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On the shrinkage kinetic of collagen / Guillermo O. Sarli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
[article]
Titre : On the shrinkage kinetic of collagen Type de document : texte imprimé Auteurs : Guillermo O. Sarli, Auteur ; J. Raùl Grigera, Auteur Année de publication : 1976 Article en page(s) : p. 113-114 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuirs et peaux
Température de retrait
ThermocinétiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The shrinkage kinetic of collagen was first used by Weirl to measure the activation enthalpy and entropy of the fibre-random coil transition of collagen.
The early results shown a relative simple kinetic, characterised by a single parameter, namely the half time of the process. Later on, a more sophisticated intepretation of the kinetic was suggested. The curves shown in these works are very simple.
The stability of collagen fibres is widely measured by means of the shrinkage temperature. This parameter is very easy to measure and, if the process is as simple as was described, it may well characterise the transition with enough accuracy. It is probable that on this account there have not been many new works published on shrinkage kinetic.Note de contenu : - Fig. 1 : Diagram of the apparatus
- Fig. 2a : Shrinkage kinetic of rat tail tendon hydrated 24 h in distilled water, a) Shrunk inwater
- Fig. 2b : Shrunk in aqueous solution of dioxane 4:11 molal.En ligne : https://drive.google.com/file/d/1NBQSXEFcgv_cWRfShkCnoB3elCrpObb0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35261
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 60 (Année 1976) . - p. 113-114[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008596 - Périodique Archives Documentaires Exclu du prêt Optical and temperature dependent electrical properties of poly (vinyl chloride)/copper alumina nanocomposites for optoelectronic devices / S. Suvarna in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)
[article]
Titre : Optical and temperature dependent electrical properties of poly (vinyl chloride)/copper alumina nanocomposites for optoelectronic devices Type de document : texte imprimé Auteurs : S. Suvarna, Auteur ; Annumaria Sebastian, Auteur ; Furhan, Auteur ; Manammel Thankappan Ramesan, Auteur Année de publication : 2023 Article en page(s) : p. 154-156 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine
Caractérisation
Chlorure de polyvinyle
Composites -- Propriétés optiques
Cuivre
Diélectriques
Matériaux hybrides
Modèles mathématiques
Stabilité thermique
ThermocinétiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : The practical applications of poly (vinyl chloride) have been constrained due to its poor thermal stability, low dielectric constant and inability to shield against ultraviolet (UV) radiation. In this study, we tried to improve the optical properties, thermal stability, temperature-dependent electrical conductivity and dielectric constant using copper alumina (Cu–Al2O3) nanoparticles reinforced poly (vinyl chloride) (PVC). Optical absorption measured with an ultraviolet-visible (UV-visible) spectrometer emphasises the blueshift in absorption edges and decreasing bandgap energies of PVC/Cu–Al2O3 nanocomposites compared to PVC. The presence of Cu–Al2O3 in PVC and its interaction with the polymer were confirmed by FTIR spectroscopy. Thermogravimetric analysis (TGA) demonstrates that nanocomposites have higher thermal stability than PVC, and that thermal stability increases with filler loading. Scanning electron microscopy (SEM) indicates the homogeneous dispersion of nanosized Cu–Al2O3 in the polymer matrix. The activation energy determined by the Arrhenius equation revealed that AC conductivity increases with the addition of nanoparticles up to a specific loading. The dielectric constant increases as a function of temperature and decreases with frequency. The magnitude of AC conductivity and dielectric constant were highest for 7 wt% loaded nanocomposites. The dielectric constant predicted by the Bruggeman and Maxwell-Garnet models were in good agreement with the experimental permittivity. The semiconducting nature of nanocomposites was investigated by impedance analysis. The semi-circular nature of Cole-Cole plots manifests the combination of parallel capacitance with low bulk resistance. The enhanced optical, thermal, electrical and dielectric properties of PVC/Cu–Al2O3 nanocomposites can be utilized in fabricating optoelectronic devices with excellent charge-storing ability. Note de contenu : - EXPERIMENTAL : Materials and methods - Synthesis of copper alumina nanoparticles - Preparation of poly (vinyl chloride)/copper alumina nanocomposites - Characterizations
- RESULTS AND DISCUSSION : UV-visible spectroscopy - Optical bandgap energy - Fourier transform IR spectroscopy - SEM analysis - Thermogravimetric analysis - AC conductivity - Dielectric constant - Dielectric modelling - Impedance studies
- Table 1 : Activation energy of PVC/Cu–Al2O3 nanocomposites at different frequenciesDOI : https://doi.org/10.1515/ipp-2022-4270 En ligne : https://drive.google.com/file/d/1PiSW7w4CgwZjlcALwPviqWqCkaTm2GKW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39498
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 2 (2023) . - p. 154-156[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24121 - Périodique Bibliothèque principale Documentaires Disponible Optimization and application of a low-density epoxy composite coating for autonomous air-to-deep sea vehicles / Michael J. Grzenda in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : Optimization and application of a low-density epoxy composite coating for autonomous air-to-deep sea vehicles Type de document : texte imprimé Auteurs : Michael J. Grzenda, Auteur ; Marco M. Maia, Auteur ; Aristedes Costeas, Auteur ; Paul N. Ferri, Auteur ; Francisco Javier Diez, Auteur ; Jonathan P. Singer, Auteur Année de publication : 2022 Article en page(s) : p. 1523-1534 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Electronique -- Matériaux
Epoxydes
Matériaux hybrides
Revêtements organiques
Revêtements protecteurs
Sous-marins
ThermocinétiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Unmanned, autonomous air-to-sea vehicles, fully capable of transitioning between the two mediums, have only recently become technologically possible and have attracted great interest due to their numerous applications. However, current vehicles are unable to withstand the environmental conditions of the deep sea, especially with regards to their electronics. Previous methods for protecting electronics in the deep sea are not optimized for transitions to air. Here, a novel, lightweight, thermally-conductive, easily processed, mechanically robust, epoxy-based nanocomposite coating is presented. This material was developed with the intention of bringing the multi-domain air-water drone, known as the Naviator, to the deep ocean. In this work, the coating is thoroughly characterized and demonstrated to protect electronics submerged in water at high-pressure benchtop conditions as well as in an actual deep sea mission. The coating is also contrasted against unmodified epoxy, as well as commercial syntactic foam, and deemed superior for this application. Note de contenu : - EXPERIMENTAL SECTION : Methodology - Materials - Processing - Characterization - Benchtop testing
- RESULTS AND DISCUSSION : Material characterization - Material performance
- Table 1 : Notable aerial-aquatic vehicles
- Table 2 : All tests performed on the same nanocomposite ESC board in orderDOI : https://doi.org/10.1007/s11998-022-00627-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00627-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38287
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1523-1534[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible Optimized heat dissipation of energy storage systems / Michael Frauenhofer in ADHESION - ADHESIVES + SEALANTS, Vol. 17, N° 3/2020 (2020)
[article]
Titre : Optimized heat dissipation of energy storage systems Type de document : texte imprimé Auteurs : Michael Frauenhofer, Auteur ; Marc Gormanns, Auteur ; Martin Simon, Auteur ; Martin Rütters, Auteur ; Holger Fricke, Auteur Année de publication : 2020 Article en page(s) : p. 12-17 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Dissipation d'énergie
Energie thermique
Piles électriques
Thermocinétique
Véhicules électriquesIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : The quality of the heat dissipation from batteries towards the outer casinghas a strong impact on the performance and life on an electric vehicle. The heat conduction path between battery module and cooling system is realized in series production electric vehicles by measn of paste-like materials. These so-called gap fillers exhibit high thermal conductivity and specific mechanical properties. The aim of an ongoing BMWi research project is to develop a new generation of gap fillers with improved thermal conductivity and reduced density and to qualify them for use in series production. Note de contenu : - Significance of the gap filler
- The OWES research project
- Challenge in the formulation of gap fillers
- Further development of ceramic fillers
- Aluminum based fillers
- Carbon based fillers
- Carbon-AlOx hybrid based filler
- Manufacturing properties
- Simulation of squeezing flows
- The squeeze flow experiment
- Fluid structure interaction simulations
- Simulation of the battery assembly process
- Industrial use of the simulations
- Fig. 1 : Before inserting the cell modules into the compartment floor, a heat-conducting gap filler is inserted
- Fig. 2 : Cooperation in the OWES project
- Fig. 3 : Influence of the degree of filling on density, thermal conductivity and viscosity on conventional materials (dashed) and improvement materials targeted in the project
- Fig. 4 : Comparison of the thermal conductivities when replacing aluminium oxide by adding graphite and corresponding densities of the mixtures
- Fig. 5 : The squeeze flow experiment is used to predict the force and the pressure when squeezing gap fillers
- Fig. 6 : Simulation of a squeeze flow experiment on the bases of rheological data determined by a fluid structure simulation (FSI)
- Fig. 7 : Experiment on the deflection of a metal sheet by the flow of a pink gap filler and comparison with the simulation
- Fig. 8 : Comparison of experiment and simulation at component
- Fig. 9 : Importance of the simulation of a complete component for industrial productionEn ligne : https://drive.google.com/file/d/1O6T29vV8_DaIcWyY49xdX5nEZYgs_x86/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34643
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Code-barres Cote Support Localisation Section Disponibilité 22256 - Périodique Bibliothèque principale Documentaires Disponible Paints that keep their cool / Jean-Claude Auger in EUROPEAN COATINGS JOURNAL (ECJ), N° 12 (12/2015)
[article]
Titre : Paints that keep their cool : Making the best use of heat dissipative finishes in LED lighting systems Type de document : texte imprimé Auteurs : Jean-Claude Auger, Auteur ; Mark Taylor, Auteur Année de publication : 2015 Article en page(s) : p. 38-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chaleur -- Rayonnement et absorption
Diodes électroluminescentes
Dissipation d'énergie
Equipements électroniques ou électriques (EEE)
Matériaux -- Propriétés fonctionnelles
Revêtements:Peinture
ThermocinétiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Heat dissipative paints have been developed to assist in cooling electronic systems. Ordinary coatings, however, have a fairly high emissivity (radiative efficiency) regardless of colour. The formulation of heat dissipative coatings and the conditions under which they will be most effective are discussed. Note de contenu : - The theory : basic physical quantities
- The three mechanisms of heat propagation summarised : conduction - convection - radiation
- Heat propagation in a simple steady-state example
- Summary of heat transfers in a simple model
- Heat transfer considered as analogous to electricity
- Practical considerations : the optimum propagation path
- Surface temperature control at the solid/air interface
- Optimising the conductivity of heat dissipating paints
- Optimising the emissivity
- Optimising the convection
- Applying the theory to LED lighting
- How a coating layer affects thermal resistance
- Effect of specially designed heat dissipative paintsEn ligne : https://drive.google.com/file/d/1w3qdHPQ8nFXNFOhf_fwqz34106sMTDKS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25056
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Code-barres Cote Support Localisation Section Disponibilité 17675 - Périodique Bibliothèque principale Documentaires Disponible PE/carbon black compounds for fiber-based heating / Merle Bischoff in CHEMICAL FIBERS INTERNATIONAL, Vol. 66, N° 1 (03/2016)
PermalinkPhysical and thermomechanical characteristics of epoxy biocomposites laminates reinforced by mat of date palm tree fibers / Youcef Djebloun in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 6 (12/2022)
PermalinkPlastiques. Résines phénoliques - Norme NF EN ISO 11409 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1998)
PermalinkLes plastiques thermoélectriques / Claire Pham in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 927 (01-02/2016)
PermalinkPolymères conducteurs thermiques pour échangeurs de chaleur / Daniel Bougeard in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 941 (09/2017)
PermalinkPower transfer in complex shape heated moulds or functional composites / Guillaume Tiberghien in JEC COMPOSITES MAGAZINE, N° 99 (09/2015)
PermalinkPreparation and characterization of melamine modified urea-formaldehyde foam / Y. Ma in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 2 (05/2013)
PermalinkPreparation and characterization of reduced graphene oxide based natural rubber nanocomposites / F. Shahamatifard in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 5 (11/2020)
PermalinkPreparation and property analysis ofphase change concrete PEG/SiO2-CPCM in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 1 (02/2019)
PermalinkPreparation and rheological behavior of lead-free graphite conducting paste / Luo Shiyong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)
PermalinkProcessing of polymer nanocomposites / Samuel Kenig / Munchen [Germany] : Hanser (2019)
PermalinkProperties of shoe leathers and their measurement / H. Bradley in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXI (Année 1966)
PermalinkPropriétés des briques de terre compressées réalisées à partir de matériaux traditionnels du Bénin / Philippe Poullain in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 4 (08/2019)
PermalinkA question of orientation / Thies Falko Pithan in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 1 (01/2020)
PermalinkRecipe for an extra portion of conductivity / Klaus Rathberger in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 4 (04/2017)
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