Antibacterial natural leather for application in the public transport system / M. Pollini in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 2 (03/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 2 (03/2013) . - p. 239-245 Titre : Antibacterial natural leather for application in the public transport system Type de document : texte imprimé Auteurs : M. Pollini, Auteur ; F. Paladini, Auteur ; A. Licciulli, Auteur ; A. Maffezzoli, Auteur ; A. Sannino, Auteur ; L. Nicolais, Auteur Année de publication : 2013 Article en page(s) : p. 239-245 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Antimicrobiens Argent Cuir Traîtements de surface Transports urbains Index. décimale : 667.9 Revêtements et enduits Résumé : In the public transport system, hand-touch surfaces such as seats in buses, trains, trams, and airplanes represent a reservoir of bacteria and a potential risk for contamination among passengers. The antimicrobial activity of silver has been known since ancient times. In this work, natural leather commonly used in the public transport system was treated with silver through the in situ photoreduction of a silver solution. The morphology of the coating and the distribution of silver clusters were studied by scanning electron microscopy and by energy dispersive X-ray spectroscopy. The amount of silver on the surface was quantified by thermo-gravimetric analysis. The antibacterial capability of the treated materials was checked against Gram-positive and Gram-negative bacteria. Taber test was conducted on silver treated samples in order to study the durability of the treatment. The morphology of the silver coating and its antibacterial capability were analyzed also after the Taber test. DOI : 10.1007/s11998-012-9439-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9439-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18248 [article]

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Epoxy resin catalyzed by graphite-based nanofillers / C. Esposito Corcione in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 5 (11/2016)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 5 (11/2016) . - p. 548-553 Titre : Epoxy resin catalyzed by graphite-based nanofillers Type de document : texte imprimé Auteurs : C. Esposito Corcione, Auteur ; M. R. Acocella, Auteur ; A. Giuri, Auteur ; A. Maffezzoli, Auteur Année de publication : 2016 Article en page(s) : p. 548-553 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Catalyse Charges (matériaux) Epoxydes Graphène Le graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur. Graphite Matériaux hybrides Nanoparticules Réticulation (polymérisation) Index. décimale : 668.4 Plastiques, vinyles Résumé : Graphene stacks/epoxy nanocomposites were produced and characterized in order to analyse the effect of different graphene precursors on cure reaction of a model epoxy matrix. A kinetic analysis of the cure mechanism of the epoxy resin associated to the catalytical activity of the graphite based fillers was performed by isothermal DSC measurements. The DSC results showed that the addition of all graphite based fillers greatly increased the enthalpy of epoxy reaction and the reaction rate, confirming the presence of a catalytic activity of graphitic layers on the crosslinking reaction between the epoxy resin components (epoxide oligomer and di-amine). A kinetic modelling analysis, arising from an autocatalyzed reaction mechanism, was finally applied to isothermal DSC data, in order to predict the cure mechanism of the epoxy resin in presence of the graphite based nanofiller. Note de contenu : - EXPERIMENTAL : Materials - Synthetic procedures - Characterization Techniques - RESULTS : Kinetics of the epoxy resin curing (crosslinking) reaction by DSC DOI : 10.3139/217.3225 En ligne : https://drive.google.com/file/d/1z9tTTNIqbyapbkaRpB0YA8cjpmdyLGBv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27379 [article]

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Rotational molding of polyamide-6 nanocomposites with improved flame retardancy / E. Calò in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 3 (07/2012)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 3 (07/2012) . - p. 370-377 Titre : Rotational molding of polyamide-6 nanocomposites with improved flame retardancy Type de document : texte imprimé Auteurs : E. Calò, Auteur ; C. Massaro, Auteur ; R. Terzi, Auteur ; A. Cancellara, Auteur ; E. Pesce, Auteur ; M. Re, Auteur ; A. Greco, Auteur ; A. Maffezzoli, Auteur ; P. I. Gonzalez, Auteur ; A. Salomi, Auteur Année de publication : 2012 Article en page(s) : p. 370-377 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermomécanique Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Matières plastiques -- Rotomoulage Montmorillonite Polyamide 6 Rhéologie Index. décimale : 668.4 Plastiques, vinyles Résumé : The aim of this work was to develop polyamide-6/ organic modified montmorillonite (omMMT) nanocomposites for the production of hollow parts by rotational molding. Particular emphasis was placed on the mechanical and flame retardancy properties needed for the fabrication of vessels for flammable liquids. The morphology of the melt compounded nanocomposites, produced by melt compounding, was investigated by Xray diffraction measurements (WAXD), and Transmission Electron Microscopy (TEM) showed an exfoliated structure. Rheological measurements were used in order to verify whether the viscosity of materials was adequate for rotational molding. While thermomechanical analysis has revealed that neat PA6 and its nanocomposites were not suitable for rotational molding, due to the very low thermal stability of the polymer, the addition of a thermal stabilizer, shifted the onset of degradation to higher temperatures, thus widening the processing window of both PA6 and PA6 nanocomposites. Largescale vessel prototypes were obtained by rotational molding of thermo-stabilized PA6 and its nanocomposites, and samples extracted from the rotomolded parts were characterized with respect to physical and mechanical properties. It was found that the PA6 nanocomposites exhibited significant improvements at cone calorimeter tests in comparison with neat PA6. DOI : 10.3139/217.2552 En ligne : https://drive.google.com/file/d/1FTUKzbnIG5oK6lzcCucRm0UPr0OtatOk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15583 [article]

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Solubility and durability of cardanol derived plasticizers for soft PVC / A. Greco in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 5 (11/2016)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 5 (11/2016) . - p. 577-586 Titre : Solubility and durability of cardanol derived plasticizers for soft PVC Type de document : texte imprimé Auteurs : A. Greco, Auteur ; F. Ferrari, Auteur ; R. Velardi, Auteur ; M. Frigione, Auteur ; A. Maffezzoli, Auteur Année de publication : 2016 Article en page(s) : p. 577-586 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption Cardanol Chlorure de polyvinyle Durée de vie (Ingénierie) Epoxydation Essais accélérés (technologie) Gélification Plastifiants Rhéologie Solubilité Souplesse (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : The aim of this work is the analysis of the suitability of cardanol derivatives as primary plasticizer for polyvinyl chloride (PVC). Cardanol derived plasticizers (CDP) were obtained by acetylation of cardanol, followed by epoxidation of the side chain double bonds. The developed procedures allowed to achieve high yields of acetylated cardanol, whereas plasticizers characterized by different yields of epoxidation were obtained, according to the used synthesis procedure. Rheological analysis was used in order to study the gelation process of PVC plastisols with CDP. A comparison of commercial phthalate and natural derived plasticizers showed that the CDP are characterized by adequate gelation properties, involving a complete absorption of the plasticizers at relatively low temperatures. The gelation properties showed a strong dependence on the yield of the epoxidation. In particular, lower gelation temperatures, higher plasticizer absorption and faster gelation were observed for higher epoxy content in the plasticizer. Finally, ageing tests were performed on soft PVC produced by the CDP. The weight loss of soft PVC with CDP is comparable to that of commercial plasticizers, particularly at high yields of epoxidation. DOI : 10.3139/217.3237 En ligne : https://drive.google.com/file/d/1YK59j8qoG1stCxiIvFJoeZBS3bl0mwKo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27395 [article]

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