| Titre : |
Synthesis and retanning performance of a novel melamine resin with ultralow formaldehyde content |
| Type de document : |
texte imprimé |
| Auteurs : |
Zhou Ji-Bo, Auteur ; Liao Xue-Pin, Auteur ; Bi Shi, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 23-35 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Absorption
Caractérisation
Cuir -- Teneur en formaldéhyde
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Granulométrie
Mélamine -- Synthèse
Mélamine à faible teneur en formaldéhyde
Potentiel zeta
Retannage
Stabilité au stockage
Tannage organique
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Diethanolamine, epichlorohydrin (ECH), and lysine were used to change the traditional synthesis route to address the formaldehyde emission issue of melamine resin (MR), and a novel waterborne MR retanning agent with ultralow formaldehyde content (MUF) was finally obtained. The structure of MUF was characterized by Fourier transform infrared spectroscopy, 13C nuclear magnetic resonance, and X-ray photoelectron spectroscopy, and its retanning performances in wet-blue and wet-white leathers were thoroughly investigated. Results showed that the formaldehyde content of MUF was 28.05 mg/kg, which was greatly lower than that of traditional MR (3550.23/2543.45 mg/kg), and the formaldehyde contents of chrome- and TWLZ-tanned leathers retanned by MUF were only 12.68 and 8.98 mg/kg, respectively. The thickening rates of MUF-retanned leather were up to 13.40% (chrome-tanned leather) and 9.58% (TWLZ-tanned leather), and MUF showed a satisfying overall performance in retanning leather. MUF is highly promising in practical application owing to its ultralow formaldehyde content, excellent stability in aqueous solution, and satisfactory retanning behaviors. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - MUF preparation - TRP synthesis - CCI preparation - MUF synthesis - Characterizatio of intermediate and final products Fourier transform infrared (FTIR) spectroscopy analysis - Nuclear magnetic resonance (NMR) spectroscopy - X-ray photoelectron spectroscopy (XPS) analysis - Storage stability and release of formaldehyde content during storage - Particle size and isoelectric point (pI) analysis - Absorption of retanning and fatliquoring agents - Thickening rates of retanned leather - Physical and mechanical strength of leather - Determination of free formaldehyde content in leather
- RESULTS AND DISCUSSION : Characterization of retanning agents (FTIR analysis - NMR - XPS analysis) - Storage stability and formaldehyde determination of retanning agents - Particle size and zeta potential - Retanning performances of MUF : Absorption rates of retanning and fatliuqoring agents - Physical and mechanical strengths - Determination of free formaldehyde in leather
- Table 1 : Wet-blue retanning processes
- Table 2 : Wet-white retanning processes |
| DOI : |
https://doi.org/10.34314/jalca.v118i1.6413 |
| En ligne : |
https://drive.google.com/file/d/1qaCrrRJcWk_9qkGPtrNZylyJt7DVhboY/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39162 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 1 (01/2023) . - p. 23-35
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Synthesis and retanning performance of a novel melamine resin with ultralow formaldehyde content in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 1 (01/2023)
