Effect of Low-Temperature Dyeing on Properties of Cashmere Fibers

ABSTRACT

The effect of different dyeing temperatures on the properties of cashmere fibers was characterized and discussed in detail in this research. The influence of dyeing processes on fiber morphology, mechanical properties and chemical characteristics was investigated by using FTIR, SEM, EDS, DFE, alkali solubility, etc. Due to dyeing, the mechanical properties and DFE of cashmere fibers decreased while the alkali solubility increased. The SEM images showed that the high-temperature dyeing caused greater damage to the fiber surface than that of the low-temperature dyeing, which was consistent with the test results of DFE and alkali solubility. The new bands at 1127 and 1042 cm-1 that appeared in FTIR clearly showed the destruction of disulfide bonds. Furthermore, EDS results substantiated that the different amounts of increase of sulfur on different dyed cashmere fibers. From the results obtained, it can be concluded that the change of dyeing temperature had obvious effect on the properties of cashmere fibers, and that the dyeing process at a lower temperature was very significant to reduce the cashmere fibers damage.

摘要

研究了不同染色温度对羊绒纤维性能的影响. 采用FTIR、SEM、EDS、DFE、碱溶性等方法研究了染色工艺对纤维形态、力学性能和化学性能的影响. 染色使羊绒纤维的力学性能和DFE降低，碱溶性增加. SEM图像显示，高温染色对纤维表面的损伤大于低温染色，这与DFE和碱溶性的测试结果一致. 在1127cm-1和1042cm-1处出现的新谱带清楚地显示了二硫键的破坏。EDS结果进一步证实了不同染色羊绒纤维硫含量的不同增加. 结果表明，染色温度的变化对羊绒纤维的性能有明显的影响，低温染色对减少羊绒纤维的损伤有重要意义.

KEYWORDS:

• Cashmere fibers
• dyeing temperature
• mechanical properties
• morphology
• FT-IR
• SEM-EDS

关键词:

• 羊绒纤维
• 染色温度
• 机械性能
• 形态学
• FT-IR
• SEM-EDS

Additional information

Funding

This work was supported by the National Key R&D Program of China under Grant [2017YFB0309200]; The Fundamental Research Funds for the Central Universities and Graduate Student Innovation Fund of Donghua University under Grant [CUSF-DH-D-2020030].