| Titre : |
Fluorescent tracing of dialdehyde sodium alginate tanning agent in leather matrix |
| Type de document : |
texte imprimé |
| Auteurs : |
Min Zhu, Auteur ; Yudan Yi, Auteur ; Jia Fu, Auteur ; Yunhang Zeng, Auteur ; Ya-Nan Wang, Auteur |
| Année de publication : |
2023 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Agents de tannage
Alginate de sodium dialdéhyde
Cuirs et peaux -- Analyse
Traçage fluorescent
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Dialdehyde polysaccharides possess a sustainable nature and good tanning performance. However, the lack of specific detectable groups in their molecular structure results in the difficulty in the determination of the location of dialdehyde polysaccharides in leather fiber networks. In this study, dialdehyde sodium alginate (DSA) tanning agent was fluorescent labeled by 5-(4,6-dichlorotriazinyl) aminofluorescein (DTAF). The purified DTAF–DSA showed high and stable fluorescent intensity at emission wavelength of 515.2 nm when the pH was over 6.0, and the temperature was in the range of 20°C to 50°C. DTAF–DSA was used in tanning and tracked using fluorescence microscopy. Its penetration in the fiber network could be clearly visualized, and its distribution in leather differed with the molecular weight of DSA. As a result, this fluorescence tracing technique could display the mass transfer behavior of dialdehyde polysaccharide tanning agents in leather matrix, which will provide underlying data for tanning mechanism exploration. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of DSA - Fourier Transform Infrared (FT-IR) spectroscopy analysis - Determination of aldehyde group content of DSA - Preparation of DTAF labeled DSA (DTAF-DSA) - Analysis of fluorescence emission spectra - Thermal and pH stability of DTAF-DSA - Determination of molecular weight - Observatio of DTAF-DSA during tanning
- RESULTS AND DISCUSSION : Characteristics of DSA - Characteristics of DTAF-DSA - Fluorescent tracing of DTAF-DSA in leather
- Table 1 : Molecular weight of DSA and DTAF-DSA |
| DOI : |
https://doi.org/10.34314/jalca.v118i9.8189 |
| En ligne : |
https://drive.google.com/file/d/102ZOVOqbg3NIxrQXuw1XmjwRI5mq8gYX/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39826 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 9 (09/2023)
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