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Synthesis, properties, and application of new benzothiazole-based sensitisers in polymer chemistry / Janina Kabatc in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 183-191 Titre : Synthesis, properties, and application of new benzothiazole-based sensitisers in polymer chemistry Type de document : texte imprimé Auteurs : Janina Kabatc, Auteur ; Katarzyna Jurek, Auteur Année de publication : 2015 Article en page(s) : p. 183-191 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Benzothiazoles Chromophores Colorants Hemicyanine Photoamorceurs (chimie) Polyacrylates Polyaddition Sels de borate Index. décimale : 667.2 Colorants et pigments Résumé : New photoinitiating systems composed of benzothiazolestyrylium dyes as chromophores and n-butyltriphenylborate anion as electron donor were prepared and characterised. Photoredox pairs consisting of hemicyanine dyes and organoborate salts may act as visible-light photoinitiators for the radical polymerisation of multifunctional acrylates. The efficiences of these photoinitiator systems are based on the free energy changes of an electron transfer from borate salt to the dye. Experimental results show that the photoinitiating ability of the photoredox pair tested strongly depends upon the reduction potential of hemicyanine dye, the oxidation potential of borate salt, and the structure of the dicationic dye. Note de contenu : - EXPERIMENTAL : Materials - Measurements - Synthesis - RESULTS AND DISCUSSION : Synthesis - Spectroscopic and thermodynamic properties of benzothiazolestyrylium dye/borate salt systems - Photosensitised free radical polymerisation DOI : 10.1111/cote.12149 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12149 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24117 [article]

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Effects of biowashing and liquid ammonia treatment on the physical characteristics and hand of denim fabric / In Yeol Lee in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 192-199 Titre : Effects of biowashing and liquid ammonia treatment on the physical characteristics and hand of denim fabric Type de document : texte imprimé Auteurs : In Yeol Lee, Auteur ; Go Eun Jeon, Auteur ; Suk Rae Kim, Auteur ; Carl Bengelsdorff, Auteur ; Sung Dong Kim, Auteur Année de publication : 2015 Article en page(s) : p. 192-199 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniac Cellulases Une cellulase est une enzyme qui peut décomposer la cellulose. Les cellulases sont classées EC 3.2.1.4. Elles sont produites typiquement par des bactéries, levures et de protozoaires, qui jouent un rôle majeur dans la digestion des animaux, et transformation de la matière organique végétale en humus dans le sol. Elles ont aussi des applications biotechnologiques et industrielles. Jeans Teinture -- Fibres textiles Textiles et tissus -- Lavage Textiles et tissus -- Propriétés mécaniques Index. décimale : 667.3 Teinture et impression des tissus Résumé : The changes in the physical characteristics and hand of denim fabric through aftertreatments such as biowashing using only neutral cellulase enzyme and liquid ammonia treatment were investigated. The basic physical properties of denim were measured using the Kawabata evaluation system for fabric. The results showed that biowashing increased softness and created a fade-out effect with natural colour; however, it reduced strength and elastic recovery as a result of damage to the cellulose by the enzyme. On the other hand, liquid ammonia treatment gave improved physical properties, which can be attributed to fast and uniform swelling, but resulted in a darker colour. Therefore, a combination of liquid ammonia treatment with biowashing is desirable in order to obtain a good fade-out effect while achieving softness, smoothness, and elastic recovery. Note de contenu : - EXPERIMENTAL : Materials - Denim pretreatment - Denim aftertreatment - Measurement of physical properties - Calculation of objective hand value - Measurement of surface and colour change - RESULTS AND DISCUSSION : Tensile properties - Bending properties - Shear properties - Compression properties - Surface properties - Thickness and weight - Objective hand value - Total hand value - Z-score of physical characteristics - Change in surface and colour DOI : 10.1111/cote.12142 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12142 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24118 [article]

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Colorimetric and fastness studies and analysis by reversed-phase high-performance liquid chromatography with diode-array detection of the dyeing of silk fabric with natural dye Helichrysum arenarium / Emine Torgan in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 200-205 Titre : Colorimetric and fastness studies and analysis by reversed-phase high-performance liquid chromatography with diode-array detection of the dyeing of silk fabric with natural dye Helichrysum arenarium Type de document : texte imprimé Auteurs : Emine Torgan, Auteur ; Lale Meyanci ozer, Auteur ; Recep Karadag, Auteur Année de publication : 2015 Article en page(s) : p. 200-205 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chromatographie en phase liquide à hautes performances Colorants végétaux Colorimétrie Extraction (chimie) Mordançage (teinture) Soie et constituants Solidité de la couleur Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, silk fabric samples were dyed by various procedures using Helichrysum arenarium extracts. Alum, ferrous sulfate, stanium chloride, calcium nitrate, and potassium bitartrate were used as mordants. Reversed-phase high-performance liquid chromatography with diode-array detection was utilised for identification of the dyes present in the dyed silk fabrics and the plant extracts. The extraction of dyes was carried out with a hydrochloric acid/methanol/water (2:1:1 v/v/v) mixture. The colour coordinates and K/S values, as well as wash, light, and rub fastness, were determined. Note de contenu : - EXPERIMENTAL : The mordanting and dyeing of silk fabrics - Fastness standard tests - Colour measurements - Extraction procedure for high-performance liquid chromatography - RESULTS AND DISCUSSION : High-performance liquid chromatography - Fastness properties - Effects of different mordanting procedures on the CIE L*a*b* values DOI : 10.1111/cote.12141 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12141 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24119 [article]

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Blue solid-state luminescent tetraphenylethene-organophosphorus dyads with aggregation-induced emission characteristics / Zhi-Yong Chen in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 206-212 Titre : Blue solid-state luminescent tetraphenylethene-organophosphorus dyads with aggregation-induced emission characteristics Type de document : texte imprimé Auteurs : Zhi-Yong Chen, Auteur ; Yan-Fang Ma, Auteur ; Ya-Ling Liu, Auteur ; Yi-Feng Sun, Auteur ; Zhen-Guo Chi, Auteur Année de publication : 2015 Article en page(s) : p. 206-212 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Phosphore -- Composés organiques Photoluminescence Pigments -- Synthèse Pigments à effets spéciaux Pigments organiques Tétraphényléthylène Index. décimale : 667.2 Colorants et pigments Résumé : Three novel tetraphenylethene–organophosphorus dyads – (6-oxido-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)[4-(1,2,2-triphenylvinyl)phenyl] methanol, diphenyl {hydroxy[4-(1,2,2-triphenylvinyl)phenyl]methyl} phosphine oxide, and di(3,5-dimethylphenyl){hydroxy[4-(1,2,2-triphenylvinyl)phenyl] methyl} phosphine oxide – were synthesised and characterised by 1H, 13C, and 31P nuclear magnetic resonance spectroscopy, mass spectrometry, and elemental analysis. The photoluminescence properties were studied. All three dyads exhibited intense solid-state blue emission peaking at 449–466 nm, and also displayed aggregation-induced emission behaviours. The emission decays of these dyads in the solid state also fitted well with a triexponential model with an average lifetime of 2.65–4.42 ns. The experimental results demonstrated that the luminescent properties are highly dependent on the nature of the organophosphorus groups. The choice of phosphorus-containing components can cause variations in the photoluminescence emission and photoluminescence decays. Note de contenu : - EXPERIMENTAL : General - Synthesis of tetraphenylethene-organophosphorus dyads - RESULTS AND DISCUSSION : Synthesis and characterisation - Absorption spectra - Solid-state emission and fluorescence decay times - Aggregation-induced emission properties DOI : 10.1111/cote.12146 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12146 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24120 [article]

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Recovery of ink particles in a concurrent column flotation / Ezatollah Mozaffari in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 213-217 Titre : Recovery of ink particles in a concurrent column flotation Type de document : texte imprimé Auteurs : Ezatollah Mozaffari, Auteur Année de publication : 2015 Article en page(s) : p. 213-217 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Désencrage Flottation La flottation est une technique de séparation fondée sur des différences d'hydrophobicité des surfaces des particules à séparer. Elle est utilisée en minéralurgie pour séparer des minéraux entre eux et dans le traitement des eaux usées pour éliminer les graisses. Papier Séparation (technologie) Index. décimale : 620.197 Matériaux fibreux d'origine végétale et animale : textiles, papier Résumé : Deinked pulp is made from recycled paper in an industrial process called deinking. In this process, printing ink is removed from paper fibres. This research demonstrates the deinking process and discusses factors associated with the collection of released ink particles by bubbles. Flotation is introduced as a technology for the creation of ink-laden bubbles and for the removal of the ink-concentrated froth. A downward concurrent column reactor has been designed, manufactured, and used in a series of two-phase flow experiments. The objective is to measure the liquid and gas retention time to highlight the most effective features associated with bubble particle attachment/detachment. A residence time of <10 s in the downcomer and 20 s in total was found to be sufficient for the collection and recovery of ink particles. It has been concluded that concurrent column reactors are potentially efficient for removing ink from paper fibres. Note de contenu : - Column flotation for deinking - EXPERIMENTAL : The tracer monitoring technique DOI : 10.1111/cote.12143 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12143 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24121 [article]

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Deep-coloured polyester/cotton blends with low concentrations of polymethylol dyes by a one-pass continuous dyeing process in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 218-228 Titre : Deep-coloured polyester/cotton blends with low concentrations of polymethylol dyes by a one-pass continuous dyeing process Type de document : texte imprimé Année de publication : 2015 Article en page(s) : p. 218-228 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants Colorants -- Synthèse Colorants dispersés Catégorie de colorants très peu solubles dans l'eau, utilisés à l'origine comme colorants pour l'acétate, et qui généralement sont appliqués sous forme de suspensions aqueuses de faible concentration.Les colorants dispersés sont largement utilisés dans la teinture de la plupart des fibres manufacturées, surtout le polyester. 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). Mélanges de fibres Polyesters Polyméthylol Teinture -- Fibres textiles Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : An obvious limitation of the one-pass continuous dyeing process for polyester/cotton blends is its inability to achieve deep colour depth, which is caused by the low dye fixation yields of commercial reactive dyes. In this study, the performances of polyester/cotton blends dyed with high-fixation polymethylol dyes and disperse dyes were compared with those of polyester/cotton blends dyed with a mixture of reactive dyes and disperse dyes. Polymethylol dyes were observed to be suitable for dyeing polyester/cotton blends when used in low concentrations; the required concentrations of polymethylol dyes were only 23–58% of the concentrations of commercial reactive dyes required to reach a given colour level on polyester/cotton blends. The wash and crocking fastness of polyester/cotton blends dyed with polymethylol dyes were similar to those of polyester/cotton blends dyed with reactive dyes. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Synthesis and characterisation - Calculation of the parameters of the polymethylol dyes - Dyeing process - Methods and instruments used to analyse the dyed fabrics - RESULTS AND DISCUSSION : Synthesis and characterisation of polymethylol dyes - Comparison of dyeing performances of the polymethylol dyes and the reactive dyes - The dyeing performances of the disperse dyes under the improved thermosol-thermofixation non-stop continuous dyeing process and the one-pass two-bath continuous process - Comparison of K/S values of polyester/cotton blends dyed by the one-pass two-bath continuous process and by the improved thermosol-thermofixation non-stop continuous dyeing process - Wash fastness and crocking fastness - The amount of formaldehyde released from dyed polyester/cotton blends DOI : 10.1111/cote.12147 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12147 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24122 [article]

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Derivatives of 1,4-naphthoquinone as visible-light-absorbing one-component photoinitiators for radical polymerisation / Rafal Strzelczyk in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 229-235 Titre : Derivatives of 1,4-naphthoquinone as visible-light-absorbing one-component photoinitiators for radical polymerisation Type de document : texte imprimé Auteurs : Rafal Strzelczyk, Auteur ; Radoslaw Podsiadly, Auteur Année de publication : 2015 Article en page(s) : p. 229-235 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants -- Synthèse Naphtoquinone Photoamorceurs (chimie) Polyaddition Index. décimale : 667.2 Colorants et pigments Résumé : Bifunctional visible-light photoinitiators for free radical polymerisation based on a 1,4-naphthoquinone skeleton were synthesised and characterised using proton nuclear magnetic resonance spectroscopy and chemical ionisation mass spectrometry. Their basic spectroscopic properties, such as absorption and low-temperature phosphorescence spectra, and their red-ox properties were also measured. These initiators contain an appropriate electron/hydrogen donor group in the skeleton and do not require an additional coinitiator for initiation. During irradiation they act both as a triplet photosensitiser and as a hydrogen/electron donor. The ability of each naphthoquinone to act as a photoinitiator strongly depends on its chemical structure. These studies suggest that initiator radicals are generated from the triplet state in an intermolecular electron/hydrogen transfer reaction. Note de contenu : - EXPERIMENTAL : General - Synthesis - Photochemical experiments - RESULTS AND DISCUSSION : Synthesis and spectroscopic characterisation of dyes - Free radical polymerisation DOI : 10.1111/cote.12144 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12144 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24125 [article]

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Revisiting tetranitrophenolsulfonephthalein / Nicolay O. Mchedlov-Petrossyan in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 236-244 Titre : Revisiting tetranitrophenolsulfonephthalein Type de document : texte imprimé Auteurs : Nicolay O. Mchedlov-Petrossyan, Auteur ; Kateryna V. Roshchyna, Auteur ; Sergey V. Shekhovtsov, Auteur ; Sergey V. Eltsov, Auteur ; Oleksii S. Zozulia, Auteur ; Irina V. Omelchenko, Auteur ; Oleg V. Shishkin, Auteur Année de publication : 2015 Article en page(s) : p. 236-244 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Synthèse Nitrophénols Index. décimale : 667.2 Colorants et pigments Résumé : Among the vast series of phenolsulfonephthalein dyes, the nitro derivatives and especially 3,3?,5,5?-tetranitrophenolsulfonephthalein (nitrophenol crimson) remain practically unexplored, whereas the halogen and alkyl derivatives have been studied comprehensively. This striking difference is probably due to the enormous influence of the four NO2 groups on the properties of the dye. As a result, the protolytic behaviour is unlike even that of tetrabromo phenolsulfonephthalein, and the recognised scheme of acid–base and tautomeric equilibrium of the sulfonephthaleins is unable to explain it. The molecular form H2R was isolated as a sultonic tautomer, and an X-ray crystal structure analysis was carried out. Our studies of the UV-vis absorption spectra in water, methanol, dimethyl sulfoxide, acetonitrile, acetone, and dichloromethane, as well as in aqueous micellar solutions of surfactants, allowed us to evaluate the true molar absorptivity of the dianion R2?, and to elucidate the enormous tendency to form yellow trianionic carbinol ROH3?, even in the presence of traces of H2O. Nuclear magnetic resonance and electrospray data confirm the proposed scheme of ionisation and tautomerism of nitrophenol crimson. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of the dye - Apparatus - Kinetic measurements - RESULTS AND DISCUSSION : The structure of the dye in the solid state - Nitrophenol crimson in water - Nitrophenol crimson in organic solvents - Examining nitrophenol crimson solutions by the electrospray method - The monoanion problem DOI : 10.1111/cote.12145 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12145 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24126 [article]

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Preparation and characterisation of silver or copper-doped TiO2 catalysts and their catalytic activity in dye degradation / Oleksandr Lozovskyi in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 245-254 Titre : Preparation and characterisation of silver or copper-doped TiO2 catalysts and their catalytic activity in dye degradation Type de document : texte imprimé Auteurs : Oleksandr Lozovskyi, Auteur ; Gönül Gündüz, Auteur ; Meral Dükkanci, Auteur ; Roman prihod'ko, Auteur Année de publication : 2015 Article en page(s) : p. 245-254 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Catalyseurs métalliques Colorants -- Détérioration Colorants -- Oxydation Dioxyde de titane Index. décimale : 667.2 Colorants et pigments Résumé : In this study, silver- or copper-doped TiO2–Ce-, TiO2–La-, and commercial TiO2 (P25)-supported catalysts were prepared. The catalysts and supports were characterised by powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and nitrogen adsorption studies. UV-light-assisted heterogeneous Fenton-like oxidation of two different-structure dyes (anionic azo dye Orange II, CI Acid Orange 7 and cationic triphenylmethane dye Crystal Violet, CI Basic Violet 3) was investigated over the catalysts. Higher catalytic activity was observed in the oxidation of Orange II than in the oxidation of Crystal Violet. For both dyes, the TiO2–Ce and TiO2–La-supported catalysts, which were in the form of anatase only, gave higher photocatalytic activity than the P25-supported catalysts, which were in the form of anatase and rutile. Complete colour removal was observed during oxidation of Orange II over Cu/TiO2–Ce and Cu/TiO2–La catalysts, whereas the highest degree of decolorisation, 89.3%, was achieved by oxidation of Crystal Violet over Ag/TiO2–Ce. The pH of the solution affected the surface state of the TiO2, thus affecting the photocatalytic degradation of the dyes. The surface area of the catalysts is also a key parameter that influences their photocatalytic activity. It was observed that catalysts having higher surface areas brought about greater dye degradation. Note de contenu : - EXPERIMENTAL STUDY : Materials - Catalyst preparation - Catalyst characterisation - EXPERIMENTAL PROCEDURE - RESULTS AND DISCUSSION : Catalyst characterisation - UV-light-assisted heterogeneous Fenton-like degradation of dyes DOI : 10.1111/cote.12148 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12148 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24127 [article]

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Golden organic crystals of an azobenzene derivative containing two ester bonds / Yukishige Kondo in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 255-258 Titre : Golden organic crystals of an azobenzene derivative containing two ester bonds Type de document : texte imprimé Auteurs : Yukishige Kondo, Auteur ; Kazuya Nakajima, Auteur ; Masakatsu Kato, Auteur ; Hidetaka Ohrui, Auteur ; Yutaka Takahashi, Auteur Année de publication : 2015 Article en page(s) : p. 255-258 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Benzène -- Dérivés Cristaux Esters Pigments -- Synthèse Pigments organiques Index. décimale : 667.2 Colorants et pigments Résumé : Recently we found while we were synthesising a cationic surfactant that a synthetic intermediate, 4,4?-bis{1-[2-(N,N-dimethylamino)]ethoxy}azobenzene, produced gold-coloured crystals [Matsumoto et al., J. Oleo Sci., 59, (2010) 151]. Here we describe how an azobenzene derivative, bis[4-(ethoxycarbonylmethoxy)phenyl]diazene, also forms gold-coloured crystals after recrystallisation from a mixture of acetone and water. The profile of the specular reflectance as a function of wavelength for the crystals is very similar to that for metallic gold plate, indicating that the crystals have a golden colour. The maximum specular reflectance of the crystals is 16%. Atomic force microscopy observation shows that the crystals have flat surfaces. X-ray diffraction measurements demonstrate the presence of a periodic structure in the crystals, which indicates that monolayers (lamellar structure) consisting of azobenzene molecules with a thickness of 1.42 nm are stacked in the crystals. The gold-coloured crystals are tolerant of ultraviolet light irradiation. The gold-coloured crystals may be useful as a substitute for conventional metallic pigments in specific coating applications. Note de contenu : - EXPERIMENTAL : Materials - Measurements - Synthesis of EtOCO-azo 1 - Preparation of gold-coloured crystals - Ultraviolet light irradiation - RESULTS AND DISCUSSION : Synthesis of 1 and preparation of gold-coloured crystals - Surface analysis of crystalline 1 - Probable crystal structure of 1 - Tolerance to ultraviolet light DOI : 10.1111/cote.12151 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12151 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24128 [article]

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The accelerating effect of a small cationic quaternary ammonium compound and the adsorption kinetics in the dyeing of silk with reactive dyes / Feng-Xiu Zhang in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 259-267 Titre : The accelerating effect of a small cationic quaternary ammonium compound and the adsorption kinetics in the dyeing of silk with reactive dyes Type de document : texte imprimé Auteurs : Feng-Xiu Zhang, Auteur ; Cheng Chen, Auteur ; Guang-Xian Zhang, Auteur ; Ling Zhong, Auteur ; Yuan-Song Zhang, Auteur ; Su Tan, Auteur Année de publication : 2015 Article en page(s) : p. 259-267 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniums quaternaires Cinétique chimique Colorants -- Adsorption Colorants réactifs Essais (technologie) Fixateurs (chimie) Soie et constituants Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : In order to develop an eco-friendly method for silk reactive dyeing that uses a lower accelerant dosage to achieve a higher dye fixation, hexyl dimethyl octyl ammonium chloride was synthesised as an accelerant for the dyeing of silk with reactive dyes. The accelerating effect, corresponding adsorption kinetics, and interaction mechanisms among hexyl dimethyl octyl ammonium chloride, reactive dyes, and silk were investigated. At hexyl dimethyl octyl ammonium chloride concentrations of 10.8–14.4 mm, the dye fixations for three reactive dyes were much higher than those achieved with sodium sulfate, even though the required dosages of hexyl dimethyl octyl ammonium chloride were 30–40 times lower than those of sodium sulfate. The wash fastness, rub fastness, light fastness, K/S, and colour difference values after dyeing with hexyl dimethyl octyl ammonium chloride were similar to those obtained using sodium sulfate, and silk can be dyed uniformly. The adsorption kinetics followed a second-order kinetic model. The activation energies of surface adsorption for the three reactive dyes were lower than those of sodium sulfate. The high fixation of reactive dyestuffs and the low required dosage of hexyl dimethyl octyl ammonium chloride demonstrate that the use of this new accelerant provides a novel, highly efficient method for silk dyeing. A possible acceleration mechanism of hexyl dimethyl octyl ammonium chloride for reactive dyes adsorbed on the surface of silk was proposed, based on a series of activation parameters of the adsorption process. Note de contenu : - MATERIALS AND METHODS : Materials and chemicals - Characterisation - Synthesis ofhexyl dimethyl octyl ammonium chloride - Dyeing of silk - Exhaustion - Fixation - Fastness testing - Colour testing and colour difference - Batch kinetic experiments - RESULTS AND DISCUSSION : Accelerating effect of hexyl dimethyl octyl ammonium chloride for silk dyeing with reactive dyes - Reaction mechanism ofhexyl dimethyl octyl ammonium chloride, reactive dyestuffs, and silk - Fastness properties of reactive dyes on silk - Colour, K/S value, and colour difference of silk dyed with hexyl dimethyl octyl ammonium chloride as the accelerant - Effect of temperature on dyestuff adsorption - Adsorption kinetics of reactive kyes on silk - Activation parameters DOI : 10.1111/cote.12150 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12150 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24129 [article]

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