Studies on the Dyeing Of Wool and Nylon Fabrics with Some Acid Dyes

Musa, Haruna

doi:10.9790/5736-0511117

Cited by 12 publications

(10 citation statements)

References 5 publications

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“…Increase in the concentration of citric acid therefore diminished acid dye colour yield on nylon fabric because it affected dye substantivity. The mechanism of nylon fabric dyeing with acid dye in an acidic medium is illustrated in Figure 4 [14].…”

Section: Resultsmentioning

confidence: 99%

Inhibitive Effect of NaCl and Citric Acid on the Colour Yield of Acid Dye on Nylon Fabric

Nnorom¹,

Anyanwu²,

Oguzie³

et al. 2020

JTST

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Nylon 6 fabric was dyed with C.I. Acid Yellow 23 at a temperature 50˚C using sodium chloride (NaCl) and citric acid as auxiliaries. The adsorption kinetic mechanism was studied using two models. Results of the UV-Vis spectroscopy indicated that colour yield of C.I. Acid Yellow 23 reduced when more than 1% (acid) and 5% (salt) concentration were used respectively for dyeing. NaCl however had the most inhibitive effect on the dye colour yield. The adsorption kinetics mechanism result fitted the pseudo-second-order-kinetic model with R 2 of 0.993.

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Section: Resultsmentioning

confidence: 99%

Inhibitive Effect of NaCl and Citric Acid on the Colour Yield of Acid Dye on Nylon Fabric

Nnorom¹,

Anyanwu²,

Oguzie³

et al. 2020

JTST

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“…Tables 6 and 7, which show that all the dyes had good to excellent rubbing fastness values of grades 4 and 5, implying very good results using the greyscale method, but polymeric dyes were found to have excellent fastness to rubbing in comparison to monomeric and commercial disperse dyes. This performance may be due to adequate dye absorption and fixation on the fibers using both high temperature and carrier dyeing methods [28].…”

Section: Fastness To Rubbingmentioning

confidence: 99%

“…However, the fibers treated with polymeric dyes were found to have excellent fastness to washing. This might be attributed to their fixing ability on the fabrics hence the dye molecules are absorbed onto the matrix of the fiber and remain fixed due to covalent and hydrogen bonding that exists between the dye molecules and the fiber [28].…”

Section: Fastness To Washingmentioning

confidence: 99%

“…The presence of electron-withdrawing groups in the proximity of the azo group and the formation of high molecular weight leading to the intermolecular hydrogen bonding may be responsible for the light fastness. Generally, the result reveals that polymeric dyes have higher fastness or resistance external agencies compared to monomeric dyes and commercial disperse dyes, this improvement of fastness properties is a result of the formation of long polymer conjugation which makes the polymeric dyes be fixed on the fiber-matrix [28]. Moreover, the carrier dyeing technique was found to be the best method for dyeing nylon and polyester with polymeric dyes [22,29].…”

Section: Fastness To Lightmentioning

confidence: 99%

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Facile synthesis and dyeing performance of some disperse monomeric and polymeric dyes on nylon and polyester fabrics

Abdullahi¹,

Musa²,

Habibu³

et al. 2022

Bull. Chem. Soc. Eth.

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ABSTRACT. Monoazo disperse polymeric dyes consisting of polyarylazocarboxybenzene-formaldehyde (PACB-F) and polyarylazohydroxynaphthalene-formaldehyde (PAHN-F) were synthesized through diazotisation, coupling and polycondensation reactions in the presence of formaldehyde and aqueous oxalic acid. The structure of the as synthesised dyes was acquired using UV-visible absorption maxima and FT-IR spectroscopy and their color, yield, melting point, solubility, and viscosity determined via standard methods. UV-visible and FTIR results showed successful formation of the polymeric dyes due to shift of wavelength of maximum absorption (λmax) (420-470 nm, 460-510 nm) and new absorption peak at around (2800-2995 cm-1) for methylene bridge, respectively. The yield of the monomeric dyes was 67.1-85.7% and polymeric 45.1-59.3%, melting point was 104.1-131.2 oC, and 136.0-143.5 oC, respectively. They are soluble in acetone, ethanol, and methanol and insoluble in n-hexane and water. The dyeing process was achieved via high temperature and carrier dyeing techniques on nylon and polyester fibers. The dyeing characteristics of the synthesised dyes were analyzed in comparison with commercial disperse dyes (terasil brilliant violet and terasil scarlet brown). The dyeing produced a very attractive hue brown shades with good to excellent washing, light, hot pressing, and rubbing fastness. KEY WORDS: Carbocyclic, Dyeing activity, Monoazo, Monomeric, Polymeric Bull. Chem. Soc. Ethiop. 2021, 35(3), 485-497. DOI: https://dx.doi.org/10.4314/bcse.v35i3.2

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“…However, majority of them are sodium salts of aromatic sulphonic acids but there are a few containing carboxylic groups. Most acid dyestuffs acquire their acidity from the presence of sulphonic acid groups or nitro groups in the molecule (Musa et al, 2013). Modification of substituents e.g.…”

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confidence: 99%

Substituent Effects on Absorption Spectra of 7-Amino-4-Hydroxynaphthalene-2- Sulfonic Acid Based Dyes

Iyun¹,

Egbe²,

Kantiok³

2020

jasem

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The synthesis of dyes derived from coupling 7-amino-4-hydroxynaphthalene-2-sulfonic acid (a diazonium salt) with different coupling agents (phenol, p-nitrophenol, vanillin and salicylic acid) respectively yielded four different dyes namely; Dye A, 4-hydroxy-7-((2- hydroxyphenyl)diazenyl)naphthalene-2-sulfonicAcid, Dye B, 4-hydroxy-7-((2-hydroxy-5- nitrophenyl)diazenyl)-4-hydroxynaphthalene-2-sulfonic Acid, Dye C, 7-((2-formyl-5-hydroxy-4-methoxyphenyl)diazenyl)-4- hydroxy naphthalene-2-sulfonic Acid and Dye D, 2-hydroxy-6-((5-hydroxy-7-sulfonaphthalene-2-yl)diazenyl)benzoic Acid. The wavelengths of maximum absorption of the dyes were determined in different solvents; water, DMF, ethanol and acetone, their λmax was between 510-600nm. The synthesized dyes were characterized using IR and their melting points determined. The dyes were applied on wool and silk and the effect of pH, time, temperature on the %exhaustion for both fabrics was determined. The optimum pH for absorption of the dyes on both fabrics was 3 & 5, optimum time 50, 75 & 90 minutes and optimum temperature75 and 90oC depending on the dye and type of fabric. The Fastness (wash, rub and light) properties of the dyes were also assessed. Keywords: Diazonium, coupling, exhaustion, fastness

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Studies on the Dyeing Of Wool and Nylon Fabrics with Some Acid Dyes

Cited by 12 publications

References 5 publications

Inhibitive Effect of NaCl and Citric Acid on the Colour Yield of Acid Dye on Nylon Fabric

Inhibitive Effect of NaCl and Citric Acid on the Colour Yield of Acid Dye on Nylon Fabric

Facile synthesis and dyeing performance of some disperse monomeric and polymeric dyes on nylon and polyester fabrics

Substituent Effects on Absorption Spectra of 7-Amino-4-Hydroxynaphthalene-2- Sulfonic Acid Based Dyes

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