Preparation and application of vinyl polymer-mmt nano tanning agent / Ma Jianzhong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 5 (09-10/2005)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 5 (09-10/2005) . - p. 181-185 Titre : Preparation and application of vinyl polymer-mmt nano tanning agent Type de document : texte imprimé Auteurs : Ma Jianzhong, Auteur ; Yun Chu, Auteur ; Gao Dangge, Auteur ; Lv Bin Dai Jianfang, Auteur Année de publication : 2005 Article en page(s) : p. 181-185 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Caractérisation Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Mesure Montmorillonite Nanoparticules Perméabilité Polymères -- Synthèse polymères vinyliques Tannage au chrome Température de retrait Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this paper, montmorillonite (MMT) was first modified with dimethyldiallyl ammonium chloride (referred to as DMDAAC) and cetyl trimethylammonium bromide (CTAB) through a cation exchanging reaction. The modified MMT and the vinyl polymer were then used to prepare composites which were then characterized by XRD. Finally, the vinyl polymer/CTAB modified MMT (abbreviated to VP/C-MMT) was applied in the leather making process to examine its tanning properties. The results of XRD show that the interlayer spacing of the modified MMT is received are 1.40nm and 1.99nm for DMDAAC-MMT and CTAB-MMT respectively, while the d-spacing distance of pristine MMT is only 1.23nm. The composites of DMDAAC modified MMT and VP are phase separated, while CTAB modified MMT formed intercalated nanocomposites with VP. The application results show, that the shrinkage temperature of leather tanned by VP/C-MMT nano-tannage associated with 2% chrome under optimum process conditions can be raised to 90°C, the strength properties and the water permeability of tanned leather are closely similar to those of a 8% chrome tanned leather, meanwhile, the incrassation rates [thickness increment ratios] are far geater than for the 8% chrome tanned leather. We conclude that the nano tannage is an appropriate application in a reduced-chrome tannage. Note de contenu : - EXPERIMENTAL PROCEDURE : Major chemicals - Synthesis of vinyl polymer - Preparation of modified MMT - Preparation of composites - Application of VP/C-MMT nano tannage - Characterization and measurement - RESULTS AND DISCUSSIONS : Characterization - Application results - - Table 1 : Chrome decreased tanning procedure - Table 2 : Standard chrome tanning procedure - Table 3 : Shrinkage temperature and thickness increment ratio of the tanned leather - Table 4 : Physical-mechanical properties of leather sample - Table 5 : Water permeability of leather sample En ligne : https://drive.google.com/file/d/14nXC1S3vof-31cyfIIaJY75R8hkNTgOw/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39227 [article]

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