Journal of Industrial and Engineering Chemistry ( IF 6.1 ) Pub Date : 2021-08-05 , DOI: 10.1016/j.jiec.2021.07.048 Aming Wang 1, 2 , Feng Liu 1 , Liangjun Xia 2, 3 , Chunhua Zhang 2, 4 , Sijie Zhou 2 , Zhuan Fu 2 , Yunli Wang 2 , Weilin Xu 2
Severe effluent pollution and chemical damage to protein fibers generated from conventional aqueous dyeing process have stimulated interest in exploiting sustainable dyeing of wool. Herein, an ethanol (EtOH)-carbon tetrachloride (CCl4)-water (H2O) ternary solvent system was used as the dyeing medium to protect wool fibers from being damaged in the dyeing process. The wool fibers were firstly pretreated in an aqueous acid solution, followed by dyeing in the EtOH-CCl4-H2O (45:50:5) ternary solvent system with reactive dyes. The results indicated that the acid pretreatment solution could be reused for several times, the samples dyed in the EtOH-CCl4-H2O mixture with the investigated dyes showed higher K/S values compared to the conventional approach, implying the increased dye utilization and decreased effluents discharge were realized. Furthermore, acceptable permeability, good colorfastness, and satisfactory leveling properties of the dyed samples were achieved using the developed method. Additionally, the solvent-assisted dyed samples showed improved mechanical properties compared with the conventionally dyed samples. The dyeing mechanisms of wool fibers in the EtOH-CCl4-H2O mixture were illustrated in detail. The proposed dyeing technology consumes fewer energy, freshwater, and chemicals compared with the conventional wool dyeing method. Future work will principally concentrate on the reuse of the dye-contaminated EtOH-CCl4-H2O mixture.
中文翻译:
在三元溶剂系统中用活性染料对羊毛纤维进行溶剂辅助染色,以保护纤维免受损伤
传统水性染色工艺产生的严重废水污染和对蛋白质纤维的化学损伤激发了人们对开发可持续羊毛染色的兴趣。本文采用乙醇(EtOH)-四氯化碳(CCl 4)-水(H 2 O)三元溶剂体系作为染色介质,保护羊毛纤维在染色过程中不受损伤。羊毛纤维首先在酸性水溶液中进行预处理,然后在 EtOH-CCl 4 -H 2 O (45:50:5) 三元溶剂体系中用活性染料染色。结果表明酸预处理液可多次重复使用,样品在EtOH-CCl 4 -H 2与传统方法相比,O 与所研究染料的混合物显示出更高的K/S值,这意味着实现了染料利用率的提高和废水排放的降低。此外,使用开发的方法实现了染色样品的可接受的渗透性、良好的色牢度和令人满意的匀染性。此外,与传统染色样品相比,溶剂辅助染色样品显示出更好的机械性能。羊毛纤维在EtOH-CCl 4 -H 2 中的染色机理O 混合物进行了详细说明。与传统的羊毛染色方法相比,所提出的染色技术消耗更少的能源、淡水和化学品。未来的工作将主要集中在被染料污染的 EtOH-CCl 4 -H 2 O 混合物的再利用上。