Afterclearing of disperse dyed polyester with gaseous ozone / Hüseyin Aksel Eren in COLORATION TECHNOLOGY, Vol. 128, N° 2 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 2 (2012) . - p. 75-81 Titre : Afterclearing of disperse dyed polyester with gaseous ozone Type de document : texte imprimé Auteurs : Hüseyin Aksel Eren, Auteur ; Dilek Ozturk, Auteur ; Semiha Eren, Auteur Année de publication : 2012 Article en page(s) : p. 75-81 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ozonation Polyesters Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : The efficiency of ozone treatment for the clearing of disperse dyed polyethylene terephthalate fibres has been examined. The ozone treatment for the clearing of the dyed samples was performed by blowing the ozone gas from the ozone generator on to the wet fabric samples. The results indicated that 3- and 5-min ozonation times were appropriate to achieve comparable wash fastness results with conventional reduction clearing without significant colour differences (?E* value) for the samples dyed with CI Disperse Yellow 23 and CI Disperse Blue 79, respectively; however, the ozonation time had to be increased to 15 min for CI Disperse Red 82. Tensile strength tests and scanning electron microscopy analysis indicated that the ozone treatment did not cause any severe damage to the fabrics. Ozone treatment for the afterclearing of disperse dyed polyester fabric can lead to energy and time savings and environmental load reduction when compared with conventional reduction clearing. This study tested a new method of ozone application for clearing of disperse dyed polyester by blowing ozone directly on to the fabric samples. This new method of application has the advantage of being readily adoptable for continuous treatment lines and lower water consumption. Note de contenu : - EXPERIMENTAL : Materials - Preparation and dyeing of the substrates - Reduction clearing of the dyed PET fabric - Ozone application procedure - Colour strength and colour difference measurements - Wash fastness evaluation - Tensile strength and elongation at break - Surface examination by scanning electron microscopy - RESULTS AND DISCUSSION : Evaluation of the colour yield of dyed fabrics - Evaluation of the wash fastness properties - Evaluation of the effect of ozonation on tensile strength - Evaluation of the surfaces by SEM DOI : 10.1111/j.1478-4408.2011.00350.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00350.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14878 [article]

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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]

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Colour stripping of reactive-dyed cotton by ozone treatment / Semiha Eren in COLORATION TECHNOLOGY, Vol. 132, N° 6 (12/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 6 (12/2016) . - p. 466-471 Titre : Colour stripping of reactive-dyed cotton by ozone treatment Type de document : texte imprimé Auteurs : Semiha Eren, Auteur ; Buse Gümüs, Auteur ; Hüseyin Aksel Eren, Auteur Année de publication : 2016 Article en page(s) : p. 466-471 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs -- Détérioration 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). Décapage Ozonation Index. décimale : 667.3 Teinture et impression des tissus Résumé : Trials have been carried out to investigate the efficiency of ozone treatment in the colour stripping of reactive-dyed cotton fabrics. The trials were performed on a specially designed apparatus to inject ozone gas into the liquor passing through a perforated beam with fabric rolls on it, just like a beam dyeing machine with ozone venturi injection. Conventional reductive colour stripping was applied as the control treatment, and ozone treatment was applied for three different application times (15, 30, and 45 min). Trials were performed with seven selected reactive dyes having various chromophores and reactive groups. The results indicate that 45 min ozone treatment yielded the best colour stripping results among the three application times. Furthermore, the colour stripping percentages of the 45 min ozone treatment were higher for four of the tested dyes, the same for one of the tested dyes, and lower for two of the tested dyes compared with the control treatment, which consisted of conventional reductive colour stripping. Colour stripping of 90% and above was achieved for all samples of the 45 min ozone treatment. The chemical oxygen demand values of the colour stripping baths were compared: the average value of the 45 min ozone application baths was 105 mg l?1, and it was 1993 mg l?1 for the conventional reductive treatment baths. Consequently, a reduction in chemical oxygen demand of almost 94% was achieved by ozone treatment compared with conventional reductive treatment. The strength values of the fabrics after the respective treatments were similar, with a difference of only 3%. Note de contenu : - EXPERIMENTAL : Materials - Dyeing of the substrates - Colour stripping of the dyed cotton fabric - Ozone application procedure - Dyeing of the colour-stripped samples - Colour strenght and colour stripping percentage measurements - Wash fastness evaluation - Fabric tensile streght measurements - Chemical oxygen demand evaluation - RESULTS AND DISCUSSION : Colour stripping percentages of the dyed fabrics after different stripping treatment - Colour yield and colour differences of the samples dyed black - Environmental benefit of the ozone treatment - Strength of the samples DOI : 10.1111/cote.12240 En ligne : https://drive.google.com/file/d/1IJvuq1dyPpnMhj-oikCXhcQOwCmrzhtr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27284 [article]

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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]

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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]

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