Optimized Dyeing of Cotton with semi-synthetic Embelin Ninhydrin Dye Obtained by Chemical Modification of Embelin from Embelia Schimperi

ABSTRACT

Chemical modification is a promising path to address the limitations of a natural dye, such as limited shades and inadequate fastness properties. This study investigated the modification of embelin (2, 5-dihydroxy-3-undecyl-1, 4-benzoquinone) a plant-based benzoquinone compound from Embelia schimperi (Myrisinaceae family) with ninhydrin to get a semi-synthetic dye. The modified dye was applied to cotton fabric along with mordants to provide different shades. Optimum dyeing conditions were determined using Central Composite Design which showed optimum conditions of pH at 9, time of 60 min and temp of 80°C. The color fastness ratings were in the range of 4–5 evaluated on the Gray scale.

摘要

化学改性是解决天然染料的局限性 (如色度有限和牢度不足) 的一条很有前景的途径. 本研究探讨了用茚三酮对来自杨梅科的植物基苯醌化合物embelin (2, 5-二羟基-3-十一烷基-1, 4-苯醌) 进行改性以获得半合成染料. 改性染料与媒染剂一起应用于棉织物, 以提供不同的色度. 采用中心复合设计法确定了最佳染色条件, 结果表明, 最佳染色条件为pH值为9, 时间为60分钟, 温度为80°C. 根据灰度评估, 色牢度等级在4-5范围内.

KEYWORDS:

• Chemical modification
• embelin ninhydrin
• optimization
• colourfastness
• response surface
• color strength

关键词:

• 化学改性
• 恩贝林茚三酮
• 优化
• 色牢度
• 响应面
• 颜色强度

Research highlights

• The study introduced semi-synthetic embelin ninhydrin as a dye for the first time and its application as a dye to cotton fiber for the first time.

• The study investigated use of different mordants with embelin ninhydrin dye which gave different shades with cotton fabric and had good fastness properties (4–5) on the Grey scale for the first time

• The study came up with an optimized model of dyeing cotton fabrics with embelin ninhydrin dye at optimum values of pH 9, temperature of 80 ^oC and time of 60 min for the first time.

Acknowledgments

This work was supported by the World Bank and the Inter University Council of East Africa through the Africa Center of Excellence II in Phytochemicals, Textile and Renewable Energy at Moi University, Kenya, which led to this research article. Margaret C. Koske is grateful to the Egerton University, Kenya, for the leave granted which made this research a success.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/15440478.2022.2107143

Additional information

Funding

This work was supported by the World Bank and the Inter University Council of East Africa through the Africa Center of Excellence II in Phytochemicals, Textile and Renewable Energy (ACE II PTRE) at Moi University, Kenya [IDA Credit no-5798-KE].