Textiles Dyeing with Pomegranate (Punica granatum) Peel Extract Using Natural Mordant

ABSTRACT

Agricultural waste represents a potential source of raw materials as natural dyes. The peel from pomegranate (Punica granatum) is a waste product, it is used in the textiles industry as dye. The objective of the study is to improve dyeing properties of pomegranate peel dyed silk fabric. We analyzed the pigment composition of pomegranate peel extract through ultraviolet-visible and Fourier-transform infrared (FTIR) spectroscopy; evaluated natural mordants and metallic mordants on fabrics dyed with pomegranate peel extracts by testing the K/S value, color characteristics, and color fastness; examined the morphology of dyed fabrics before and after color fixing treatment by scanning electron microscopy. The major pigment component in pomegranate peel is ellagic acid. An orthogonal array experiment revealed that the optimum dyeing conditions were pH 9, 60°C 60 min for silk fibers. Under the natural mordant, the K/S value of dyed fabric could acquire maximum (8.70). Moreover, the K/S value and color fastness of dyed fabrics could be further enhanced to 11.74 and level 5 by color-fixing treatment of natural gum rosin. Overall, the dyed silk samples with pomegranate peel represented good dyeing properties with natural mordant and natural color-fixing agent of gum rosin.

摘要

农业废弃物是作为天然染料的原料的潜在来源. 石榴皮是一种废物，在纺织工业中用作染料. 本研究旨在改善石榴皮染色丝绸织物的染色性能. 通过紫外-可见光谱和傅立叶变换红外光谱对石榴皮提取物的色素成分进行了分析; 通过测试K/S值、颜色特性和色牢度，评估石榴皮提取物染色织物的天然媒染剂和金属媒染剂; 用扫描电镜观察染色织物固色剂处理前后的形态变化. 石榴皮中的主要色素成分是鞣花酸. 正交试验表明，丝绸纤维的最佳染色条件为pH值9，60°C的60 min. 在天然媒染剂作用下，织物的K/S值达到最大值（8.70）. 天然松香固色处理可使织物的K/S值和色牢度进一步提高到11.74和5级. 总体而言，石榴皮染色丝绸样品在天然媒染剂和天然固色剂松香的作用下表现出良好的染色性能.

KEYWORDS:

• Plant dye
• pomegranate peel
• natural mordants
• dye-fixing agent
• silk fabric
• color properties

关键字:

• 植物染料
• 石榴皮
• 天然媒染剂
• 染料固色剂
• 丝绸面料
• 颜色属性

Acknowledgments

The authors would like to acknowledge the support of Minzu University of China and Kunming Institute of Botany for this project.

Disclosure statement

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

Additional information

Funding

This study was supported by the National Nature Science Foundation of China (project ID: 31670340 and 31970357), the Strategic Priority Research Program of Chinese Academy of Sciences (project ID: XDA20050204, XDA19050301, and XDA19050303) and Yunnan Province Science and Technology Department of building Science and Technology Innovation Center for South Asia and Southeast Asia (No. 202203AP140007).