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)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 4 (04/2011) . - p. 121-126 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 Tannage Index. 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11314 [article]

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