Accueil
Détail de l'auteur
Auteur Adriano Peruzzi |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
Investigating the cell rotary conditioning mechanism using dynamic mechanical thermal analysis / Karl Flowers in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 10 (10/2015)
[article]
Titre : Investigating the cell rotary conditioning mechanism using dynamic mechanical thermal analysis Type de document : texte imprimé Auteurs : Karl Flowers, Auteur ; Adriano Peruzzi, Auteur ; William R. Wise, Auteur ; Anthony D. Covington, Auteur Année de publication : 2015 Article en page(s) : p. 317-325 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Adsorption
Analyse thermomécanique dynamique
Calorimétrie
Cuirs et peaux -- Séchage
Désorption
Gravimétrie (chimie analytique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Jeyapalina et al. established that dynamic mechanical thermal analysis (DMTA) can be used to gauge the progression of leather drying. This work has now been advanced in order to understand the mechanism surrounding sorption/desorption of moisture during cell conditioning, e.g., cell rotary conditioning (CRC). This paper will demonstrate how the use of DMTA could be used to monitor changes in leather stiffness. A gravimetric moisture analysis was performed on identical leather samples to gauge the progression of desorption. The change in storage modulus (E’) was coupled to the moisture content (leather moisture and atmospheric relative humidity) to obtain a better understanding of the physical properties (specifically stiffness) of leather during a drying process. The research presented illustrates how DMTA can indicate leather fiber response to changes in atmospheric humidity and facilitate real-time adaptation of drying conditions during leather dehydration. The use of a cell conditioning system allows a tanner to control the flexibility of the material through the tension applied and the drying conditions. DMTA shows that the favorable conditions inside a CRC unit result in detectable changes to the leather fiber, similar to findings by Abrahamson and Williams-Wynn. Using this technique a researcher can dry chromium-containing and chromium-free leathers in a manner that is highly customizable to produce desired physical properties. Difficulties experienced in chromium-free leathers can also be investigated in detail using this technique. Note de contenu : - INTRODUCTION : Drying literature - Drying methods - Sorption/desorption of water - Effects of heat and moisture on leather - Dynamic mechanical thermal analysis
- EXPERIMENTAL : Leather raw materials - Conditioning - Dynamic mechanical thermal analysis - Differential scanning calorimetry
- RESULTS AND DISCUSSION : Leather raw materials (gravimetric analysis) - Static thermal studies - Dynamic thermal studiesEn ligne : https://drive.google.com/file/d/1gSTYiwGRroeFzPGRHmK24blXV07LBXW7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24742
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 10 (10/2015) . - p. 317-325[article]Réservation
Réserver ce documentThe impact of milling on leather properties and fatliquor distribution / Richard L. Edmonds in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 6 (11-12/2017)
[article]
Titre : The impact of milling on leather properties and fatliquor distribution Type de document : texte imprimé Auteurs : Richard L. Edmonds, Auteur ; Adriano Peruzzi, Auteur ; Sue M. Cooper, Auteur Année de publication : 2017 Article en page(s) : p. 312-317 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.
Cuirs et peaux -- Analyse
Cuirs et peaux -- Teneur en matières grasses
Douceur (toucher)
Echantillonnage
Epaisseur -- Mesure
Fragmentation
Lipides
Produits de nourriture du cuir
Résistance à la déchirureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather samples were produced With five different types of fatliquor and were treated with a standard milling process. The leathers were assessed before and after milling for strength and softness using standard rnethods and fatliquor distribution was analysed. Milling was pound to increase softness and thickness, and increased the strength of the leather for four of the five different fatliquored samples. The fatliquor distribution was determined using a novel technique where image analysis of a series of photomicrographs of cross sections stained with Sudan III/IV was carried out. It was found that
different fatliquors were distributed slightly differently in the leathers. There were peaks of fat in the grain and lower corium with much less in the upper corium. When the fatliquored crust leather was milled the overall distribution of fat through the cross section remained unchanged indicating that changes in physical properties brought about by milling were not the result of bulk fatliquor redistribution.Note de contenu : - MATERIALS AND METHODS : Leather preparation - Physical testing - Staining procedure - Microscope image analysis
- RESULTS AND DISCUSSION : Absolute fat content - Tear strength, thickness and softness - Redistribution of fat with mechanical actionEn ligne : https://drive.google.com/file/d/1d5JimwdFOymORe-NiEQi18bf2LpHzaME/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29671
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 6 (11-12/2017) . - p. 312-317[article]Réservation
Réserver ce documentUse of viscoelastic changes to demonstrate the relationship between drying parameters - A prelaminary study / William R. Wise in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 1 (01/2016)
[article]
Titre : Use of viscoelastic changes to demonstrate the relationship between drying parameters - A prelaminary study Type de document : texte imprimé Auteurs : William R. Wise, Auteur ; Anthony D. Covington, Auteur ; Karl Flowers, Auteur ; Adriano Peruzzi, Auteur Année de publication : 2016 Article en page(s) : p. 24-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermomécanique dynamique
Cuir -- Séchage
Gravimétrie (chimie analytique)
Taguchi, Méthodes de (Contrôle de qualité)
ViscoélasticitéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Dynamic mechanical thermal analysis (DMTA) is routinely used for mechanical analysis by the polymer industry to provide information on the viscoelastic properties of a material. This report reveals how DMTA has been used to further previous studies by providing insight into the differences between post-tanned leathers (chromium and chromium-free). It demonstrates the potential to correlate the results with an industrial application such as optimization of the drying conditions during cell rotary conditioning (CRC). DMTA can indicate leather fiber response to changes in atmospheric humidity and temperature, potentially facilitating real-time adaptation of conditions during leather drying. Initial DMTA results show that post-tanning, particularly fatliquoring, changes the rate of drying and allows scientists to advise on optimal leather drying conditions based on viscoelastic changes. Note de contenu : - Leather raw materials
- conditioning
- Dynamic mechanical thermal analysis
En ligne : https://drive.google.com/file/d/17J0DqREH4Vev-lTTyMr6DJ-b6UVF5v74/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25275
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 1 (01/2016) . - p. 24-29[article]Réservation
Réserver ce document