Relationship between structure and dyeing properties of reactive dyes for cotton dyeing

Siddiqua, Umme Habibah; Ali, Shaukat; Iqbal, Munawar; Hussain, Tanveer

doi:10.1016/j.molliq.2017.04.057

Cited by 109 publications

(47 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The irregular decomposition noted with reactive dyes was attributed to the aqueous instability of these dyes. All these findings were in agreement with previous works (Meriç et al, 2004;Siddiqua et al, 2017;Sun et al, 2009).…”

Section: Effect Of [H 2 O 2 ]/[Feso 4 ] Molar Ratiosupporting

confidence: 94%

Ecological contribution of Fenton process for generation of a ready-to-reuse dyeing and finishing effluent

Miled

Ladhari²

2020

WSA

View full text Add to dashboard Cite

In this study, real wastewater from a dyeing factory and previously treated by biological processes was decolorized by Fenton oxidation. Direct and reactive dyebaths and the related auxiliaries constituted the polluted effluents. A synthetic wastewater was also prepared in the same way in order to compare degradation performance. The study was performed with a systematic approach, searching optimum values of H2O2 and FeSO4 concentrations, pH, temperature and the chemical structure of each tested dye. Depollution results showed that the oxidation behaviour of synthetic and real wastewaters was very similar, especially during the first stage where the breaking of chromophore groups allowed fast colour removal. However, it was found that higher ratios of [H2O2]/[FeSO4] must be engaged in the case of real wastewaters. Results also showed that the catalytic oxidation yielded a fast and complete depollution at [H2O2]/[FeSO4] = 70, pH 3 and temperature 40°C. For experiments with direct dye, colour and COD removals were, respectively, 90% and 87% in the case of real wastewater. Reactive real wastewater showed non-stable oxidation evolution due to the hydrolysed dyestuff and this led to 83% and 45% decolourization and COD removal, respectively. Better depollution results were noted for the synthetic wastewater experiments. This finding was related to the non-stable composition of the real wastewater and the unknown chemical and physical interferences between its compounds. After sedimentation, reuse of the treated wastewater for new dyeing experiments was also investigated. For this purpose, the whole process was run under complete recycling mode and the previously treated effluent was re-used as fresh dyebath. Results in terms of colour depth and fastness showed that dyeing performances were very similar, and an important opportunity is offered by reusing wastewater treated by Fenton oxidation process.

show abstract

Section: Effect Of [H 2 O 2 ]/[Feso 4 ] Molar Ratiosupporting

confidence: 94%

Ecological contribution of Fenton process for generation of a ready-to-reuse dyeing and finishing effluent

Miled

Ladhari²

2020

WSA

View full text Add to dashboard Cite

show abstract

“…Among them, modification of cotton is very important, it has received more and more attention in dyeing industry recently. Researchers found that cotton modification can not only change the surface charge of the fibers from negative to positive to promote dye adsorption, it also increases the reactivity of the fibers to achieve high dye fixation [13]. Chemical modification agents, such as glycidyltrimethylammonium chloride (GTA), 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC), polyepichlorohydrin-dimethylamine (PECH-amine), and betaine, have been investigated to modify cotton [8,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Salt-Free Dyeing of Modified Cotton through Graft Polymerization with Highly Enhanced Dye Fixation and Good Strength Properties

Yan

et al. 2020

Polymers

View full text Add to dashboard Cite

Modification of cotton fabric with 2-methacryloyloxyethyltrimethyl ammonium chloride (DMC) was achieved through free-radical initiated graft polymerization with K2S2O8/NaHSO3 as the initiator. Grafting of DMC was confirmed by ATR-IR of the modified cotton. The optimal grafting reaction conditions, including DMC dosage, mole ratio of initiator to DMC, temperature, and time, were determined by cation content and dye fixation results of the modified cotton. The modified fibers were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and whiteness measurement. Salt-free dyeing of the modified cotton with commonly used C. I. Reactive Blue 19, C. I. Reactive Yellow 145, and C. I. Reactive Red 195 presented high fixation of 96.8%, 98.7%, and 97.3%, respectively. These results indicated that the modification is effective for changing the surface charge of the fiber and increasing the dye-fiber reactivity. The color fastness and strength property were still very satisfactory. With excellent properties, this dyeing method shows promise in real application for eliminating the usage of salt and reducing environmental pollution.

show abstract

“…Also, reactive dyes have the advantages of bright colour, a variety of hues and a convenient production process, which makes them the main class of dyes for cotton dyeing. The nature and number of reactive groups affects the exhaustion and fixation of the dyes . Usually, bifunctional dyes have a higher fixation than those with only one reactive group…”

Section: Introductionmentioning

confidence: 99%

Synthesis and application of KM‐type reactive dyes containing 2‐ethoxy‐4‐chloro‐s‐triazine

Zhang

Xiong

Zhang

et al. 2019

Coloration Technology

View full text Add to dashboard Cite

A new kind of hetero‐bifunctional reactive dye containing 2‐ethoxy‐4‐chloro‐s‐triazine, with better activity matching with β‐hydroxyethyl sulphone sulphate at a low fixation temperature, was successfully synthesised and characterised. An ethoxy group was designed to be introduced into triazine to increase the substantivity and the reactivity of the dyes. Thereby, the fixation of mono‐s‐chlorotriazine/hydroxyethyl sulphone sulphate (KM‐type) bifunctional reactive dyes on cotton was improved, and dyeing under mild conditions with high fixation was realised. Nineteen dyes with orange, red and blue colours were synthesised and characterised by UV‐Vis and infrared spectroscopy and mass spectrometry. Synthesised dyes were dyed at 60, 75 and 90°C, respectively. Exhaustion and reactivity for all of the ethoxy‐containing KM‐type dyes was over 90% at the optimal temperature, and fixation was over 87%, which was higher than the ethoxy‐free comparative dyes. The optimal fixation temperature of ethoxy‐containing dyes was initially reduced to 75°C, and then to 60°C. Compared with comparative dyes, the wash fastness and light fastness were basically unchanged, and the wet rub fastness of the H‐acid series was reduced by one grade.

show abstract

Relationship between structure and dyeing properties of reactive dyes for cotton dyeing

Cited by 109 publications

References 42 publications

Ecological contribution of Fenton process for generation of a ready-to-reuse dyeing and finishing effluent

Ecological contribution of Fenton process for generation of a ready-to-reuse dyeing and finishing effluent

Salt-Free Dyeing of Modified Cotton through Graft Polymerization with Highly Enhanced Dye Fixation and Good Strength Properties

Synthesis and application of KM‐type reactive dyes containing 2‐ethoxy‐4‐chloro‐s‐triazine

Contact Info

Product

Resources

About