Microwave Assisted Modulation of Vat Dyeing of Cellulosic Fiber: Improvement in Color Characteristics

ABSTRACT

The role of radiations in textile processing is gaining attention due to its low cost, energy effectiveness and eco-friendly process. This study is concerned with the improvement in modulation of microwave assisted vat dyeing of cellulosic fiber. It was found that radiation treatment of both cotton fabric and dye solution for 1 min gives good color strength, while for redox reaction, 2.5 g of NaHSO₃, 2 mL of CH₃COOH, and 1.5 mL of H₂O₂ are the optimized conditions which show it is a cost-effective tool. Good color strength was obtained at 65 °C for 1 h dyeing using 50 mL of optimal solution in dye bath at pH 9. Finally, ISO standards for color fastness to light, washing, rubbing and perspiration were applied at 0.5–2.5% of shade at optimal conditions which showed that microwave treatment has enhanced the color characteristics. Hence, the technique can successfully and easily be employed for surface modification of fabric for good quality dyeing with various classes of dyes.

摘要

辐射在纺织加工中的作用越来越受到重视，因为它的低成本，能源效率和环境友好的过程。本文研究了微波辅助纤维素纤维还原染色的工艺改进。结果发现，1分钟是棉质织物和染料溶液放射治疗提供了良好的色彩强度，而氧化还原反应、2.5g NaHSO₃，2ml CH₃COOH，和1.5mL,H₂O₂的条件优化，表明它是一个具有成本效益的工具。在pH为9的染液中，用50ml的最佳溶液在1h染色时，获得了良好的着色强度。最后，在最佳条件下，在0.5～2.5%的色光条件下，对色光、洗涤、摩擦、汗渍等色牢度进行了ISO标准处理，表明微波处理提高了颜色特征。因此，该技术可以成功地、方便地用于织物的表面改性，用于各种染料的优质染色。

KEYWORDS:

• colorfastness
• cotton
• irradiation
• microwave
• spectra flash sf 600
• vat dyes

关键词:

• 色牢度
• 棉花
• 辐射
• 微波
• 光谱闪光SF 600
• 还原染料

Acknowledgments

We are also thankful to Mr. Zafar Iqbal Manger QA & QC of Noor Fatima Textile (Pvt.) Limited, Faisalabad Pakistan and Mr. Muhammad Abbas Director Harris Dyes and Chemical (Pvt.) Limited, Faisalabad for providing the technical assistance and implementation of the work at industrial scale.

Funding

We are grateful to Higher Education Commission of Pakistan (HEC) for funding the project (No. 20-2724/NRPU/R&D/HEC/12/6828).

Additional information

Funding

We are grateful to Higher Education Commission of Pakistan (HEC) for funding the project (No. 20-2724/NRPU/R&D/HEC/12/6828).