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Nouveaux renforts pour les biopolyamides d'Evonik in FORMULE VERTE, N° 11 (10/2012)
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Titre : Nouveaux renforts pour les biopolyamides d'Evonik Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 37 Langues : Français (fre) Catégories : Biomatériaux
Biopolymères
Composites à fibres végétales
Matériaux hybrides
Polyamide 66
ViscoseIndex. décimale : 668.4 Plastiques, vinyles Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15910
in FORMULE VERTE > N° 11 (10/2012) . - p. 37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14182 - Périodique Bibliothèque principale Documentaires Disponible A novel approach to using neural networks to predict the colour of fibre blends / Caroline Hemingray in COLORATION TECHNOLOGY, Vol. 132, N° 4 (08/2016)
[article]
Titre : A novel approach to using neural networks to predict the colour of fibre blends Type de document : texte imprimé Auteurs : Caroline Hemingray, Auteur ; Stephen Westland, Auteur Année de publication : 2016 Article en page(s) : p. 297-303 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Mélanges de fibres
Prévision, Théorie de la
Réseaux neuronaux (informatique)
ViscoseIndex. décimale : 667.9 Revêtements et enduits Résumé : This work is concerned with the colour prediction of viscose fibre blends, comparing two conventional prediction models (the Stearns–Noechel model and the Friele model) and two neural network models. A total of 333 blended samples were prepared from eight primary colours, including two-, three-, and four-colour mixtures. The performance of the prediction models was evaluated using 60 of the 333 blended samples. The other 273 samples were used to train the neural networks. It was found that the performance of both neural networks exceeded the performance of both conventional prediction models. When the neural networks were trained using the 273 training samples, the average CIELAB colour differences (between measured and predicted colour of blends) for the 60 samples in the test set were close to 1.0 for the neural network models. When the number of training samples was reduced to only 100, the performance of the neural networks degraded, but they still gave lower colour differences between measured and predicted colour than the conventional models. The first neural network was a conventional network similar to that which has been used by several other researchers; the second neural network was a novel application of a standard neural network where, rather than using a single network, a set of small neural networks was used, each of which predicted reflectance at a single wavelength. The single-wavelength neural network was shown to be more robust than the conventional neural network when the number of training examples was small. DOI : 10.1111/cote.12220 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12220 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26731
in COLORATION TECHNOLOGY > Vol. 132, N° 4 (08/2016) . - p. 297-303[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18246 - Périodique Bibliothèque principale Documentaires Disponible Pigment particle interactions with viscose polymeric media during manufacturing of dope dyed viscose fibers / Esha Sharma in CHEMICAL FIBERS INTERNATIONAL, Vol. 70, N° 2/3 (09/2020)
[article]
Titre : Pigment particle interactions with viscose polymeric media during manufacturing of dope dyed viscose fibers Type de document : texte imprimé Auteurs : Esha Sharma, Auteur ; Neelesh Shukla, Auteur ; Gurudatt Krishnamurthy, Auteur ; Sunil Bhagwat, Auteur ; Ravindra V. Adivarekar, Auteur Année de publication : 2020 Article en page(s) : p. 95-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie textile
Dispersions et suspensions
Filature au mouilléProcédé dans lequel une solution de substance fibrogène est extrudée dans un milieu liquide de coagulation où le polymère est régénéré, comme dans la fabrication de la viscose ou de la rayonne cuproammoniacale.
Pigments
Stabilisants (chimie)
Teinture -- Fibres textiles synthétiques
Teinture dans la masse
ViscoseIndex. décimale : 677.4 Textiles artificiels Résumé : Wet treatment post-fiber processing such as dyeing, finishing and function-alization of fabrics results in the generation of a large amount of effluents of dyes and chemicals, creating an adverse impact on the environment and human health. Imparting the coloration and functionalization during the process of making the fiber itself is an effective solution practiced in the synthetic and regenerated cellulosicfiber industry to reduce this impact, e.g. dope dyeing, adding cationic dyeability etc. The challenges involved in the case of fiber level modifications in regenerated cellulose process like viscose are different from those encountered in synthetic fiber processes. Though commercial products based on fiber modifications are available, a gap exists in the understanding of additives — media interactions in the viscose process. This study has been initiated to bridge the gap and enable better processability and product quality in products made through fiber modification. In this specific article the focus is on pigment-slurry/dope interactions, during the process of making dope dyed viscose fibers. Note de contenu : - INTERACTIONS DURING DIFFERENT PROCESS STEPS : Particle - particle - media interaction at slurry stage - Particle - particle - media interaction at dope stage
- EFFECT OF KEY PARAMETERS ON AGGLOMERATION OF PIGMENT PARTICLES
- REDUCING AGGLOMERATION OFPIGMENT PARTICLES : Optimization of stabilizer chemistry in pigment slurry and viscose dope
- Fig. 1 : Schematic of environmental sustainability of Birla Spunshades
- Fig. 2 : Stages of dispersion
- Fig. 3 : Microscopic images of pigment particles in different pH solutions in slurry and dope
- Fig. 4 : Effect of concentrations of 3 stabilizers on particle size in slurry at pH 14
- Fig. 5 : Effect of 2 stabilizers and their concentrations on filterability of dope
- Fig. 6 : Back pressure increase with time lot during dope dyed fiber spinning
- Table : Few key fiber properties of fibers made at pilot scale with different stabilizersEn ligne : https://drive.google.com/file/d/1MzWHblN-I7RIpvXSIeDrtcwUW3TItYXE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34560
in CHEMICAL FIBERS INTERNATIONAL > Vol. 70, N° 2/3 (09/2020) . - p. 95-97[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22194 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of chitosan coatings onto regular cellulose fibers with ultrasound technique / Urška Vrabič Brodnjak in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 2 (03/2013)
[article]
Titre : Preparation and characterization of chitosan coatings onto regular cellulose fibers with ultrasound technique Type de document : texte imprimé Auteurs : Urška Vrabič Brodnjak, Auteur ; Diana Gregor-Svetec, Auteur Année de publication : 2013 Article en page(s) : p. 247-257 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Caractérisation
ChitosaneLe chitosane ou chitosan est un polyoside composé de la distribution aléatoire de D-glucosamine liée en ß-(1-4) (unité désacétylée) et de N-acétyl-D-glucosamine (unité acétylée). Il est produit par désacétylation chimique (en milieu alcalin) ou enzymatique de la chitine, le composant de l'exosquelette des arthropodes (crustacés) ou de l'endosquelette des céphalopodes (calmars...) ou encore de la paroi des champignons. Cette matière première est déminéralisée par traitement à l'acide chlorhydrique, puis déprotéinée en présence de soude ou de potasse et enfin décolorée grâce à un agent oxydant. Le degré d'acétylation (DA) est le pourcentage d'unités acétylées par rapport au nombre d'unités totales, il peut être déterminé par spectroscopie infrarouge à transformée de Fourier (IR-TF) ou par un titrage par une base forte. La frontière entre chitosane et chitine correspond à un DA de 50 % : en deçà le composé est nommé chitosane, au-delà, chitine. Le chitosane est soluble en milieu acide contrairement à la chitine qui est insoluble. Il est important de faire la distinction entre le degré d'acétylation (DA) et le degré de déacétylation (DD). L'un étant l'inverse de l'autre c'est-à-dire que du chitosane ayant un DD de 85 %, possède 15 % de groupements acétyles et 85 % de groupements amines sur ses chaînes.
Le chitosane est biodégradable et biocompatible (notamment hémocompatible). Il est également bactériostatique et fongistatique.
Le chitosane est également utilisé pour le traitement des eaux usées par filtration ainsi que dans divers domaines comme la cosmétique, la diététique et la médecine.
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Ultrasons
ViscoseIndex. décimale : 667.9 Revêtements et enduits Résumé : Regenerated cellulose fibers—viscose fibers—were coated with chitosan using an ultrasound technique to improve their accessibility, reactivity and sorption properties. The main purpose of our research was to study the modification of viscose fibers and to determine the effect of the application of chitosan onto viscose fibers. Samples were obtained by treating the fibers with chitosan in a dilute acetic acid solution in an ultrasonic bath. The influences of the chitosan coating on the changes in morphology, supramolecular structure, sorption and tensile properties were studied. The spectra (FTIR analysis) of the treated viscose fibers showed changes and new absorption bands that revealed the existence of the chemical interactions with the chitosan. The scanning electron microscope images confirmed that the surface of the fibers was covered with the chitosan. A decrease in the water retention value and increase in the absorption and moisture content with an increasing concentration of chitosan was noted. Furthermore, the differences in tensile behavior were analyzed using an Instron tensile testing machine. The chitosan coating had no effect on the tensile strength of the viscose fibers, but influenced the tensile strain. Some changes, though not significant, were noted in the structure (crystallinity, orientation) of the treated viscose fibers. Note de contenu : - METHODS : Treatment of viscose fibers with chitosan - Determination of the structure of treated viscose fibers - Determination of tensile proerties of modified viscose fibers - Determination of sorption properties of modified viscose fibers
- RESULTS AND DISCUSSION : Structural properties of fibers - Tensile properties - Sorption propertiesDOI : 10.1007/s11998-012-9447-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9447-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18249
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 2 (03/2013) . - p. 247-257[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14920 - Périodique Bibliothèque principale Documentaires Disponible 15125 - Périodique Bibliothèque principale Documentaires Disponible 15592 - Périodique Bibliothèque principale Documentaires Disponible Preparation of cationic viscose and its salt-free dyeing using reactive dye / Yue Li in COLORATION TECHNOLOGY, Vol. 138, N° 4 (08/2022)
[article]
Titre : Preparation of cationic viscose and its salt-free dyeing using reactive dye Type de document : texte imprimé Auteurs : Yue Li, Auteur ; Shixiong Zhai, Auteur ; Weiwei Dong, Auteur ; Chengjian Yao, Auteur ; Zhuizhui Fan, Auteur ; Kaili Jin, Auteur ; Hong Zhao, Auteur ; Mengting Wang, Auteur ; Zaisheng Cai, Auteur Année de publication : 2022 Article en page(s) : p. 378-387 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniums quaternaires
Caractérisation
Colorants réactifs
Essais dynamiques
Hydroxyde de sodiumL'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol.
La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude.
Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate.
La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante.
Résistance à l'abrasion
Teinture -- Fibres textiles synthétiques
Teinture sans sels
Température
ViscoseIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The traditional dyeing process of reactive dyes requires a large amount of inorganic salts to accelerate the combination of dyes and textiles, which leads to substantially more water pollution. In this work, we used a quaternary ammonium-type cationic modifier, 3-chloro-2-hydroxypropyl trimethylammonium chloride (CHPTAC), to modify the viscose acetal fibre before the dyeing process. After the modification, reactive dyes were dyed without any inorganic salt. Then the fabric was finished with a commercial wet rubbing fastness enhancer, FM-8, to improve the colour fastness. The modified viscose acetal fibre was characterised by Fourier Transform–infrared spectroscopy and scanning electron microscopy. The results showed that viscose acetal fibre was modified successfully by CHPTAC and that the physical structure did not noticeably change following the modification. The optimum process was determined by establishing the ideal amount of modifier and the modification temperature, as well as the concentrations of sodium hydroxide and soda ash. The results show that the most suitable parameters were 80 g/L for the modifier dosage, a modification temperature of 70°C, 20 g/L of sodium hydroxide and 10 g/L of soda ash. The wet rubbing fastness was grade 4-5 after finishing and dyeing. The exhaustion percentage was significantly higher than that for traditional dyeing, and the K/S and dyeing uniformity were both higher than traditional salt dyeing. Note de contenu : - EXPERIMENTAL : Materials and instruments - Cationic modification of viscose - Dyeing and soaping - Rubbing fastness finishing - Performance testing
- RESULTS AND DISCUSSION : Modification reaction - SEM of the modified fibre - Effect of the amount of CHPTAC on dyeing performance - Analysis of zeta potential on the surface of modified cotton fabric - Effect of CHPTAC dosage on the grafting ratio and dyeing properties - Effect of sodium hydroxide dosage on dyeing properties - Effect of the modification temperature on fabric dyeing performance - Effect of soda ash dosage on the dyeing properties of fabrics - Exhaustion percentage curve of fabric - Fabric fastness testing
- Table 1 : Comparison of dyeing fastness data of salted and non-salt–dyed viscose fabrics
- Table 2 : Comparison of dyeing fastness data of salted and non-salt–dyed viscose fabrics post-treatmentDOI : https://doi.org/10.1111/cote.12598 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12598 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37890
in COLORATION TECHNOLOGY > Vol. 138, N° 4 (08/2022) . - p. 378-387[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23520 - Périodique Bibliothèque principale Documentaires Disponible Properties of a new nitrogen-free additive as an alternative to urea and its application in reactive printing / Chenglong Wang in COLORATION TECHNOLOGY, Vol. 138, N° 2 (04/2022)
PermalinkRegenerated cellulose fibers - great potential for sustainable and tough fiber-reinforced composites / Nina Graupner in CHEMICAL FIBERS INTERNATIONAL, Vol. 72, N° 2 (05/2022)
PermalinkRegenerated cellulose fibers - great potential for sustainable and tough fiber-reinforced composites / Nina Graupner in CHEMICAL FIBERS INTERNATIONAL, (10/2022)
PermalinkPermalinkSeparation of acrylic fibers from waste blends via upcycling technology / Ali Demirci in MAN-MADE FIBERS INTERNATIONAL, Vol. 74, N° 1 (2024)
PermalinkPermalinkStructure and properties of novel hollow viscose fiber / Yue Mao in CHEMICAL FIBERS INTERNATIONAL, (09/2016)
PermalinkStruture and properties of novel hollow viscose fiber / Yue Mao in CHEMICAL FIBERS INTERNATIONAL, Vol. 65, N° 3 (10/2015)
PermalinkStudy on reutilization of wet-blue leather wastes for the production of regenerated leather composite / Cheng Qian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 11 (11/2014)
PermalinkPermalinkThe quasi-yarn-dyed effect : triple dyeing of woven polyester/cationic dyeable polyester/viscose rayon blend fabrics by chemical treatments in the laboratory and on a pilot and an industrial scale / Ilhan Özen in COLORATION TECHNOLOGY, Vol. 128, N° 2 (2012)
PermalinkThermal and flame-resistance behavior of polypropylene fabrics / Vivek Mane in CHEMICAL FIBERS INTERNATIONAL, Vol. 65, N° 3 (10/2015)
PermalinkUse of hardwood pulp for production of high-tenacity viscose fibers / Axel Rußler in CHEMICAL FIBERS INTERNATIONAL, (10/2014)
PermalinkUV protection characteristics of bamboo nonwovens / Ajay Rathod in CHEMICAL FIBERS INTERNATIONAL, Vol. 71, N° 1 (04/2021)
PermalinkUV protection characteristics of bamboo nonwovens / Ajay Rathod in CHEMICAL FIBERS INTERNATIONAL, (10/2021)
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