Titre : |
Ferrous-gluconic acid compound tanning : a cleaner chrome-free tanning system |
Type de document : |
texte imprimé |
Auteurs : |
Yang Mao, Auteur ; Yi Jie, Auteur ; Shan Zhi-Hua, Auteur ; Chen Hui, Auteur |
Année de publication : |
2013 |
Article en page(s) : |
p. 257-265 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Chimie analytique Cuirs et peaux -- Propriétés mécaniques Gluconique, AcideL'acide gluconique (C6H12O7) est un acide très répandu aussi bien chez les animaux que dans les plantes. Il est le plus souvent intégré dans une molécule plus grande comme c'est le cas dans diverses gommes. Il est obtenu à partir de la gomme d'acacia, à partir de laquelle on l'isole sous la forme de cristaux en aiguilles fondant à 165 °C. Il est soluble dans l'eau et l'alcool. Il est autorisé en Europe comme additif alimentaire (E5748). Ions fer Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium
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Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
Résumé : |
In order to evaluate the reaction mechanism between Fe2+-gluconic acid compound and collagen, the combination tanning of type-I collagen with Fe2+-gluconic acid compound was studied by UV-Vis spectroscopy, infrared spectroscopy, circular dichroism, and differential scanning calorimetry. The molar ratio for the reaction between Fe2+ and gluconic acid was 1:3. The resulting increased thermal stability could be attributed to crosslinks formed between the compound and collagen. The tanning trials indicated favorable results. The shrinkage temperature observed was 96°C, with tensile strength of about 239 kg/cm, elongation at break of about 63% and tear strength of about 74 kg/cm. The leather tanned with the Fe2+-gluconic acid compound was lighter in color compared to the single ferrous sulfate (Fe(II)) tanning system, and had neither a darkening of color nor a reduction in strength properties. It was also clear that COD and TS loads were decreased by 26.5% and 29.8%, respectively compared to Fe(II) system, 7.3% and 26.1%, respectively, compared to BCS system. Studies show that the disadvantages connected with Fe(II) tanning system including loss of strength and darkening of color have been solved successfully. |
Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of the Fe2+-glucnic acid compound - UV-Vis spectral studies - FT-IR spectra - Elemental analysis - Viscosity measurements - CD spectroscopy - DSC determination - Tanning trials - Analysis of strength characteristics - Spent tan liquor analysis
- RESULTS AND DISCUSSION : UV-vis spectral studies - FT-IR studies - Elemental analysis - Viscosity analysis of the collagen-Fe2+-gluconic acid system - CD studies - DSC studies - Physical properties analysis of leathers - Spent tanning liquor analysis |
En ligne : |
https://drive.google.com/file/d/1TTrHv9Q4Ceid9uZIuiBo1ApYG2CsL0EW/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19010 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 7 (07/2013) . - p. 257-265