% eucalyptus, 4% acacia) exhibited the highest color strength and various hues with acceptable colorfastness properties against light, washing, and rubbing in comparison to chemical mordants. The ISO standard for fastness also revealed that bio-
mordanting has enhanced the rating from good to excellent in comparison to chemical mordants. The results provide ample scope for the extraction of yellow natural dye from the cocklebur leaves for eco-friendly coloration of fabrics using bio-mordants.