Study of the Relationships between the Chemical Structures of Azo Disperse Dyes and their Dyeing Properties on Polyester

2010 ◽  
Vol 93-94 ◽  
pp. 332-335 ◽  
Author(s):  
T. Mungmeechai ◽  
Suesat Jantip ◽  
P. Suwanruji
Keyword(s):  
Bathochromic Shift ◽  
Spectroscopic Properties ◽  
Poly Lactic Acid ◽  
Disperse Dyes ◽  
Light Fastness ◽  
Dyeing Properties ◽  
Chemical Structures ◽  
Azo Disperse Dyes ◽  
Poly Ethylene ◽  
Dyed Fabrics

A series of azo disperse dyes was synthesized using 4-nitro aniline and 2-chloro-4-nitro aniline as diazo components. The coupling components were N,N-diethyl aniline, N,N-bis-β-hydroxyethyl aniline, N,N-bis-β-acetoxyethyl aniline, N,N-diethyl-m-toluidine, N,N-bis-β-hydroxyethyl-m-toluidine and N,N-bis-β-acetoxyethyl-m-toluidine. The structures of the synthesized dyes were confirmed by TLC, 1H NMR and elemental analysis. The spectroscopic properties of the dyes when dissolved in the organic solvents viz. ethyl acetate and methyl benzoate, were investigated. The absorption spectra of the dyes showed a bathochromic shift when the polarity of the solvents increased. In addition, the substituent groups on the dye structures influenced the spectroscopic properties of the dyes. The dyeing properties of the dyes on poly(ethylene terephthalate) and poly(lactic acid) fabrics were also studied. The dyes exhibited a slight difference in shade on the two polyester fabrics. Heat and light fastness properties of the dyed fabrics were also examined.

Study on Spectroscopic and Dyeing Characteristics of Curcumin on Poly(lactic acid) and Poly(ethylene terephthalate) Fabrics

2011 ◽  
Vol 233-235 ◽  
pp. 1384-1387 ◽  
Author(s):  
Vorabodee Sriumaroum ◽  
Sarit Liprapan ◽  
Benjawan Siriphet ◽  
Suesat Jantip ◽  
Potjanart Suwanruji
Keyword(s):  
Lactic Acid ◽  
Ethyl Acetate ◽  
Ethylene Terephthalate ◽  
Bathochromic Shift ◽  
Spectroscopic Properties ◽  
Methyl Benzoate ◽  
Poly Lactic Acid ◽  
Poly Ethylene Terephthalate ◽  
Color Yield ◽  
Poly Ethylene

This research aimed to study the use of curcumin as a natural dye for dyeing poly(lactic acid) and poly(ethylene terephthalate) fabrics. The study found that curcumin was dyeable on PLA and PET, providing a brilliant yellow color on the fabric. Curcumin could build up very well on PLA, while lower build up was on PET. At the same applied concentration, higher color yield was observed on the dyed PLA fabric. To achieve the same visual color yield, a significantly lower concentration of curcumin was required for PLA as compared with PET. The color shade of curcumin-dyed PLA differed from the PET analogue. A bathochromic shift of the K/S curve was found when the substrate was changed from PLA to PET. The influence of polymer media on the spectroscopic properties of curcumin could be elucidated by measuring absorbance properties of curcumin in ethyl acetate and methyl benzoate, being representatives of PLA and PET, respectively. At the same concentration, curcumin solution in ethyl acetate exhibited higher absorbance than that in methyl benzoate, corresponding to the deeper shade obtained when dyed on PLA as compared with PET. Bathochromic shift of absorbance curve was also observed when the solvent was changed from ethyl acetate to methyl benzoate.

scholarly journals Microwave assisted synthesis of some azo disperse dyes part 2: Eco-friendly dyeing of polyester fabrics by using microwave irradiation

2021 ◽  
Vol 12 (1) ◽  
pp. 64-68
Author(s):  
Mohamed Osman Saleh ◽  
Morsy Ahmed El-Apasery ◽  
Abdelhaleem Mostafa Hussein ◽  
Abu-Bakr Abdelhady El-Adasy ◽  
Magda Mohamed Kamel
Keyword(s):  
Microwave Irradiation ◽  
Disperse Dyes ◽  
Microwave Assisted Synthesis ◽  
Color Intensity ◽  
Light Fastness ◽  
Polyester Fabrics ◽  
Dye Absorption ◽  
Azo Disperse Dyes ◽  
Dyed Fabric ◽  
Green Technique

This study aimed to use microwave irradiation as a green technique, not only to enhance the dyeing efficiency of disperse-colored polyester fabrics, but also to conserve resources and minimize the environmental effects. Arylazopyrazolopyrimidinones dyes 1-9 were applied to polyester fabrics at 2% shade using conventional method and microwave at 100 °C. Both the color intensity expressed as dye absorption and the fastness characteristics of the dyed fabric were investigated. The K/S values are increased by increasing the time of irradiation from 10-60 minutes. The dyed substrate displayed good light fastness, and very good fastness levels to rubbing, perspiration washing, and sublimation, respectively.

Synthesis of 4-arylazo-2-(N-pyrazolylcarboxamido)thiophene disperse dyes for dyeing of polyester and their antibacterial evaluation

2020 ◽  
Vol 90 (23-24) ◽  
pp. 2795-2805
Author(s):  
Amal Al-Azmi ◽  
Elizabeth John
Keyword(s):  
Antibacterial Activities ◽  
Antimicrobial Activities ◽  
Disperse Dyes ◽  
Bacterial Strains ◽  
Light Fastness ◽  
Polyester Fabrics ◽  
Nuclear Magnetic Resonance Spectra ◽  
Current Article ◽  
Dyed Fabrics ◽  
Dyed Fabric

The current article aims to synthesize some new arylazo-thiophenes for dyeing polyester fabrics and screen their antimicrobial activities. The new 4-arylazo-2-( N-pyrazolylcarboxamido)-thiophene dyes 4a–e were prepared by the reaction of 2-acetyl-2-arylazo-thioacetanilide derivative 1 with 2-chloro- N-(3-methyl-1 H-pyrazol-5-yl)acetamide derivative 2. The structures of these prepared analogues were established via Fourier-transform infrared and 1H/13C nuclear magnetic resonance spectra. The synthesized dyestuffs were applied to polyester fabrics after establishing the optimal dyeing conditions at 130 ºC, high pressure, 3% shade, and liquor ratio 20:1 at pH 5. Furthermore, the dyed fabrics obtained under these optimal conditions resulted in proper colorfastness toward washing, rubbing, sublimation and perspiration, and were adequate for light fastness. They showed respectable antibacterial effectiveness against two bacterial strains, Staphylococcus aureus (Gram-positive) and Salmonella typhimurium (Gram-negative) bacteria. The dyed fabric with dye 4d displayed the best antibacterial activities with percentage reduction of 88% and 76% against S. aureus and S. typhimurium bacteria, respectively.

Dyeing properties and deodorizing/antibacterial performance of cotton/silk/wool fabrics dyed with myrrh (Commiphora myrrha) extract

2016 ◽  
Vol 87 (8) ◽  
pp. 973-983 ◽  
Author(s):  
Young-Hee Lee ◽  
Seul-Gi Lee ◽  
Eun-Kyung Hwang ◽  
Young-Mee Baek ◽  
Sunja Cho ◽  
...  
Keyword(s):  
Reduction Rate ◽  
Klebsiella Pneumonia ◽  
Light Fastness ◽  
Dyeing Properties ◽  
Natural Colorant ◽  
High Antibacterial Activity ◽  
Oxide Component ◽  
Antibacterial Performance ◽  
Wool Fabrics ◽  
Dyed Fabrics

An aqueous solution containing a natural colorant (myrrh extract) was obtained by extraction from myrrh using water as an extracting solvent at 90℃ for 90 min with a fixed material to liquor ratio of 1:10. The dyeing properties, color fastness and deodorizing/antibacterial performance of fabrics (cotton, silk and wool fabrics) dyed with myrrh extract were evaluated. The main component in myrrh extract was found to be polysaccharides composed of D-galactose/D-glucuronic acid/L-arabinose and protein. The yellow-red color of fabrics dyed with myrrh extract was attributed to the copper (I) oxide component. The K/ S value of the dyed fabrics increased in the order of cotton < silk < wool. The washing, water and acid/alkaline perspiration fastness of dyed cotton/silk/wool fabrics were good (Grade 4–5), except light fastness (Grade 1–3). The deodorizing performance of dyed fabrics against ammonia and acetic acid was found to be significantly better than the control (undyed) fabrics. The dyed fabrics exhibited an excellent antibacterial performance (99.9% bacteriostatic reduction rate) against both Klebsiella pneumonia and Staphylococcus aureus. These results highlight the strong potential of the natural dyed fabrics as a functional material with both high antibacterial activity and deodorizing function.

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