Adsorption and fixation behaviour of CI Reactive Red 195 on cotton woven fabric in a nonionic surfactant Triton X-100 reverse micelle / Shixiong Yi in COLORATION TECHNOLOGY, Vol. 128, N° 4 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 4 (2012) . - p. 306-314 Titre : Adsorption and fixation behaviour of CI Reactive Red 195 on cotton woven fabric in a nonionic surfactant Triton X-100 reverse micelle Type de document : texte imprimé Auteurs : Shixiong Yi, Auteur ; Yongchun Dong, Auteur ; Bing Li, Auteur ; Ding Zhizhong, Auteur ; Xiangbo Huang, Auteur ; Lexing Xue, Auteur Année de publication : 2012 Article en page(s) : p. 306-314 Note générale : Errata (voir URL) - Bibliogr. Langues : Anglais (eng) Catégories : 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). Diffusion (physique) Eau -- Consommation -- Réduction Fixation (chimie) Micelles Surfactants Teinture -- Fibres textiles Tissés Index. décimale : 667.3 Teinture et impression des tissus Résumé : To achieve the goals of saving water and being salt-free in the coloration of cotton fabric with reactive dye, nonionic reverse micelles were prepared and optimised with a surfactant, Triton X-100, n-octanol and isooctane by injecting a small amount of CI Reactive Red 195 aqueous solution. The adsorption, diffusion and fixation of this dye on cotton fabric in Triton X-100 reverse micelle and bulk water were then investigated. The equilibrium and kinetic data of the dye adsorption process were evaluated. The colour strength and fixation rate of cotton fabrics dyed in the micelle and in bulk water were also examined and compared. The results indicated that the amount of dye adsorbed increased with the increasing temperature and the initial dye concentration. The dye adsorption process could be described using the Langmuir isotherm and pseudo-second-order kinetic equations. It was found that CI Reactive Red 195 showed a stronger adsorption property on cotton fabric in Triton X-100 reverse micelle than in bulk water without the addition of sodium chloride. Using Triton X-100 reverse micelle as the dyeing medium offered the reactive dye better diffusion performance within the cotton fibre as compared with bulk water. Moreover, higher fixation of the dyes absorbed on the cotton fibre was achieved when the optimum concentration of sodium carbonate was used as the alkali agent in Triton X-100 reverse micelle. Note de contenu : - EXPERIMENTAL : Materials and reagents - Preparation ot TX-100 reverse micelle - Adsorption and fixation of reactive dye on cotton fabric - RESULTS AND DISCUSSION : Optimisation of TX-100 reverse micelle - Adsorption of reactive dye on cotton fabric - Dye adsorption isotherm studies - Dye absorption kinetics - Dye diffusion within cotton fibre - Dye fixation on cotton fibre DOI : 10.1111/j.1478-4408.2012.00381.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00381.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15680 [article]

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Amino acid analysis by low pressure ion chromatography with conductivity detection / Hong Dai in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 5 (09-10/2004)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 5 (09-10/2004) . - p. 197-201 Titre : Amino acid analysis by low pressure ion chromatography with conductivity detection Type de document : texte imprimé Auteurs : Hong Dai, Auteur ; Zhang Xinshen, Auteur ; Zhaoli Wang, Auteur ; Bing Li, Auteur Année de publication : 2004 Article en page(s) : p. 197-201 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides aminés Les acides aminés (ou aminoacides) sont une classe de composés chimiques possédant deux groupes fonctionnels : à la fois un groupe carboxyle –COOH et un groupe amine –NH2. Parmi ceux-ci, les acides α-aminés se définissent par le fait que leur groupe amine est lié à l'atome de carbone adjacent au groupe acide carboxylique (le carbone α), ce qui leur confère la structure générique H2N–CHR–COOH, où R représente la chaîne latérale, qui identifie l'acide α-aminé. Les acides α-aminés jouent un rôle fondamental en biochimie comme constituants élémentaires des protéines : ils polymérisent en formant des liaisons peptidiques qui aboutissent à de longues chaînes macromoléculaires appelées peptides. Chimie analytique Chromatographie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Automated amino acid analysis by low pressure ion chromatography separation and conductivity detection has been investigated. The method is characterized by separating amino acids under the low pressure of 1.97 - 2.94 x 10-5 Pa (30 - 40 psi) and detecting them by sensitive conductivity without pre-column or post-column derivatisation. The chromatography parameters were investigated, i.e. the capacity of the resin, the size of the resin, the length of separation column, elution solution and flow rate. The results show that 10 amino acids, Asp, Hyp, Ser, Glu, Pro, Gly, Ala, Val, Met and Leu have been separated and detected successfully using a 5mm x 100mm long column filled with 25μm - 30μm size and 0.02mmol/g capacity cationic exchange resin. The elution solution is 0.8mmol/L nitric acid solution and the flow rate 0.6ml/min. The method is linear in the concentration range of 10-3 - 10-4 mol/L and 10-4 - 10-5 mol/L. The variation coefficient is 1%-5% and the detection limit which can be achieved is 1.0 x 10-5 mol/L. Note de contenu : - EXPERIMENTAL PROCEDURE : Apparatus - Reagents - Preparation of amino acid solution - Mobile phase - RESULTS : Choice of separation column - Choice of the elution system - Study on the retention time of various kinds of amino acids - Separation experiment - Determination of accuracy - Linear range measurement and linear regression calculation - Determination of detection limits - Table 1 : Optimum chromatography parameters of amino acid analysis - Table 2 : Retention times of amino acids - Table 3 : Result of the accuracy experiment of amino acids analysis by LPIEC and conductivity detection - Table 4 : Result of linearity experiment of 10-3 - 10-4mol/L amino acids - Table 5 : Result of linearity experiment of 10-4 - 10-5 mol/L amino acids - Table 6 : Detection limits En ligne : https://drive.google.com/file/d/1YlHj4KHHmjgADuh5nAo71UU0NUWzG8ul/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39624 [article]

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Colour constancy based on texture similarity for natural images / Bing Li in COLORATION TECHNOLOGY, Vol. 125, N° 6 (2009)  

[article]  inCOLORATION TECHNOLOGY > Vol. 125, N° 6 (2009) . - p. 328-333 Titre : Colour constancy based on texture similarity for natural images Type de document : texte imprimé Auteurs : Bing Li, Auteur ; Congyan Lang, Auteur ; De Xu, Auteur Année de publication : 2010 Article en page(s) : p. 328-333 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Colour constancy is a classical problem in computer vision. Although there are a number of colour constancy algorithms based on different assumptions, none of them can be considered as universal. How to select or combine these available methods for different natural image characteristics is an important problem. Recent studies have shown that the texture feature is an important factor to consider when selecting the best colour constancy algorithm for a certain image. In this paper, Weibull parameterisation is used to identify the texture characteristics of colour images. According to the texture similarity, the best colour constancy method (or best combination of methods) is selected out for a specific image. The experiments were carried out on a large data set and the results show that this new approach outperforms current state-of-the-art single algorithms, as well as some combined algorithms. DOI : 10.1111/j.1478-4408.2009.00214.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2009.00214.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7622 [article]

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Comparison of four oxidants activated through tetraacetylethylenediamine for developing sustainable and rapid degradation of organic dye / Yongchun Dong in COLORATION TECHNOLOGY, Vol. 136, N° 4 (08/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 4 (08/2020) . - p. 389-403 Titre : Comparison of four oxidants activated through tetraacetylethylenediamine for developing sustainable and rapid degradation of organic dye Type de document : texte imprimé Auteurs : Yongchun Dong, Auteur ; Liran Bien, Auteur ; Congcan Zhang, Auteur ; Bing Li, Auteur Année de publication : 2020 Article en page(s) : p. 389-403 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Détérioration Colorants azoïques Oxydants Phytotoxicité Tests de toxicité Tétra-acétyl-éthylène-diamine Index. décimale : 667.3 Teinture et impression des tissus Résumé : Four common oxidants, including hydrogen peroxide (H2O2), sodium percarbonate (SPC), sodium perborate (SPB) and sodium persulphate (SPS), were activated with tetraacetylethylenediamine (TAED) to degrade an azo dye, CI Reactive Red 195, in water, for building a novel and rapid oxidative system comprising the merits of cost‐effectiveness and high sustainability. Elevated temperature and high pH level enhanced the activation effect of TAED for accelerating dye degradation. Peracetic acids were confirmed to be the main oxidative species for dye degradation in four TAED/oxidant systems. Hydroxyl radicals and sulphate radicals were also involved in dye degradation in the TAED/SPS system, which showed a stronger oxidative capacity than the other three systems over a wide pH range. More importantly, the addition of inorganic salts or surfactants also favoured the dye degradation in TAED/oxidant systems. Although a slow mineralisation process of the dye was found when the TAED/SPC or SPS system was used, low‐toxic intermediates were detected after the degradation. Note de contenu : - EXPERIMENTAL : Reagents and materials - Experimental procedures - Analytical methods - Phytotoxicity tests - RESULTS AND DISCUSSION : Optimisation of CI reactive red 195 degradation in TAED/oxidant systems - Contribution of active species to dye degradation - Possible degradation pathway of CI reactive red 195 in TAED/oxidant systems - Effect of inorganic salts and surfactants - Phytotoxicity assessment of dye decomposition products DOI : https://doi.org/10.1111/cote.12474 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12474 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34355 [article]

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Photoassisted degradation of CI reactive red 195 using and Fe(III)-grafted polytetrafluoroethylene fibre complex as a novel heterogeneous Fenton catalyst over a wide pH range / Bing Li in COLORATION TECHNOLOGY, Vol. 129, N° 6 (12/2013)  

[article]  inCOLORATION TECHNOLOGY > Vol. 129, N° 6 (12/2013) . - p. 403-411 Titre : Photoassisted degradation of CI reactive red 195 using and Fe(III)-grafted polytetrafluoroethylene fibre complex as a novel heterogeneous Fenton catalyst over a wide pH range Type de document : texte imprimé Auteurs : Bing Li, Auteur ; Yongchun Dong, Auteur ; Ding Zhizhong, Auteur Année de publication : 2013 Article en page(s) : p. 403-411 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : acrylique, Acide L'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre. L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages. Catalyse hétérogène Colorants azoïques Colorants réactifs -- Détérioration Colorants réactifs -- Effets du rayonnement ultraviolet Copolymères greffés Fenton, Réaction de Fer trivalent Greffage (chimie) Ions cuivre Oxydation pH Polytétrafluoréthylène Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Polytetrafluoroethylene fibre was grafted with acrylic acid to form an effective ligand, which coordinated with Fe(III) ions to prepare an Fe(III)-grafted polytetrafluoroethylene fibre complex. The photoassisted degradation of a typical azo dye, CI Reactive Red 195, using the Fe(III)-grafted polytetrafluoroethylene fibre complex as a novel heterogeneous Fenton catalyst in a wide pH range of 3–9 was investigated. In order to achieve better degradation in a higher pH range, the effect of Fe content, incorporation of Cu(II) ions and UV light irradiation on dye degradation was also examined. The results indicated that dye degradation was effective in the presence of the Fe(III)-grafted polytetrafluoroethylene fibre complex. Fast degradation of the dye can take place in an acidic environment. Increasing the Fe content or incorporating Cu(II) ions can significantly accelerate dye degradation, and UV light irradiation is much more effective than visible light irradiation in a higher pH range, especially in the alkaline pH range. Note de contenu : - EXPERIMENTAL : Materials and reagents - Graft polymerization of polytetrafluoroethylene fibres - Preparation of metal-grafted fibre complexes - Charaterisation of metal-grafted fibre complexes - Photocatalytic reaction set-up - Degradation procedure and analysis - RESULTS AND DISCUSSION : Characterisation of metal-grafted fibre complexes - Metal ions leaching from the catalyst - Heterogeneous decomposition of dye at different solution pH - Fe content of the catalyst - Cu(II) ion as the assistant metal ion - UV light irradiation DOI : 10.1111/cote.12049 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12049/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19739 [article]

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