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Synthesis and retanning performance of a novel melamine resin with ultralow formaldehyde content / Zhou Ji-Bo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 1 (01/2023)
[article]
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 organiqueIndex. 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 processesDOI : 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 : 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[article]Réservation
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