Computational and experimental study of heterofunctional azo reactive dyes synthesized for cellulosic fabric

Siddiqua, Umme Habibah; Irfan, Muhammad; Ali, Shaukat; Sahar, Anum; Khalid, Muahmmad; Mahr, Muahmmad Shabir; Iqbal, Javed

doi:10.1016/j.molstruc.2020.128753

Cited by 16 publications

(6 citation statements)

References 24 publications

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“…All dyes had good rubbing fastness which may be imputed to be due to good dye-fiber bond stability and the well dye penetration into the towel. 39 It was observed that the conventional and alternative washings did not cause significant changes in the rubbing fastness, but the wet rubbing values of the alternative washings were 1/2 point lower than the dry ones. This situation could be explained by the dye molecules carried by repeated washing baths remain on the fiber surface or by the dye molecules are attached to the fibers by weak bonds.…”

Section: Absorbance-transmittance Values Of Washing Baths and Fastnes...mentioning

confidence: 94%

Environmentally Friendly Reactive Washing Process: A Case Study

Toprak-Cavdur

Aniş

Çalışkan

2022

AATCC Journal of Research

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Available and clean water resources in the world are decreasing day by day. Textiles is one of the industries that are consuming the highest volumes of water. For this reason, it is necessary to develop environmentally friendly textile processes within the scope of sustainability. Reactive dyeing is followed by a washing process consisting of many steps to remove unfixed/hydrolyzed dyes, which is the most preferred dyeing in the coloring of cotton products. A high amount of water is consumed in these processes. In this study, an alternative washing process was developed instead of the conventional reactive washing process. The baths, which were decided to be used according to the transmittance values of the washing baths after dyeing in light, medium, and dark shades, were used again as the first two baths of the next washings. Alternative washing did not have a negative effect on the quality parameters, namely washing and rubbing fastnesses. As a result, it was observed that the last two baths of the washing cycle could be used as the first two baths of the next washing cycle. In this case, it was predicted that approximately 40%−50% water savings could be achieved.

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Section: Absorbance-transmittance Values Of Washing Baths and Fastnes...mentioning

confidence: 94%

Environmentally Friendly Reactive Washing Process: A Case Study

Toprak-Cavdur

Aniş

Çalışkan

2022

AATCC Journal of Research

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“…The fastness was tested using crock meter (10 strokes to & fro) (Atlas) AATCC-1961. The percentage of exhaustion and fixation of dyes on the polyester fabric was determined by following the reported method [20,21].…”

Section: Synthesis Of (E)-(5-hydroxy-6-((4hydroxythiazol-2-yl)diazenyl)thiazolo[23-c] [124] Triazol -3-yl)(phenyl)methanone (Vii) and (E)mentioning

confidence: 99%

Synthesis and Characterization of New Azo Dyes Based on Thiazole and Assess the Biological and Laser Efficacy for Them and Study their Dyeing Application

et al. 2021

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The aim of this work describes the synthesis of disperse dyes in the derivative of 2-amino -4-hydroxy thiazole, which can be used as dyes for polyester fabrics with orange and red color They were obtained by preparing, (2-amino-4hydroxy-thiazole), then the latter compound was diazotization and couplings to produced (compound III and IV), Which were introduced by another coupling with diazonium salt of compound I diazotization to synthesize disperse (VII,VIII). The synthesized heterocyclic and synthesized dyes were studied by UV Spectroscopy, FT-IR, 1 H-NMR and 13 C-NMR. The substituted dyes Penetrate with good depth on polyester fabrics with a shade of orange and red colors, respectively. That increase heteroatoms and the conjugation in the dyes structure lead to high redshifts and the brightness of shades, color stability is high and fastness properties. The antibacterial activities were studied against different kinds of bacteria, namely Eschershia coli and Klebsiella Pneumonia Gram (-) ve, Staphylococcus aureus and Staphylococcus epidermidis Gram (+) ve. In addition, evaluation of laser efficacy was showed for the compounds (I,III,IV,VII,VIII) were radiated by laser for (10, 20, 30) seconds, It was observed that the prepared compounds were not affected and did not polymerize or degradation when measuring melting point and color.

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“…These dyes were synthesized in our previous study. 20 25:1 of dye liquor to fabric ratio and 2% dye shade was used throughout the dyeing process. Distilled water was used for making dye solutions.…”

Section: Dyeing Proceduresmentioning

confidence: 99%

Hetero-functional azo reactive dyes applied on cellulosic fabric and dyeing conditions optimization to enhance the dyeing properties

Siddiqua

Ali

Muzaffar

et al. 2021

Journal of Engineered Fibers and Fabrics

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New dyestuff moieties are introduced in the textile industry to upgrade the quality and aesthetic properties of dyed fabric. To contribute to this research endeavor, the current project was conducted for the dyeing of cellulosic fabric via new hetero-functional reactive dyes R1 and R2 synthesized in our previous study. Optimization of different process variables (temperature, salt, and alkali concentration) and their interactive study for exhaust dyeing was explored and delineated based on a statistical tool response surface methodology. Results divulged that both dyes displayed maximum exhaustion and fixation at a temperature of 61.50°C on the cellulosic fabric. Reactive dye R1 exhibited 87.62 (±3) exhaustion and 82.85 (±3) fixation percentage at their optimum salt (29.07 g/L) and alkali (32.55 g/L) dosage while R2 displayed 81.50 (±3) exhaustion and 77.21 (±3) fixation at its optimized salt (32.55 g/L) and alkali concentrations (22.84 g/L). All process variables showed a positive and synergistic effect on the dyeing properties. Enhanced exhaustion and fixation percentage of R1 as compared to R2 may be accredited to greater planarity and less steric hindrance of R1. Both dyes presented superb color buildup showing good to excellent color fastness on cotton fabric. Future perspectives of the current study comprised the application and assessment of dyeing parameters of these new reactive dyes on polyester cotton (PC) fabric.

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Computational and experimental study of heterofunctional azo reactive dyes synthesized for cellulosic fabric

Cited by 16 publications

References 24 publications

Environmentally Friendly Reactive Washing Process: A Case Study

Environmentally Friendly Reactive Washing Process: A Case Study

Synthesis and Characterization of New Azo Dyes Based on Thiazole and Assess the Biological and Laser Efficacy for Them and Study their Dyeing Application

Hetero-functional azo reactive dyes applied on cellulosic fabric and dyeing conditions optimization to enhance the dyeing properties

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