Department of Textile Printing, Dyeing and Finishing, Faculty of Applied Arts, Damietta University, Damietta, 34512, Egypt.
Department of Material Art, Galala University, Galala, 43713, Egypt.
Sci Rep. 2022 May 24;12(1):8789. doi: 10.1038/s41598-022-12680-w.
Polypropylene fibres are difficult to dye using commonly used techniques due to the high crystallinity and non-polar aliphatic structure, that lack reactive places for dyes in the molecule. Dyeing PP fabric in scCO with antibacterial dyes merged the dyeing and finishing methods, resulting in a more productive technique in terms of water and energy consumption. Unmodified polypropylene fabric was dyed with 4-[2-[4-(ethenylsulphonyl)phenyl]diazenyl]-N,N-diethylbenzenamine antibacterial dye under scCO medium. The influences of scCO working parameters, such as dye concentration, pressure, dyeing time, and temperature, on fabric dye absorption expressed as color strength were studied. The color strength (K/S) was measured as well as CIELAB color parameters. The results were compared with its water dyeing analogue and it was observed that color strength as well as color depth (L) of the samples dyed in scCO were noticeably better than its water counterpart. In both scCO and water, the fastness properties (washing, rubbing, and light) of the dyed samples were excellent. Antibacterial activity of the dyed polypropylene sample in scCO was estimated and the results indicated good antibacterial efficiency.
聚丙烯纤维由于高结晶度和非极性脂肪族结构，缺乏分子中用于染料的反应性位置，因此很难用常用技术进行染色。在 scCO2 中用抗菌染料对 PP 织物进行染色和整理合并了染色和整理方法，在水和能源消耗方面更具生产效率。未改性的聚丙烯织物在 scCO2 介质中用 4-[2-[4-(乙烯基磺酰基)苯基]偶氮]-N,N-二乙基苯胺抗菌染料进行染色。研究了 scCO2 工作参数（如染料浓度、压力、染色时间和温度）对织物染料吸收（表示为颜色强度）的影响。测量了颜色强度（K/S）和 CIELAB 颜色参数。将结果与水染色的类似物进行了比较，观察到在 scCO2 中染色的样品的颜色强度以及颜色深度（L）明显优于其水对应物。在 scCO2 和水中，染色样品的牢度性能（洗涤、摩擦和光照）都非常出色。在 scCO2 中评估了染色的聚丙烯样品的抗菌活性，结果表明具有良好的抗菌效率。
