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COLORATION TECHNOLOGY / Society of dyers and colourists . Vol. 139, N° 4Mention de date : 08/2023Paru le : 21/08/2023 |
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Ajouter le résultat dans votre panierNovel bleach activator compounds derived from the reaction of isocyanic acid with selected nucleophiles / David M. Lewis in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Novel bleach activator compounds derived from the reaction of isocyanic acid with selected nucleophiles Type de document : texte imprimé Auteurs : David M. Lewis, Auteur ; Jamie A. Hawkes, Auteur Année de publication : 2023 Article en page(s) : p. 355-368 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de blanchiment
Chimie textile
Composés organiques -- Synthèse
Détergents
Textiles et tissusIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Laundry detergents commonly contain bleach activators that react with the perhydroxy anion produced from perborate or percarbonate anions to form activated peroxy compounds; these enhance bleaching and stain removal capacity especially at lower temperatures, hydrogen peroxide being an inefficient bleach below 60°C. The most commonly used activators are N, N, N′, N′-tetraacetylethylenediamine (TAED) and sodium nonanoyloxybenzenesulphonate (SNOBS) the former being used across Europe whereas the latter is used widely in the United States and Japan. This research studies the preparation of novel activator compounds which are carbamylated derivatives of selected nucleophiles using either solid or aqueous reactions of nucleophilic carboxylate anions with the highly reactive isocyanic acid entity derived from the acidification of sodium cyanate. The novel activator compounds were then assessed as bleach activators by testing against tea and bilberry-stained cotton reference fabrics at 40°C in the presence of hydrogen peroxide at pH values ranging from 4 to 10; bleaching efficiency was assessed visually and colorimetrically. Results showed that all of the synthesised compounds were more effective bleach activators across the pH range tested than the standard TAED system. Note de contenu : - EXPERIMENTAL : Materials - Methods
- RESULTS AND DISCUSSION : Synthesis of sodil amino(oxo) methanesulphonate "monomer" (SAMS-M) - Synthesis of sodio amino(oxo) methanesulphonate "allophonate" (SAMS-A) - Synthesis of 4-[(aminocarbonyl)oxy]benzenesulphonic acid “monomer” (ACOBS-M) - Synthesis of 4-[(aminocarbonyl)oxy]benzenesulphonic acid “allophonate” (ACOBS-A) - Synthesis of benzoate-O-carbamate (BOCM) - Synthesis of citrate-O-(carboxy) carbamate (COCM) - Activated bleach testing
- Table 1 : Percentage reduction in colour (% Red) after treatment with bleaching solutions
- Table 2 : Conditions used to evaluate varying SAMS-A/hydrogen peroxide concentrations
- Table 3 : Percentage reduction in colour (% Red) after treatment with SAMS-A bleaching solutionsDOI : https://doi.org/10.1111/cote.12662 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12662 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39675
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible Colour-emotion association and colour preference for elder care robot appearance / Ching-Chih Liao in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Colour-emotion association and colour preference for elder care robot appearance Type de document : texte imprimé Auteurs : Ching-Chih Liao, Auteur ; Ya-Han Hsu, Auteur Année de publication : 2023 Article en page(s) : p. 369-384 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse de variance En statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire).
Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia)
Analyse sensorielle
Couleur -- Aspect psychologique
Interaction homme-robot
Personnes âgées -- Protection, assistance, etc.
Robots
Soins infirmiers en gériatrieIndex. décimale : 535.6 Couleur Résumé : With the population ageing in Taiwan, it is projected that elder care robots incorporating smart technologies will play an essential role in ambient assisted living. This research has two purposes: (1) to investigate whether older adults' colour-emotion associations and colour preferences for robot appearance affect their perceptual judgements ; and to explore gender differences in their judgements. Phase I of this research uses a questionnaire to investigate 91 participants' preferences for robot style and their emotional trigger words for the role of robots. Phase II experiments were performed on another 60 older adults to identify whether their colour-emotion associations and colour preferences affect their perceptual judgements. The research results show that, regardless of gender difference, participating older adults prefer a robot with non-human–like features. The results also show that there is no significant difference between males and females in terms of the effect of colour-emotion association on a robot's appearance. Older adults tend to associate warm colours with emotional semantics, such as friendly, comfortable, reassuring, gentle and lively. Preferred colours include red, white and yellow. Black and grey are almost never preferred by older adults. There are significant differences by gender in the preferences for the colours white and purple. Older females prefer purple more, while white is preferred by older males. For the other colours, there were no significant differences between males and females. Colour attributes do not have any effect on colour-emotion association, whereas colour preference is highly positively correlated with b*. Note de contenu : - LITERATURE REVIEW : Definition of care robot - Physical appearance and preference for home care robots - Robot colour studies - Colour image and symbolism - Colour-emotion association - Colour preference
- RESEARCH METHODOLOGY : Phase I: Questionnaire survey - Phase II : Experimental design
- Table 1 : Examples of today's care robots
- Table 2 : Description of the perceived role of robots: a total of 33 adjectives
- Table 3 : Reasons influencing the preference for robot appearance
- Table 4 : Presenting 12 colour samples
- Table 5 : ANOVA of non-human–like robot colour
- Table 6 : Colour-emotion association ranking
- Table 7 : Descriptive statistics and 12 colour-emotion associations
- Table 8 : Colour preference ranking of robots with non-human–like features and the reasons influencing preferences in gender
- Table 9 : Correlation analysis of colour emotion and colour attributeDOI : https://doi.org/10.1111/cote.12653 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12653 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39676
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible Modified guar gum : An alternative source for printing of cotton fabric with reactive dye / Mohammad Khajeh Mehrizi in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Modified guar gum : An alternative source for printing of cotton fabric with reactive dye Type de document : texte imprimé Auteurs : Mohammad Khajeh Mehrizi, Auteur ; Mostafa Jokar, Auteur ; Tayebah Sadeghyan, Auteur ; Mohammad Erfan Azizi, Auteur ; Mohammad Reza Rahmani, Auteur Année de publication : 2023 Article en page(s) : p. 385-394 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Colorants réactifs
CotonLe 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).
Epaississants
Essais (technologie)
Gomme de guarLa gomme de guar est extraite de la graine de la légumineuse Cyamopsis tetragonoloba, où elle sert de réserve d'aliments et d'eau.
La gomme de guar est composée principalement de galactomannane, une fibre végétale soluble et acalorique. Le galactomannane est un polymère linéaire composé d'une chaine de monomères de mannose ((1,4)-beta-D-mannopyranose) auxquelles sont ramifiés par un pont 1-6 une unité de galactose. Le ratio entre le mannose et le galactose est de 2 pour 1, ainsi en moyenne une unité de galactose est ramifié tous les deux mannose sur la chaine. Par comparaison, il est de 4 pour 1 pour la gomme de caroube et 3 pour 1 pour la gomme tara.
La gomme de guar est un additif alimentaire (E4124) largement utilisé dans l'industrie agro-alimentaire. Elle permet notamment d'alléger certaines préparations en remplaçant le rôle de l'amidon, de sucres ou de matières grasses. La gomme de guar est utilisée comme épaississant, stabilisant et émulsifiant dans les aliments grâce à sa texture uniforme et ses propriétés pour former des gels. Elle peut être utilisée dans les sauces, soupes, crèmes glacées et sorbets, produits de boulangerie et de pâtisserie, poudres, etc.
Impression sur étoffes
Mesure
Pâtes d'impression
Photostabilité
Résistance au lavage
Solidité de la couleur
Textiles et tissus imprimésIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The alginate thickener is the thickener frequently used for reactive printing of textile. The thickener responds with reactive pigments and thus does not lead to the fabric composition becoming stiffer. In this study, we prepared oxidised natural guar gum with hydrogen peroxide, sodium hypochlorite and sodium hydroxide. All other polysaccharides comprise reactive hydroxyl units with a stronger reactivity that must be replaced if they are to be used in reactive printing. Guar derivatives were synthesised and verified using Fourier-transform infrared (FTIR) spectroscopy. Natural thickeners, synthetic guar gum derivatives, have been employed in textile printing technique. In comparison to other synthetic thickeners, modified environmental guar gum polymer has been shown to be an ecologically friendly and low-cost thickener. Cotton fabric printed with modified guar thickening with hydrogen peroxide has even stronger colour strength than fabric printed with sodium alginate thickener, which is highly favourable. Penetration properties, colour value, colour strength, colour fastness to washing, light and rubbing was compared with alginate thickener (readily available on the market). Guar gum thickeners showed enhanced features versus sodium alginate for reactive printing. Partially replaced guar gum is an appropriate option due to the colour and physical properties. Note de contenu : - EXPERIMENTAL : Reagents - Modified guar gums - Preparation of the printing paste - Printing process - Measurements and testing
- RESULTS AND DISCUSSION : Effect of thickening agents on colorimetric data - Effect of colour fastness to washing, light and rubbing - Studding of bending of the printed fabrics and effect of thickening agents on return angle of wrinkles - Effect of thickening agents on drop absorption time and water droplet diameter - FTIR results
- Table 1 : Characteristic of C.I. Reactive Red 187
- Table 2 : Characteristic of the printing paste for samples 1–12E
- Table 3 : Characteristic of the printing paste for samples 13–16
- Table 4 : Characteristic of the printing paste for samples 17–19
- Table 5 : Colour value and colour strength of the printed fabrics
- Table 6 : Colour fastness to washing, light and rubbing of printed samples
- Table 7 : Properties of bending length and return angle of wrinkles of samples
- Table 8 : Effect of thickening agents on drop absorption time and water droplet diameterDOI : https://doi.org/10.1111/cote.12657 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12657 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39677
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible Fluoride detection with a colorimetric and fluorescent dual-mode chemosensor / Chanwoo Song in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Fluoride detection with a colorimetric and fluorescent dual-mode chemosensor Type de document : texte imprimé Auteurs : Chanwoo Song, Auteur ; Dongkyun Gil, Auteur ; Jae Jun Lee, Auteur ; Sumin Jung, Auteur ; Cheal Kim, Auteur Année de publication : 2023 Article en page(s) : p. 395-406 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Capteurs chimiques
Colorimétrie
Composés organiques -- Synthèse
Fluorures
Produits chimiques -- DétectionIndex. décimale : 543 Chimie analytique : réactifs, préparations, instruments, méthodes Résumé : We designed a colorimetric and fluorescent dual-mode chemosensor ADM ((E)-2-(((2-amino-4,5-dichlorophenyl)imino)methyl)-6-methoxyphenol) for detecting fluoride (F−). The sensor ADM can detect F− by colour and fluorescence changes. The colour change is from colourless to yellow, and the fluorescence change is a yellow turn-on. With the results of Job plot and electrospray ionisation mass spectrometry, the reaction of F− and ADM turned out to be a 1:1 binding. The detection limits for F− of ADM were 5.00 μM in ultraviolet–visible and 4.16 μM in fluorescence. The detecting process of F− by ADM was demonstrated by ultraviolet–visible and fluorescent titrations, electrospray ionisation mass spectrometry, proton nuclear magnetic resonance titration and theoretical calculations. Note de contenu : - EXPERIMENTAL : General information - Synthesis of sensor ADM - UV–vis and fluorescent titrations - Job plot - 1H NMR titration - UV–vis and fluorescent competition experiments - Density-functional theory and time-dependent density-functional theory calculations
RESULTS AND DISCUSSION : Spectroscopic studies of ADM with F− - Quantum calculations
- Table 1 : Examples of colorimetric and fluorescent chemosensors for detecting F−DOI : https://doi.org/10.1111/cote.12664 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12664 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39678
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible Adsorption removal of Brilliant green and Safranin-O contaminants from water using a hydrogel based on carboxymethyl cellulose and sodium alginate crosslinked by epichlorohydrin / Khushbu in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Adsorption removal of Brilliant green and Safranin-O contaminants from water using a hydrogel based on carboxymethyl cellulose and sodium alginate crosslinked by epichlorohydrin Type de document : texte imprimé Auteurs : Khushbu, Auteur ; Vasudha Vaid, Auteur ; Nivaydita Dagar, Auteur ; Nikhil, Auteur ; Rajeev Jindal, Auteur Année de publication : 2023 Article en page(s) : p. 407-429 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Adsorption
Alginate de sodiumL'alginate de sodium ou polymannuronate sodique, de formule NaC6H7O6 est un additif alimentaire (E401) utilisé dans les boissons, constitué d’alginate et de sodium. Il se présente sous forme de poudre blanche à blanc crème, inodore et sans saveur, très soluble dans l'eau. C'est une longue molécule extraite d'algues brunes, constituée d'unités de glucides reliées ensemble pour former une chaîne.
Caractérisation
Carboxyméthylcellulose
Colloides -- Synthèse
Colorants -- Adsorption
Déchets -- Elimination
Eaux usées -- Décontamination
Eaux usées -- Epuration
ÉpichlorohydrineL'épichlorohydrine ou épichlorhydrine ou 1-chloro-2,3-époxypropane, est un composé organochloré de formule semi-développée CH2CHOCH2Cl, liquide volatil toxique, incolore à forte odeur d'ail. Un atome de carbone de l'épichlorohydrine est chiral, il existe donc deux formes énantiomères de ce composé.
hydrocolloïdes
Mesure
Réticulation (polymérisation)Index. décimale : 667.3 Teinture et impression des tissus Résumé : The current study investigates the adsorption properties of a chemically crosslinked hydrogel based on sodium alginate (NaALG) and carboxymethyl cellulose (CMC). The structural characteristics of the investigated hydrogel are described using information from Fourier Transform–infrared spectra, X-ray diffraction patterns and field emission scanning electron microscopy pictures. The NaALG/epichlorohydrin (ECH)/CMC hydrogel was synthesised under optimised conditions with respect to the swelling percentage. Various reaction parameters were varied to obtain the maximum swelling percentage. The synthesised hydrogel was taken as an adsorbent in the decolorisation of Brilliant green (BG) and Safranin-O (SO) dyes from water. According to the kinetic investigations, the decolorisation equilibrium of SO by NaALG/ECH/CMC was discovered in 4 hours (98.98%), while the removal of BG by NaALG/ECH/CMC took 6 hours (97.7%). Chemical processes were used to describe the decolorisation mechanisms, which significantly supported the pseudo-first-order model. NaALG/ECH/CMC hydrogel absorption was indicated to take place in monolayer adsorption form (Langmuir isotherm). The highest adsorption capacity for BG was discovered to be 864.8 mg g−1 and for SO it was 193.1 mg g−1, by synthesised hydrogel, where “mg” refers to the commercial colourant and not to the pure dye. Therefore, the synthesised hydrogel can be considered as a smart device for the adsorption of dye in water purification tasks. Note de contenu : - EXPERIMENTAL : Materials - Preparation of NaALG/ECH/CMC-based super adsorbent hydrogel (In Air) - Characterisation - Water absorbency measurement - Adsorption studies - Kinetics of adsorption - Adsorption equilibrium
- RESULTS AND DISCUSSION : Adsorbent synthesis and mechanism - Optimisation of various parameters - Characterisation - Mechanism for the adsorption of dyes (BG and SO) - Optimised parameter for adsorption of BG and SO - Adsorption kinetics - Adsorption isotherms - Desorption and reusability studies - Comparative analysis of dye adsorption capacity with other absorbents
- Table 1 : Optimisation table of various reaction parameters responsible for the swelling percentage of the NaALG/ECH/CMC hydrogel
- Table 2 : Coherence length, d-spacing of CMC, NaALG and the NaALG/ECH/CMC hydrogel
- Table 3 : Kinetic constants for the adsorption of BG and SO dyes on the NaALG/ECH/CMC hydrogel
- Table 4 : Various adsorption isotherms for the adsorption of BG and SO dyes on the NaALG/ECH/ALG hydrogel at optimised concentrations
- Table 5 : Comparison of NaALG/ECH/CMC with other absorbentsDOI : https://doi.org/10.1111/cote.12655 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12655 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39679
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible The effect of zinc oxide nanoparticles on the weathering performance of wood-plastic composites / Sefa Durmaz in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : The effect of zinc oxide nanoparticles on the weathering performance of wood-plastic composites Type de document : texte imprimé Auteurs : Sefa Durmaz, Auteur ; Ozlem Ozgenc Keles, Auteur ; Ugur Aras, Auteur ; Yusuf Ziya Erdil, Auteur ; Fatih Mengeloglu, Auteur Année de publication : 2023 Article en page(s) : 430-440 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbeurs de rayonnement ultraviolet
Analyse spectrale
Colorimétrie
Composites à fibres -- Additifs
Composites à fibres -- Détérioration
Composites à fibres végétales
Composites à fibres végétales -- Propriétés mécaniques
Composites à matrice organique
Essais accélérés (technologie)
Microscopie
Nanoparticules
Oxyde de zinc
Réflexion totale atténuée
Résistance au rayonnement ultraviolet
Solidité de la couleur
StatistiqueIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In recent years, wood-plastic composites (WPCs) have become among the most popular engineering materials. Most of their usage areas are outdoors, where they encounter various damaging factors. The weathering conditions cause significant deterioration to WPC surfaces, which negatively influences their service life. In this study, zinc oxide nanoparticles at different concentrations (1%, 3%, 5%, 10%) were added to a high-density polyethylene-based WPC matrix. The effect of zinc oxide nanoparticles on the weathering performance of WPC was evaluated after 840 hours of an artificial weathering test. The highest colour changes (∆E*) were monitored with control samples exposed for 840 hours. Adding zinc oxide nanoparticles improved the ultraviolet (UV) resistance and decreased the colour changes. The wood flour content also affected the colour changes on the WPC surface. A combination of 10% zinc oxide nanoparticles and 50% wood flour content provided the lowest colour changes. The barrier effect of nanoparticles protected the WPC surfaces from UV light. Zinc oxide nanoparticles also positively affected the load transfer, which restricted the reduction in mechanical properties after the weathering test. The degradation on the surface of WPCs was also investigated using attenuated total reflectance-Fourier Transform–infrared analysis. The changes in the characteristic bands of polymer and wood indicated that surface degradation was inevitable. Light and scanning electron microscopy images also demonstrated micro-cracks and roughness on the surface of WPCs. It is concluded that UV degradation is unavoidable, but zinc oxide nanoparticles can improve surface resistance against weathering conditions. Note de contenu : - EXPERIMENTAL : Materials - WPC production - Accelerated UV weathering test - Colour measurement - ATR-FTIR spectroscopy analysis - Mechanical properties - Microscopic analysis - Statistical analysis
- RESULTS AND DISCUSSION : Mechanical properties - Colour changes - ATR-FTIR spectroscopy analysis - Light microscopy analysis - Scanning electron microscopy analysis
- Table 1 : The wood flour, polymer and nanoparticle content
- Table 2 : The mechanical properties of WPCsDOI : https://doi.org/10.1111/cote.12666 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12666 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39680
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible Investigation and feed-forward neural network-based estimation of dyeing properties of air plasma treated wool fabric dyed with natural dye obtained from Hibiscus sabdariffa / Zeynep Omerogullari Basyigit in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Investigation and feed-forward neural network-based estimation of dyeing properties of air plasma treated wool fabric dyed with natural dye obtained from Hibiscus sabdariffa Type de document : texte imprimé Auteurs : Zeynep Omerogullari Basyigit, Auteur ; Can Eyupoglu, Auteur ; Seyda Eyupoglu, Auteur ; Nigar Merdan, Auteur Année de publication : 2023 Article en page(s) : p. 441-453 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants végétaux
Laine
Réseaux neuronaux (informatique)
Résistance à l'abrasion
Résistance au lavage
Solidité de la couleur
Surfaces -- Analyse
Technique des plasmas
Teinture -- Fibres textiles
UltrasonsIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In the colouring processes of textile products, more environmentally friendly chemicals and finishing methods should be used instead of conventional ones that harm the environment every day, so that alternative realistic ways to protect nature, both academically and industrially, could be possible. Due to some inconveniences caused by synthetic dyes that are widely used today, in this study, ultrasonic dyeing of wool fabric with Hibiscus sabdariffa was carried out after environmental-friendly air vacuum plasma application which increased the absorption of the dyes into the textile material. According to the performance results, colour strengths of the wool fabrics were increased significantly. Surface morphology analysis was carried out and etching effects of air vacuum plasma treatment were clearly seen on the micrographs of the treated wool fabrics. An environmental-friendly green process was achieved through this study and it was concluded that vacuum air plasma treatment could be an alternative green-process as a pretreatment to increase the dye up-take of natural dyeing treatment. Moreover, in this study, a feed-forward neural network (FFNN) model was presented and used for predicting the dyeing properties (L, a, b and K/S) of samples. The experimental results showed that the presented model achieves the regression values greater than 0.9 for all dyeing properties. Consequently, it was considered that the proposed FFNN was successfully modelled and could be efficiently utilised for dyeing characteristics of wool fabrics dyed with natural dye extracted from Hibiscus sabdariffa. Note de contenu : - MATERIALS AND METHODS : Materials - Method
- RESULTS AND DISCUSSION : Colour results - Fastness results -
Scanning electron microscope analysis results - Fourier-transform infrared analysis results - Feed-forward neural network-based results
- Table 1 : CIELab L, a, b and ΔE values of samples
- Table 2 : The K/S values of all wool fabrics at 540 nm
- Table 3 : Washing and rubbing fastness results of samples
- Table 4 : Regression results of the proposed feed-forward neural network (FFNN) model for the dyeing properties of samplesDOI : https://doi.org/10.1111/cote.12665 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12665 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39681
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible Instrumental shade sorting of coloured fabrics using genetic algorithm and particle swarm optimisation / Elham Hasanlou in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Instrumental shade sorting of coloured fabrics using genetic algorithm and particle swarm optimisation Type de document : texte imprimé Auteurs : Elham Hasanlou, Auteur ; Ali Shams Nateri, Auteur ; Hossein Izadan, Auteur Année de publication : 2023 Article en page(s) : p. 454-463 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algorithmes génétiques
Colorimétrie
Dispositifs de tri
Optimisation par essaims particulairesL'optimisation par essaims particulaires (OEP ou PSO en anglais) est une métaheuristique d'optimisation, inventée par Russel Eberhart (ingénieur en électricité) et James Kennedy (socio-psychologue) en 1995.
Algorithme
Cet algorithme s'inspire à l'origine du monde du vivant. Il s'appuie notamment sur un modèle développé par Craig Reynolds à la fin des années 1980, permettant de simuler le déplacement d'un groupe d'oiseaux. Une autre source d'inspiration, revendiquée par les auteurs, James Kennedy et Russel Eberhart, est la socio-psychologie.
Cette méthode d'optimisation se base sur la collaboration des individus entre eux. Elle a d'ailleurs des similarités avec les algorithmes de colonies de fourmis, qui s'appuient eux aussi sur le concept d'auto-organisation. Cette idée veut qu'un groupe d'individus peu intelligents peut posséder une organisation globale complexe.
Ainsi, grâce à des règles de déplacement très simples (dans l'espace des solutions), les particules peuvent converger progressivement vers un minimum global. Cette métaheuristique semble cependant mieux fonctionner pour des espaces en variables continues. (Wikipedia)
Textiles et tissus teintsIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In the present research by combination of Clemson Colour Clustering (CCC) instrumental shade sorting method and two metaheuristic algorithms, a genetic algorithm (GA) and a particle swarm optimisation (PSO), two new shade sorting methods, called CCCGA and CCCPSO were proposed. Then these proposed methods were applied on 16 well-prepered colour sets made of coloured fabrics and their results were compared using some important performance evaluation factors. The results of the methods were also compared with conventional CCC shade sorting method and a method based on CCC combined with k-means technique (CCCk). The results obtained from various shade sorting methods showed that the CCCGA and CCCPSO methods successfully sorted the coloured fabrics with high efficiency, and their results slightly outperformed the results of the CCC method. Note de contenu :
- INTRODUCTION : Genetic algorithm - Particle swarm optimisation
- MATERIALS AND METHODS : Preparation of samples and colour measurement - Determining the colour tolerance of coloured fabrics - Shade sorting using the genetic algorithm - Shade sorting using particle swarm optimisation
- RESULTS AND DISCUSSION : Performance evaluation factors of shade sorting methods - Number of sorted groups - Colour variation within the groups - Compactness of the points in sorted groups - Utilisation of the fabric
- Table 1 : Specifications and colour tolerance of the 16 fabric colour sets
- Table 2 : The values of the parameters and genetic operators used in the genetic algorithm
- Table 3 : The values of the parameters used in the particle swarm optimisation
- Table 4 : The colour variation within the groups formed by various shade sorting methods and the number of sorted groups by Clemson Colour Clustering (CCC) shade sorting
- Table 5 : The compactness of the points in sorted groups by different shade sorting methods
- Table 6 : The number of groups containing only one sample and the percentage of groups in low utilisation by different shade sorting methodsDOI : https://doi.org/10.1111/cote.12663 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12663 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39682
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible Spectroscopic study of lactonic rhodamine B immobilised on polytetrafluoroethylene porous film / Shohei Yamaguchi in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Spectroscopic study of lactonic rhodamine B immobilised on polytetrafluoroethylene porous film Type de document : texte imprimé Auteurs : Shohei Yamaguchi, Auteur ; Iori Umeki, Auteur ; Megumi Nagashima, Auteur ; Daisuke Yamamoto, Auteur ; Terumitsu Ishii, Auteur ; Akira Hashimoto, Auteur ; Kazunori Matsui, Auteur Année de publication : 2023 Article en page(s) : p. 464-474 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Films plastiques
Lactones
Matériaux poreux
Polytétrafluoréthylène
Rhodamine
Stabilité chimique
TeintureIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Rhodamine B (RB) is frequently used in chemical sensors, where the sensing principle depends on its structural changes to lactone (L), zwitterion (Z), and cation (C) forms in response to the local environment. Compared to the Z- and C-forms, stabilising the L-form in matrices is difficult because of the required low environmental polarity. In this study, we report a simple and easy method to stabilise the L-form of RB on the surface of a polytetrafluoroethylene porous film (p-PTFE), in which the film is dipped in an ethanol solution containing RB and dried. This phenomenon was not observed on polyethylene film and cellulose filter paper in RB solutions. Furthermore, a chemical stability test for colourless RB/p-PTFE samples was conducted by exposing these samples to a humid environment. The test result indicated that, with an increase in the environmental humidity, the equilibrium shifted from the L-form to the Z-form of RB immobilised on the p-PTFE film. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - Chemical stability test - Instrumental analysis
- RESULTS AND DISCUSSION : Dyeing of PTFE, PE and CFP - UV-Vis study of RB in solutions - UV-Vis study of RB-immobilised p-PTFE and PE films, and CFP - IR study of RB-immobilised p-PTFE and PE films, and CFP - Effect of humidity on the chemical stability of lactonic RB-immobilised p-PTFE films
- Table 1 : Dyeing results of PTFE, PE and CFP samples dipped in RB solution
- Table 2 : Characteristic IR absorption bands (cm−1) and vibration mode assignments based on.14 Rhodamine B base and Rhodamine powders are abbreviated as LRB and CRB, respectivelyDOI : https://doi.org/10.1111/cote.12659 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12659 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39683
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Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible Supercritical carbon dioxide (SC-CO2) dyeing of cellulose acetate : An opportunity for a "greener" circular textile economy / Peter J. Broadbent in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : Supercritical carbon dioxide (SC-CO2) dyeing of cellulose acetate : An opportunity for a "greener" circular textile economy Type de document : texte imprimé Auteurs : Peter J. Broadbent, Auteur ; Chris M. Carr, Auteur ; David M. Lewis, Auteur ; Muriel Rigout, Auteur ; Ernst J. Siewers, Auteur ; Narjes Shojai Kaveh, Auteur Année de publication : 2023 Article en page(s) : p. 475-488 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acétate de cellulose L'acétate de cellulose est une matière plastique inventée en 1865. C'est l'ester acétate de la cellulose.
AlizarineL'alizarine est un colorant rouge d'origine végétale, extrait de la racine de la garance des teinturiers (Rubia tinctorum L.), une plante vivace de la famille des Rubiacées, autrefois largement cultivée pour la teinture qu'elle fournissait.
Colorants dispersésCatégorie 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.
Dioxyde de carbone
Fibres polyesters
Fluides supercritiques
Mélanges de fibres
Solutions aqueuses (chimie)
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : This article compares the dyeing of cellulose diacetate (cellulose-based) and polyester fabrics using supercritical carbon dioxide (SC-CO2) and aqueous media. The benefits of dyeing in SC-CO2 were clearly demonstrated in laboratory-based and pilot-scale studies in terms of increased colour strength, uniformity, fastness and the absence of auxiliaries such as dispersing agents or surfactants. In addition, the “super-levelling” nature of the SC-CO2 medium was demonstrated in the reprocessing of polyester “waste textile” and the re-use of the “locked-in waste” colourant. The SC-CO2 processing medium can be utilised to accurately colour “multiple life” polyester and cellulose acetate uniformly and to creatively tie-dye polyester and cellulose acetate fabrics. Through SC-CO2 fluid technology, we can envisage a viable waterless circular manufacturing and recycling/remanufacturing framework for the predominantly polyester global fibre market coupled to the sustainably sourced, biodegradable cellulose diacetate as a replacement for cotton. The key technical and commercial advantages being the use of a single solvent dye class for both polyester and the cellulose diacetate, saving on energy costs, integrated simpler processing, reduced water usage and associated efficient recycling. Further, repositioning the cellulosic fibre industry towards using sustainable forests is attractive in terms of improved land, water and environmental management. Note de contenu : - EXPERIMENTAL : Materials - Laboratory-scale SC-CO2 dyeing of cellulose diacetate fabric with Corangar dyes - Conversion of SC-CO2 Corangar dyes to analogous Leeds Disperse Dyes and laboratory-scale aqueous dyeing of cellulose diacetate fabric - Pilot scale SC-CO2 dyeing of Naia™ (cellulose diacetate) fabrics and recycled polyester/Naia blend fabric with Corangar dyes - Alizarin dyeing
“Superlevelling” of SC-CO2 Corangar and disperse dyes in SC-CO2 medium - Transfer printing - Colour wash fastness tests - Crock fastness - Light fastness
- RESULTS AND DISCUSSION : Overview - SC-CO2 dyeing of cellulose diacetate - Pilot scale dyeing of cellulose acetate (Naia) and recycled polyethylene terephthalate (RPET)/cellulose acetate (Naia) blend fabrics
- RECYCLING AND REMANUFACTURING IN POLYESTER AND CELLULOSE ACETATE : Superlevelling properties of SC-CO2 and potential for recycling/remanufacturing "waste" textiles - Novel structural dyeing (tie-dyeing) of fabrics in the SC-CO2 mediumDOI : https://doi.org/10.1111/cote.12690 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12690 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39684
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