羊毛低温等离子体处理后的染色性能研究

Research on dyeing properties of low temperature plasma treated wool fibers

采用低温氧等离子体技术处理羊毛 ,通过X射线光电子能谱仪分析了处理前后纤维表面元素组成 ,探讨了经氧等离子体分别处理 1、3、5、10和 15min后 ,羊毛的润湿性和染色性能的变化 .结果表明 ,低温氧等离子体处理使羊毛纤维表层的大分子链断裂 ,并有新的含氧的极性基团形成 ,增加了纤维表面的亲水性 ,润湿时间显著缩短 ;此外 ,低温氧等离子体处理导致鳞片表层胱氨酸的部分二硫键氧化断裂 ,羊毛纤维染色初始壁障被破坏 ,改善了染色性能 ,表现为上染速率和染色扩散系数提高及染色平衡时间缩短 。

The wool samples treated by low-temperature oxygen plasma (LTP), and the changes of elemental surface composited of wool fibers caused by LTP treatment are assessed by a X-ray photoelectric energy spectrometer (XPS), the wettability and dyeing properties of treated fibers are also investigated. XPS results show that an eroding and oxidizing effect is produced after the plasma treatment, much oxygen is incorporated on to the fiber surface in the form of new carboxylate functions, parts of disulphide groups (S-S) in keratin are cleaved due to the oxidation of cystine residues, eventually induce the increased wettability and diminished barrier effect at the start of wool dyeing. A higher dye uptake rate and increased diffusion coefficient of treated fibers are observed in the dyeing test, but the adsorption behavior keeps constant in the LTP modification.