Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Graphene-modified hybrid coating for improving the atomic oxygen erosion resistance of Kapton in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)
[article]
Titre : Graphene-modified hybrid coating for improving the atomic oxygen erosion resistance of Kapton Type de document : texte imprimé Année de publication : 2024 Article en page(s) : p. 401-411 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de silicium
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.
Matériaux hybrides
Oxygène atomique
Revêtements
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 667.9 Revêtements et enduits Résumé : To improve the atomic oxygen (AO) erosion resistance of Kapton for application as an aerospace material in low earth orbit (LEO), a graphene-modified polysiloxane-60 vol.% SiO2 (G-PSS) composite coating was prepared and tested for AO exposure at a total flux of 1.86 × 1020 atoms/cm2. The prepared coating with a thickness of 5 μm was smooth, with good adhesion and no macroscopic defects. Its AO erosion yield was 9.77 × 10−27–1.25 × 10−26 cm3/atom, which was about three orders and one order of magnitude lower than that of Kapton and polysiloxane-60vol.%SiO2 (PSS) hybrid coating, respectively. The beneficial effect of graphene was attributed to the effective inhibition of gas permeation by the single-layer graphene due to its unique structure and the more stable epoxy groups produced during the reaction of graphene with AO. Note de contenu : - EXPERIMENTAL : Preparation of the G-PSS composite coating - AO exposure test - Surface morphology and phase composition
- RESULTS AND DISCUSSION : Characterizations of the composite coating - AO erosion - Effect of graphene in the composite coating
- Table 1 : Appearance and adhesion classification of coatings according to the cross-cut test standard
- Table 2 : Element concentrations of Si, C, and O on the surface of the G-PSS composite coating before and after AO exposureDOI : https://doi.org/10.1007/s11998-023-00832-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00832-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40461
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 401-411[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24443 - 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
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020) . - p. 255-269[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Halloysite nanotubes-based nanocomposites for the hydrophobization of hydraulic mortar / Maria Rita Caruso in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Halloysite nanotubes-based nanocomposites for the hydrophobization of hydraulic mortar Type de document : texte imprimé Auteurs : Maria Rita Caruso, Auteur ; Bartolomeo Megna, Auteur ; Lorenzo Lisuzzo, Auteur ; Giuseppe Cavallaro, Auteur ; Stefana Milioto, Auteur ; Giuseppe Lazzara, Auteur Année de publication : 2021 Article en page(s) : p. 1625-1634 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Cires
Colorimétrie
Couches minces
HalloysiteL'halloysite-7Å est une espèce minérale du groupe des silicates sous-groupe des phyllosilicates de formule Al2Si2O5(OH)4 avec des traces de : Ti ; Ca ; Na ; K ; Fe ; Cr ; Mg ; Ni ; Cu. Ses principaux constituants, outre l'oxygène, sont l’aluminium (20,90 %), le silicium (21,76 %), et l’hydrogène (1,56 %).
Matériaux cimentaires -- Revêtements protecteurs
Matériaux hybrides
Mortier
Mouillabilité
Nanotubes
Particules (matières)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The treatment of stone surfaces for their protection from ageing caused by natural and anthropogenic effects is an open issue in materials development for Cultural Heritage. We thought interesting to verify the suitability of a modified cellulose biofilm filled with halloysite nanotubes as wax compatibilizers to design a protecting layer. A hydraulic mortar was selected as a stone prototype. To improve the physico-chemical properties of the covering layer, wax microparticles have been incorporated to control transport, consolidation and wettability features. In particular, different application protocols have been studied, namely brushing and spraying, to assess whether the proposed procedures can be scaled up. Colorimetric analysis has been carried out to evidence the applicability in terms of color alteration after the treatment. Water adhesion was investigated by measuring the contact angle values as a function of time to obtain information on spreading and adsorption phenomena. These physico-chemical properties have been correlated to the microstructure evidenced by both electron and optical microscopies. Note de contenu : - EXPERIMENTAL SECTION : Materials - Methods - Stone sample materials - Application on stone surface
- RESULTS AND DISCUSSION : Preparation and morphological properties of the protective coating - Colorimetric analysis and wettability
- Table 1 : Color Parameters a
- Table 2 : Fitting parameters from water contact angle dataDOI : https://doi.org/10.1007/s11998-021-00522-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00522-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36821
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1625-1634[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Halogen-free, radiation-curable, high refractive index materials / Jeffrey Wang in COATINGS TECH, Vol. 6, N° 3 (03/2009)
[article]
Titre : Halogen-free, radiation-curable, high refractive index materials Type de document : texte imprimé Auteurs : Jeffrey Wang, Auteur ; Marcus Hutchins, Auteur ; Kenneth Woo, Auteur ; Chris Matayabas, Auteur ; Toru Konish, Auteur Année de publication : 2009 Article en page(s) : p. 44-49 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages.
Halogènes -- Suppression ou remplacement
Matériaux hybrides
Matériaux réfractaires
Nanoparticules
Nanotechnologie
Résines acryliques
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : Halogen-free, radiation-curable, high refractive index materials. High refractive index (RI) materials, especially radiation-curable high RI materials, have been used in a wide variety of optical, photonic, and electronic applications. There are now fast-growing demands for new materials which offer even higher RI, higher performance, and, especially, are halogen-free because of increasing environmental concerns. Achieving equivalent RI without the use of halogenated materials, however, has been a major hurdle until now. A unique, inorganic-organic hybrid nanocomposite technology platform has been developed which significantly improves nanoparticle compatibility with acrylated resins and, most important, minimizes viscosity increase. Unlike many nanoparticle dispersions which show various degrees of haziness because of particle agglomerations, this inorganic-organic hybrid nanocomposite technology demonstrates excellent optical transparency. Technical results from the newly developed high RI technologies, along with existing tehnologies for comparison purpose, are discussed in this article. En ligne : https://drive.google.com/file/d/14KcECS9QyWKGf12Ve6ro2IayTSAgFV-a/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4814
in COATINGS TECH > Vol. 6, N° 3 (03/2009) . - p. 44-49[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 011220 - Périodique Bibliothèque principale Documentaires Disponible High-confidence performance predictions for hybrid thermoplastic composite applications / Subhransu Mohapatra in JEC COMPOSITES MAGAZINE, N° 121 (05-06/2018)
[article]
Titre : High-confidence performance predictions for hybrid thermoplastic composite applications Type de document : texte imprimé Auteurs : Subhransu Mohapatra, Auteur ; Syed Muhammad Kashif, Auteur ; Warden Schijve ; Recep Yaldiz Année de publication : 2018 Article en page(s) : p. 62-66 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Assemblages multimatériaux
Composites à fibres -- Propriétés mécaniques
Composites à fibres -- Surmoulage
Composites à fibres courtes
Composites à fibres longues
Essais (technologie)
Flexion (mécanique)
Matériaux hybrides
Prévision, Théorie de laIndex. décimale : 668.4 Plastiques, vinyles Résumé : Multi-material hybrid structures combining continuous fibre thermoplastic composites with lower-cost options such as chopped fibre thermoplastic composites and metals are an attractive proposition for many industries due to their potential lower weight and cost. High confidence in performance predictions is one of the key enablers to convert this potential into successful industry adoption. However, chopped and continuous fibre thermoplastic composites pose numerous challenges for accurate predictions, due to the inherent complexity of the material behaviour.
To establish confidence in predictions, a test component was designed that can be produced in a representative production process and can validate all of the many different composite failure modes.Note de contenu : - Hybrid overmoulding process and material forms
- Validation test set-up
- Establishing the predictive methodology : Material modelling for UD tapes - Material modelling of overmoulded plastics
- Test-CAE correlation : Integrated simulation chain
- Fig. 1 : Hybrid overmoulding technology for thermoplastic hybrid components : 1) pick up of the composite blank ; 2) IR heating ; 3) blank fixation in the mould ; 4) blank thermoforming ; 5) injection overmoulding ; and 6) part demoulding
- Fig. 2 : Sabic's composite material portfolio
- Fig. 3 : Four-point bending hybrid test component. Note the depression in the mid-test section. 3D cross section showing a highly asymmetric UD insert layout
- Fig. 4 : Example of a damage initiation surface as a function of stress tri-axiality (PVC)
- Fig. 5 : Effects of including damage physics
- Fig. 6 : Repeatibility of physical tests
- Fig. 7 : Comparison between the test and abaqus results for static cases ; the solid lines are test resluts, the dotted lines are simulation results
- Fig. 8 : Comparison between the test and LS-DYNA results for a dynamic compression case
- Fig. 9 : Integrated siumlation chain, using mapping softwarePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30949
in JEC COMPOSITES MAGAZINE > N° 121 (05-06/2018) . - p. 62-66[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19930 - Périodique Bibliothèque principale Documentaires Disponible High-performance natural fibre tape and spread tow fabric / Mahmudul Akonda in JEC COMPOSITES MAGAZINE, N° 72 (04-05/2012)
PermalinkHighly improved UV-shielding and mechanical properties of UV-curable epoxy acrylate nanocomposites by incorporating functionalized aramid nanofibers / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)
PermalinkHighly transparent thermal stable silicone/titania hybrids with high refractive index for LED encapsulation / Yamen Lai in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)
PermalinkHomogeneous dispersion of cellulose/graphite oxide nanofibers in water-based urushiol coatings with improved mechanical properties and corrosion resistance / Lei Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
PermalinkPermalinkHybrid coatings as transducers in optical biosensors / K. Rose in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 4 (12/2008)
PermalinkHybrid low modulus sealants - minerals for performance enhancement and process optimisation / Shamila Grigorieff in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4664 (09/2020)
PermalinkHybrid nonwovens-based composite made of banana fiber and biodegradable polyester / Maryam Sodagar in MAN-MADE FIBERS INTERNATIONAL, Vol. 73, N° 1 (2023)
PermalinkHybrid organic/inorganic coatings produced using a dual-cure mechanism / Jie He in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 4 (07/2012)
PermalinkHybrid polymers for high performance coatings / Vijay C. Karandikar in PAINTINDIA, Vol. LVI, N° 2 (02/2006)
PermalinkHybrid powders : scratch resistance and good flow in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 12, N° 1 (2019)
PermalinkHybrid sol-gel coatings for corrosion protection of galvanized steel in simulated concrete pore solution / Riba B. Figueira in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
PermalinkPermalinkHybridisation - A toolbox for efficient lightweight production / Kai Fischer in JEC COMPOSITES MAGAZINE, N° 111 (03/2017)
PermalinkHydrophobic, transparent waterborne UV-curable polyurethane nanocomposites based on polycarbonate and PCL-PDMS-PCL reinforced with colloidal silica / Shengven Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
Permalink