Effect of Binary and Ternary Combination of Metal Salt on Colorimetric and Fastness Characteristics of Acacia Nilotica Dyed Woolen Yarn

ABSTRACT

Acacia nilotica

an important medicinal plant of topical and sub-tropical regions belonging to family Fabaceae of genus Acacia is a source of many active phytochemicals (secondary metabolites) have been explored to study their useful utilization in different fields. The versatile utility of this plant as a source of timber, a source of fodder, tannin, and gum, and fuel has prompted researchers to deepen investigations for full utilization of this plant. To exploit its use as a colorant for textiles, this research study investigates for the first time pre-mordanting of wool with binary and ternary metal salt combinations using aluminum potassium sulfate, ferrous sulfate, and stannous chloride mordants in order to develop natural and beautiful shades on wool with different hue and tone. The dyeing was carried by exhaustion method and dyed samples were analyzed using a reflective spectrophotometer in terms of CIELab and CIELch (L*, a*, b*, c*, and h°) and K/S values. Wash and light fastnesses were investigated according to ISO standards. Wool samples pre-mordanted with ferrous sulfate-stannous chloride (neutral medium) displayed the highest color strength value of 11.22 followed by ferrous sulfate-alum and alum-stannous chloride combinations. Statistical analysis of color parameters confirms the synergetic role of individual metal salts in different combinations. The results showed that 36 different shades having good to very good fastness properties were produced by the use of different metallic salt combinations in the natural dyeing of wool using A. nilotica bark extract as dye.

摘要

尼罗相思是亚热带和热带地区重要的药用植物，属于相思属豆科植物，是许多活性植物化学物质（次生代谢产物）的来源.这种植物作为木材、饲料、单宁和树胶以及燃料来源的多种用途促使研究人员加深对这种植物的研究，以便充分利用它.为了开发其作为纺织品着色剂的用途，本研究首次以硫酸铝钾、硫酸亚铁和氯化亚锡为媒染剂，采用二元和三元金属盐组合对羊毛进行预媒染，以开发不同色调、色调的羊毛上自然而美丽的色调.用穷举法进行染色，用反射光谱光度计对染色样品进行CIELab、CIELch(L*、a*、b*、c*、h°) 和 K/S 分析.根据 I.S.O 标准对洗涤牢度和耐光牢度进行了研究.用硫酸亚铁氯化亚锡(中性介质)预媒染的羊毛样品显示出最高的颜色强度值11.22，其次是硫酸亚铁明矾和明矾氯化亚锡组合.颜色参数的统计分析证实了金属盐在不同组合中的协同作用.结果表明.结果表明，以尼罗地亚相思树皮提取物为染料，采用不同的金属盐组合对羊毛进行天然染色，可得到36种牢度性能优良至极佳的色系。

KEYWORDS:

• Acacia nilotica
• pre-mordanting
• dyeing
• ecofriendly
• fastness properties
• colorimetric properties

关键词:

• 尼罗地亚相思
• 预媒染
• 染色
• 生态环境
• 紧固性
• 比色性质

Acknowledgments

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