Dyeing of Cotton Fabrics with Novel Fluorescent Reactive Dyes Based on Fluorescein: Dyeing and Fluorescent Properties, Adsorption Isotherms, and Kinetic Studies

ABSTRACT

Fluorescent dyes can apply to prepare some high-visibility materials for safety garments. Reactive dyes have advantages, such as brilliant shades, suitable wet-fastness properties, and high daylight visibility. In this respect, we reported the dyeing properties of two synthesized fluorescent reactive dyes, namely mono-functional (D₁) and bifunctional (D₂), on cotton fabrics. The cotton fabrics were dyed in various concentrations of D₁ and D₂ at 80°C and 60°C, respectively. Results represented that D₁ and D₂ had good exhaustion on cotton fabrics with suitable fixation percentages. The experimental data of the dyeing of cotton fabrics with the used dyes were analyzed by the Langmuir, Freundlich, Temkin, and B.E.T isotherm models. The kinetic data were checked by pseudo-first-order, pseudo-second-order, Elovich, and intra-particle diffusion kinetic models. The results indicated that the isotherm and kinetic adsorption of dyes on cotton fabrics were fitted by the Freundlich isotherm and pseudo-second-order kinetic model. The dyed cotton fabrics had relatively medium light fastness (3–4) and good rubbing and washing fastness (4–5). The investigation of color characteristics and fluorescent properties of dyed cotton fabrics with fluorescent dyes showed that the reactive dyes had a yellow hue on cotton fabrics with good fluorescence intensity in concentration 5% o.w.f.

摘要

荧光染料可用于制备安全服装的高能见度材料. 活性染料具有色泽鲜艳、耐湿牢度好、日光能见度高等优点. 在这方面, 我们报道了两种合成的荧光活性染料, 即单官能团(D1)和双官能团(D2)在棉织物上的染色性能. 棉织物分别在80℃和60℃下以不同浓度的D1和D2进行染色. 结果表明, D1和D2在棉织物上有良好的上染力, 并具有合适的固色率. 用Langmuir、Freundlich、Temkin和B.E.T等温线模型分析了用所用染料染色棉织物的实验数据. 动力学数据通过伪一级、伪二级、elovich和粒子内扩散动力学模型进行检验. 结果表明, 染料在棉织物上的吸附等温线和动力学符合Freundlich等温线和拟二级动力学模型. 染色棉织物具有相对中等的耐光牢度(3-4)和良好的摩擦和洗涤牢度(4-5). 对荧光染料染色棉织物的颜色特性和荧光性能的研究表明, 在5%o.w.f.浓度下, 活性染料在棉织物上呈黄色, 具有良好的荧光

KEYWORDS:

• Fluorescent reactive dyes
• cotton
• dyeing
• fluorescent properties
• adsorption isotherm
• kinetic study

关键词:

• 荧光活性染料
• 棉
• 染色
• 荧光特性
• 吸附等温线
• 动力学研究

Disclosure statement

No potential conflict of interest was reported by the author(s).