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Flow and heat transfer of two immiscible fluids in double-layer optical fiber coating / Zeeshan Khan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
[article]
Titre : Flow and heat transfer of two immiscible fluids in double-layer optical fiber coating Type de document : texte imprimé Auteurs : Zeeshan Khan, Auteur ; Saeed Islam, Auteur ; Rehan Ali Shah, Auteur ; Ilyas Khan, Auteur Année de publication : 2016 Article en page(s) : p. 1055-1063 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Fibres optiques
Modèles mathématiques
Revêtements multicouches
ThermocinétiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The coatings of optical fibers are generally characterized by a multi-layer coating structure. In this work, the mathematical modeling of two immiscible non-Newtonian fluids for optical fiber coating inside a straight annular die is developed in the form of a nonlinear differential equation with nonhomogeneous boundary conditions. Two non-Newtonian fluids, namely power law and Phan-Thien–Tanner fluids, are used in the primary and secondary coating dies, respectively. An exact solution is obtained for velocity fields and temperature distributions for the primary and secondary coating resins. The thickness of coated fiber optics is also calculated for both layers. The effect of different emerging parameters on the solution is discussed and sketched. DOI : 10.1007/s11998-016-9817-1 En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9817-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27261
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 6 (11/2016) . - p. 1055-1063[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18514 - Périodique Bibliothèque principale Documentaires Disponible Functional sheath for reinforcing fibers / Joris Kemperman in PLASTICS INSIGHTS, Vol. 113, N° 7 (2023)
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Titre : Functional sheath for reinforcing fibers : Basalt fibers coated with aluminum as an additive for plastics Type de document : texte imprimé Auteurs : Joris Kemperman, Auteur ; Martin Grolms, Auteur Année de publication : 2023 Article en page(s) : p. 61-63 Langues : Anglais (eng) Catégories : Aluminiage
Blindage (électricité)
Composites à fibres -- Additifs
Composites à fibres -- Propriétés mécaniques
Conduction électrique
Enduction textile
Fibres de basalte
Fibres textiles -- Métallisation
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Stabilité thermique
ThermocinétiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Electrical devices and e-mobility vehicles require good mechanical properties, including heat dissipation and EMI shielding. Composites lend themselves to this challenge, particularly those that combine suitable polymers as matrix materials with additives and reinforcing fibers. The Aachen-based start-up FibreCoat has developed special fibers that can be used to achieve many of the necessary properties while being lightweight and inexpensive. Note de contenu : - The material properties of the fibers in detail : Thermal conductivity and thermal stability - Electrical conductivity - EMI shielding - Mechanical properties - Fire protection
- Functionalize textiles and heat rooms
- Effectively kill germs
- Conclusion – More than a conductive additive
- Table : Physical properties of the coated basalt fibersEn ligne : https://drive.google.com/file/d/1fF9wkuuc7mbdywgHQ_oaXexxf93sdHcR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40338
in PLASTICS INSIGHTS > Vol. 113, N° 7 (2023) . - p. 61-63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24187 - Périodique Bibliothèque principale Documentaires Disponible Gambling with graphene... will it pay off ? / Edward Pullicino in JEC COMPOSITES MAGAZINE, N° 99 (09/2015)
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Titre : Gambling with graphene... will it pay off ? Type de document : texte imprimé Auteurs : Edward Pullicino, Auteur ; Costas Soutis, Auteur ; Mathieu Gresil, Auteur Année de publication : 2015 Article en page(s) : p. 41-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites thermoplastiques
Composites thermoplastiques -- Propriétés mécaniques
Conduction électrique
Epoxydes
GraphèneLe 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.
Nanotubes de carbone à parois multiplesUn nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets :
- le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ;
- le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier.
Polycarbonates
Thermocinétique
Traction (mécanique)Index. décimale : 620.1 Mécanique de l'ingénieur (mécanique appliquée) et matériaux Résumé : Graphene has been hailed as the miracle material of the 21st century. But so far, the most available commercial composite product with graphene in it is a tennis racket and that seems to be more of a marketing ploy than for engineering reasons. So does graphene really have limitless potential ? And if it does have potential, why hasn't graphene taken off yet ? These questions are discussed in this article from a structural composites perspective. Note de contenu : - Fig. 1 : Ants are strong for their size a bit like graphene. But can we extrapolate that strength from a small to a scale that structural engineers can use ? Graphene SEM image shown in bottom right
- Fig. 2 : Comparison of tensile strength of different nanoparticles added to epoxy. GLP = graphene. SWNT = single walled carbon nanotube. MWNT = multiwalled carbon nanotube
- Fig. 3 : FGS (functinalised graphene sheets) improves the Young's Modulus of epoxy up to a certain point ~ 0.1wt%. But adding more than this does not make any more improvements
- Fig. 4 : Improvement of electrical conductivity in a polycarbonate matrix. Conductivity increases quickly at first but soon levels off. This trend is seen in all polymers
- Fig. 5 : Thermal conductivity improves linearly when you add more graphene to epoxy. MLG = Multilayer graphene (up to 5 layers of graphene stacked on top of one anotherPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25517
in JEC COMPOSITES MAGAZINE > N° 99 (09/2015) . - p. 41-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17422 - Périodique Bibliothèque principale Documentaires Disponible 17421 - Périodique Bibliothèque principale Documentaires Disponible Graphene oxide/waterborne polyurethane nanocoatings : effects of graphene oxide content on performance properties / C. Bernard in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Graphene oxide/waterborne polyurethane nanocoatings : effects of graphene oxide content on performance properties Type de document : texte imprimé Auteurs : C. Bernard, Auteur ; D. G. Goodwin, Auteur ; X. Gu, Auteur ; M. Celina, Auteur ; M. Nyden, Auteur ; D. Jacobs, Auteur ; L. Sung, Auteur ; T. Nguyen, Auteur Année de publication : 2020 Article en page(s) : p. 255-269 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Adsorption
Caractérisation
Charges (matériaux)
Inflammabilité
Matériaux hybrides
Oxyde de graphène
Oxygène
Perméabilité
Polymères en émulsion
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements en phase aqueuse
Revêtements organiques
ThermocinétiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Graphene oxide (GO) is a good nanofiller candidate for waterborne coatings because of its outstanding physical and mechanical properties, good dispersibility in water, and low cost relative to graphene. Here, we report on the performance of a one-part, waterborne polyurethane (WPU) nanocoating formulated with four different GO loadings ([0.4% to 2.0%] by mass). The degree of GO dispersion/adhesion was evaluated using scanning electron microscopy, laser scanning confocal microscopy, and Raman microscopy. Nanocoating performance was evaluated using a dynamic mechanical thermal analyzer for mechanical properties, a customized coulometric permeation apparatus for oxygen barrier properties, a combustion microcalorimeter for flammability, a hot disk analyzer for thermal conductivity, thermogravimetric analysis for thermal stability, and a moisture sorption analyzer for water uptake. The results show that GO sheets were well dispersed in, and have good adhesion to, WPU. At the higher mass loadings ([1.2% or 2%] by mass), GO increased the modulus and yield strength of WPU by 300% and 200%, respectively, increased the thermal conductivity by 38%, reduced the burning heat release rate (flammability) by 43%, and reduced the oxygen permeability by up to sevenfold. The presence of GO, however, increased water vapor uptake at high humidity; the moisture content of 2% mass loading GO/WPU nanocoatings at 90% RH was almost twice that of the moisture content for unfilled WPU. Overall, with the exception of water uptake at very high humidity (> 70% RH), the observed improvements in physical and mechanical properties combined with the ease of processing suggest that GO is a viable nanofiller for WPU coatings. Note de contenu : - EXPERIMENTAL MATERIALS AND METHODS : Materials and preparation of GO/WPU nanocoatings - Characterization of GO/WPU nanocoating properties
- RESULTS AND DISCUSSION : Characterization of GO/WPU nanocoating dispersion quality - Mechanical properties - Oxygen permeability - Water sorption of GO/WPU nanocoatings at different relative humidity levels - Flammability - Thermal conductivityDOI : 10.1007/s11998-019-00267-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00267-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33743
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Heat and mass transfer studies on different leather materials / Rangasamy Parthiban / Saarbrücken [Germany] : Lambert Academic Publishing (2011)
Titre : Heat and mass transfer studies on different leather materials : Vacuum, chamber, natural and tunnel drying Type de document : texte imprimé Auteurs : Rangasamy Parthiban, Auteur Editeur : Saarbrücken [Germany] : Lambert Academic Publishing Année de publication : 2011 Importance : XI-100 p. Présentation : ill. Format : 22 cm ISBN/ISSN/EAN : 978-3-8443-9912-7 Prix : 49 E Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir -- Séchage
Thermocinétique
Transfert de masseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather is an important economic commodity. The feel of the leather invariably decides the quality of the leather. The rate and mode of drying alters the physico-mechanical properties of the leather significantly. Typically, in leather manufacture wet leathers with about 70% moisture levels are subjected to mechanical squeezing operation, samming, for removal of freely held water before subjecting to conventional drying processes to produce leathers with 15– 20% moisture. Experiments are conducted to gain a clear picture of how drying variable affects the mechanical properties of dried leathers. Shorter drying time and proper initial water content are favorable conditions to produce stronger and softer leather. Possibility have been explored of using mass quantity such as drying rate to generalize relationship between drying variables and mechanical properties. From the experiments, it can be concluded that by vacuum drying process stronger and softer leather can be achieved, which will have high tensile strength, grain crack strength and tongue tear strength. Further they would not undergo any wear and tear during finishing processes. Note de contenu : - INTRODUCTION : History of leather - Hide and skin - Difference by weight between hides and skins - Leather drying of leathers
- LITERATURE REVIEW : Drying of chrome tanned leather - Drying and evaporation - Important concepts in drying - Rate of drying curves
- THEORY OF DRYIERS : The dehumidification or chamber drying of leather - Vacuum drying - Natural dyring/open drying - Tunner drying - Property of leathers
- MATERIALS AND METHODS : Vacuum drying - Chamber or dehumidifier drying - Natural drying - Tunnel drying
- RESULTS AND DISCUSSION : Vacuum drying - Chamber drying - Natural drying - Tunnel drying - Consolidared results - Property of leather - Visual assessment - DiscussionsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36810 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23149 675 PAR Monographie Bibliothèque principale Documentaires Disponible Heat-conductive adhesives - cool solutions for versatile applications / Heiko Fauser in ADHESION - ADHESIVES + SEALANTS, Vol. 15, N° 3/2018 (2018)
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