scholarly journals Synthesis and application of 2-aminothiadiazole disperse dyes for nylon fabrics

2001 ◽  
Vol 66 (2) ◽  
pp. 87-93
Author(s):  
Maradiya Raghav ◽  
Vithal Patel
Keyword(s):  
Elemental Analysis ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Light Fastness ◽  
Nylon Fabric ◽  
Wide Range

Some disperse dyes based on 2-amino-5-mercapto-1,3,4-thiadiazole have been prepared by coupling with various N-arylacrylamides. The dyes were characterized by IR spectral studies and elemental analysis. All the dyes were applied as disperse dyes on nylon fabric. These dyes have been found to give a wide range of color shades with very good depth and levelness on fabrics. The percentage dye bath exhaustion and fixation on the fabric have been found to be very good. The dyied fabrics showed moderate to good light fastness and very good to excellent washing, rubbing, persperation and sublimation fastness properties.

scholarly journals Dyeing of hydrophobic fabrics with disperse dyes

2001 ◽  
Vol 66 (6) ◽  
pp. 367-376 ◽  
Author(s):  
Hari Maradiya ◽  
Vithal Patel
Keyword(s):  
Absorption Spectroscopy ◽  
Elemental Analysis ◽  
Cellulose Triacetate ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Visible Absorption ◽  
Dyed Fabrics ◽  
Yellowish Orange ◽  
Visible Absorption Spectroscopy

A series of disperse dyes has been synthesized by diazotisation of 2,6-dibromo-4-nitroaniline and coupled with various N-arylmaleimides. The dyes were characterized by IR spectral studies, visible absorption spectroscopy and elemental analysis. All the dyes were applied as disperse dyes on nylon, cellulose triacetate and polyester fabrics. These dyeswere found to give yellowish orange to deep brown shades with very good depth, levelness and brightness on different fabrics. The percentage dye bath exhaustion and fixation on fabrics were found to be very good. The light, washing, rubbing, perspiration and sublimation fastness properties of the dyed fabrics were found to be good to excellent.

scholarly journals Disperse Dyes Based on Thiazole, Their Dyeing Application on Polyester Fiber and Their Antimicrobial Activity

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
S. K. Zadafiya ◽  
J. H. Tailor ◽  
G. M. Malik
Keyword(s):  
Antimicrobial Activity ◽  
Elemental Analysis ◽  
Polyester Fiber ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Antibacterial And Antifungal Activities ◽  
Aryl Amines ◽  
Azo Disperse Dyes ◽  
Antibacterial And Antifungal

Various diazotized aryl amines were coupled with N-(4-nitrophenyl)-2-[(4-phenyl-1,3-thiazol-2-yl)amino]acetamide to give the corresponding various azo disperse dyes (D1-D13). These dyes were applied to polyester fiber by HTHP method and their fastness properties were evaluated. Dyes were characterized by IR, elemental analysis, and NMR spectral studies. These dyes showed very good antibacterial and antifungal activities.

scholarly journals Synthesis of monoazo disperse dyes based on 2-aminoheterocycles and their dyeing performance on nylon fabrics

2000 ◽  
Vol 65 (11) ◽  
pp. 773-780 ◽  
Author(s):  
Hari Maradiya ◽  
Vithal Patel
Keyword(s):  
Absorption Spectra ◽  
Elemental Analysis ◽  
Disperse Dyes ◽  
Visible Absorption ◽  
Dyeing Performance ◽  
Nylon Fabric ◽  
Wide Range ◽  
Rf Values ◽  
Monoazo Disperse Dyes ◽  
Dyed Fabric

Novel monoazo disperse dyes based on various 2-aminoheterocycles were prepared using N-methyl-N-(2-hydroxyethyl)aniline as the coupling component. All the dyes were applied as disperse dyes on nylon fabric. These dyes have been found to give a wide range of colour shades with very good depth, brightness and levelness on nylon fabric. The visible absorption spectra, elemental analysis and Rf values were investigated. The percentage dye bath exhaustion on fabric was found to be very good. The dyed fabric showed very good to excellent fastness to light, washing, rubbing and perspiration. The sublimation fastness was found to be excellent.

scholarly journals Monoazo disperse dyes based on 2-amino-1,3,4-thiadiazole derivatives

2002 ◽  
Vol 67 (11) ◽  
pp. 709-718 ◽  
Author(s):  
Harir Maradiya
Keyword(s):  
Spectral Properties ◽  
Visible Range ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Light Fastness ◽  
Dyeing Performance ◽  
Brown Colour ◽  
Nylon Fabric ◽  
Monoazo Disperse Dyes ◽  
Dyed Fabric

A series of monoazo disperse dyes based on 2-amino-5-mercapto-1,3,4-thiadiazole was prepared by coupling with various N-arylmaleimides. The dyeing performance of these dyes was assessed on nylon fabric. The dyes were found to give yellow to brown colour shades on dyeing with good depth and levelness on nylon fabric. The dyebath exhaustion fixation and fastness properties of the dyes were also determined. The dyed fabric showed moderate to good light fastness and very good to excellent fastness to washing, rubbing, perspiration and sublimation. The IR and visible range spectral properties of the dyes were also determined.

scholarly journals Synthesis of Disperse Dyes from Pyridone and Resorcinol Coupled to Diazotized 2-Amino-4-chloro-5-formylthiazole and Application to Polyester

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yusuf Y. Lams ◽  
P. O. Nkeonye ◽  
K. A. Bello ◽  
M. K. Yakubu ◽  
A. O. Lawal
Keyword(s):  
Absorption Spectroscopy ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Visible Absorption ◽  
Polyester Fabrics ◽  
Wash Fastness ◽  
Dyed Fabrics ◽  
Visible Absorption Spectroscopy ◽  
C Nmr

The aim of this study was to synthesize disperse dyes in the derivative of 2-amino-4-chloro-5-formylthiazole by conventional diazotization and couplings with pyridone and resorcinol. The dyes were characterized by visible absorption spectroscopy, IR spectral studies, and 1H and 13C NMR. The pyridone and resorcinol substituted dyes exhausted well with good depth on 100% polyester fabrics with a shade of brown and purple colours, respectively. The heteroatom and the intrinsic conjugation in the thiazole structure results in high bathochromic shifts and lead to brightness of shades. The dyed fabrics showed very good to excellent wash fastness and moderate to good light and perspiration fastness properties.

scholarly journals Synthesis and Spectral Studies of Some Homo Dinuclear Lanthanide(III) Complexes of a Mesogenic Schiff Base

2021 ◽  
Vol 68 (4) ◽  
pp. 904-912
Author(s):  
Prem Kumar Shrestha ◽  
Pawan Raj Shakya
Keyword(s):  
Mass Spectrometry ◽  
Differential Scanning Calorimetry ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Spectral Studies ◽  
Scanning Calorimetry ◽  
Spectral Techniques ◽  
Zwitterionic Form ◽  
Smectic A ◽  
Wide Range

A mesogenic Schiff base, N,N’-di(4-decyloxysalicylidene)-1’,8’-diamino-3’,6’-dioxaoctane (H2L) and a series of homo dinuclear lanthanide(III) complexes of the type [Ln2(LH2)3(NO3)4](NO3)2, (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, and Ho) were synthesized and characterized by elemental analysis, mass spectrometry, FTIR, and NMR spectral techniques. The IR and NMR spectral evidences imply bonding of a neutral bidentate H2L species through two phenolate oxygen atoms in its zwitterionic form to LnIII, rendering the overall geometry of the complexes as a seven-coordinate polyhedron – possibly distorted mono-capped octahedron. Differential scanning calorimetry (DSC) and polarizing optical icroscopic (POM) studies reveal mesogenic properties (smectic-X, smectic-A and nematic mesophases) in the ligand over a wide range of temperature but none mesomorphism in the LnIII complexes synthesized under this study. Luminescence studies exhibit emissions of H2L and TbIII complex.

scholarly journals Assessment of Dyeing Properties of Novel Bisazo-Bisazomethine Disperse Dyes on Polyester Fabric

2011 ◽  
Vol 8 (3) ◽  
pp. 1218-1225 ◽  
Author(s):  
B. C. Dixit ◽  
D. M. Patel
Keyword(s):  
Aromatic Amines ◽  
Polyester Fabric ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Visible Absorption ◽  
Polyester Fabrics ◽  
H Nmr ◽  
Dyeing Performance ◽  
Uv Visible

Novel bisazo-bisazomethine disperse dyes were prepared by the coupling of diazotized solutions of various aromatic amines with 2,2'-{sulfonylbis [4,1-phenylene nitrilomethylylidene]} diphenol (SB). Above Schiff base was prepared by the condensation of 2-hydroxybenzaldehyde with 4,4’-sulphonyl- dianiline (Dapson). The resultant dyes were characterized by elemental analysis, IR and1H NMR spectral studies. The UV Visible absorption spectral data were investigated in dimethylformamide (DMF) and are discussed in terms of structural property relationship. Their dyeing performance as disperse dyes has been assessed on polyester fabrics. The results show that a better hue was obtained on polyester fabrics and have mild to moderate fastness properties.

scholarly journals 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

2019 ◽  
Vol 11 (2) ◽  
pp. 215-224 ◽  
Author(s):  
O. J. Otutu ◽  
A. K. Asiagwu
Keyword(s):  
Nylon 6 ◽  
Disperse Dyes ◽  
Coupling Reactions ◽  
Fastness Properties ◽  
Light Fastness ◽  
Technical Performance ◽  
Magnetic Resonance Data ◽  
Diazo Coupling ◽  
Resonance Data ◽  
Azo Disperse Dyes

Six new bis-azo disperse dyes were synthesized by linking various aryl amino and hydroxyl derivatives to 4-methoxy-2-nitroaniline and 6-amino-2,4-dihydroxypyrimidine moieties through diazo coupling reactions. The structures of the bis-azo dyes were identified by Fourier transform infrared, proton and carbon 13 nuclear magnetic resonance data. The prepared dyestuffs were applied onto polyester and nylon 6 fabrics and subsequently their fastness properties in terms of light, washing, sublimation and rubbing were determined. Compared with the light fastness of polyester fabrics, the light fastness of the dyed nylon 6 fabrics were slightly lower. The technical performance of the dyes on the two textile substrates used for the study, demonstrated their useful applications in the dyeing of synthetic fibres.

Sustainable dyeing of selected natural and synthetic fabrics using waste teak leaves (Tectona Grandis L.)

2020 ◽  
Vol 24 (4) ◽  
pp. 357-374
Author(s):  
Akshita Agrawal ◽  
Sheetal Chopra
Keyword(s):  
Moisture Content ◽  
Tectona Grandis ◽  
Waste Utilization ◽  
Ash Content ◽  
Test Method ◽  
Fastness Properties ◽  
Light Fastness ◽  
Content Type ◽  
Wide Range ◽  
Natural And Synthetic

Purpose This paper aims to extract the dye colourant from teak leaves using different aqueous mediums (Alkaline, Neutral and Acidic); to characterize the dye in terms of yield %; ash content and moisture content; to standardize the conditions of application of dye extracted from teak leaves on selected natural and synthetic fabrics using selected natural and chemical mordants; to assess the colour value (K/S, L*, c*/ h*, a*, b*) and fastness properties of the dyed samples in terms of wash, rub, light and perspiration fastness; and to develop dyed and printed designs using combinations of mordant and extracted dye. Design/methodology/approach Stage 1 – Extraction of dye from teak leaves; and characterization of dye: yield% ash content and moisture content. Stage 2 – Preparation of fabrics for dyeing; optimization of mordanting parameters using pre mordanting method followed by post mordanting; and optimization of dyeing parameters. Stage 3 – Testing of dyed fabric – Colour Measurement; K/S L*a*b*/L*c*h*; fastness properties; wash fastness done in the Laundrometer using ISO 2 standard test method; crock fastness done by Crockmeter using AATCC 116–1995 test method; perspiration fastness tested by perspirometer using AATCC 15– 2007 test method; and light fastness assessment in Mercury Bulb Tungsten Filament (MBTF) light fastness tester using AATCC Test Method 16–2004. Findings The findings of the study show that waste teak leaves can be used as an effective dye for natural as well as synthetic fabrics giving a wide range of colours on wool, silk and nylon. The maximum relative colour strength of the extracted dye on unmordanted dyed samples was found to be at pH 5 on wool and silk and at pH 7 on nylon. A range of shades was obtained with the use of different mordants. The extracted dye showed moderate to good fastness properties in terms of light, wash, rub and perspiration on wool and silk and excellent on nylon. Fastness properties were found to improve with the application of mordants both as pre and post method. Various combinations of mordants and dye result in obtaining pleasing and harmonious colours which were used aesthetically for printing. Research limitations/implications Due to time constrains, extraction in an organic medium could not be done, which could be a further scope for study. Practical implications Dyeing using teak leaves is a step towards sustainability and effective waste utilization with promising potential for application on natural as well as synthetic fabrics. Good colour with added properties will provide excellent solutions for eco-friendly methods of dyeing. Social implications This paper demonstrates the new possibilities offered by innovative uses of by-products of the timber industry and open good prospects for alternatives to synthetic colourants and new markets for the textile industry. It offers a new tool for the development of slow fashion. Originality/value It is a common practice to prune the tree branches to improve wood quality; thus, leaves are easily available as by product from pruning and also from wood harvesting. In the present study, waste teak leaves (Tectona grandis L.) were used for the extraction of dye.

Synthesis and Dyeing Performance of N,N-Bis(2-cyanoethyl)-m-methylaniline Disperse Dyes

2012 ◽  
Vol 550-553 ◽  
pp. 21-26
Author(s):  
Wei Liu ◽  
Ying Zhao ◽  
Ze Hua Yu ◽  
Xiao Qiao Wan ◽  
Wen Lan Li
Keyword(s):  
Aromatic Amines ◽  
Polyester Fiber ◽  
Heterocyclic Aromatic Amines ◽  
Disperse Dyes ◽  
Light Fastness ◽  
Dyeing Performance ◽  
Wide Range ◽  
Azo Disperse Dyes

Four di-cyanoethyl azo disperse dyes based on N,N-bis(2-cyanoethyl)-m-methylaniline were synthesized using four different heterocyclic aromatic amines as the diazo components. They were characterized by UV-Vis, IR, 1HNMR, MS and EA. The dyeing performance of these dyes were assessed on polyester, fir powder, and acetylated fir powder. On polyester, the results showed that the maxinum absorption of four heterocyclic azo disperse dyes were from 414 nm to 599 nm(acetone), they were also found to show a wide range of colour shades followed as yellow, bright crimson, bulish violet and blue shades, the dyed fibers also presented good light fastness and excellent fastness to wash. Simultaneously, the dyeing performance of the dyes were also assessed on acetylated fir powder and they were found to give the similar color shades comparing with the dyeing on polyester fiber.

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