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Characteristics of aldehyde reactive dyes for leather dyeing and retanning process / Xiao Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 10 (10/2015)
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Titre : Characteristics of aldehyde reactive dyes for leather dyeing and retanning process Type de document : texte imprimé Auteurs : Xiao Chen, Auteur ; Jun Liu, Auteur ; Jie Ding, Auteur ; Keyi Ding, Auteur Année de publication : 2015 Article en page(s) : p. 338-345 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aldéhydes Un aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle.
L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse.
Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde.
AluminiumL'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Colorants réactifs
Cuirs et peaux -- Lavage
Cuirs et peaux -- Teinture
Glutaraldéhyde
Retannage
Wet-white (tannage)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Dyeing and re-tanning properties of nine aldehyde reactive dyes synthesized in our previous work were studied using aluminum pretanned wet-white sheep leather as a substrate. Their washing fastness and four dyeing property indexes, i.e., substantivity (S), exhaustion (E), reactivity (R) and fixation (F) were measured. The relationship between the colormatching effect and the relative difference values of the four dyeing property indexes of the combined dyes were investigated, and the simultaneous tanning-dyeing property of reactive dyes with a glutaraldehyde backbone were tested. The results were as follows: (1) The synthesized aldehyde reactive dyes could dye wet-white leather under mild conditions (T = 35-45°C, pH =4.0-6.5) within 1.5 h, and the dyed leather possessed a satisfactory washing-fastness. (2) Reactive dyes with a glutaraldehyde backbone had better dyeing performance than mono-aldehyde reactive dyes. (3) The less the relative difference value of the dyeing property indexes of the combined dyes, the better was the color matching effect. (4) The tested reactive dyes with a glutaraldehyde backbone increased the Ts of wet-white leather to 11-17°C in addition to dyeing it to the corresponding color. Note de contenu : - EXPERIMENTAL : Brief introduction for the preparation of aldehyde reactive dyes - The measurement of S, E, F and R (taking D, as an example) - Measuring of washing fastness - Combined dyeing experiment with two aldehyde - Simultaneous tanning-dyeing
- RESULTS AND DISCUSSION : The advantage for the dyeing process of the dyes - The washing fastness and S, E, R, F, values - Results of combined dyeing experiments - Tanning property of reactive dyes with glutaraldehyde backboneEn ligne : https://drive.google.com/file/d/1qxD9DP65TuHUvZFGI41eBda5LIXF5ffu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24745
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Code-barres Cote Support Localisation Section Disponibilité 17500 - Périodique Bibliothèque principale Documentaires Disponible Color forming property of derivatives and modification products of natural iridoids with methylamine / Xue Shao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 1 (01/2015)
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Titre : Color forming property of derivatives and modification products of natural iridoids with methylamine Type de document : texte imprimé Auteurs : Xue Shao, Auteur ; Keyi Ding, Auteur ; Jun Liu, Auteur Année de publication : 2015 Article en page(s) : p. 1-6 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couleur
Iridoïdes
Méthylamine
Pigments -- Analyse
Pigments -- SynthèseIndex. décimale : 667.2 Colorants et pigments Résumé : Derivatives and modified products of five natural iridoids (geniposide, gentiopicroside, swertiamarin, loganin and morroniside) were obtained by derivatization or modification. Compounds before and after derivatization or modification were adopted to react with methylamine to investigate their color-forming property. The relationship between the color of the pigments and the structure was analyzed using ultraviolet-visible (UV-vis) spectroscopy. The results indicated that: (1) when the backbone of the iridoids was the same, the position of the modified substituent groups had the greatest effect on the color of the pigments formed. For example, methygentiopicroside aglycone and methylswertimarin aglycone have a similar skeleton structure, differing only at positions C-5 and C-6, and the pigments obtained from their reaction with methylamine were also similar i.e. bright yellow. However, geniposidic acid aglycone and genipin, which also have a similar skeleton structure, differing only in the substituent at position C-4, produce pigments of different color upon reaction with methylamine, one being dark blue and the other purple red. (2) In different buffer systems, i.e., phosphate buffered saline (PBS, pH=8.0) and acetate buffer (ACE, pH=5.0), the same iridoid formed pigments with different colors. (3) After the ?-? conjugation of benzoyl was introduced to the skeleton of loganin, genipin and morronin as a substituent group, the characteristic absorption wavelength of pigments changed. Taking loganin as an example, the characteristic absorption wavelength of pigments changed from 430 nm and 650, to 465 nm and 670 nm when reacted in PBS, and from 560 nm to 610 nm when reacted in ACE. The reason might be that the conjugation system became longer and the molecular structure became more stable. Note de contenu : - EXPERIMENTAL : Materials - Preparation of derivative of geniposide and its reaction with methylamine principal
- METHODS : Preparation of geniposidic acid - Hydrolysis of geniposidic acid - The reaction of geniposidic acid aglycon with methylamine - Preparation of derivatives of gentiopicroside and swertiamarin and their reaction with methylamine principal - Method - Structural modification for natural iridoids the process for preparing benzoyl chloride - The reaction of natural iridoids with benzoyl chloride (taking geniposide as an example - Hydrolysis of iridoid glucosides - Color forming reaction of six iridoid aglycones with methylamine
- RESULTS AND DISCUSSION : The color forming reaction of geniposidic acid aglycon with methylamine - The color-forming reaction of methygentiopicroside aglycone and methylswertimarin aglycone with methylamine - Comparing experiment for the color forming of three aglycones and their modification products color-forming result of loganin aglycon and its modification product (compound II) - Color-forming results of genipin, morroniside aglycone and their modification products (compounds I and III)En ligne : https://drive.google.com/file/d/1gUrJfpY8rqZKElx_riZHmxBdop7aRonT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22790
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Code-barres Cote Support Localisation Section Disponibilité 16774 - Périodique Bibliothèque principale Documentaires Disponible Composition and structural analysis of organic acid masked aluminum tanning solutions using 27Al NMR / Keyi Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 11 (11/2006)
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Titre : Composition and structural analysis of organic acid masked aluminum tanning solutions using 27Al NMR Type de document : texte imprimé Auteurs : Keyi Ding, Auteur ; J. Liu, Auteur ; T. Zhang, Auteur Année de publication : 2006 Article en page(s) : p. 381-387 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this study, 27Al NMR was applied to gain information about the composition distributions and the structures of organic acid masked aluminum complexes in tanning solutions. The result indicated that in the pH range of aluminum tanning condition, three classes of organic acid masked aluminum complexes were found, i.e.: mononuclear complexes, linear polymeric complexes containing 2 - 4 Al3+ and "Al13 like" complexes. The predominated species was the "Al13 like" complexes, with more than 70% of the Al3+ in this state when the solution pH was ≥ 3.5. "Al13 like" complexes have a stiff spherically symmetrical structure (e-Keggin structure), consisting of one central [AlO4]5- tetrahedron, and surrounded with 9 - 30 octahedral aluminum complexes sharing edges. The diameter of a "Al13 like" complex is about 8 - 16 A. The understanding about the special structure of "Al13 like" complexes gives a rational explanation as to why in organic acid masked aluminum complex solutions, most of the added organic acid anions were in "free" state. The results of this study provide a basis for better understanding the mechanism of aluminum tannage or aluminum combination tannage with other tanning agents.. En ligne : https://drive.google.com/file/d/1a6f4XJs-9jvLyOe4sl_Si3DvJVUdShxF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3968
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Code-barres Cote Support Localisation Section Disponibilité 005798 - Périodique Bibliothèque principale Documentaires Disponible Dyeing/cross-linking property of natural iridoids to protein fibers / Baoqin Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 4 (04/2011)
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Titre : Dyeing/cross-linking property of natural iridoids to protein fibers : Part I. Preparation of four natural iridoids and their dyeing/cross-linking (tanning) property to hide power Type de document : texte imprimé Auteurs : Baoqin Zhang, Auteur ; Loujin Xu, Auteur ; Keyi Ding, Auteur Année de publication : 2011 Article en page(s) : p. 121-126 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Teinture
Iridoïdes
Résonance magnétique nucléaire
Spectrométrie de masse
TannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Four iridoid compounds, genipin, loganin aglycone, oleuropein aglycone and E-6-O-methoxycinnamoyl scandoside methyl ester aglycone were prepared from Gardenia jasminoides Ellis, Lonicera japonica Thunb, Olea europaea Linn and Hedyotis diffusa (Willd) Roxb respectively, their structures were identified by electron spray ionization-mass spectrometry (ESI-MS), 1H NMR and 13C NMR. Their dyeing/tanning properties on hide powder was investigated, the relationship between dyeing/cross-linking (tanning) property and the chemical structures were discussed. The results showed that these four natural iridoids could react with hide powder under mild conditions (35?, pH=7.5-8.0), within a short time (about 6 h) and at a low dosage (5% (w/w) of hide powder). The hydrothermal stability of the reacted hide powder was 20-25°C higher than the control sample, and different colors, such as dark blue, brown-yellow, yellow and mauve, were imparted to hide powder. The mechanism might be that cross-linking reaction took place between iridoids and –NH2 groups of collagen molecular chains. These results implied that natural iridoids might act as completely novel “natural reactive dyes”, especially for protein fibers and offering environmental-friendly simultaneous tanning-dyeing agents for leather manufacture. Note de contenu : - EXPERIMENTAL : Materials - Preparation and identification of iridoid glucosides (preparation and identification of loganin - Preparation and identification of geniposide, oleuropein and E-6-O-methoxycinnamoyl scandoside methyl ester - Preparation of iridoid aglycones by hydrolysis - Tanning and dyeing experiment).
- Analytical procedures : Determination of thermal stability - Stability of iridoid aglycones in phosphate buffered saline (PBS) - reaction analysis between genipin and BSA via SDS-PAGE
RESULT AND DISCUSSION : The chemical structures of four iridoid glycosides - Tanning and dyeing properties of iridoids on hide powder - the dyeing/tanning mechanism of iridoids to hide powder iridoid stability in PBS : Analysis by SDS-PAGE for the reaction between genipin and BSA.En ligne : https://drive.google.com/file/d/12fkr42u_e6_nxZOrWmSXHcUGFOuYPjiz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11314
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Code-barres Cote Support Localisation Section Disponibilité 013045 - Périodique Bibliothèque principale Documentaires Disponible Effect of genipin on the thermal stability of hide powder / Keyi Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 10 (10/2006)
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Titre : Effect of genipin on the thermal stability of hide powder Type de document : texte imprimé Auteurs : Keyi Ding, Auteur ; Maryann M. Taylor, Auteur ; Eleanor M. Brown, Auteur Année de publication : 2006 Article en page(s) : p. 362-367 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Genipin, a derivative of the iridoid glycoside geniposide in the fruit of Gardenia jasmindides Ellis, is a naturally occurring protein crosslinking agent, which is not cytotoxic, and is beginning to replace glutaraldehyde as a fixative for biological tissues. This study was undertaken to evaluate the potential of iridoid compounds, in particular genipin, for use as tanning agents. The tanning effect of genipin on bovine hide powder was investigated. Parameters including the dosage of genipin, reaction time, pH and temperature of the tanning process were varied. The peak temperature (Tp) obtained by differential scanning calorimetry (DSC) of treated hide powder was used to evaluate the tanning effect. The results indicated that hide powder which had been treated with 5% genipin at pH - 7 and 35 °C for 24 h had a Tp of 79 °C. A secondary observation was that the tanned hide powder exhibited a dark blue color characteristic of the reaction of primary amines with genipin. A likely mechanism for genipin tanning is discussed. These results provide a new potential approach to chromium-free tanning for the leather industry. En ligne : https://drive.google.com/file/d/1ELoFMHiGOAGb6EzYkud06iB9SmqW8Fpy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3974
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Code-barres Cote Support Localisation Section Disponibilité 005680 - Périodique Bibliothèque principale Documentaires Disponible Environmental effects on chrome-free leather / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 10 (10/2006)
PermalinkFive tanning-dyeing processes based on triphenodioxazine (TPDO) / Tianyu Liang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 3 (03/2018)
PermalinkGenipin -aluminium or -vegetable tannin combinations on hide powder / Keyi Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 5 (05/2007)
PermalinkNovel titanium (IV) tanning for leathers with superior hydrothermal stability / Biyu Peng in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 9 (09/2007)
PermalinkNovel titanium (IV) tanning for leathers with superior hydrothermal stability / Biyu Peng in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 10 (10/2007)
PermalinkSolid state NMR analysis for hide powder tanned by aluminum, silicon and phosphorus tanning agents before and after hydrothermal denaturation / Jun Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 10 (10/2021)
PermalinkTanning effects of aluminum -genipin or -vegetable tannin combinations / Keyi Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 11 (11/2008)
PermalinkThe composition analysis of organic acid masked aluminium tannig solutions by ferron assay and GFC / Keyi Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 7 (07/2006)
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