Synthesis and Application to Polyester and Nylon 6 Fabrics of Hetaryl Bis-Azo Disperse Dyes Based on 6-Amino-2,4-Dihydroxypyrimidine and 4-Methoxy-2-Nitroaniline Moieties

J.O, Otutu; Asiagwu, A. K.

doi:10.3329/jsr.v11i2.38734

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…The nitroso dyes contain the R-N=O group, which in association with the hydroxyl groups are capable of complexing with various metals. This ability of the monoazodyes to complex with metals have been reported for the purpose of inhibiting corrosion of metals [2,3]. In addition, some nitroso dyes have been found to exhibit near infrared properties.…”

Section: Introductionmentioning

confidence: 88%

Synthesis of Nitroso-Based Bis-Azo Dyes And Their Dyeing Properties For Polyethylene Terephthalate And Polyamide

Augustine

Otutu

2020

Egypt. J. Chem.

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The aim of this work is the synthesis of new azo nitroso-based dispersed dyes with better dyeing properties on synthetic fibers. In this regard, bis-azo nitroso naphthalene dyes were synthesized via the diazo coupling reactions of 4-nitroaniline with 1-hydroxy-2-nitrosonapthalene. Products formed were characterized by 1 H and 13 C NMR.Absorption values in the UV-vis spectra of the derivatives under study were quite close and they exhibited multiple maxima in the 386 -513nm range. The dyeing process, dye exhaustion on polyethylene terephthalate (PET) and polyamide 6 (nylon 6) fabrics, and the durability of the dyes on the textile substrates were evaluated. It was found that the light fastness ratings of the dyed fabrics could reach grade 6/7 to 7, while washing fastness gave excellent values of grade 5 rubbing and perspiration fastness grades were rated at 4/5 to 5 on the International Geometric Scale. The results obtained suggested that the dyes could be used as disperse dyes on synthetic polymers fibres.

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Section: Introductionmentioning

confidence: 88%

Synthesis of Nitroso-Based Bis-Azo Dyes And Their Dyeing Properties For Polyethylene Terephthalate And Polyamide

Augustine

Otutu

2020

Egypt. J. Chem.

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“…However, the performance of the colourant during dry and wet rubbing with copper sulphate as the mordant was observed to be better compared with stannous chloride mordant. The ability of a colourant on a dyed or printed fabric to resist the action of daylight is an important attribute of coloured textiles [29]. The light fastness results of the dyed cotton and polyamide 6 fabrics are shown in Table 3.…”

Section: Fastness Propertiesmentioning

confidence: 99%

Extraction and Application of Natural Colourant from the Bark of Berlinia Grandiflora on Cotton and Polyamide 6 Fabrics

Asiagwu

Otutu

Onyesom

et al. 2021

eijs

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The aim of this study is to extract and utilise the bark of Berlinia grandiflora as a natural dye source for the colouration of cotton and polyamide 6 fabrics. The solvents used for this study were water, methanol, acetone, and methanol/potassium hydroxide. The best of all the solvents used was water. In the extraction process, the various solvents were extracted with Soxhlet extractor. The optimum colourant extraction was observed at 40 °C for 2 h. The extracted compound was isolated and characterized by UV spectrophotometry; proton and carbon-13 nuclear magnetic resonance, mass spectrometry, and Fourier transform infrared spectroscopy. Mordanting and subsequent dyeing of cotton and polyamide 6 fabrics with the extracted colourant were performed to investigate the dye’s efficiency. Two metal salts, namely copper sulphate and stannous chloride, were used as mordants. Furthermore, the washing, rubbing, and light fastness properties of dyed samples were tested. The results of the fastness tests showed that the natural dye gave light fastness value (3= fair) without the use of mordants, whereas the values were 5 on cotton and 4 on nylon 6 with the use of mordants. The results of fastness of rubbing and washing were excellent for both cotton and nylon. The outcome of the study presents a potentially useful natural colourant for the colouration of natural and synthetic fibers.

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“…The outer surface has a major impact on the fibre properties. Many researchers around the globe are working on the study of basic properties and also the structural modifications of cotton fibre to attain more stability by depositing nano-composites on the cotton fibre [4][5][6][7][8][9][10]. The elastic properties of cotton fibre play an important role in the textile industry applications.…”

Section: Introductionmentioning

confidence: 99%

Studies on Structure and Elasto-Mechanical Properties of Suvin Cotton Fibre

2020

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The comprehensive elastic properties of Suvin cotton fibre have been estimated. The Linked Atom Least Square method (LALS) technique has been employed to compute the structural properties using the X-ray diffraction data. Using Treloar’s assumptions the elastic stiffness matrix |Cij| has been calculated, then by utilizing the Voigt theory the elastic constants like Young’s modulus (E), Bulk modulus (K), Shear modulus (G), Poisson’s ratio (ν) and linear compressibility (β) have been estimated. Further, the experimental results of elastic constants are obtained and compared with the computed results and a broad correlation between them has been observed. ELATE web application tool is used to obtain the 3-dimensional images of variation of elastic constants along their spatial axes. From these figures an attempt has been made to explain the anisotropic mechanical property with respect to directional dependent Young’s modulus (E) and Shear modulus properties (G).

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Synthesis and Application to Polyester and Nylon 6 Fabrics of Hetaryl Bis-Azo Disperse Dyes Based on 6-Amino-2,4-Dihydroxypyrimidine and 4-Methoxy-2-Nitroaniline Moieties

Cited by 6 publications

References 11 publications

Synthesis of Nitroso-Based Bis-Azo Dyes And Their Dyeing Properties For Polyethylene Terephthalate And Polyamide

Synthesis of Nitroso-Based Bis-Azo Dyes And Their Dyeing Properties For Polyethylene Terephthalate And Polyamide

Extraction and Application of Natural Colourant from the Bark of Berlinia Grandiflora on Cotton and Polyamide 6 Fabrics

Studies on Structure and Elasto-Mechanical Properties of Suvin Cotton Fibre

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