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Ultrasonic nebulization-assisted layer-by-layer assembly for spray coating of multilayered, multicomponent, bioactive nanostructures / Skylar S. Stewart-Clark in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 2 (03/2011)
[article]
Titre : Ultrasonic nebulization-assisted layer-by-layer assembly for spray coating of multilayered, multicomponent, bioactive nanostructures Type de document : texte imprimé Auteurs : Skylar S. Stewart-Clark, Auteur ; Yuri M. Lvov, Auteur ; David K. Mills, Auteur Année de publication : 2011 Article en page(s) : p. 275-281 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Assemblages (technologie)
Dexaméthasone
Dioxyde de titane
Nanoparticules
Pulvérisation cathodique
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, we describe a new technique for creating dense, stable, nanolayer coatings on solid substrates using ultrasonic nebulization. Nebulization-assisted layer-by-layer assembly (LbL) is a modification to the well-characterized LbL assembly method. The conventional method of producing electrostatically assembled multilayer films through sequential substrate dipping was compared to the nebulization method, and the resultant film characteristics were investigated. Varied coatings can be generated according to the alterations in deposition parameters, with the most influential being nebulizer distance and time. In addition to employment of polyelectrolytes (PEs), the nebulization method has been extrapolated to generate assemblies containing nanoparticles and a model drug, dexamethasone. It is shown that in comparison with conventional LbL, similar bilayers’ layering thicknesses can be achieved within a much smaller timeframe. Furthermore, PEs and more complex protein and nanoparticle assemblies can be incorporated to influence the surface topography and functionality. The potential to expeditiously assemble multicomponent films has far-reaching implications in many focus areas. Note de contenu : - MATERIALS AND METHODS : Preparation of PE, nanoparticle, protein, and drug solutions - Fabrication of multilayered substrates - Materials characterization.
- RESULTS AND DISCUSSION : LbL netulized thin films functionalized with TiO2 and DEX (surface charge monitoring by ζ-potential - QCM studies - AFM study of film assembly.DOI : 10.1007/s11998-010-9304-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9304-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11429
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 2 (03/2011) . - p. 275-281[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012999 - Périodique Bibliothèque principale Documentaires Disponible Uniform color coating of multilayered TiO2/Al2O3 films by atomic layer deposition / Woo-Hee Kim in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
[article]
Titre : Uniform color coating of multilayered TiO2/Al2O3 films by atomic layer deposition Type de document : texte imprimé Auteurs : Woo-Hee Kim, Auteur ; Hyungjun Kim, Auteur ; Han-Bo-Ram Lee, Auteur Année de publication : 2017 Article en page(s) : p. 177-183 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine
Couleur
Dépôt de couches minces atomiques
Dioxyde de titane
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : Thin film optics, based on light interference characteristics, are attracting increasing interest because of their ability to enable a functional color coating for various applications in optical, electronic, and solar industries. Here, we report on the dependence of coloring characteristics on single-layer TiO2 thicknesses and alternating TiO2/Al2O3 multilayer structures prepared by atomic layer deposition (ALD) at a low growth temperature. The ALD TiO2 and Al2O3 thin films were studied at a low growth temperature of 80°C. Then, the coloring features in the single-layer TiO2 and alternating TiO2/Al2O3 multilayers using both the ALD processes were experimentally examined on a TiN/cut stainless steel sheet. The Essential Macleod software was used to estimate and compare the color coating results. The simulation results revealed that five different colors of the single TiO2 layers were shown experimentally, depending on the film thickness. For the purpose of highly uniform pink color coating, the film structures of TiO2/Al2O3 multilayers were designed in advance. It was experimentally demonstrated that the evaluated colors corresponded well with the simulated color spectrum results, exhibiting a uniform pink color with wide incident angles ranging from 0° to 75°. This article advances practical applications requiring highly uniform color coatings of surfaces in a variety of optical coating areas with complex topographical structures. DOI : 10.1007/s11998-016-9840-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9840-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27799
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 177-183[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18674 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Using beer's law to model : Percent transmittance of multilayer composite coatings Type de document : texte imprimé Auteurs : Don Campbell, Auteur ; Antonette Saint-Pierre, Auteur Année de publication : 2010 Article en page(s) : p. 32-36 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements
Lumière -- Absorption
Photostabilité
Primaire (revêtement)
Revêtements -- Finition
Revêtements multicouches
TransmittanceLa transmittance, en général, est le rapport caractérisant la transmission d'une grandeur dans un système. Elle se calcule par le rapport entre la grandeur en entrée et en sortie.
En optique, la transmittance d'un matériau ou d'un filtre est la fraction du flux lumineux le traversant. Elle est également nommée facteur de transmission mais aussi transparence dans le domaine de la photographie.Index. décimale : 667.9 Revêtements et enduits Résumé : Transmission of light through automotive topcoat and primer layers can lead to degradation of the underlying electrocoat layer and to topcoat delamination. To protect against this, it is critical that transmission of both ultraviolet wavelengths and certain visible wavelengths be effectively blocked by the topcoat and primer layers. The clearcoat, basecoat, and primer each have their own role and combine to protect against light transmission. The transmittance of these combined layers is typically measured by the Integrating Sphere UV-Visible Spectrophotometer. It would both simplify measurement of the topcoat systems and allow better system modeling if these layers could be measured separately and combined using Beer's Law to obtain the transmittance of the total topcoat system. Although some automotive pigments function by reflecting or scattering, we demonstrate here that log-linear models similar to Beer's Law for absorption can still be used to combine these layers and interpolate the effect of individual layer thickness on the total topcoat transmittance. En ligne : https://drive.google.com/file/d/1iQpcBcwSpPc1qLR_Q52vfyoc7zkABMwi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40645
in COATINGS TECH > Vol. 7, N° 6 (06/2010) . - p. 32-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012300 - Périodique Bibliothèque principale Documentaires Disponible Visualization analysis of a multilayer foam development process in microcellular injection molding / T. Yamada in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 3 (07/2012)
[article]
Titre : Visualization analysis of a multilayer foam development process in microcellular injection molding Type de document : texte imprimé Auteurs : T. Yamada, Auteur ; Y. Murata, Auteur ; H. Yokoi, Auteur Année de publication : 2012 Article en page(s) : p. 299-309 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Construction sandwich
Matières plastiques -- Moulage par injection microcellulaire
Mousses plastiques
Polystyrène
Revêtements multicouchesIndex. décimale : 668.4 Plastiques, vinyles Résumé : In this study, cross-sectional analyses were performed on microcellular injection-molded high-impact polystyrene products. The results confirm that the following five types of layers were formed: Skin layers I (the silver streak layer) and II (a nonfoamed layer), Core layers I (cell diameter, d > 150 µm), II (d < 50 µm), and III (d > 100 µm). As the maximum in-mold pressure (Pmax) was increased from 5 to 30 MPa, the thickness of Skin layer II remained nearly constant. However, the foam types in the core layers changed from I and II to II and III or III only, resulting in an increase in cell diameter and a decrease in cell density. The process of cellular structure formation was observed using a glass-inserted mold, which revealed that this process consists of a flow (with a burst of cells at the melt front and the subsequent flow of the melt containing the cells), an end of the filling (involving elastic compression or the dissolution and disappearance of cells formed in the flow stage), and a cooling (new cell generation and growth and cooling solidification). Based on these cross-sectional observations, in concert with meltpressure measurements and visualizations, we developed a model describing the formation process of Skin layer II and the core layers including a new concept that considers the melt pressure inside the cavity. The following layers are incorporated into the model: Skin layer II: A nonfoamed layer is formed in the area of the melt front where gases diffuse out from within the melt during the filling stage, and this nonfoamed layer moves to from melt front to the surface of the product due to fountain flow. Core layers I and II: A multilayer is formed containing a distribution of cells preserved from the flow stage due to the low compression forces, Core layer III: cells are dissolved in the melt due to strong compression forces at the end of the filling stage and then reform and grow in the cooling stage. DOI : 10.3139/217.2443 En ligne : https://drive.google.com/file/d/1dVnoo3jHmY1a6xZXcNmshaz-sdzkH-C-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15575
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 3 (07/2012) . - p. 299-309[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13995 - Périodique Bibliothèque principale Documentaires Disponible Wood surfaces protected with transparent multilayer UV-cured coatings reinforced with nanosilica and nanoclay. Part I : morphological study and effect of relative humidity on adhesion strength / William Nguegang Nkeuwa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)
[article]
Titre : Wood surfaces protected with transparent multilayer UV-cured coatings reinforced with nanosilica and nanoclay. Part I : morphological study and effect of relative humidity on adhesion strength Type de document : texte imprimé Auteurs : William Nguegang Nkeuwa, Auteur ; Bernard Riedl, Auteur ; Véronic Landry, Auteur Année de publication : 2014 Article en page(s) : p. 283-301 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Argile
Bois -- Revêtements protecteurs
Nanoparticules
Revêtements -- Effets de l'humidité
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements multicouches
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.Index. décimale : 667.9 Revêtements et enduits Résumé : Multilayer coatings that are used to protect surfaces of wood components constituting ready to assemble furniture must have good adhesion to the substrate, particularly for wood furniture used in high humidity environments like bathrooms. It is not known whether adding nanoparticles to such coatings will change their properties. Surfaces of yellow birch wood (Betula alleghaniensis Britton) were protected with six different types of multilayer coatings (MCs). Prepared primer and topcoat UV-curable formulations constituting these MCs contained, respectively, hydrophobic-fumed silica (NS) and nanoclays (NC). They were added at 0 and 0.5 wt% for NS and at 0, 1, and 3 wt% for NC. The viscosity behavior of these formulations was evaluated as a function of shear rate. The morphology of the cross-section of coated wood samples was qualitatively studied by means of both scanning and transmission electron microscopy (SEM and TEM analysis). The adhesion strength of these MCs on wood surfaces was assessed as a function of relative humidity (RH). TEM images have revealed that topcoats reinforced with NC appear to have an intercalated (micro and nanoparticles) morphology. Statistical results have shown that NS and NS × NC do not significantly confer additional adhesion strength of MCs on wood surfaces, whereas the effect of NC is significant. The adhesion strength of coated wood samples conditioned at 80% RH was higher than that obtained on those conditioned at 40% RH. Multilayer coating # 5 ([0.5 wt% NS—1 wt% NC] combination) has been chosen as the ideal protection system for two reasons: (i) high adhesion strength at low RH and (ii) good barrier properties. Note de contenu : - EXPERIMENTAL : Materials - UV-curable formulations : preparation and viscosity measurement - Statistical design - Wood surface preparation - Formulations application and UV-curing process - Preparation and conditioning of coated wood samples - Characterization - statistical analysis
- RESULTS AND DISCUSSION : Viscosity behavior of UV-curable formulations - Morphology of the cross-section of multilayer coatings on wood surfaces - Adhesion strength of multilayer coatings on wood surfaces
DOI : 10.1007/s11998-013-9551-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9551-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21448
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 3 (05/2014) . - p. 283-301[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16292 - Périodique Bibliothèque principale Documentaires Disponible Wood surfaces protected with transparent multilayer UV-cured coatings reinforced with nanosilica and nanoclay. Part II : Application of a standardized test method to study the effect of relative humidity on scratch resistance / William Nguegang Nkeuwa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
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