The Effect of Laser Radiation in Different Mordant and Ratios on Silk Fabrics Dyed with Weld (Reseda luteola L.)

ABSTRACT

In this study, the silk fabrics mordanted at the ratio of 1%, 5%, 10%, 20% of aluminum potassium sulfate (KAl(SO₄)₂·12H₂O) and 0.1%, 0.5%, 1%, 3%, of iron sulfate (FeSO₄) were separately dyed 50% weld (Reseda luteola L.). Then firstly, laser radiation was used on un-mordanted silk fabrics and as a second step, silk samples with different ratios mordanted and dyed with weld were irradiated to investigate the laser radiation effects on color using several combinations of the two main laser parameters namely energy density and number of pulses. Nd:YAG laser device was used two different wavelengths of 1064 nm and 532 nm, and it was found that the laser wavelength of 532 nm is most appropriate to all dyed fabrics, while 1064 nm wavelength causes damages such as discoloration and burning in the iron sulfate mordanted fabrics. Colorimetric analysis was performed to examine surface alterations of silk samples. The CIEL*a*b* color values of the silk fabrics were measured and compared with each other. In general, the use of iron sulfate (FeSO₄) as a mordant increased the color difference (ΔE*) of dyed fabrics at 1064 nm. The color coordinates and fastness values of rubbing and light were investigated. Morphological analysis was performed using optical and scanning electron microscopy. Elemental analysis was performed using SEM-EDX (scanning electron microscopy–energy-dispersive X-ray spectroscopy) to identify mordants. A reserved phase high-performance liquid chromatography (RP-HPLC) with the diode-array detection (DAD) method was utilized for the identification of the components of dyes present in the silk samples.

摘要

在本研究中, 丝织物以1%、5%、10%、20%的硫酸铝钾 (KAl(SO₄)₂·12H₂O) 硫酸铁 (FeSO) 的含量分别为0.1%、0.5%、1%、3%₄) 分别对50%焊缝进行染色 (Reseda luteola L.) . 然后, 首先对未经媒染的真丝织物进行激光辐照, 然后对不同比例的经媒染和焊缝染色的真丝样品进行辐照, 利用能量密度和脉冲数这两个主要激光参数的几种组合来研究激光辐射对颜色的影响. Nd:YAG激光装置使用了1064 nm和532 nm两种不同的波长, 发现532 nm的激光波长最适用于所有染色织物, 而1064 nm波长会导致硫酸铁媒染剂织物变色和灼伤. 进行比色分析以检查丝绸样品的表面变化. 对真丝织物的CIEL*a*b*颜色值进行了测量并相互比较. 通常, 使用硫酸铁 (FeSO₄) 作为媒染剂, 染色织物在1064nm处的色差 (ΔE*) 增加. 研究了摩擦和光照下的色坐标和牢度值, 并用光学显微镜和扫描电子显微镜进行了形态分析. 使用SEM-EDX (扫描电子显微镜-能量色散X射线光谱) 进行元素分析, 以识别媒染剂. 采用保留相高效液相色谱 (RP-HPLC) 和二极管阵列检测 (DAD) 方法对丝绸样品中的染料成分进行了鉴定.

关键词:

• 激光
• 辐射
• 焊接

KEYWORDS:

• Laser
• radiation
• weld
• HPLC
• CIEL*a*b*
• SEM-EDX