蚕丝织物的栀子蓝色素染色

为解决蚕丝织物的天然染料染色缺少蓝色的问题,丰富天然染料染色蚕丝织物的色谱,用栀子蓝色素对蚕丝织物染色,研究了染色工艺对上染百分率的影响,依据栀子蓝色素上染蚕丝织物的上染速率曲线及吸附等温线分别研究了其染色动力学和染色热力学。得到栀子蓝色素上染蚕丝织物的最佳工艺为:染色pH值3,染色时间50 min,染色温度60 ℃。在60 ℃,pH值为3条件下染色,染色吸附过程符合准二级动力学模型,为化学吸附,吸附等温线为朗缪尔型,为定位吸附。据此计算,得到栀子蓝色素上染蚕丝织物的染色饱和值为 97.465 9 g/kg。

Silk fabric dyed with gardenia blue pigment

Facing the problem that silk fabrics dyed with natural dyes has insufficient blue color, gardenia blue was used in dyeing silk fabrics as an attempt to enrich the chromatogram of silk fabrics dyed with natural dyes. The effects of the dyeing process on dye uptake was studied, and dyeing kinetics and dyeing thermodynamics of silk fabrics dyed with gardenia blue were studied according to the dyeing rate curve and adsorption isotherm respectively. The results show that the optimum dyeing condition is dyeing at pH=3 and 60 ℃ for 50 min. When dyeing at pH=3 and 60 ℃, the adsorption of pigments to silk fabrics responds to the quasi-second-order kinetic, indicating chemical adsorption. The adsorption isotherm conforms to Langmuir-type adsorption isotherm, suggesting a localized adsorption. The dyeing saturation value of gardenia blue dyeing silk is 97.465 9 g/kg according to Langmuir's adsorption isotherm formula.