Shrwardi Md Hossain Shahid, Das Shohag Chandra, Mamun Md Abdullah Al
Department of Wet Processing Engineering, Bangladesh University Of Textiles, Bangladesh, Tejgaon, 1208, Dhaka.
Department of Dyes and Chemical Engineering, Bangladesh University of Textiles, Bangladesh, 1208, Tejgaon, Dhaka.
Heliyon. 2023 Sep 1;9(9):e19663. doi: 10.1016/j.heliyon.2023.e19663. eCollection 2023 Sep.
This study focuses on an eco-friendly approach to vat dyeing of cotton fabric using natural reducing agents and compare their performance with a conventional reducing agent. Natural reducing agents derived from pineapple barks, watermelon, and carambola extracts were investigated as alternatives. The reduction potential and FTIR of these natural extracted reducing agents were evaluated to assess their dyeing capability. Different colorimetric properties, color strength, colorfastness, bursting strength and pilling resistance of the dyed fabrics were analyzed. The environmental impact of the dyeing process was assessed by measuring parameters such as BOD, COD, TDS, DO and pH values. The results indicated that the natural reducing agents exhibited comparable reduction potential to sodium dithionite. Colorimetric analysis revealed that the optimal concentrations of the reducing agents for dyeing were 500-600 ml/l. The carambola extract showed the best colorimetric properties among the three reducing agents tested. The study demonstrates the potential of natural reducing agents as eco-friendly alternatives for vat dyeing of cotton fabric, contributing to sustainable and green textile dyeing processes.
本研究聚焦于一种使用天然还原剂对棉织物进行还原染料染色的环保方法，并将其性能与传统还原剂进行比较。研究了源自菠萝皮、西瓜和杨桃提取物的天然还原剂作为替代物的情况。对这些天然提取的还原剂的还原电位和傅里叶变换红外光谱进行了评估，以评估它们的染色能力。分析了染色织物的不同比色特性、色强度、色牢度、破裂强度和抗起球性。通过测量生化需氧量、化学需氧量、总溶解固体、溶解氧和pH值等参数评估了染色过程对环境的影响。结果表明，天然还原剂表现出与连二亚硫酸钠相当的还原电位。比色分析表明，用于染色的还原剂的最佳浓度为500 - 600毫升/升。在所测试的三种还原剂中，杨桃提取物表现出最佳的比色特性。该研究证明了天然还原剂作为棉织物还原染料染色的环保替代物的潜力，有助于实现可持续和绿色的纺织品染色工艺。
