Terminalia arjuna Dyed Woolen Yarn - Effect of Binary and Ternary Metal Salt Combinations: A Greener Route for Production of Ecofriendly Textiles

ABSTRACT

Terminalia arjuna(Roxb.) Wight and Arn. (family: Combretaceae) is a large evergreen cardioactive plant drug available throughout India. The bark of T. arjuna is medicinally used as a tonic and is chemically characterized by the presence of tannins and related compounds with 20.0–24.0% tannin content. This research study investigates the use of barks of T. arjuna for the extraction of color components to develop natural and beautiful shades on wool with different hues and tones using binary and ternary metal salt combinations (aluminum potassium sulfate, ferrous sulfate, and stannous chloride). The dyeing was carried by exhaustion method and dyed samples were analyzed using a reflective spectrophotometer in terms of CIELAB (L*, a*, and b*) and color strength (K/S) values. Wash and light fastnesses were investigated according to (International Organization for Standardization)ISO standards. pH has marked effect on the K/S values of dyed woolen yarn. The results showed that overall 54 different shades having good to very good fastness properties were produced by control dyeing (un-mordanted) and the use of different metallic salt combinations in dyeing of wool using T. arjuna bark extract as a source of natural dye.

摘要

TerminaliaArjuna（Roxb.）Wight和Arn.（科：梳齿科）是一种大型的常绿有氧植物药物，在印度各地都有售。T.arjuna的树皮，药用作补药，化学特征是含有20.0-24.0%的单宁和相关化合物.本研究以二元及三元金属盐组合（硫酸铝钾、硫酸亚铁、氯化亚锡）为研究对象，探讨了利用T.arjuna树皮提取毛色组分，在不同色调和色调的羊毛上形成自然美丽的色泽.采用排气法染色，用反射分光光度计对染色样品进行CIELAB（L*、A*和B*）和K/S值分析.根据I.S.O.标准对洗涤和光快速性进行了调查。pH值对染色毛纱的色强值有显著影响.结果表明，以T.arjuna树皮提取物为天然染料来源，通过控制染色（未改性）和不同金属盐组合在羊毛染色中的应用，共产生54种具有良好到非常好染色性能的色光。

KEYWORDS:

• Terminalia arjuna
• pre-mordanting
• dyeing
• ecofriendly
• colorimetric properties
• fastness properties

关键词:

• 预媒染
• 染色
• 生态友好
• 色度特性
• 耐用性

Acknowledgments

Financial support provided by Southwest University, Chongqing, China through ‘Postdoctoral Fellows at Southwest University’ for Luqman Jameel Rather is highly acknowledged.