An investigation of process parameters on colour during the dyeing of polyester in supercritical carbon dioxide media / Idil Yigit in COLORATION TECHNOLOGY, Vol. 137, N° 6 (12/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 6 (12/2021) . - p. 625-644 Titre : An investigation of process parameters on colour during the dyeing of polyester in supercritical carbon dioxide media Type de document : texte imprimé Auteurs : Idil Yigit, Auteur ; Semiha Eren, Auteur ; Hande Ozcan, Auteur ; Ozan Avinc, Auteur ; Hüseyin Aksel Eren, Auteur Année de publication : 2021 Article en page(s) : p. 625-644 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de carbone Fibres polyesters Fluides supercritiques Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Innovative supercritical carbon dioxide (scCO2) treatment conditions in fluidised media technology were examined for polyester dyeing. The different dyeing processes in scCO2 media were carried out under a constant dyeing temperature of 120°C (at pressures ranging from 9 to 29 MPa), a constant pressure of 25 MPa (at dyeing temperatures ranging from 40 to 140°C) and a constant density range of 500-550 kg/m3 (at combinations of dyeing temperatures ranging from 80 to 130°C and dyeing pressures ranging from 18 to 28 MPa). The constant dyeing temperature, constant dyeing pressure and constant density (120°C, 25 MPa, 500-550 kg/m3, respectively) were selected according to the best results in the literature and recommendations from industrial applications for polyester dyeing in scCO2 media. The different conditions of the studied parameters and their influence are discussed. Colour difference (ΔE) and colour strength (K/S), as well as washing fastness and bursting strength properties, were investigated and compared. Acceptable colour properties (similar to those for standard [control reference] fabric: dyed in scCO2 media at 120°C, 25 MPa pressure and 506 kg/m3 density for 90 minutes) on polyester fabric, with commercially acceptable and quite high washing fastness levels and comparable bursting strength values (similar to those for standard fabric without significant or drastic strength loss), could be achieved with the following scCO2 dyeing processes: at a lower dyeing pressure with the same dyeing temperature (in scCO2 media at 120°C, 21 MPa pressure and 423 kg/m3 density for 90 minutes), at a lower dyeing temperature with the same dyeing pressure (in scCO2 media at 100°C, 25 MPa pressure and 588 kg/m3 density for 90 minutes) and at both a lower dyeing pressure and a lower dyeing temperature with a constant density range of 500-550 kg/m3 (in scCO2 media at 110°C, 24 MPa pressure and 526 kg/m3 density for 90 minutes). Satisfactory and successful dyeing properties and performance similar to polyester fibre dyed under standard scCO2 dyeing conditions with less energy consumption could be achieved with the correct scCO2 dyeing process parameter optimisation. For instance, the dyeing process in the scCO2 environment at the same dyeing temperature with the standard scCO2 dyeing process (at 120°C), but with a lower dyeing pressure (at 21 vs 25 MPa), resulted in a 17 kWh decrease in energy consumption. In conclusion, it is very important to choose the correct dyeing pressure to obtain level dyeing in the polyester dyeing process carried out in a scCO2 environment and to achieve a reduction in energy consumption during dyeing in a scCO2 medium. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - RESULTS AND DISCUSSION : Constant temperature experiment results - Constant density range experiment results DOI : https://doi.org/10.1111/cote.12553 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12553 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36793 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23068	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Comparison of the colour fading effects of sodium hypochlorite and ozone treatments / Idil Yigit in COLORATION TECHNOLOGY, Vol. 137, N° 6 (12/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 6 (12/2021) . - p. 615-624 Titre : Comparison of the colour fading effects of sodium hypochlorite and ozone treatments Type de document : texte imprimé Auteurs : Idil Yigit, Auteur ; Semiha Eren, Auteur ; Recep Karali, Auteur ; Fahri Yibar, Auteur ; Hüseyin Aksel Eren, Auteur Année de publication : 2021 Article en page(s) : p. 615-624 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Décoloration Eau -- Consommation Énergie -- Consommation Hypochlorite de sodium Mesure Ozone Produits chimiques -- Consommation Textiles et tissus Index. décimale : 667.3 Teinture et impression des tissus Résumé : Colour fading is a method that is used to achieve a vintage look in textile goods. It is desired by customers in the textile market. Additionally, customers demand that these types of products are produced by environmentally friendly methods. In this study, sodium hypochlorite and ozone were used as laboratory-scale colour fading reagents on dyed cotton fabrics. Cotton fabrics were dyed with four different primary colours: red, yellow, blue and black. Dyed fabrics were subjected to ozone and sodium hypochlorite treatment under different treatment conditions. Ozone was chosen as an alternative for comparison and it was applied at fixed flow rate (5 L/min) and time (10 minutes). Colour differences, chemical oxygen demand, bursting strength and energy, water and chemical consumptions were measured. The surface morphology was characterised by scanning electron microscopy. We can conclude that ozonation is effective in discharging colour from dyed fabric samples, and the colour-fading effect is uniform, like in sodium hypochlorite treatment. It was observed that both processes are similar in terms of strength and surface modification. Results showed a 90% cost reduction, 85% water conservation and a 26% chemical oxygen demand reduction. Note de contenu : - MATERIALS AND METHODS : Materials - METHODS : Dyeing - Fading - Fading by sodium hypochlorite - Fading by ozone - Fading effect measurement - Measurement of colour - Measurement of scanning electron microscopy - Strength and environmental impact measurement - Bursting strength tests - Chemical oxygen demand tests - Energy, water and chemical consumption comparisons - RESULTS AND DISCUSSION : Measurement of colour - Scanning electron microscopy observations - Bursting strength tests - Chemical oxygen demand tests - Energy, water and chemical consumption comparisons - Table 1 : A comparison of ozone and sodium hypochlorite fading - Table 2 : Colorimetric data of ozone and sodium hypochlorite treatments - Table 3 : The chemical oxygen demand (COD) loads of effluents according to fading treatment - Table 4 : Energy, water, and chemical consumption comparisons DOI : https://doi.org/10.1111/cote.12554 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12554 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36792 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23068	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Ozone utilisation for discharge printing of reactive dyed cotton / Idil Yigit in COLORATION TECHNOLOGY, Vol. 134, N° 1 (02/2018)  

[article]  inCOLORATION TECHNOLOGY > Vol. 134, N° 1 (02/2018) . - p. 13-23 Titre : Ozone utilisation for discharge printing of reactive dyed cotton Type de document : texte imprimé Auteurs : Idil Yigit, Auteur ; Semiha Eren, Auteur ; Hüseyin Aksel Eren, Auteur Année de publication : 2018 Article en page(s) : p. 13-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Impression sur étoffes Ozone Produits chimiques -- Suppression ou remplacement Résistance à l'abrasion Résistance au lavage Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Environmental pollution is one of the major concerns of the textile finishing sector. The reduction or substitution of the harsh chemicals used during dyeing and printing processes is necessary. In this study, the use of ozone for the discharge printing process was examined in order to substitute the use of reductive agent and caustic soda by ozone gas. The reactive dyed cotton samples were wetted by water and some selected solutions at 25%, 40% and 60% pick up were used and subjected to ozone gas treatment. The gas flow rates were 5 and 10 l/min for 5 and 10 min treatment times, respectively. The results were compared with that of conventional discharge printed samples. Colour discharge (%), colour difference (ΔE), strength, washing and rubbing fastness and chemical oxygen demand (COD) values were compared and reported. Colour discharge increased at higher gas flow rates and prolonged treatment times. Although ozone printing could not attain the contour sharpness of conventional discharge printing, the addition of selected chemicals affected colour discharge and the contour sharpness. Strength tests did not show a significant decrease when using ozone treatment. Fastness tests results (washing and rubbing) were slightly higher compared with conventional discharge printed samples. COD values were much lower for ozone treatment compared with conventional discharge printing effluent. Consequently, it was demonstrated that ozone may be an environmentally friendly substitute for discharge printing. Note de contenu : - Visual comparison - Colour discharge - Wash and rub fastness of the samples - Strength of the samples - COD evaluation DOI : 10.1111/cote.12306 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12306 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30123 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
19649	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 3 / 3)