Analysis of pore-size and related parameters for leather matrix through capillary flow porosimetry technique / Venkatasubramanian Sivakumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 1 (01-02/2015)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 1 (01-02/2015) . - p. 16-22 Titre : Analysis of pore-size and related parameters for leather matrix through capillary flow porosimetry technique Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; Akshaya Jena, Auteur ; Krishna Gupta, Auteur ; Asit Baran Mandal, Auteur Année de publication : 2015 Article en page(s) : p. 16-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Porosimétrie d'écoulement capillaire Porosité Taille des pores Tannage au chrome Tannage végétal Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather processing involves diffusion of various chemicals through the pores of skin/leather matrix. Pore-size of the matrix has significant impact on the diffusion rates of the substances involved. The determination of pore-sizes and related parameters is necessary for an understanding of the diffusion phenomena in leather processing and related techniques. There are some limitations in existing pore-size measurement techniques for natural fibrous materials like leather; hence there is a need for development of novel techniques with non-influencing character on structure of materials like leather. In this regard, a capillary flow porosimetry technique for pore-size measurement has been applied to two types of leather viz., full-chrome crust leather (FCC) and vegetable-tanned crust (VTC). By utilizing the capillary flow porosimetry technique, important pore-size parameters such as smallest, largest and mean pore-size plus porosity and average Darcy permeability have been determined. The respective values are 0.04p, 0.93p, 0.13p, 59.1% and 0.027 respectively for FCC leather and 0.04p, 0.67p, 0.11p, 49.9% and 0.021 for VTC leather. The results indicate that FCC leather has greater porosity compared to VTC leather; possibly due to chrome tanning providing less filling effect compared to vegetable tanning. Note de contenu : - LIMITATIONS OF EXISTING POROSIMETRY TECHNIQUES : Capillary flow porosimetry technique (CPF) : principle - CPF TECHNIQUES - APPLICATION OF CPF FOR DETERMINING PORE-SIZE PARAMETERS IN LEATHER MATRIX : Structure of leather - MATERIALS AND METHODS - RESULTS AND DISCUSSION : Flow rate vs. pressure - Cumulative filter flow vs. pore diameter - Pore size distribution vs. pore diameter - Number pore size distribution vs. average pore diameter - Surface area - Pore-size parameters En ligne : https://drive.google.com/file/d/1fGKd1bf8KpV_CnsPhEfuyphKtiGyq6x2/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23229 [article]

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