Synthesis and characterization of sustainable blue dyes: Enhancing diffusion on nylon fabrics with supercritical CO2 for eco-friendly dyeing methods

A very convenient method was developed to synthesize five dispersed anthraquinone dyestuffs using the readily available starting material 1,4-diaminoanthroquinone. This dye was prepared for coloration on nylon fabrics with supercritical carbon dioxide (ScCO2). All the synthesized dyes were character...

Full description

Saved in:
Bibliographic Details
Published inThe Journal of supercritical fluids Vol. 211; p. 106316
Main Authors Prabakaran, Kaliyan, Manivannan, Ramalingam, Son, Young-A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2024
Subjects
Anthraquinone
Color fastness
Nylon
Supercritical dyes
Waterless
Color fastness
Supercritical dyes
Waterless
Anthraquinone
Nylon
Online AccessGet full text

Cover

More Information
Summary:A very convenient method was developed to synthesize five dispersed anthraquinone dyestuffs using the readily available starting material 1,4-diaminoanthroquinone. This dye was prepared for coloration on nylon fabrics with supercritical carbon dioxide (ScCO2). All the synthesized dyes were characterized by 1H NMR, 13C NMR, and HRMS techniques. The UV-Vis absorbance measurements for all the dyes were carried out, and the results indicated that the absorption peak wavelength of the dyes was approximately 570–641 nm in the blue region. Further, these dispersed dyes were dyed on nylon fabrics with supercritical CO2. After dyed fabrics were tested, the color strength of K/S value and color fastness were tested using like washing, crocking, and sunlight. Additionally, it determines the sweat fastness of dyed nylon fabrics under acidic and basic conditions. The dyes are readily involved in the nucleophilic addition of amino (-NH2, nylon) functional groups to nylon fabrics in an alkaline medium. Therefore, our results showed that these dyes are commercially the most satisfactory, environmentally efficient dyes and practically exhibit sufficient color uniformity. [Display omitted] •Anthraquinone based dyes were synthesized for supercritical CO2 dyeing.•Color strength, and fastness tests were conducted for the dyed fabrics.•The synthesized dyes have unique waterless dyeing applications.•The dyes reacts in nylon fabrics through ether and amide linkages between them.
ISSN:0896-8446
1872-8162
DOI:10.1016/j.supflu.2024.106316