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COLORATION TECHNOLOGY / Society of dyers and colourists . Vol. 128, N° 6Mention de date : 2012Paru le : 26/11/2012 |
Dépouillements
Ajouter le résultat dans votre panierA novel general method for fast and easy preparation of cationic, neutral dimethinehemicyanine and dimethine dyes by uncatalysed Knoevenagel condensation / Todor Deligeorgiev in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
[article]
Titre : A novel general method for fast and easy preparation of cationic, neutral dimethinehemicyanine and dimethine dyes by uncatalysed Knoevenagel condensation Type de document : texte imprimé Auteurs : Todor Deligeorgiev, Auteur ; Nikolay Gadjev, Auteur ; Stefka Kaloyanova, Auteur ; Nedyalko Lesev, Auteur ; Aleksey Vasilev, Auteur ; Alexi Alexiev, Auteur Année de publication : 2012 Article en page(s) : p. 417-424 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
Colorants -- Synthèse
Colorants cationiques
FluorescenceIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Three novel general experimental procedures for preparation of cationic, neutral dimethinehemicyanine and dimethine dyes (eight of which are unpublished) by uncatalysed Knoevenagel condensation have been developed. The proposed methods are versatile as a variety of different starting materials can be used and they ensure good to very high yields, very short reaction times and high purity of the final dyes. Absorption and fluorescent properties of the novel dyes were investigated. DOI : 10.1111/j.1478-4408.2012.00408.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00408.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16442
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 417-424[article]Réservation
Réserver ce documentSynthesis of branched azo dyes based on benzene sulphonamide intermediates and their spectral properties in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
[article]
Titre : Synthesis of branched azo dyes based on benzene sulphonamide intermediates and their spectral properties Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 425-433 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Benzène sulfonamide
Chromophores
Colorants -- Propriétés tinctoriales
Colorants -- Synthèse
Colorants azoïques
PyrazoloneIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Benzene sulphonamide intermediates and two series of branched azo dyes (one series with H-Acid as the coupling component, and the other, with a pyrazolone derivative as the coupling component) derived from them were synthesised. The molecular structures, spectroscopic properties and dyeing properties of the dyes obtained have been investigated. The results indicated that these dyes showed one dominant hue, despite each separate branch of chromophore, and, in the first series, four chromophoric groups led to only a threefold increase in the extinction coefficient, while the same comparison in the second series produced a fully additive effect, i.e. a fourfold increase. Compared with the mono-branch dye of each series, the dyeing properties of the H-Acid series were improved, whereas the pyrazolone series that were run diversely for the two series were synthesised from different coupling components. In addition, the crystallographic structure of the tri-branch intermediate showed a non-coplanar structure, which indicated that the derived dye would perform as the sum of three similar chromophoric units. Note de contenu : - EXPERIMENTAL : General - Synthesis - Preparation of the single crystal of the intermediate and its determination on an X-ray diffractometer - Dyeing properties test
- RESULTS AND DISCUSSION : Single crystal structure of 4-amino-N,N-bis-(aminobenzenesulphonamino)-ethyl)-benzene sulphonamide - Spectrophotometric properties of azo dyes - Dyeing and fastness propertiesDOI : 10.1111/j.1478-4408.2012.00395.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00395.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16443
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 425-433[article]Réservation
Réserver ce documentElectrochemical treatment of Methyl Orange dye wastewater by rotating disc electrode : optimisation using response surface methodology / Palani Ramasamy in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
[article]
Titre : Electrochemical treatment of Methyl Orange dye wastewater by rotating disc electrode : optimisation using response surface methodology Type de document : texte imprimé Auteurs : Palani Ramasamy, Auteur ; Natesan Balasubramanian, Auteur Année de publication : 2012 Article en page(s) : p. 434-439 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Recyclage
Colorants -- Détérioration
Colorants -- Oxydation
Eaux usées -- Recyclage
Electrochimie
Réacteurs électrochimiques
Surfaces de réponse (statistique)Index. décimale : 667.3 Teinture et impression des tissus Résumé : In the present investigation, a novel rotating disc electrochemical reactor has been developed to treat Methyl Orange dye effluent. Stainless steel and ruthenium oxide-coated titanium electrodes were used as cathode and anode, respectively. A statistical tool of the Box–Behnken method has been used to design the experimental run and optimisation. The combined effect of the operating parameter on the efficiency of the process has been critically examined. A quadratic model for reduction of chemical oxygen demand has been developed. A maximum of 96% chemical oxygen demand removal was observed under optimum conditions. The degradation mechanism was studied by ultraviolet–visible spectrophotometer, Fourier Transform–infrared and high-performance liquid chromatography. From the present investigation, it has been observed that dyehouse effluent can be effectively treated using the novel electrochemical reactor. Note de contenu : - EXPERIMENTAL : Response surface methodology
- RESULTS AND DISCUSSION : The combined effect of operating parameters on dye effluent degradation - Electrolysis performance under optimum condition - Instrumental analysis of raw and treated effluentDOI : 10.1111/j.1478-4408.2012.00387.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00387.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16444
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 434-439[article]Réservation
Réserver ce documentDyeing of silk fabric with phenazine from Pseudomonas species / Rajasekar Saranya in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
[article]
Titre : Dyeing of silk fabric with phenazine from Pseudomonas species Type de document : texte imprimé Auteurs : Rajasekar Saranya, Auteur ; Jayaprakash Jayapriya, Auteur ; Alagumuthu Tamiselvi, Auteur Année de publication : 2012 Article en page(s) : p. 440-445 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Phénazine
Pigments organiques
Soie et constituants
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Phenazines, namely oxychlororaphin and pyorubin, were extracted from Pseudomonas sp., purified and their dyeing potential as colorants for silk dyeing were examined. The effects of the process variables, such as phenazine concentration, pH, temperature, time, type of mordant, relative colour strength and fastness properties have been studied. The results showed that the optimum condition for dyeing was 90 °C at pH 3 and dyeing time 90 min for oxychlororaphin, and 70 °C at pH 3 and dyeing time 60 min for pyorubin. The K/S value of a pre-mordanted silk fabric with oxychlororaphin was high when compared to that with the pyorubin. The antimicrobial activity of a dyed silk fabric was tested against Salomonella paratyphi, Escherichia coli and Shigella flexneri. Note de contenu : - MATERIALS AND METHODS : Microorganisms and media - Phenazine extraction and identification - Silk dyeing and optimisation studies - Pre-mordanting technique and dyeing - Phenazine colorant exhaustion - Colour measurements and analysis - Fastness testing - Minimum inhibitory concentration - Antimicrobial screening test
- RESULTS AND DISCUSSION : Effect of phenazine concentration and dyebath pH on the dyed silk fabric - Effect of dyeing temperature - Effect of dyeing time - Effect of mordants - Determination of the colour coordinates of a dyed silk fabric - Determination of the fastness properties - Antimicrobial activity of dyed fabricsDOI : 10.1111/j.1478-4408.2012.00397.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00397.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16445
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 440-445[article]Réservation
Réserver ce documentComparison 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]
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
UltrasonsIndex. 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 processesDOI : 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 : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16449
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 446-453[article]Réservation
Réserver ce documentDyeing properties of textiles by Turkish hazelnut (Corylus colurna) : leaves, coat, shell and dice / Mustafa Tutak in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
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Titre : Dyeing properties of textiles by Turkish hazelnut (Corylus colurna) : leaves, coat, shell and dice Type de document : texte imprimé Auteurs : Mustafa Tutak, Auteur ; Hüseyin Benli, Auteur Année de publication : 2012 Article en page(s) : p. 454-458 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants végétaux
Noisetier et constituants
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Turkey has a great number of hazelnut trees that possess nutritious components. However, only the inside part of the hazelnut is used as a nutrient, while the rest of it is waste. This study suggests that the waste parts of the Turkish hazelnut could be used as a natural dye for dyeing textile fabrics. The dyeing properties of the leaves, coat, shell and dice of the hazelnut were studied on wool, cotton and viscose fabric by using three different mordants: copper sulphate, iron sulphate and aluminium sulphate. The selected dyed fibre sample surfaces were observed using a scanning electron microscope. The colour strength (K/S), light, washing, rubbing, and perspiration fastness levels of the dyed fabrics were investigated. The experimental natural dyeing results indicate that waste hazelnut-based products can be used as a natural dye for textile coloration. Note de contenu : - EXPERIMENTAL : Fabrics - Natural dye extraction and mordant - Dyeing - Scanning electron microscope analysis - Determination of colour performance
- RESULTS AND DISCUSSION : Surface morphology - Colour strength - Fastness propertiesDOI : 10.1111/j.1478-4408.2012.00399.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00399.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16450
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 454-458[article]Réservation
Réserver ce documentSynthesis and spectroscopic characterisation of non-aggregated novel axially 4-{2-[3-(diethylamino)phenoxy]ethoxy} and crown ether substituted silicon phthalocyanines / Zekeriya Biyiklioglu in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
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Titre : Synthesis and spectroscopic characterisation of non-aggregated novel axially 4-{2-[3-(diethylamino)phenoxy]ethoxy} and crown ether substituted silicon phthalocyanines Type de document : texte imprimé Auteurs : Zekeriya Biyiklioglu, Auteur Année de publication : 2012 Article en page(s) : p. 459-463 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
ChloroformeLe chloroforme ou trichlorométhane est un composé chimique organochloré de formule brute : CHCl3.
Fréquemment utilisé comme solvant, le chloroforme tend à être remplacé actuellement par le dichlorométhane, aux propriétés similaires mais moins toxique. Le chloroforme a été jadis utilisé comme anesthésique dans les blocs opératoires et comme conservateur pour la viande.
Le chloroforme est un liquide hautement volatil. Toutefois les vapeurs de chloroforme ne forment pas de mélanges explosifs avec l'air.
Le chloroforme est un excellent solvant pour de nombreux matériaux organiques tels que graisses, huiles, résines, cires, etc. Il est complètement miscible avec de nombreux solvants organiques et dissout l'iode et le soufre.
Le chloroforme forme de nombreux mélanges azéotropiques avec d'autres liquides tels que l'acétone, l'éthanol, l'eau et le méthanol.
Le chloroforme a une constante molale cryoscopique de 4,70 °C∙kg/mol et une constante molale ébullioscopique de 3,80 °C∙kg/mol.
PhtalocyanineLa phtalocyanine, ou H2Pc, est un composé aromatique macrocyclique de formule chimique (C8H4N2)4H2. Il s'agit d'un solide bleu ayant de nombreuses applications dans les encres et les peintures ainsi qu'en photoélectricité. Structurellement apparentée aux colorants organiques tels que porphyrines et cyanines, la molécule est constituée de quatre unités isoindole liées par des atomes d'azote. H2Pc est à géométrie bidimensionnelle formant un système conjugué à 18 électrons π. Cette délocalisation électronique confère à la molécule des propriétés intéressantes à l'origine de ses applications dans les pigments et les teintures. Les complexes métalliques du dianion Pc2−, base conjuguée de H2Pc, ont des applications en catalyse, en cellules photovoltaïques organiques et en thérapie photodynamique.
Le pigment de phtalocyanine a été développé dans les années 1930 et est très utilisé aujourd'hui dans la fabrication des peintures. La phtalocyanine se retrouve également dans la composition des disques enregistrables (CD-R / colorant phtalocyanine, couche d’or métallique). (Wikipedia)
Pigments -- Analyse
Pigments -- Synthèse
Précipitation (chimie)Index. décimale : 667.3 Teinture et impression des tissus Résumé : This paper describes the synthesis and spectroscopic characterisation of a range of new axially disubstituted silicon phthalocyanines, with 4-{2-[3-(diethylamino)phenoxy]ethoxy}, 4-(1,4,7,10-tetraoxacyclododecan-2-ylmethoxy) and 4-(1,4,7,10,13,16-hexaoxacyclooctadecan-2-ylmethoxy) groups as axial ligands. These axially disubstituted silicon phthalocyanine complexes were synthesised for the first time here. The newly synthesised silicon phthalocyanines were characterised by ultraviolet–visible, infrared, proton and carbon nuclear magnetic resonance spectroscopy, electrospray ionisation mass spectrometry and elemental analysis. The aggregation behaviour of these compounds was investigated in different concentrations of chloroform and the effects of various organic solvents on the absorption spectra were studied. DOI : 10.1111/j.1478-4408.2012.00400.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00400.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16451
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 459-463[article]Réservation
Réserver ce documentThermal regeneration of spent coal-based activated carbon using carbon dioxide : process optimisation, Methylene Blue decolorisation isotherms and kinetics / Xin-Hui Duan in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
[article]
Titre : Thermal regeneration of spent coal-based activated carbon using carbon dioxide : process optimisation, Methylene Blue decolorisation isotherms and kinetics Type de document : texte imprimé Auteurs : Xin-Hui Duan, Auteur ; Srinivasa Kannan Chandrasekar, Auteur ; Wen-Wen Qu, Auteur ; Jin-Hui Peng, Auteur ; Li-Bo Zhang, Auteur Année de publication : 2012 Article en page(s) : p. 464-472 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bleu de méthylène
Charbon actif -- Recyclage
Colorants -- Adsorption
Colorants -- Détérioration
Dioxyde de carbone
Surfaces de réponse (statistique)Index. décimale : 667.3 Teinture et impression des tissus Résumé : Spent coal-based activated carbon from the silicon industry has been used as raw material for the regeneration of activated carbon, with carbon dioxide as the regenerating agent. The regeneration process was optimised using response surface methodology and the optimum regeneration conditions were: regeneration temperature 985 °C; regeneration time 120 min; and carbon dioxide flow rate of 600 ml/min. The iodine number and yield of the activated carbon obtained under the optimum regeneration conditions were 1071 mg/g and 67%, with a Brunauer–Emmet–Teller surface area of 1270 m2/g and pore volume of 0.91 cm3/g. The regenerated carbon was tested for the removal of Methylene Blue dyes. The maximum adsorption capacity was found to be 395 mg/g and the equilibrium data fitted to the Langmuir isotherm model. The kinetic data indicated that the best fit corresponds to the pseudo-second-order kinetic model. Note de contenu : - EXPERIMENTAL : Regeneration of spent activated carbon - Design of experiments - Adsorption of methylene blue
- RESULTS AND DISCUSSION : Thermal regeneration of coal-based activated carbon - Adsorption of methylene blue on the regenerated carbon - Adsorption kineticsDOI : 10.1111/j.1478-4408.2012.00401.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00401.x/pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16452
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 464-472[article]Réservation
Réserver ce documentThe effect of mordant salts on antibacterial activity of wool fabric dyed with pomegranate and walnut shell extracts in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
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Titre : The effect of mordant salts on antibacterial activity of wool fabric dyed with pomegranate and walnut shell extracts Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 473-478 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens
Colorants végétaux
Grenadier et constituants
Laine
Mordançage (teinture)
Noisetier et constituants
Odeurs -- Lutte contre
Sels métalliques
Tanins végétaux
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Natural dyes have attracted increasing worldwide attention because of the carcinogenicity and environmental effects of synthetic dyes. In this study, wool fabric was treated with tannin-rich extracts of Punica granatum peel and walnut shell in combination with some mordants. The effect of various mordants on the colorimetric and antibacterial properties of wool fabrics was investigated. The results showed that pretreatment with metallic mordants substantially improved the dyeing and fastness properties of wool fabrics. The extracts of Punica granatum peel and walnut shell showed a significant antibacterial activity at 5% concentration. In addition, antibacterial activity was dramatically enhanced using metallic salts. The antibacterial activity of samples dyed with natural dyes and without any mordant was not good, while the mordanted samples with copper, aluminum and tin salts obtained considerable antimicrobial properties following lightening and washing fastness. The extracts of Punica granatum peel and walnut shell can be considered as viable alternatives instead of artificial antibacterial agents for hospital textiles as well as an effective anti-odour agent for sports and household textiles. DOI : 10.1111/j.1478-4408.2012.00402.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00402.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16453
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 473-478[article]Réservation
Réserver ce documentOzone applications for after-clearing of disperse-dyed poly(lactic acid) fibres / Ozan Avinc in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
[article]
Titre : Ozone applications for after-clearing of disperse-dyed poly(lactic acid) fibres Type de document : texte imprimé Auteurs : Ozan Avinc, Auteur ; Hüseyin Aksel Eren, Auteur ; Pinar Uysal, Auteur Année de publication : 2012 Article en page(s) : p. 479-487 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Recyclage
Décoloration
Ozonation
Polylactique, AcideL'acide polylactique (anglais : polylactic acid, abrégé en PLA) est un polymère entièrement biodégradable utilisé dans l'alimentation pour l'emballage des œufs et plus récemment pour remplacer les sacs et cabas en plastiques jusqu'ici distribués dans les commerces. Il est utilisé également en chirurgie où les sutures sont réalisées avec des polymères biodégradables qui sont décomposés par réaction avec l’eau ou sous l’action d’enzymes. Il est également utilisé pour les nouveaux essais de stent biodégradable.
Le PLA peut-être obtenu à partir d'amidon de maïs, ce qui en fait la première alternative naturelle au polyéthylène (le terme de bioplastique est utilisé). En effet, l'acide polylactique est un produit résultant de la fermentation des sucres ou de l'amidon sous l'effet de bactéries synthétisant l'acide lactique. Dans un second temps, l'acide lactique est polymérisé par un nouveau procédé de fermentation, pour devenir de l'acide polylactique.
Ce procédé conduit à des polymères avec des masses molaires relativement basses. Afin de produire un acide polylactique avec des masses molaires plus élevées, l'acide polylactique produit par condensation de l'acide lactique est dépolymérisé, produisant du lactide, qui est à son tour polymérisé par ouverture de cycle.
Le PLA est donc l’un de ces polymères, dans lequel les longues molécules filiformes sont construites par la réaction d’un groupement acide et d’une molécule d’acide lactique sur le groupement hydroxyle d’une autre pour donner une jonction ester. Dans le corps, la réaction se fait en sens inverse et l’acide lactique ainsi libéré est incorporé dans le processus métabolique normal. On obtient un polymère plus résistant en utilisant l'acide glycolique, soit seul, soit combiné à l’acide lactique.
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, the effectiveness of the ozonation process, in neutral distilled water at room temperature, as a clearing process for disperse-dyed poly(lactic acid) fibre fabrics is investigated. The efficiency of simultaneous decolorisation of dyebath effluent and clearing of dyed poly(lactic acid) in the cooled dyebath after completion of the poly(lactic acid) dyeing cycle is also explored. Conventional alkaline reduction clearing with sodium dithionite was chosen as a control clearing process for comparison. Wash fastness, colour difference, colour removal (in Hazen) and chemical oxygen demand values were determined and compared. Long ozone treatment times at high ozone dose resulted in unacceptable colour differences. The colour difference problem was solved by use of lower ozone dose; however, a warm soaping step had to be added to the after-clearing sequence in order to achieve the desired fastness properties. A 33% reduction on the chemical oxygen demand load of the total process (dyeing + after-clearing) could be achieved by ozone after-clearing instead of using a conventional reduction clearing treatment. The addition of the warm soaping step to improve the fastness properties of the ozonated samples increased the total chemical oxygen demand of the process (dyeing + ozonation in water + warm soaping), but a 12–18% reduction on the chemical oxygen demand load of the total process was observed when compared with the conventional treatment sequence (dyeing + reduction clearing). Note de contenu : - EXPERIMENTAL : Materials - Preparation and dyeing of PLA fibres - Clearing of dyed PLA fabrics - Ozone application - Colour difference measurements - Assessment of wash fastness - Chemical oxygen demand evaluation - Dyebath effluent colour measurements
- RESULTS AND DISCUSSION : The effect of ozonation at high ozone dose on wash fastness of dyed PLA fabrics - The effect of a additional warm soaping process after ozonation at high ozone dose on the wash fastness of dyed PLA fabrics
- The effect of ozonation at alow ozone dose with a warm soaping process on the wash fastness of dyed PLA fabrics - Colour and chemical oxygen demand removal of dyebath effluent after ozonation (after-clearing) treatmentsDOI : 10.1111/j.1478-4408.2012.00403.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00403.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16454
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 479-487[article]Réservation
Réserver ce documentDirect coloration of textiles with photochromic dyes. Part 3: dyeing of wool with photochromic acid dyes / Shah M. Reduwan Billah in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
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Titre : Direct coloration of textiles with photochromic dyes. Part 3: dyeing of wool with photochromic acid dyes Type de document : texte imprimé Auteurs : Shah M. Reduwan Billah, Auteur ; Robert M. Christie, Auteur ; Renzo Shamey, Auteur Année de publication : 2012 Article en page(s) : p. 488-492 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Laine
Photochromisme
Pigments à effets spéciaux
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Wool dyed with two isomeric water-soluble spirooxazine-based photochromic acid dyes, which were specifically designed and synthesised for direct application to protein and polyamide substrates, showed reversible change from a pale yellowish colour to blue when exposed to sunlight or UV light. With the first dye, significantly higher photochromic colour change was obtained when the wool was bleached, a feature attributed to a more open fibre structure which may facilitate penetration of the non-planar dye anion and also the photocoloration reaction which requires a change in molecular geometry. Experimentation demonstrated that the optimum conditions for application of this dye to wool was from an aqueous dyebath at neutral pH and a temperature of 60 °C. An investigation using HPLC demonstrated that the dye was susceptible to decomposition in aqueous solution at higher temperatures and at lower pH values. The second dye was also applied to wool fabric to give a fabric with similar photochromic properties. The technical performance of the dyed fabrics, in terms of washfastness and photostability, was assessed. Note de contenu : - EXPERIMENTAL : Materials - Dyeing of wool fabric - Colour measurement - Study of the stability of dye 2 using high-performance liquid chromatography
- RESULTS AND DISCUSSION : Dyeing of wool with photochromic acid dyesDOI : 10.1111/j.1478-4408.2012.00406.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00406.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16455
in COLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 488-492[article]Réservation
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