Biomass-based tanning agent for sustainable leather manufacture via cyanuric chloride modified chitooligosaccharide / Min Jiang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 10 (10/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 10 (10/2023) . - p. 417-427 Titre : Biomass-based tanning agent for sustainable leather manufacture via cyanuric chloride modified chitooligosaccharide Type de document : texte imprimé Auteurs : Min Jiang, Auteur ; Yuanhang Xiao, Auteur ; Jun Sang, Auteur ; Chunhua Wang, Auteur ; Jiajing Zhou, Auteur ; Wei Lin, Auteur Année de publication : 2023 Article en page(s) : p. 417-427 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage Analyse morphologique Biomasse Caractérisation Chitooligosaccharide Composés organiques -- Synthèse Cuirs et peaux -- Propriétés organoleptiques Cuirs et peaux -- Propriétés physiques Poids Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Developing alternative tanning agents to avoid the potential environmental and human health risks from the conventional chrome tanning is essential for the leather industry. In this work, we prepared an eco-friendly biomass-based tanning agent dichlorotriazinyl chitooligosaccharide (DTCS) by modifying chitooligosaccharide (COS) with cyanuric chloride (CC) for chrome-free leather manufacture. The synthesis of such biomass-based tanning agent was systematically optimized to obtain the target product with high grafting degree of 67% and weight-average molecular weight (Mw) of 1465 g/mol. The non-pickling tanning procedure using DTCS was investigated, and the interactions between DTCS and collagen fibers were studied. Our results showed that the hydrothermal stability of the tanned leather was significantly increased, i.e., the shrinkage temperature (Ts) exceeding 82.0°C, and the mechanical properties were improved. Moreover, the organoleptic properties of leather (e.g., fullness, softness and grain tightness) exhibited obvious improvement. This research not only offers a reliable approach for cleaner leather manufacturing while addressing the underlying ecological pressure, but also highlights the emerging use of biomass materials in the leather industry. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of DTCS - Determination of grafting degree (GD) of DTCS - Characterization of DTCS - DTCS tanning trials - Leather properties analysis - RESULTS AND DISCUSSION : Optimization of DTCS synthesis condition - Characterization of DTCS - Optimizatin of DTCS tanning process - Leather morphology anlaysis - Thickening rate analysis - Physical and organoleptic properties analysis - Table 1 : Tanning process for DTCS - Table 2 : Tanning process for F-90 - Table 3 : The average molecular weight and molecular-weight distribution of COS and DTCS - Table IV : The optimum tanning process of DTCS DOI : https://doi.org/10.34314/jalca.v118i10.8230 En ligne : https://drive.google.com/file/d/1csGAWb8R-ZPLSmdInoTLfYTzOcUHK0KN/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39940 [article]

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