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The role of inorganic electrolyte (salt) in cellulosic fibre dyeing : Part 1 fundamental aspects / Stephen M. Burkinshaw in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 421-444 Titre : The role of inorganic electrolyte (salt) in cellulosic fibre dyeing : Part 1 fundamental aspects Type de document : texte imprimé Auteurs : Stephen M. Burkinshaw, Auteur Année de publication : 2021 Article en page(s) : p. 421-444 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants Composés inorganiques 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). Electrolytes Fibres cellulosiques Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : This review concerns the application of dyes to both natural and man-made cellulosic fibres from aqueous dyebaths using exhaust dyeing processes and the role of added inorganic electrolyte in such dyeing systems. This part of the article presents a review of the fundamental properties and characteristics of cellulosic fibres and each of the five classes of dye employed for their coloration, as well as the essential principles involved in the application of the various types of dye to cellulosic fibres. In the next part of the article, the various theories and concepts which have been proposed to account for the promotional effect exerted by added inorganic electrolyte on dye uptake are reviewed and scrutinised, from the viewpoints of the essential physico-chemical properties of the five classes of dye that are used and the fundamental aspects of their application. Note de contenu : - Water - Cellulosic fibres - Dye classes - Dyeing conditions used - Inorganic electrolyte DOI : https://doi.org/10.1111/cote.12547 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12547 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36487 [article]

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The effect of paper surface-coating pigments and binders on colour gamut and printing parameters / Arif Ozcan in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 445-455 Titre : The effect of paper surface-coating pigments and binders on colour gamut and printing parameters Type de document : texte imprimé Auteurs : Arif Ozcan, Auteur ; Mustafa Tutak, Auteur Année de publication : 2021 Article en page(s) : p. 445-455 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcool polyvinylique Argile Calandrage Le calandrage est une opération qui consiste à faire passer un matériau entre deux cylindres pour le lisser ou le lustrer, ou pour produire un film ou une feuille. Des matériaux de plus faible épaisseur (produits semi-finis, feuilles, plaques, films, crêpes) peuvent être obtenus par calandrage d'un système thermoplastique ou élastomère entre des cylindres éventuellement chauffants. Une calandreuse comporte au moins deux rouleaux contrarotatifs, dont l'écartement est ajustable. Plusieurs passages entre les cylindres peuvent être réalisés. Cette opération est par exemple utilisée pour fabriquer des revêtements de sols et de murs, des nappes, de l'ameublement, de la maroquinerie et des articles gonflables. Pour les pâtes de faible viscosité, une calandreuse peut servir de mélangeur en formulation. En papeterie, l'opération de calandrage permet d'obtenir différents états de surface de la feuille de papier, notamment pour les papiers couchés. Selon le degré de calandrage (pression, température de chauffe), le papier sera plus ou moins lissé et brillant. Calcaire Caoutchouc styrène-butadiène Colorimétrie Formulation (Génie chimique) Impression numérique Latex Liants Papier -- Revêtements Papier et carton couché Pigments inorganiques Revêtements organiques Zéolites Index. décimale : 686.23 Impression Résumé : One of the most important factors affecting the printing quality of printing processes is the surface structure of the printing material. The surface structure of the paper formed by fibres can be modified and smoothed out using coatings that make it more suitable for printing. In this study, three different types of coating pigments were prepared and applied onto an 80 g/m2 base paper surface. Styrene butadiene latex and polyvinyl alcohol were used as binders, and three different types of pigments, precipitated calcium carbonate, clay and zeolite, were used as pigments in the prepared coatings. The physical and optical properties of all calendered and non-calendered papers were measured and compared. All the prints were produced with an ink-jet digital printing machine upon the coated and calendered papers for recording the printability parameters. The ΔE00 differences between colours, tone values, colour gamuts and colour gamut volumes were measured from the surfaces of the printed papers. The results showed that the coating type had a better effect on print quality, and that the printability properties of coated papers and even calendered papers were very good. Note de contenu : - Table 1 : Physical and optical properties of base paper - Table 2 : Coating formulation - Table 3 : Physical and optical properties of coated and calendered papers with precipitated calcium carbonate (PCC) - Table 4 : Physical and optical properties of coated and calendered papers with clay - Table 5 : Physical and optical properties of coated and calendered papers with zeolite - Table 6 : Comparison of the ΔE00 colour difference values for base paper and coated papers according to ISO 12647-2, paper type 4 - Table 7 : Colour gamut volumes obtained using ColorThink Pro v.3 DOI : https://doi.org/10.1111/cote.12540 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12540 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36488 [article]

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Investigating the in-solution photodegradation pathway of diamond green G by chromatography and mass spectrometry / Francesca Sabatini in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 456-467 Titre : Investigating the in-solution photodegradation pathway of diamond green G by chromatography and mass spectrometry Type de document : texte imprimé Auteurs : Francesca Sabatini, Auteur ; Ilaria Degano, Auteur ; Maarten van Bommel, Auteur Année de publication : 2021 Article en page(s) : p. 456-467 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse qualitative (chimie) Analyse quantitative (chimie) Caractérisation Colorants Diméthylsulfoxyde Eau Photodétérioration Solutions (chimie) Teinture -- Fibres textiles Vert Index. décimale : 667.3 Teinture et impression des tissus Résumé : Diamond Green G (CI 42040, Basic Green 1) is a triarylmethane dye mostly employed in the industrial dyeing of miscellaneous natural and artificial textile fibres, in the production of printing inks and as an anti-fungal agent for aquaculture products. Diamond Green (DG) tends to fade under light irradiation, similar to several other dyes and pigments belonging to the triarylmethane family. In this paper, an in-solution degradation study was carried out to shed light on DG photostability. The experiments were performed by artificially irradiating DG in water and dimethyl sulphoxide, and analysing aliquots sampled at different time intervals by ultra-high performance liquid chromatography coupled with diode array detector quadrupole and time of flight tandem mass spectrometry. The degradation products formed were characterised and the product-ion spectra discussed and interpreted. On the basis of the structure of the identified compounds and their kinetic trend in relation to the accelerated ageing time, degradation mechanisms were proposed for DG, taking into account the role played by the solvent. Finally, the dyeing formulation of an historical textile sample, collected from a stage costume worn in a Zeffirelli lyric opera, was determined utilising the information collected from the analysis of irradiated DG solutions. Note de contenu : - MATERIALS AND METHODS : Chemicals - Photo-ageing in-solution experiment - Historical sample - Apparatus - RESULTS AND DISCUSSION : In-solution study : qualitative analysis - In-solution study : semi-quantitative analysis - Analysis of an historical textile sample DOI : https://doi.org/10.1111/cote.12538 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12538 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36489 [article]

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Development of a novel three-dimensional printing technology for the application of "raised" surface features / David M. Lewis in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 468-474 Titre : Development of a novel three-dimensional printing technology for the application of "raised" surface features Type de document : texte imprimé Auteurs : David M. Lewis, Auteur ; Peter J. Broadbent, Auteur ; Muriel Rigout, Auteur ; Chris M. Carr, Auteur ; Fearne Johnson, Auteur Année de publication : 2021 Article en page(s) : p. 468-474 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Encre d'imprimerie Impression jet d'encre Impression tridimensionnelle Index. décimale : 667.4 Encres Résumé : A simple procedure to ink-jet print raised images using two water-soluble inorganic inks is reported and it has the potential to be utilised in domestic and commercial environments. The advantages of such a procedure lies in the ability to print moulded objects, Braille type and to engineer special gonio-specific effects that may have value in the security printing area. The study focuses on printing gypsum through the ready precipitation of calcium sulphate dihydrate by co-jetting calcium chloride and ammonium sulphate solutions. The results in this preliminary study are encouraging and offer a potential method for durable surface structuring of material surfaces with haptic and visual effects for both the blind and the sighted. Note de contenu : - Concurrent cartridge printing - Sequential cartridge printing - Braille printing - Smart printing DOI : https://doi.org/10.1111/cote.12541 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12541 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36490 [article]

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Simultaneous low-salt dyeing and anti-bacterial finishing of cotton fabric with reactive dye and N-halamine / Meng Zhang in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 475-483 Titre : Simultaneous low-salt dyeing and anti-bacterial finishing of cotton fabric with reactive dye and N-halamine Type de document : texte imprimé Auteurs : Meng Zhang, Auteur ; Yan Zhang, Auteur ; Ying Liu, Auteur ; Xuehong Ren, Auteur ; Tung-Shi Huang, Auteur Année de publication : 2021 Article en page(s) : p. 475-483 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens Caractérisation Cationisation Chloration 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). N-halamine Résistance à la rupture Résistance au lavage sels -- Réduction Sels de sodium Teinture -- Fibres textiles Volumétrie (chimie analytique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : A reactive dye, Novacron Deep Orange S-4R, and an anti-bacterial precursor, 4-(4-(2,2,6,6-tetramethyl-4-piperidinol)-6-chloro-1,3,5-triazinylamino)-benzenesulphonate, both of which are monohalogenated-s-triazine–based compounds, were chosen for the simultaneous dyeing and anti-bacterial finishing of cotton fabric. To effectively reduce the emissions of pollutants and the dosage of sodium sulphate added during dyeing and finishing, a cationisation reagent, 2,3-epoxypropyltrimethylammonium chloride, was used to modify cotton fabric before dyeing and finishing. The cationised cotton fabrics obtained 0.18% active chlorine loadings and good dye depth after the simultaneous dyeing and finishing process with low addition of sodium sulphate. The chlorinated fabrics inactivated all inoculated Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) within 10 minutes of contact. The treated cotton fabric maintained high breaking strength as well as good washing stability. Note de contenu : - EXPERIMENTAL : Materials - Instruments - Preparation of anti-bacterial dyed cotton fabric with NDO and BTMPT - Chlorination and titration - Anti-bacterial test - Washing stability test - Breaking strength test - Fastness tests - RESULTS AND DISCUSSION : Characterisation of cationised cotton treated with NDO and BTMPT - The effect of cationised cotton treated with EPTMAC on chlorine loadings - The effect of simultaneous process conditions on the chlorine loadings and colour of cationised cotton treated with NDO and BTMPT - Washing stability and breaking strength - Anti-bacterial properties - Fastness properties - Table 1 : The effect of cationisation of cotton fabric DOI : https://doi.org/10.1111/cote.12542 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12542 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36504 [article]

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Reuse of textile wastewater treated by moving bed biofilm reactor coupled with membrane bioreactor / Xuefei Yang in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 484-492 Titre : Reuse of textile wastewater treated by moving bed biofilm reactor coupled with membrane bioreactor Type de document : texte imprimé Auteurs : Xuefei Yang, Auteur ; Víctor López-Grimau, Auteur ; Mercedes Vilaseca, Auteur ; Martí Crespi, Auteur ; Judit Ribera-Pi, Auteur ; Montse Calderer, Auteur ; Xavier Martinez-Llado, Auteur Année de publication : 2021 Article en page(s) : p. 484-492 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biofilms Bioréacteurs Eaux usées -- Analyse Eaux usées -- Recyclage Filtration Membranes (technologie) Teinture -- Fibres textiles Textiles et tissus -- Industrie Index. décimale : 667.3 Teinture et impression des tissus Résumé : A laboratory-scale pilot plant of moving bed biofilm reactor coupled with membrane bioreactor (MBBR-MBR) was studied with regard to wastewater treatment in the textile industry, and the reuse feasibility of treated water was investigated. The pilot plant comprised two connected parts: an aerobic tank filled with carriers and a submerged membrane tank. The MBBR-MBR system reduced the hydraulic retention time to 1 day, which is very promising compared with conventional biological treatment in the textile industry. The removal efficiency of chemical oxygen demand reached 93%, which is almost the maximum for a biological process treating this type of wastewater, as well as the colour removal performance, which achieved 85%. Additionally, 99% of total suspended solids were removed due to filtration. Furthermore, new dyeing processes reusing the treated water were performed. The quality of the new dyed fabrics with treated water was compared with reference fabrics. Colour differences between new dyed fabrics and reference fabrics were found to be within the general requirement of the textile industry (ΔECMC(2:1) < 1). The reuse of treated water in new dyeing processes is beneficial both for the industry and for the environment, because the textile sector is an intensive water consumer during both the dyeing and finishing processes. Note de contenu : - METHODS : Characteristics of textile wastewater - Reactor set-up - Reuse of treated water in new dyeing processes - Analytical methods - RESULTS AND DISCUSSION : HRT and mixed liquor suspended solids - Removal of COD - Colour removal - TSS and turbidity removal - Reuse of the treated effluent and salt (sodium chloride) - Table 1 : Wastewater characteristics - Table 2 : Carrier characteristics - Table 3 : Membranes characteristics - Table 4 : Chromatic coordinates and colour differences between fabrics dyed with the treated effluent and a reference dyeing process DOI : https://doi.org/10.1111/cote.12543 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12543 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36505 [article]

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Effect of colourants on the optical characteristics and structure of Y2O3 stabilised tetragonal zirconia ceramic / Jianfeng Chen in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 493-502 Titre : Effect of colourants on the optical characteristics and structure of Y2O3 stabilised tetragonal zirconia ceramic Type de document : texte imprimé Auteurs : Jianfeng Chen, Auteur ; Ning Wen, Auteur ; Chundong Xue, Auteur ; Zhaocen Liu, Auteur ; Zhuroan Liang, Auteur ; Bo Wang, Auteur ; Lisheng Zhao, Auteur ; Ruijie Dang, Auteur ; Ningfang Liao, Auteur ; Guanghai Dai, Auteur Année de publication : 2021 Article en page(s) : p. 493-502 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorimétrie Matériaux céramiques Oxyde d'yttrium Oxyde de cérium Oxyde de fer Statistique Transmittance La transmittance, en général, est le rapport caractérisant la transmission d'une grandeur dans un système. Elle se calcule par le rapport entre la grandeur en entrée et en sortie. En optique, la transmittance d'un matériau ou d'un filtre est la fraction du flux lumineux le traversant. Elle est également nommée facteur de transmission mais aussi transparence dans le domaine de la photographie. Zircone Le dioxyde de zirconium ou oxyde de zirconium(IV) couramment appelée zircone est un composé inorganique du zirconium de formule ZrO2. Ce matériau est une céramique technique d'aspect opaque. Appelé CZ (Cubic Zirconia) lorsque transparent, il est utilisé pour imiter le diamant. Il ne faut pas le confondre avec le zircon (ZrSiO4). Sous sa forme tétragonale, l'oxyde de zirconium est un matériau a vocation mécanique, cette évolution cristallographique lui confère une dureté très élevée (1200Hv) ainsi qu'une bonne résistance aux sollicitations mécaniques (700Mpa en traction et 2000Mpa en compression). Une fois polie, la zircone tétragonale peut atteindre un Ra de 0,02, ce qui permet de l'utiliser pour des pièces de frottement. Index. décimale : 667.3 Teinture et impression des tissus Résumé : The present study is to investigate the effect of metal oxides Fe2O3 and CeO2 on the optical characteristics and structure of Y2O3 stabilised tetragonal zirconia ceramic (Y-TZP). It is found that the addition of Fe2O3 and CeO2 not only changes the colour of Y-TZP, but also reduces the light transmittance. Meanwhile, the scanning electron microscopy (SEM) characterisation and X-ray diffraction (XRD) analysis show that the combination of Y-TZP and the colourant is stable and the structure is uniform. Our findings can improve the understanding of coloration of Y-TZP by metal oxides, and support a quantitative assessment approach for aesthetic performance of dental restoration material. Note de contenu : - EXPERIMENTAL AND METHODS : Specimen preparation - Colour measurement - Transmittance measurement - Structure characterisation - Statistical analysis - RESULTS AND DISCUSSION : Effect of colourants on colour of Y-TZP - Effect of colourants on transmittance of Y-TZP - Interpretation in terms of microstructure and crystal structure - Table 1 : Effect of Fe2O3 on transmittance - Table 2 : Effect of CeO2 on transmittance - Table 3 : Effect of FeO3 and CeO2 on transmittance DOI : https://doi.org/10.1111/cote.12546 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12546 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36506 [article]

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Influence of carbon black with different polar groups on the solvent N-methylmorpholine N-oxide / Hong Jin in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 503-511 Titre : Influence of carbon black with different polar groups on the solvent N-methylmorpholine N-oxide Type de document : texte imprimé Auteurs : Hong Jin, Auteur ; Alex Kwasi Kumi, Auteur ; Yumei Zhang, Auteur Année de publication : 2021 Article en page(s) : p. 503-511 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions Dynamique moléculaire Fibres cellulosiques Granulométrie N-méthylmorpholine N-oxyde Noir de carbone Rayonnement ultraviolet solvants Stabilité chimique Index. décimale : 667.3 Teinture et impression des tissus Résumé : To confirm the effect of the surface property of carbon black (CB) on the lyocell process and the chemical stability of the solvent N-methylmorpholine N-oxide (NMMO), molecular dynamics simulation and ultraviolet tests were performed to investigate the interaction between aqueous NMMO solution and CB surfaces with different polar groups. The hydrophobic interaction between the O2 atom of NMMO and the unmodified CB surface increased with an increase in NMMO concentration. The interaction improved the dispersion of CB in aqueous NMMO solution, but this effect was not sufficient to prevent the aggregation between CB particles. Modifying the CB surface with a 1%-3% carboxyl or amino group produced a stronger electrostatic interaction between the polar groups and the solvent molecules; however, the carboxyl group had a significant influence on the chemical stability of NMMO. The amino group can realise the stable dispersion of CB in aqueous NMMO solutions without affecting the chemical stability of NMMO, which would be the best choice for preparation of functional lyocell fibre. Note de contenu : - EXPERIMENTAL : MD simulations - Materials - Dispersion process and particle size analysis - UV testing of the recovered solvent - RESULTS AND DISCUSSION : Interactions between the unmodified CB surface and aqueous NMMO solution - Influence of the surface groups upon the hydrophilic property of CB - Influence of different types of CB on NMMO recovery in the lyocell process - Table 1 : Composition details of the aqueous N-methylmorpholine N-oxide (NMMO) solution models after optimisation - Table 2 : Parameters of carbon black (CB samples used for dope - Table 3 : X-ray photoelectron spectroscopy results for the three types of carbon black (CB) particles and CB surface models in simulation - Table 4 : Average interaction energy between the molecules and the carbon black (CB) surface and its composition (kcal mol-1) - Table 5 : Interaction energies between the water cluster and the carbon black (CB) surfaces and its composition (kcal mol-1) DOI : https://doi.org/10.1111/cote.12544 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12544 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36507 [article]

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An effective colorimetric sensor for detecting Cu2+ based on benzothiazole moiety / Boeon suh in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 512-519 Titre : An effective colorimetric sensor for detecting Cu2+ based on benzothiazole moiety Type de document : texte imprimé Auteurs : Boeon suh, Auteur ; Donghwan Choe, Auteur ; Cheal Kim, Auteur Année de publication : 2021 Article en page(s) : p. 512-519 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Capteurs (technologie) Colorimétrie Composés organiques -- Synthèse Ions cuivre Index. décimale : 667.3 Teinture et impression des tissus Résumé : An effective colorimetric chemosensor, 2,4-dichloro-6-((E)-(((Z)-3-methylbenzo[d]thiazol-2(3H)-ylidene)hydrazono)methyl)phenol (HMD), was synthesised for Cu2+ detection. HMD with benzothiazole moiety showed a large bathochromic shift (153 nm) and a definite colour change for Cu2+. HMD could detect Cu2+ down to 0.47 μmol/L in the solution phase and could clearly distinguish it from other metal ions, even in the test strip. The binding mode between HMD and Cu2+ was determined to be 1:1 using Job plot and electrospray ionisation mass spectrometry. The sensing mechanism of HMD for Cu2+ was illustrated as the combination of metal-to-ligand charge transfer and intramolecular charge transfer via theoretical calculation. Note de contenu : - EXPERIMENTAL : Materials and equipment - Synthesis of sensor HMD - Ultraviolet-visible selectivity - UV-vis titrations - Job plot - Competitive tests - 1H NMR titration - Colorimetric strips - Calculations for HMD and HMD-Cu2+ - RESULTS AND DISCUSSION : Colorimetric examinations of HMD towards Cu2° - Theoretical calculations of HMD and HMD-Cu2+ DOI : https://doi.org/10.1111/cote.12548 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12548 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36508 [article]

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Study on the effect of different dyeing systems on the interaction of multi-component reactive dyes by Raman spectroscopy / Yamin Dai in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 520-529 Titre : Study on the effect of different dyeing systems on the interaction of multi-component reactive dyes by Raman spectroscopy Type de document : texte imprimé Auteurs : Yamin Dai, Auteur ; Hong Xu, Auteur ; Yi Zhong, Auteur ; Linping Zhang, Auteur ; Xiaofeng Sui, Auteur ; Xueling Feng, Auteur ; Bijia Wang, Auteur ; Zhiping Mao, Auteur Année de publication : 2021 Article en page(s) : p. 520-529 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bleu (couleur) Colorants -- Adsorption 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). Essais (technologie) Jaune Rouge (couleur) Spectroscopie Raman Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The interaction of dye molecules in different adsorption systems is diverse, which affects the adsorption process. In this work, the real-time adsorption process of CI Reactive Red 195 (RR195), CI Reactive Yellow 145 (RY145), and CI Reactive Blue 194 (RB194) in the actual dyeing process have been studied on cotton fabric by Raman spectroscopy. Three single, three binary, and one ternary system have been investigated at different temperatures (40, 50, 60, and 80°C). The equilibrium dye-uptake of RR195 and RY145 on cotton fabric decreased with the addition of other components, while that of RB194 remained unchanged. The temperature has little effect on the dyeing of cotton fabric with the RR195/RY145 system. The RR195/RB194 system is more suitable for high-temperature dyeing. RY145 is less affected by temperature below 60°C while dyeing at 80°C is greatly affected by temperature in the four systems. RB194 with a higher substantivity to the cotton fibre is less affected by temperature in the four systems. The batch adsorption rate data for the seven systems have been analysed based on pseudo-second-order kinetics. The results showed that the increase in temperature can accelerate the dyeing rate and time for dye adsorption to reach equilibrium. Activation parameters revealed the potential barrier that dyes need to overcome when dyeing cotton fabrics in different systems. In the actual combination dyeing process, the analysis of each component process can optimise the dye formulation and improve the dye utilisation. Note de contenu : - MATERIALS AND METHODS : Materials and chemicals - Raman spectroscopy - Adsorption process test - RESULTS AND DISCUSSION : Adsorption process - Effect of different systems - Effect of temperature - Adsorption kinetics - Activation parameters - Table 1 : Initial system conditions for the adsorption process - Table 2 : The Arrhenius plot for RR195, RY145, and RB194 on cotton fabric at different temperatures in four adsorption systems DOI : https://doi.org/10.1111/cote.12549 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12549 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36509 [article]

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Hue-shifting for accurate and precise quantification of biochemical substances using diagnostic test strips / Ryoichi Doi in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 530-543 Titre : Hue-shifting for accurate and precise quantification of biochemical substances using diagnostic test strips Type de document : texte imprimé Auteurs : Ryoichi Doi, Auteur Année de publication : 2021 Article en page(s) : p. 530-543 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie) Biochimie Couleur Diagnostic biologique Statistique Tests biologiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Some test strips have high feasibility for the quick and approximate quantification of the biochemical substances in samples. Recently, test strips became more precise and accurate by involving the quantitative observation of coloration and regression modelling. Their accuracy and precision can be significantly improved by hue-shifting the colours of the original sample and those of the standards. The standard colour images included in the instructions of test strips for the detection of four urinary and two salivary biochemical substances were used. Images of glucose-loaded test strips for urinary glucose detection were also prepared. Using the red-green-blue (RGB) colour image, the author prepared 11 hue-shifted colour images by changing the hue of the original RGB colour image at intervals of 30°. From each of the 12 colour images, 10 greyscale images indicating values of the intensity of RGB, cyan, magenta, yellow, key black, L*, a* and b* were prepared. In regression modelling, the additional 110 greyscale images improved the values of the coefficient of determination and normalised mean absolute error in the quantification of protein, specific gravity, urobilinogen and glucose in urine, as well as of alcohol and nitric oxide in saliva. Further analyses showed that the hue-shifting technique yielded new greyscale images that were more significantly related to the values of the biochemical variables in question than any previous greyscale images. This improvement was realised by the most significant linear measures for the description of concentrations of biochemical substances, and synergetic effects between significant greyscale images. Note de contenu : - Test strip products for urine and saliva - Processing images of standard colours - Statistical analyses - Table 1 : Multiple regression statistics for significant greyscale images for the quantification of urinary and salivary biochemical substances with and without hue-shifting of the colour images of the standard colours in the instructions of test strip products - Table 2 : Linear correlations between concentrations of the urinary and salivary biochemical substances and the greyscale intensity for the pixels (n = 10) in the 10 greyscale images without hue-shifting or the significant greyscale images derived from the hue-shifted colour images DOI : https://doi.org/10.1111/cote.12551 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12551 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36510 [article]

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