| Titre : |
Fluorescence labelling of amphoteric acrylic retanning agent |
| Type de document : |
texte imprimé |
| Auteurs : |
Jin Liqiang, Auteur ; Gaosheng Zou, Auteur ; Wenbin Xun, Auteur ; Yulu Wang, Auteur ; Zhang Feifei, Auteur ; Hongxia Zhu, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 185-190 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents de tannage
Caractérisation
Composés amphotériques
Cuirs et peaux
Fluorescence
Marquage (technologie)
Polyvinylamine
Retannage
Transfert de masse
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
In recent years, there has been a growing focus on amphoteric retanning materials due to their crucial role in enhancing the electropositivity of retanned leather and improving the absorption of anionic dyes and fatliquors. This paper introduces a novel design and successful preparation of amphoteric retanning agents. Initially, a series of poly(N-vinylformamide-co-acrylic acid) copolymers were synthesized through a free radical copolymerization reaction initiated by azodiisobutyamidine hydrochloride. Subsequently, these polymers were hydrolyzed to produce an amphoteric retanning agent (A-PVAm) with a solid content of 15 %(Wt). Their structures were characterized using FT-IR, and their isoelectric points were determined through a zeta potential analyzer. Following this, a fluorescent tracer (FA-PVAm) was synthesized by reacting fluorescein 5-isothiocyanate with A-PVAm. This tracer was utilized to monitor the real-time penetration and mass transfer of A-PVAm during the retanning process as a signaling agent. The mass transfer of A-PVAm was observed concerning dosage and running time. It was observed that within 60 minutes, A-PVAm could evenly distribute throughout the leather. In instances where the retanning agent dosage was inadequate, the inner part of the crust showed minimal presence of the retanning agent. However, at dosages exceeding 20 %, the retanning agent exhibited uniform distribution within the leather. The utilization of the fluorescent tracing technique proved effective in creating a tracer to monitor the penetration of the amphoteric acrylic resin retanning agent in leather. This approach can assist in optimizing the molecule structure of the polyacrylate retanning agent and analyzing its mechanism of action. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Preparation of poly (N-vinylformamide-co-acrylic acid) copolymer (PNVF) - Preparation of amphoteric polyvinylamine retanning agent (A-PVAm) - The mass transfer and distribution of A-PVAm in crust
- RESULTS AND DISCUSSION : Characterization of (PNVF) - Characterization of A-PVAm - Characterization of FA-PVAm - The mass transfer and distribution of A-PVAm in crust
- Table 1 : Recipe of the preparation of PNVF
- Table 2 : The application formulation of A-PVAm |
| En ligne : |
https://drive.google.com/file/d/1l6KtiiRU5KjinwvROAzHg82Dvg4fcu9O/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41405 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 108, N° 4 (07-08/2024) . - p. 185-190
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