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Cathodic electrodeposition of self-curable polyepoxide resins based on cardanol / Raju Pramod Kumar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)
[article]
Titre : Cathodic electrodeposition of self-curable polyepoxide resins based on cardanol Type de document : texte imprimé Auteurs : Raju Pramod Kumar, Auteur Année de publication : 2011 Article en page(s) : p. 563-575 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cardanol
Couches minces
Dépôt électrolytique
Epaisseur -- Mesure
Epoxydes
Formaldéhyde
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Cathodic electrodeposition (CED) behavior and film properties of coating binders as modified polyepoxide resins based on cardanol, a constituent of Cashew Nut Shell Liquid (CNSL), have been studied. These coating binders were synthesized by epoxidation of cardanol–formaldehyde novolacs (CNs) with epichlorohydrin and subsequently modified with secondary amine to make them water-thinnable by neutralization with acetic acid, and suitable for CED. Laboratory synthesized coating binders, modified, epoxidized cardanol–formaldehyde novolacs (MECNs), were cathodically electrodeposited on pretreated MS panels to investigate their electrodeposition behavior and film properties of deposited coating binders. Among the nine MECNs prepared by varying molar ratios of cardanol to formaldehyde as well as ECN to DEtOA, only seven MECNs (MECN1, MECN2, MECN3, MECN6, MECN7, MECN8, and MECN9) were water-soluble and electrodepositable, whereas MECN4 and MECN5 were not water soluble, and hence not considered for further studies. These seven MECNs were used for the study of their electrodeposition characteristics, such as electrodeposition yield (ED yield), coulombic yield (CY), dry film thickness (DFT), and properties of their deposited films. The most suitable molar ratio of ECN:DEtOA for the preparation of MECNs was found to be 1:1. The CN prepared by using cardanol and formaldehyde in the molar ratio of 1:0.7 was used for the preparation of ECN2 and MECN2 prepared from this was found to be the most suitable in terms of deposition behavior and overall film properties. The film of MECN2 electrodeposited at constant voltage (100 V) was found to be the best in terms of film properties along with corrosion resistance, as it passed 800-h exposure to salt spray atmosphere. MECN2 was optimized for its electrodeposition characteristics like ED yield as 3.62 mg/cm2, CY as 35.87 mg/C, and DFT as 25.26 μm. Through a wide cure window, the films of MECN2 were found to be self-curable at an optimum cure schedule of 160°C/30 min. The electrodeposited films of MECNs had good physical, chemical, and corrosion resistance properties, but demonstrated low resistance to xylene, in particular. The study emphasized the electrodeposition behavior and film properties of the prepared MECN resins as binders for CED coating formulations, which were self-curable without using any external crosslinker. The self-curing of the deposited films was achieved via a novel self-curing mechanism, i.e., one molecule chemistry through anionic polymerization. The prepared epoxide resins as MECNs could be cathodically electrodeposited as primer coat for the protection of metallic substrates against corrosion. Note de contenu : EXPERIMENTAL : Materials - Evaluation of film properties - General mechanisms of cathodic electrodeposition - Experimental design : cathodic electrodeposition of binders - Preparation of test panels - Preparation of electrolytic composition - Cathodic electrodeposition of coating binders derived from cardanol as MECNs.
RESULTS AND DISCUSSION : Cure characteristics of deposited coating binders as MECNs - Optimization of the electrodeposition parameters - Current density - Electrodeposition yield - Coulombic yield - Dry film thickness - Kinetics of films growth during cathodic electrodeposition - Specific conductivity of the deposited films - measurement of gloss - Evaluation of film properties - Physical properties - Chemical resistance properties.DOI : 10.1007/s11998-011-9337-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9337-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12232
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 5 (10/2011) . - p. 563-575[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13360 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Caught firm in the tangle of the pores : Deep filtration for total cleanliness Type de document : texte imprimé Année de publication : 2003 Article en page(s) : p. 51-52 Langues : Anglais (eng) Catégories : Filtration
Filtres
Impuretés
Nontissés
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : The extent to which disturbing particles can be removed from coatings materials depends on the size of the particles and the consistency of the material. Whilst dirt particles with a large diameter can be removed by means of surface filtration, this is not so easily done with small particles. The only possibility here is deep filtration. There is a wide range of such filtering methods and materials available, which will be described in this article. Note de contenu : - Random-laid non-woven fabric as filter-material
- Bag filters : from the inside to the outside
- Filter elements : from the inside to the outside
- Plate filters have large surfaces
- Fig. 1 : Whilst with bag filters the material to be filtered is conducted through the filter medium from the inside to the outside
- Fig. 2 : Production flow in filter elements goes from the outside to the insideEn ligne : https://drive.google.com/file/d/1mgLfwTwuZ69LNNvXyB3FcsDBql6YT_gl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40670
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8/03 (07-08/2003) . - p. 51-52[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000662 - Périodique Bibliothèque principale Documentaires Disponible Cellulose reinforced-TiO2 photocatalyst coating on acrylic plastic for degradation of reactive dyes / Nageswara Rao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 5 (09/2010)
[article]
Titre : Cellulose reinforced-TiO2 photocatalyst coating on acrylic plastic for degradation of reactive dyes Type de document : texte imprimé Auteurs : Nageswara Rao, Auteur ; Priyanka Joshi, Auteur Année de publication : 2010 Article en page(s) : p. 643-650 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cellulose La 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.
Colorants réactifs
Dioxyde de titane
Photocatalyse
Photodétérioration
Polyacryliques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, cellulose reinforced-TiO2 (C-T) film was coated on acrylic plastic sheet and used for UV photocatalytic degradation of four reactive dyes viz., Reactive Black 5, Reactive Red 11, Reactive Orange 16, and Reactive Red 2 in a falling film reactor (FFR). Slurry comprising cellulose and TiO2 in suitable weight proportions (5, 10, 15, and 25 wt% cellulose) was prepared and a C-T film was obtained by brush coating on acrylic plastic sheet. The composition yielding adherent film and efficient for the dye degradation was identified. The effect of hydraulic flow rate and solution pH on the stability of the C-T films was also investigated. The photocatalytic coating containing 15 wt% cellulose was found to be adherent and efficient for dye degradation. The photodegradation of the reactive dyes, monitored in terms of decolorization (>80%), and reduction in total organic carbon (TOC) during 5 h followed pseudo first-order kinetics. The mineralization efficiency at 5 h treatment using 15 wt% C-T coating was in the range 75.4–83.3% for all the dyes. On the basis of optical microscopy images, the stability of the C-T films obtained from 15 wt% cellulose was attributed to the interlacing of the cellulose fibers that reinforced the TiO2 coating. DOI : 10.1007/s11998-010-9244-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9244-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9918
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 5 (09/2010) . - p. 643-650[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012448 - Périodique Bibliothèque principale Documentaires Disponible Cement paints : A study / L. T. Gangotri in PAINTINDIA, Vol. LIV, N° 6 (06/2004)
[article]
Titre : Cement paints : A study Type de document : texte imprimé Auteurs : L. T. Gangotri, Auteur ; Shashank T. Mhaske, Auteur Année de publication : 2004 Article en page(s) : p. 41-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane
Matériaux cimentaires -- Revêtements:Matériaux cimentaires -- Peinture
Pigments
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Cement paints containing no hydrated lime were prepared and evaluated. Whiting, redoxide and titanium dioxide pigments were used in this investigation. The cement paint having 40% cement and 60% whiting was found to give excellent film properties. The study further showed that redoxide pigment can be used in cement paint up to 40% pigmentation, while titanium dioxide alone cannot be used. Note de contenu : - Efflorescence
- Composition of cement paint
- Preparation and evaluation of cement paints
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12015
in PAINTINDIA > Vol. LIV, N° 6 (06/2004) . - p. 41-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000454 - Périodique Bibliothèque principale Documentaires Disponible CFD model of slot die coating for lithium-ion battery electrodes in 2D and 3D with load balanced dynamic mesh refinement enabled with a local-slip boundary condition in OpenFOAM / Alexander Hoffmann in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
[article]
Titre : CFD model of slot die coating for lithium-ion battery electrodes in 2D and 3D with load balanced dynamic mesh refinement enabled with a local-slip boundary condition in OpenFOAM Type de document : texte imprimé Auteurs : Alexander Hoffmann, Auteur ; Sandro Spiegel, Auteur ; Thilo Heckmann, Auteur ; Philip Scharfer, Auteur ; Wilhelm Schabel, Auteur Année de publication : 2023 Article en page(s) : p. 3-14 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Accumulateurs lithium-ion
Electrodes
Enduction par filière
Mécanique des fluides numériquesLa mécanique des fluides numérique (MFN), plus souvent désignée par le terme anglais computational fluid dynamics (CFD), consiste à étudier les mouvements d'un fluide, ou leurs effets, par la résolution numérique des équations régissant le fluide. En fonction des approximations choisies, qui sont en général le résultat d'un compromis en termes de besoins de représentation physique par rapport aux ressources de calcul ou de modélisation disponibles, les équations résolues peuvent être les équations d'Euler, les équations de Navier-Stokes, etc.
La CFD a grandi d'une curiosité mathématique pour devenir un outil essentiel dans pratiquement toutes les branches de la dynamique des fluides, de la propulsion aérospatiale aux prédictions météorologiques en passant par le dessin des coques de bateaux. Dans le domaine de la recherche, cette approche est l'objet d'un effort important, car elle permet l'accès à toutes les informations instantanées (vitesse, pression, concentration) pour chaque point du domaine de calcul, pour un coût global généralement modique par rapport aux expériences correspondantes.
Domaines d'application : La CFD est particulièrement employée dans les domaines des transports, pour étudier notamment le comportement aérodynamique des véhicules (automobile, aéronautique, etc) conçus.
La CFD est également utilisée dans le domaine des installations critiques telles que les salles de serveurs. Elle permet de réaliser une représentation 3D de la salle, comprenant toutes les informations relatives aux équipements informatiques, électriques et mécaniques. On obtient une carte graduée des différentes zones de chaleur présentes, ce qui permet de détecter les zones critiques et les points chauds (ou "hot spots").
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Slot die coating is a state-of-the-art process to manufacture lithium-ion battery electrodes with high accuracy and reproducibility, covering a wide range of process conditions and material systems. Common approaches to predict process windows are one-dimensional calculations with a limited expressiveness. A more detailed analysis can be performed using CFD simulations, which are often based on in-house code or closed-source software. In this study, a two-phase CFD model in two and three dimensions was created in OpenFOAM with the intent to provide a method for more detailed investigations of the slot die coating process with open access to source code and files. A custom boundary condition enables the proper description of the wetting behavior in the two-dimensional model. The combination of standard no-slip boundary conditions at the substrate boundary with the volume-of-fluid solution algorithm leads to a method-related air entrainment, which was prevented by allowing local slip at the dynamic wetting line at the upstream meniscus in the two-dimensional model. Additionally, a load-balancing dynamic refinement algorithm was implemented to minimize the computational effort and increase the ease of use of the simulation environment. The simulation was validated by comparing the simulated process limits to experimental observations, showing good agreement. As a result, this model enables detailed analyses regarding the influences of slot die geometries, material properties, and process parameters on the coating stability and wet-film profile. Note de contenu : - EXPERIMENTAL MATERIALS AND METHODS : Material properties - Numerical methods
- RESULTS AND DISCUSSION : 2D-model
- Table 1 : Dry composition of the anode slurry used in this study
- Table 2 : Patch names and assigned boundary conditions for the two-dimensional numerical simulations
- Table 3 : Patch names and assigned boundary conditions for the three-dimensional numerical simulations
- Table 4 : Computational effort for different mesh resolutions and refinement methodsDOI : https://doi.org/10.1007/s11998-022-00660-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00660-8.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38777
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 3-14[article]Réservation
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