Colour stability of wood coatings pigmented with natural indigo from Isatis tinctoria after accelerated weathering / Juha Jordan in COLORATION TECHNOLOGY, Vol. 138, N° 2 (04/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 2 (04/2022) . - p. 210-218 Titre : Colour stability of wood coatings pigmented with natural indigo from Isatis tinctoria after accelerated weathering Type de document : texte imprimé Auteurs : Juha Jordan, Auteur ; Roosa Helander, Auteur ; Päivi Laaksonen, Auteur Année de publication : 2022 Article en page(s) : p. 210-218 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements Bois -- Teinture Caractérisation Couleurs -- Stabilité Décoloration Essais accélérés (technologie) Indigo Pigments végétaux Revêtements -- Détérioration Index. décimale : 667.2 Colorants et pigments Résumé : An experimental study of artificial weathering of two outdoor coatings pigmented with natural indigo from Isatis tinctoria was carried out. The two coatings, natural indigo-pigmented boat varnish and outdoor paint, were exposed to cycles of ultraviolet light, water condensation and water spray for 40 days in a QUV test chamber. Synthetic indigo and commercial ultramarine pigment were employed as reference materials. The effects of artificial weathering on the coatings were evaluated with CIELab parameters, as well as visual inspection. Coating and pigment stability during artificial weathering were studied with reflectance spectrometry, hyperspectral imaging technology and Fourier Transform–infrared spectroscopy. According to the results, coatings with indigo proved to be more resistant to visual and spectral changes than unpigmented or commercially pigmented coatings. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation and testing - RESULTS - DISCUSSION : Colour changes and visual appearance - Pigment stability - Coating stability and ageing - Table 1 : Compositions of the coatings - Table 2 : Exposure cycle of the test. The cycle was repeated six times DOI : https://doi.org/10.1111/cote.12585 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12585 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37852 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23518	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Deinking of indigo prints using high-intensity ultrasound / A. Fricker in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B2 (06/2006) . - p. 145-155 Titre : Deinking of indigo prints using high-intensity ultrasound Type de document : texte imprimé Auteurs : A. Fricker, Auteur ; A. Manning, Auteur ; R. Thompson, Auteur Année de publication : 2006 Article en page(s) : p. 145-155 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Désencrage Encre électronique Impression numérique Indigo Papier et carton couché Ultrasons Index. décimale : 667.9 Revêtements et enduits Résumé : Fears have been expressed about the difficulty of deinking waste paper generated by the Indigo printing process. In this study, high-intensity ultrasound has been used to remove ink from Indigo digitally printed papers and break the ink particles down to sizes which are compatible with the flotation process used in deinking plants. The influences of temperature and power density have been studied and both found to have a significant effect on the resultant ink particle-size distributions. Almost 100% ink detachment has been achieved using a combination of ultrasound and aqueous washing. The conclusion is that detachment and particle-size reduction using ultrasound and aqueous washing suggests that Indigo digitally printed papers may not be so difficult to deink and recycle as originally thought. Note de contenu : - Experimental - Results for preliminary trials - Discussion of preliminary results - Sapphire coated paper - Text and image prints - Indigo inks printed as solids on sapphire coated paper - Summary of reesults for sapphire coated paper - Table 1 : Summary of preliminary findings - Table 2 : Summary of counts for unsonicated and 20 minutes sonicated text and image samples - Table 3 : Percentages removed onwashing DOI : 10.1007/BF02699644 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699644.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5385 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
004796	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Denim dyeing effluent treatment by electrocoagulation for maximum reduction in indigo and sulphur black dye discharge / Maryam Mudasir in COLORATION TECHNOLOGY, Vol. 138, N° 6 (12/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 6 (12/2022) . - p. 621-631 Titre : Denim dyeing effluent treatment by electrocoagulation for maximum reduction in indigo and sulphur black dye discharge Type de document : texte imprimé Auteurs : Maryam Mudasir, Auteur ; Sami Ur Rehman, Auteur ; Muhammad Fahad, Auteur ; Ifra Raza, Auteur ; Feroz Alam, Auteur Année de publication : 2022 Article en page(s) : p. 621-631 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants au soufre Les colorants au soufre sont des colorants utilisés pour teindre de façon assez économique des fibres cellulosiques, principalement dans des nuances sombres (noir, brun, bleu foncé). Insolubles à l'état oxydé, ils sont rendus solubles par réduction à la soude caustique pour la teinture, dans un procédé analogue aux colorants de cuve, plus chers. Les colorants s'obtiennent par action du soufre sur des composés organiques, notamment sur le 2-4-dinitrophénol (Sulphur Black 1) ou le toluène-2-4-diamine et la 4-nitroaniline (Sulphur Brown 12). Eaux usées -- Epuration Eaux usées -- Teneur en colorants Electrocoagulation Indigo Jeans Noir (couleur) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The waste effluents of two different dyes including one vat dye Indigo and one sulphur dye (Stay Black) were treated using continuous electrocoagulation (EC) technique at a denim dyeing plant. A coagulator reactor of 3 L capacity was designed to treat 7.9 L/h to 65.4 L/h of the dye wastewater. Process parameters like pH, flow rate, number of electrodes and material of electrodes were optimised to obtain maximum decrease in chemical oxygen demand (COD) and colour of the effluents before discharge. It was found that by controlling process parameters, COD can be reduced up to 79% and 90% for low concentrated Indigo and sulphur Stay Black dyes, respectively, with a reduction of colour value 98% and 70%, respectively, while for higher effluent concentrations EC efficiency was reported for 81% and 72.3% colour and COD removal, respectively, for indigo dye and 89.3% and 77.6% colour and COD removal, respectively, for sulphur dye. Hence results of the proposed study could provide important information to design a scale up large reactor unit to commercially apply on denim dyeing discharge and control pollution limits of sulphur and sulphates during denim dyeing. Note de contenu : - EXPERIMENTAL DETAILS : Materials - Methods - RESULTS AND DISCUSSION : Effects of flow rates - Effects of pH of the wastewater - Effects of current density - Table 1 : Characteristics of different dyeing wastes at the denim dying plant - Table 2 : Effects of flow rate on chemical oxygen demand (COD), pH, total dissolved solid (TDS) and colour values of diluted indigo dye effluents from fourth washing stream after treatment through electrocoagulation (EC). Initial conditions of untreated sample is pH 11.88, TDS = 5340 mg/L, COD = 2740 mg/L, colour value = 0.5 g/L - Table 3 : Effects of flow rate on chemical oxygen demand (COD), pH, total dissolved solid (TDS) and colour values of concentrated indigo dye effluents from first washing stream after treatment through electrocoagulation (EC). Initial conditions of untreated sample is pH 10.63, TDS = 5300 mg/L, COD = 5413 mg/L, colour value = 1.100 g/L - Table 4 : Effect of changing pH on percentage colour and chemical oxygen demand (COD) removal, and zeta potential using nine stainless steel electrodes for indigo dye and six aluminium and three stainless steel electrodes for sulphur black dye - Table 5 : Effects of electrocoagulation (EC) treatment on pH, total dissolved solid (TDS), chemical oxygen demand (COD) and colour values of indigo dye effluent and sulphur dark black effluent at low concentrations using all nine steel electrodes and three steel with six aluminium electrodes, respectively - Table 6 : Effects of electrocoagulation (EC) treatment on pH, total dissolved solid (TDS), chemical oxygen demand (COD) and colour values of indigo dye effluent and sulphur dark black effluent at high concentrations using all nine steel electrodes and three steel with six aluminium electrodes, respectively DOI : https://doi.org/10.1111/cote.12625 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12625 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38376 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23716	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Effect of silica based sols on the optical properties and colour fastness of synthetic indigo dyed denim fabrics / Sabiha Sezgin Bozok in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 3 (06/2021) . - p. 209-216 Titre : Effect of silica based sols on the optical properties and colour fastness of synthetic indigo dyed denim fabrics Type de document : texte imprimé Auteurs : Sabiha Sezgin Bozok, Auteur ; Ramazan Tugrul Ogulata, Auteur Année de publication : 2021 Article en page(s) : p. 209-216 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : 3-Glycidoxypropyltrimethoxysilane Colorimétrie Enrobage (technologie) Essais (technologie) Indigo Jeans Orthosilicate de tétraéthyle L'orthosilicate de tétraéthyle (TEOS) est un composé chimique de formule Si(OCH2CH3)4 ou plus simplement Si(OEt)4; l'abréviation TEOS (pour tetraethylorthosilicate) est généralement utilisée dans l'industrie du sol-gel, où il est intensivement étudié. La majorité des études en sol-gel pour des sols de silices ont utilisé ce produit comme précurseur. Le TEOS est généralement produit par alcoolyse du tétrachlorure de silicium SiCl4 dans de l'éthanol CH3CH2OH : SiCl4 + 4 CH3CH2OH → Si(OCH2CH3)4 + 4 HCl. Il est utilisé pour la réticulation de silicones et possède certaines applications comme précurseur du dioxyde de silicium SiO2 dans l'industrie des semi-conducteurs6 dans le cadre d'une réaction sol-gel. La propriété remarquable du TEOS est en effet de former du SiO2 par simple hydrolyse en libérant de l'éthanol CH3CH2OH : Si(OCH2CH3)4 + 2 H2O → SiO2 + 4 CH3CH2OH. Résistance à l'abrasion Résistance au lavage Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Sol-gel, Procédé Solidité de la couleur Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The colour of denim fabric, which has a large share in the textile market, is an important parameter together with comfort properties during usage. While some users prefer the colour of denim fabrics to have different colours as they use them, others want to be provided with colour stability of the fabrics during use. In this study, the effect of a sol-gel technique on indigo dyed denim fabrics was investigated. The aim was to reduce the colour change that occurs in denim fabrics as a result of external factors by using silica-based coatings. The sols were prepared by using TEOS (tetraethylortosilicate) and different volumes of GPTS ((3-glycidyloxypropyl)trimethoxysilane) as precursors in acidic and alkaline conditions. Synthetic indigo dyed cotton denim fabrics were treated with the sols by applying the pad-dry-cure method. It was determined that the colour strength of the treated samples increased and the fabrics treated with the sols prepared in alkaline condition became darker compared to the sols in acidic condition. It is seen that the use of crosslinkers while preparing the sol could improve the rubbing and washing fastness of commercial denim samples. Note de contenu : - MATERIALS AND METHODS : Preparation of the sols and coating process - Testing methods - RESULTS AND DISCUSSION : SEM analysis - Colour measurements - Rubbing fastness - Wash fastness - Table 1 : Content of solutions and the sample codes - Table 2 : Colour difference values of the treated samples - Table 3 : Rubbing fastness of the samples - Table 4 : Washing fastness of the samples according to the standard DOI : https://doi.org/10.1111/cote.12521 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12521 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36087 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
22845	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Energy-efficient dyeing of nylon 6 using indigo powder dyestuff after atmospheric plasma treatment at ambient pressure / Fei Fan in COLORATION TECHNOLOGY, Vol. 135, N° 4 (08/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 4 (08/2019) . - p. 322-322 Titre : Energy-efficient dyeing of nylon 6 using indigo powder dyestuff after atmospheric plasma treatment at ambient pressure Type de document : texte imprimé Auteurs : Fei Fan, Auteur ; Yingzhu Wu, Auteur ; Xunxin Wu, Auteur Année de publication : 2019 Article en page(s) : p. 322-322 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermomécanique Diélectriques Indigo Plasma à pression atmosphérique Un plasma à pression atmosphérique (ou plasma à PA ou plasma froid) est le nom donné à une catégorie spéciale de plasma pour lequel la pression approche celle de l’atmosphère. Le plasma à pression atmosphérique marque une nette différence avec le plasma basse et haute pression. En effet, contrairement à ces derniers aucune enceinte de traitement n'est nécessaire. Ce type de plasma peut donc être utilisé directement sur ligne de production, évitant ainsi l'utilisation de vide qui est extrêmement onéreuse. Polyamide 6 Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Nylon 6 was treated with a dielectric barrier discharge, i.e. atmospheric plasma at ordinary air pressure. Factors influencing the dyeing process of nylon 6 using indigo blue powder were studied. The mechanism and effect of this dyeing technology were compared with those of conventional technology. Dyeing after plasma treatment at 30–50 °C can produce high dye uptake in a short time. Notably, dyeing after plasma treatment is beneficial for energy conservation. However, at 60–70 °C, the K/S values of plasma‐treatment dyeing sharply increased over a short time, after which they remained largely unchanged. This finding indicated that the dyeing mechanism changed. The speed constant of dyeing after plasma treatment is 2.8 times that of conventional dyeing. The K/S values of dyeing samples after plasma treatment approached the dyeing saturation K/S value in a short time; therefore, this method of dyeing after plasma treatment achieves energy conservation and efficiency in a brief period of time. Conversely, conventional dyeing is more effective at high temperatures but consumes more energy. The adaptive electro‐discharge condition is achieved under the treatment conditions of 375 W for 2 min. The chromatic aberration of the dyed samples after plasma treatment is smaller than that of conventional dyeing at 50 °C for 75 min. Note de contenu : - EXPERIMENTAL : Materials - Dealing with nylon 6 under ordinary atmospheric pressure with dielectric barrier discharge - Dyeing of nylon 6 fabric using indigo blue - Morphology of nylon 6 before and after atmospheric plasma treatment - Fourier Transform-infrared spectroscopy - Wicking properties of indigo blue-dyed nylon fabric - Colour properties of dyed nylon 6 fabric - Measurement and analysis of dyeing fastness - Dyeing aberration comparison between the conventional dyeing technique and plasma treatment dyeing - RESULTS AND DISCUSSION : Plasma treatment dyeing mechanism - Influence of atmospheric plasma tratment on the capillary effect of nylon 6 at ordinary pressure - Dynamic curves of nylon 6 fabric dyeing with botanic indigo - Measurement and analysis of dyeing activation energy - Dyeing thermomechanical analysis - Measurement and analysis of dyeing fastness - Dyeing aberration comparison between conventional and plasma-treatment dyeing DOI : 10.1111/cote.12407 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12407 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32835 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21090	-	Périodique	Bibliothèque principale	Documentaires	Disponible

In situ fabric coloration with indigo synthesised in flow / Michael P. Haaf in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)  

Permalink

Indigo reduction by using microorganism: Comparison of reducing power between Dietzia sp. KDB1 and yeast (Saccharomyces cerevisiae) / Chanhee Jung in COLORATION TECHNOLOGY, Vol. 140, N° 2 (04/2024)  

Permalink

Insights into the dyeing using natural indigo (Indigofera tinctoria) : Toward an environmentally friendly garment / Luciana M. C. Silva in COLORATION TECHNOLOGY, Vol. 140, N° 1 (02/2024)  

Permalink

Kotaï, du cuir indigo dont la teinture rime avec nature / Juliette Sebille in LEATHER FASHION DESIGN (LFD), N° 1 (02/2019)  

Permalink

New electrochemical methods for the reduction of vat dyes / Albert Roessler / 2003    

Permalink

Nonionic surfactants and dispersants for biopolishing and stonewashing with Hypocrea jecorina cellulases / Luana Zilz in COLORATION TECHNOLOGY, Vol. 129, N° 1 (02/2013)  

Permalink

A propos de l'indigo / Pierre Avenas in L'ACTUALITE CHIMIQUE, N° 446 (12/2019)  

Permalink

A study on the dyeing characteristics and electrochemical behaviour of lawsone–indigo mixtures / Sunsanee Komboonchoo in COLORATION TECHNOLOGY, Vol. 127, N° 3 (2011)  

Permalink

A study on the exhaust dyeing of various synthetic fibres with indigo / Gulzar A. Baig in COLORATION TECHNOLOGY, Vol. 128, N° 2 (2012)  

Permalink

Visual sensibility evaluation of Korean traditional indigo-dyed lyocell fabrics / Eugene Lee in COLORATION TECHNOLOGY, Vol. 134, N° 4 (08/2018)  

Permalink

---

1 (1 - 15 / 15)