Microwave-Supported Green Dyeing of Mordanted Wool Fabric with Arjun Bark Extracts

ABSTRACT

Sustainable extraction of functional colorant from dye-yielding plant through microwave radiations is gaining popularity due to its cost, time and effective nature. Current study is concerned with the microwave-assisted exploration of Arjun bark natural colorant for dyeing of mordanted wool fabric. Extracts obtained in various media were irradiated up to 6 min and were used to dye wool. It is found that acid methanol-solubilized extract (3 pH) from 4 g powder upon irradiation for 4 min has given darker shades onto irradiated wool at dyeing for 75 min. FTIR analysis shows that there is no change in chemical nature of functional site of wool, whereas SEM analysis shows that there are some morphological changes occurring at the surface. At optimal conditions, acceptable fastness characteristics are obtained, when 9% of turmeric extracts as pre- and post-bio-mordant and 5% of Fe as pre- and 3% of Fe as post-mordant is employed. It is concluded that microwave has not only improved the functional behavior of natural colorant from Arjun bark for wool dyeing but also the addition of green mordants has made dyeing process more esthetic.

摘要

利用微波辐射从染料生产装置中可持续提取功能性着色剂，由于其成本高、时间长、性质有效等优点，正受到人们的广泛关注.研究了微波辅助阿君树皮天然着色剂在羊毛织物媒染剂染色中的应用.在各种介质中提取的萃取物被辐照6分钟，并用于羊毛染色.结果表明，4g粉末经4分钟辐照后的酸-甲醇增溶萃取物（3ph）在染色75分钟时对辐照后的羊毛有较深的色度，红外光谱分析表明，羊毛功能部位的化学性质没有变化，而扫描电镜分析表明，在染色75分钟后，羊毛功能部位的形态发生了变化.在最佳条件下，采用9%的姜黄提取物作为前、后生物媒染剂，5%的铁作为前、后媒染剂，3%的铁作为后媒染剂，可获得可接受的染色性能。结果表明，微波不仅改善了阿君皮羊毛染色天然着色剂的性能，而且添加了绿色媒染剂，使染色过程更加美观.

KEYWORDS:

• Arjun bark
• bio-mordant
• FTIR
• microwave radiation
• SEM
• wool fabric

关键词:

• 阿氏树皮
• 生物媒染剂
• 微波辐射
• 毛织物

Acknowledgments

We are thankful to Mr. Zafar Iqbal, Manager, Noor Fatima Fabrics, Faisalabad, Pakistan and Mr. Muhammad Abbas, Chief Executive, Harris Dyes and Chemicals, Faisalabad, Pakistan for providing us the technical guidance at lab scale for smooth running of experiments with excellent results and for the facilities of fastener testers to conduct a part of PhD Studies.

Additional information

Funding

This work was supported by UNESCO under its scheme of PhosAgro/IUPAC Research grant in Green Chemistry for young scientists through its project UNESCO/IUPAC/GCUF [grant number 128].