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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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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A comparative study of ozonation on aqueous reactive dyes and reactive-dyed cotton / Mengru Li in COLORATION TECHNOLOGY, Vol. 137, N° 4 (12/07/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 4 (12/07/2021) . - p. 376-388 Titre : A comparative study of ozonation on aqueous reactive dyes and reactive-dyed cotton Type de document : texte imprimé Auteurs : Mengru Li, Auteur ; Zhenglei He, Auteur ; Jie Xu, Auteur Année de publication : 2021 Article en page(s) : p. 376-388 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs 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). Ozonation Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Ozonation is increasingly being used and reported in recent years. This paper investigates ozonation on aqueous reactive dyes and their dyed cotton comparatively. The effects, including pH, temperature and initial dye concentration (for aqueous dyes)/water pick-up (for dyed cotton), on Reactive Blue FL-RN, Reactive Red FL-2BL and Reactive Yellow FL-2RN, were studied via Fourier Transform–infrared spectroscopy, ultraviolet-visible absorption and k/s curves. The kinetic results indicated that all the aqueous dyes were of pseudo-first order kinetics, while dyed cotton represented pseudo-secondary or pseudo-third order kinetics. Based on their different mechanisms, there was a dramatic gap between dyes and dyed cotton in ozonation performance. The curve of rate constant vs pH of dye ozonation exhibited a U-shape with the minimum value at pH 7, but for dyed cotton ozonation, the curve showed a Λ-shape optimised at pH 10. Also, high temperature resulted in hydrolysis of dyes in aqueous solution, whereas this was not applicable to dyed cotton. The effect of pick-up (0%-150% with an interval of 75%) on reactive-dyed cotton was greater than the effect of initial dye concentration (which varied from 120 to 40 mg/L) on the colour yield of aqueous reactive dyes. Note de contenu : - EXPERIMENTAL : Material - Apparatus - Pretreatments and dyeing of cotton fabrics - Ozonation - Analytical methods - Kinetics studies - RESULTS AND DISCUSSION : UV-vis absorption and K/S curves - Colour yield mechanism and FTIR analysis - Kinetics reaction order of ozonation - The change in rate constants with pH during the ozonation of reactive dyes and reactive-dyed cotton - The change in rate constants with temperature in the ozonation of reactive dyes and reactive-dyed cotton - The change in rate constants with initial dye concentration during the ozonation of reactive dyes and pick-up of ozonation on reactive-dyed cotton - Table 1 : Chemical structure λ max of the dyes' dominant sector DOI : https://doi.org/10.1111/cote.12534 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12534 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36102 [article]

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Comparison of different ultrasound support methods during colour and chemical oxygen demand removal of disperse and reactive dyebath solutions by ozonation / Hüseyin Aksel Eren in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 446-453 Titre : Comparison of different ultrasound support methods during colour and chemical oxygen demand removal of disperse and reactive dyebath solutions by ozonation Type de document : texte imprimé Auteurs : Hüseyin Aksel Eren, Auteur ; Ozan Avinc, Auteur ; Burcu Erismis, Auteur Année de publication : 2012 Article en page(s) : p. 446-453 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Recyclage Décoloration Eaux usées -- Recyclage Ozonation Ultrasons Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, the effects of ozonation, ozonation with ultrasonic bath and ozonation with ultrasonic homogeniser processes on colour and chemical oxygen demand removal properties of disperse (CI Disperse Red 60, CI Disperse Blue 337) and reactive (CI Reactive Blue 171 and CI Reactive Blue 19) dyebath solutions with and without dyeing auxiliaries were investigated. Chemical oxygen demand (in mg/l) and colour (in Hazen) measurements of the studied dyebath solutions were determined. The ozonation process caused simultaneous chemical oxygen demand removal during decolorisation. However, the improvement in chemical oxygen demand reduction was less than of that on decolorisation. The application of the combination of ozonation with ultrasonic homogeniser is the most efficient process and creates a great time advantage over the other process types studied (ozonation alone and ozonation with ultrasonic bath) to reach the same colour and levels of chemical oxygen demand removal. Note de contenu : - EXPERIMENTAL : Materials - Preparation of dye solutions - Combined use of ozonation andultrasound technologies for decolorisation and chemical oxygen demand removal of effluents from the textile dyeing process - Colour measurement of dyebath solution - Chemical oxygen demand evaluation - RESULTS AND DISCUSSION : Decolorisation of reactive and disperse dyebath solutions - Chemical oxygen demand removal after ozonation and the combination processes DOI : 10.1111/j.1478-4408.2012.00398.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00398.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16449 [article]

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Effect of the ozonation process on the dyeability of mohair fibres / Riza Atav in COLORATION TECHNOLOGY, Vol. 127, N° 3 (2011)  

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 3 (2011) . - p. 159-166 Titre : Effect of the ozonation process on the dyeability of mohair fibres Type de document : texte imprimé Auteurs : Riza Atav, Auteur ; Abbas Yurdakul, Auteur Année de publication : 2011 Article en page(s) : p. 159-166 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Laine Mohair Ozonation Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : This work has focused on the use of ozonation in order to improve the dyeability of mohair fibres. The study was carried out using a known concentration of ozone and involved process parameters such as wet pick-up, level of pH and treatment time. The effect of fibre ozonation was assessed in terms of colour, and test samples were also evaluated using scanning electron microscopy and Fourier transform–infrared spectroscopy. The optimum conditions of the ozonation process were determined as 60% wet pick-up, pH 7 and 30 min. According to the experimental results, it can be concluded that ozonated mohair fibres can be dyed both at 90 and 80 °C with all dye classes without causing any decrease in colour yield. Dyeing kinetics and thermodynamics were also studied and it was demonstrated that the rate constant and the standard affinity of the ozonated sample increased. Note de contenu : EXPERIMENTAL : Materials - Ozone treatment - Fibre dyeability - Alkali solubility - Fourier transform-infrared spectroscopy - Scanning electron microscopy - Fibre dyeability of optimised ozone-treated mohair using different classes of dyes - Kinetic and thermodynamic study. RESULTS AND DISCUSSION : Optimisation of the ozonation treatment - Effect of the ozonation treatment on fibre dyeability with various dye classes - Effect of the ozonation treatment on dyeing kinetics and thermodynamics. DOI : 10.1111/j.1478-4408.2011.00293.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00293.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12194 [article]

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Effects of ozone treatment on denim garment properties / Abir Ben Fraj in COLORATION TECHNOLOGY, Vol. 137, N° 6 (12/2021)  

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Investigation on treatment of tannery effluent through ozonation / Vasudevan Preethi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 9 (09/2009)  

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L'ozonation des effluents / Marie-Laure Touloumet in CTC ENTREPRISES, (10/2013)  

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Ozonation of the reactive dye intermediate 2-naphthylamine 3,6,8-trisulphonic acid (K-Acid) : kinetic assessment, ozonation products and ecotoxicity / Idil Arslan-Alaton in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

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Ozone applications for after-clearing of disperse-dyed poly(lactic acid) fibres / Ozan Avinc in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)  

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Vieillisement des élastomères diéniques / Jacques Lemaire in CAOUTCHOUCS & PLASTIQUES, N° 771 (10/1998)

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