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JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH . Vol. 14, N° 5Mention de date : 09/2017Paru le : 09/10/2017 |
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Ajouter le résultat dans votre panierA method to model web trajectory and release in forward roll coating / Harrison Gates in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : A method to model web trajectory and release in forward roll coating Type de document : texte imprimé Auteurs : Harrison Gates, Auteur ; Douglas W. Bousfield, Auteur Année de publication : 2017 Article en page(s) : p. 957-964 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Enduction au rouleau
Lubrification
Modèles mathématiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The trajectory of the web at the exit of a roll coating operation can influence the quality of the final coating. While methods to model the web trajectory have been given in the literature, these methods are limited in various ways. A method is proposed to describe the web trajectory and the pressure distribution in the fluid at the exit of a forward roll coater. The Reynolds lubrication equations for the fluid are coupled with the web by a force balance on web node points. The fluid pressure in the coating layer generates forces on the web. These forces deflect the web. Integration in time gives the web dynamics. The angle that the web is pulled from the nip and the tension are found to influence the pressure pulse in the divergent section of the nip to a large extent. Low tensions lead to a second pressure pulse followed by a sub-ambient or tack pressure. Pulling the web at various angles from the nip can cause the tack pressure to increase or decrease. Pressure pulses are predicted that are comparable to measurements by a laboratory device. Note de contenu : - Fig. 1. Configuration at the exit of a forward roll coating nip. The web can deform before the coating layer splits. a is the takeoff angle of the web, and xp is the distance away from the nip that this point is applied. The center of the nip is taken as x = 0
- Fig. 2. Experimental device to measure the influence of a web on the nip dynamics. The rubber-covered roll is to the left of the steel roll on the right. In normal operation, the rubber-covered roll would be in contact with the steel roll and rotates in the clockwise direction
- Fig. 3. Dimensionless pressure distribution predicted when the web is pulled straight from the nip for various tensions for h*i = 0:01 and x*p = 2.0. On the right, the case for T* = 10 by itself for clarity
- Fig. 4. Web trajectories for various tensions when the web is pulled straight from the nip for various tensions and x*p = 2. Note that the y-axis is enlarged compared to the x axis
- Fig. 5. Dimensionless pressure distribution for even lower web tensions for the same conditions as in Fig. 2
- Fig. 6. Results for positive (downward) takeoff angle of 20°, with the take-up point being x*p = 2.0 for h* i = 0.01. Pressure profiles are shown on the left. Web trajectories on the right. Note that at T* = 100, the web follows the top roll surface some distance
- Fig. 7. Same as Fig. 5, but for a negative angle of 20°, with the web being pulled upward from the nip. Left side is the pressure distribution, and the right side is the web trajectories
- Fig. 8. Measured pressure distribution in a laboratory device that had a tensioned webDOI : 10.1007/s11998-017-9938-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9938-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29124
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Two-step migration of particles in evaporating bimodal suspension films at high Peclet numbers / Tomonori Tashima in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Two-step migration of particles in evaporating bimodal suspension films at high Peclet numbers Type de document : texte imprimé Auteurs : Tomonori Tashima, Auteur ; Masato Yamamura, Auteur Année de publication : 2017 Article en page(s) : p. 965-970 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Latex
Particules (matières)
Photoluminescence
Produits chimiques -- Migration
Revêtements -- Séchage -- Défauts:Peinture -- Séchage -- DéfautsIndex. décimale : 667.9 Revêtements et enduits Résumé : During the drying of bimodal colloidal suspensions containing particles of various sizes, smaller particles preferentially migrate to the top surface under particular drying conditions, leading to undesirable drying defects in batteries and in other coating applications. Despite extensive previous studies, the migration mechanism is far from being understood because few in situ observations are available to support the hypotheses. To remedy this, we use real-time photoluminescence (PL) microscopy to investigate the migration of small fluorescent latex particles co-dispersing with large nonemissive latex particles. Comparing the measured PL intensity with that predicted by a model allows us to determine the quantity of small particles near the evaporating surface. The results reveal that the fluorescent particles segregate in two steps: The primary segregation occurs early in the evaporation stage, whereas the secondary stepwise migration occurs when the air–liquid interface invades the particle consolidation layer. The latter migration is attributed to the flow-induced motion of small particles that move through interstitial spaces between large particles. DOI : 10.1007/s11998-017-9946-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9946-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29125
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Substrate temperature-dependent physical properties of nanocrystalline zirconium titanate thin films / Jhansi Rani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Substrate temperature-dependent physical properties of nanocrystalline zirconium titanate thin films Type de document : texte imprimé Auteurs : Jhansi Rani, Auteur ; A. Guru Sampath Kumar, Auteur ; T. Subba Rao, Auteur Année de publication : 2017 Article en page(s) : p. 971-980 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces
Revêtement métallique
Revêtements -- Propriétés physiques
Titanate de zirconiumIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanocrystalline zirconium titanate thin films were deposited by direct current magnetron reactive sputtering on to glass substrates at room temperature and at different substrate temperatures of 423, 473, 523, and 573 K under high vacuum conditions. The deposited films have been characterized to study the physical properties of the films as a function of substrate temperature. Though the film exhibited amorphous characteristics at room temperature the higher temperatures resulted in the evolution of crystallites in the films. The crystallinity increased with temperature from 423 K onwards and the film deposited at 523 K exhibited a high crystallite size of 22 nm. The SEM images of the films revealed the improvement in the crystallinity from 423 to 523 K with dense columnar structure normal to the substrate. Further higher treatment deteriorated the film properties. The films showed a good transmittance of above 80%. A high optical transmittance of 91% and a high packing density of 96% have been observed for the film deposited at 523 K. The thickness of the films remained consistent at ~230 nm (±6 nm). It is noticed that an increase in the substrate temperature enhanced the structural, optical, and electrical properties of the films up to 523 K. Note de contenu : - Structural properties
- Surface morphological properties
- Elemental composition of the films
- Optical properties
- Electrical resistivityDOI : 10.1007/s11998-017-9951-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9951-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29126
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Transient response of slot coating flows of shear-thinning fluids to periodic disturbances / Semi Lee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Transient response of slot coating flows of shear-thinning fluids to periodic disturbances Type de document : texte imprimé Auteurs : Semi Lee, Auteur ; Jaewook Nam, Auteur Année de publication : 2017 Article en page(s) : p. 981-990 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cisaillement (mécanique)
Enduction par filière
Fluide de CarreauLe fluide de carreau est un type de fluide newtonien généralisé où la viscosité, dépend du taux de cisaillement.
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Slot coating is a popular coating method, in which the film thickness is precisely controlled by adjusting the flow rate and production speed. When the coating flow undergoes small-scale disturbances generated by rotating elements such as motors, pumps, or uneven rolls, the downstream meniscus fluctuates, which causes film thickness variation in the flow direction. Although most coating liquids including polymeric and particulate solutions exhibit a shear-thinning rheological property, their effect on transient coating flow behaviors is not deeply understood. Here, the effect of shear-thinning property on film thickness variation under different disturbances is investigated using a computer-aided analysis of transient slot coating flow. In this study, the Carreau model is used to describe the shear-thinning property, and four different disturbances are considered. Note de contenu : - Governing equations and boundary conditions
- Material properties and operating conditions
- Results and discussion : Disturbance strongly sensitive to the shear-thinning property : the coating gap - Disturbance weakly sensitive to the shear-thinning property
- Final remarks
- Appendix : Development of the parabolic velocity profile for carreau fluids - Dependence of film thickness variation on the upstream bead size under vacuum disturbanceDOI : 10.1007/s11998-017-9952-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9952-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29127
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Investigation of interfacial instabilities with a two-layer slide coating process / Cornelia K. Buerkin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Investigation of interfacial instabilities with a two-layer slide coating process Type de document : texte imprimé Auteurs : Cornelia K. Buerkin, Auteur ; Ike de Vries, Auteur ; Sebastian M. Raupp, Auteur ; Philip Scharfer, Auteur ; Wilhelm Schabel, Auteur ; Pim Groen, Auteur Année de publication : 2017 Article en page(s) : p. 991-1001 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cyclopentanone
DiméthylbenzèneLe xylène ou diméthylbenzène est un groupe d'hydrocarbures aromatiques dérivés méthylés du benzène. Il est représenté par trois isomères structuraux : 1,2-diméthylbenzène, 1,3-diméthylbenzène et 1,4-diméthylbenzène (appelés respectivement ortho-diméthylbenzène, méta-diméthylbenzène et para-diméthylbenzène). Le xylène technique est un mélange des trois isomères, de composition voisine de méta- (60 %), ortho- (10-25 %) et para- (10-25 %). Tout comme pour le benzène, la structure du xylène est plane. C'est un composé aromatique, et les électrons formant les liaisons π du cycle sont délocalisés, ce qui entraîne une stabilité importante de la structure.
PROPRIETES PHYSICO-CHIMIQUES : Le xylène est un liquide incolore, d'odeur agréable et très inflammable. Il est naturellement présent dans le pétrole et le goudron de houille, et se forme durant les feux de forêts. Les propriétés chimiques diffèrent peu d'un isomère à l'autre. La température de fusion est comprise entre -47,87 °C (m-Xylène) et 13,26 °C (p-Xylène). La température d'ébullition est voisine de 140 °C pour tous les isomères. La densité est de 0,87 (le composé est plus léger que l'eau). L'odeur du xylène devient détectable pour des concentrations de l'ordre de 0,08 à 3,7 ppm, et le goût est apparent dans l'eau pour des concentrations de l'ordre de 0,53 à 1,8 ppm.
PRODUCTION ET UTILISATION : Le xylène est produit à partir du pétrole dans l'industrie pétrochimique. En termes de volume, c'est l'un des 30 composés chimiques les plus produits aux USA (environ 450 000 tonnes par an). Il est utilisé comme solvant, notamment en tant que céruménolytique. Il est aussi utilisé par les industries de l'impression, du caoutchouc et du cuir. Il est employé comme réactif de départ pour la production d'acide téréphtalique, utilisé comme monomère pour la production de polymères de type téréphtalate. Le xylène est également utilisé pour le nettoyage, comme pesticide, utilisé aussi en parasitologie dans la méthode de KOHN pour vérifier la bonne déshydratation de frottis de selle, comme diluant pour la peinture ainsi que dans la peinture et les vernis. Il est présent en faibles quantités dans les carburants pour l'aviation ainsi que dans l'essence (voir l'article « Pouvoir calorifique »). En présence de réactifs oxydants, comme le permanganate de potassium KMnO4, le groupement méthyle peut être oxydé jusqu'à former un acide carboxylique. Lorsque les deux groupements méthyle sont oxydés, le o-xylène forme l'acide phtalique et le p-xylène l'acide téréphtalique.
Electronique -- Matériaux
Ethylène glycol
Polyglycol monoéthyl éther acétate
Propylène glycol
Revêtements multicouches
Revêtements organiques
Slide coating
Tension superficielleIndex. décimale : 667.9 Revêtements et enduits Résumé : Organic electronics have been thoroughly investigated due to their broad application potential, ranging from light-emitting diodes to photovoltaics. The processing of organic electronics is trending from vacuum toward wet chemical deposition, which allows fast low-cost mass production of devices with scalable dimension. One of the current challenges of wet film processing is the redissolution of already dried active materials when applying a liquid top layer. Further, increasing overall process efficiency by coating multiple liquid layers in one step raises such challenges as liquid–liquid mixing or dewetting. This article describes the experimental investigation of these instabilities for two-layer flows with organic solvents. A modified slide coating device was chosen where an extended plate after the slot exit allows prolonged observation of the flow while it travels down the plate. During experimentation, stable and unstable two-layer flows as well as different types of instabilities were detected. The key finding is a correlation of flow stability with the spreading coefficient, a combined measure of surface and interfacial tensions. Focusing on fluid properties, this paper succeeds in defining a three-dimensional stability window for a dual-layer flow. Note de contenu : - Theoretical background : flow down an inclinded plane
- Experimental design, setup and solvent selection
- Experimental results : influence of surface and interfacial tension
- Experimental results : influence of viscosity
- Experimental results : miscible fluids with similar viscositiesDOI : 10.1007/s11998-017-9961-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9961-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29128
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Trailing edge formation during slot coating of rectangular patches / D. Maza in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
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Titre : Trailing edge formation during slot coating of rectangular patches Type de document : texte imprimé Auteurs : D. Maza, Auteur ; M. S. Carvalho, Auteur Année de publication : 2017 Article en page(s) : p. 1003-1013 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eléments finis, Méthode des
Enduction par filière
Ligne de contact (chimie physique)(Chimie physique) Ligne correspondant à l’intersection apparente de deux interfaces contigües.
Médicaments -- Administration par timbres
Modèles mathématiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Different products, such as adhesives, pharmaceutical patches, batteries, and fuel cell membranes, require coating discrete patches onto moving substrates. For coating rectangular patches, intermittent slot die coating is the preferred method. The patches can be obtained by rapidly starting and stopping the flow out of the coating die. Controlling the flow start-up and shutdown to produce sharp and uniform leading and trailing edges of each patch is challenging. Different ways to control the liquid feeding are used to optimize the process. Even if the start-up and shutdown of the feeding system are well designed, the transient flow in the coating bead contributes to the formation of nonuniform leading and trailing edges of coated patches. In this work, we analyze how the operating conditions, die geometry, and liquid properties affect the coating bead breakup process and the trailing edge configuration. The process is directly related to the contact line dynamics. The results show that the uniformity of the trailing edge of each coated patch can be improved by changing the die shoulder angle and wetting characteristics of the die surface. DOI : 10.1007/s11998-017-9962-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9962-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29136
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Numerical investigation of multiple-slot jets in air-knife wiping / A. Yahyaee Soufiani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Numerical investigation of multiple-slot jets in air-knife wiping Type de document : texte imprimé Auteurs : A. Yahyaee Soufiani, Auteur ; J. R. McDermid, Auteur ; Andrew N. Hrymak, Auteur ; F. E. Goodwin, Auteur Année de publication : 2017 Article en page(s) : p. 1015-1025 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Enduction par filière
Galvanisation
Lame d'enduction
Matériaux -- Epaisseur
Métaux -- Revêtements protecteurs
Revêtement métallique
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Gas-jet wiping using an air knife is an effective hydrodynamic method to control the coating thickness of zinc on a moving steel substrate in the continuous hot-dip galvanizing process. The current generation of single-slot air knives is widely used in the galvanizing industry but has limitations in producing low coating weights at the higher line speeds desired for the current generation of automotive sheet steel products. In this work, a novel configuration of a multiple-slot jet (multijet) air knife is investigated through numerical simulations as an alternative to the traditional single-slot air knife. The aim of this study is to investigate the sensitivity of the coating weight to the pressure and shear stress profiles in order to determine whether there are operating regions that are more robust to air-knife geometry changes. A modified geometry for the multislot air knife is proposed based on computational fluid dynamics results obtained from a parametric study. The effects of different operating conditions such as the main jet Reynolds number (Rem), auxiliary jet Reynolds number (Rea), and jet-to-wall distances (Z/D) on the final coating thickness were investigated. The results of the modeling showed that by setting the auxiliary jet Reynolds number at a fraction (25%) of the main jet Reynolds number, lighter coating weights can be achieved for higher strip velocities and higher wall-to-jet distances as compared to the single-slot jet design. It is believed that this geometry will provide a robust operating window to enable the prototype design to be employed in the industrial setting. Note de contenu : - Analytical model of film thickness
- Numerical modeling
- Boundary conditions and grid generation
- Validation
- Results and discussion : Effect of Da - Effect of auxiliary jet tilt angle (h) - Effect of a - Effect of s - Effect of jet-to-wall distance - Effect of main jet Reynolds number - Effect of auxiliary jet Reynolds number effectDOI : 10.1007/s11998-017-9963-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9963-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29137
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Slot die-coated blue SMOLED multilayers / Sebastian M. Raupp in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Slot die-coated blue SMOLED multilayers Type de document : texte imprimé Auteurs : Sebastian M. Raupp, Auteur ; Lisa Merklein, Auteur ; Sebastian Hietzschold, Auteur ; Martin Zürn, Auteur ; Philip Scharfer, Auteur ; Wilhelm Schabel, Auteur Année de publication : 2017 Article en page(s) : p. 1029-1037 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diodes électroluminescentes
Electronique -- Matériaux
Enduction
Microscopie à force atomique
Morphologie (matériaux)
Poly(3,4-éthylènedioxythiophène)
Polystyrène sulfone
Revêtement -- Séchage
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : The key challenge in solution-processing efficient OLEDs is to realize the multilayer device architecture. We demonstrate that slot die coating is applicable to deposit small-molecule (SM) layers on top of each other without dissolving the underlying layer. A stack for a blue SMOLED is chosen comprising slot die-coated PEDOT:PSS, an SM emissive layer (EML) as well as an SM electron transport layer (ETL). The devices are fabricated in a sheet-to-sheet coating process with a slot die table coater under ambient conditions. While keeping the processing parameters constant for PEDOT:PSS and the EML, the composition of the ETL is varied. The choice of solvent for coating the ETL is crucial regarding wetting and dissolution of the underlying layer, solubility, surface roughness, and device efficiencies. Average roughness values down to 0.38 nm and peak to valley values around 10 nm were measured. Comparing device efficiencies of devices with and without ETL, an increase in efficiency with a factor up to 42 was achieved. In total, we show 135 blue SMOLEDs to demonstrate reproducibility. DOI : 10.1007/s11998-017-9964-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9964-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29138
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Process-dependent conductivity and film homogeneity of slot-die-coated PEDOT:PSS–PVA composite films / Anna-Lena Riegel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Process-dependent conductivity and film homogeneity of slot-die-coated PEDOT:PSS–PVA composite films Type de document : texte imprimé Auteurs : Anna-Lena Riegel, Auteur ; Nora Reichelt, Auteur ; Philip Scharfer, Auteur ; Wilhelm Schabel, Auteur Année de publication : 2017 Article en page(s) : p. 1039-1051 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcool polyvinylique
Composites
Conducteurs organiques
Conduction électrique
Couches minces
Enduction par filière
Poly(3,4-éthylènedioxythiophène)
Polystyrène sulfoneIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, we investigate the impact of process parameters on homogeneity and electrical conductivity of slot-die-coated PEDOT:PSS–PVA composite films that are doped with DMSO. Due to a strong correlation between conductivity and morphology of PEDOT:PSS films and the latter’s dependency on the processing step itself, we apply slot die coating for maximized process control and systematically evaluate the impact of coating gap, speed, and film thickness. Since the entire coating and drying process is run in batch mode, the setup is optimized regarding steady-state conditions and high homogeneity of the films. Overall, for the films manufactured in batch mode, we obtain a reproducibility film thickness of 99% and a low deviation from the set film thickness (below 8%). In order to analyze the impact of the coating parameters, stable operating points derived from the viscocapillary model are chosen and either the dimensionless gap or the capillary number is varied. Coating gap and film thickness emerged as dominating parameters, leading to an increase in conductivity of 40% and 70%, respectively, or, when changing both simultaneously, of 157%. Only a minor impact of shear forces (increase of 10%) was found. Note de contenu : - MATERIALS AND EXPERIMENTAL METHODS : Materials - Coating ink : composition and preparation - Coating and drying process - Experimental approach : coating window and operating points - Film analysis : conductivity and film thickness
- HOMOGENEITY OF COATINGS : IMPACT OF BATCH PROCESSING
- ELECTRIC CONDUCTIVITY OF COATINGS : INFLUENCE OF COATING PARAMETERS : Dependency of conductivity on dimensionless gap - Dependency of conductivity on capillary numberDOI : 10.1007/s11998-017-9981-Y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9981-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29139
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Numerical analysis for predicting the operability window of slot-die coating onto porous media / Tomomi Goda in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Numerical analysis for predicting the operability window of slot-die coating onto porous media Type de document : texte imprimé Auteurs : Tomomi Goda, Auteur ; Yuichi Sasaki, Auteur ; Mamoru Mizuno, Auteur ; Kazuhiko Morizawa, Auteur ; Hitoshi Hatakura, Auteur ; Shigetaka Tomiya, Auteur Année de publication : 2017 Article en page(s) : p. 1053-1060 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse numérique
Enduction par filière
Matériaux poreux
Pénétration (physique)
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : The ability to coat porous media is critical for forming composite functional thin films. A major technical concern for accurately predicting this process is that the flow of the coating bead and the penetration process must be considered. These phenomena strongly influence each other. Therefore, both the flow into porous media and the coating-bead flow should be simultaneously treated. In this study, the target is a high-productivity coating system based on a roll-to-roll process using a slot die. Slot-die coating is a premetered, precision coating method. We investigated the coating of porous media to estimate the practical operability window and the penetration depth using two-dimensional numerical analysis. For this purpose, both the coating-bead pressure and the capillary pressure were considered as driving forces of penetration. Moreover, the curvature of the backup roll opposite the slot die was also taken into account to achieve an accurate estimation. We demonstrate that the penetration depth and operability window for defect-free coatings can be well estimated and that the results are consistent with experimental results. Note de contenu : Fig. 1. (a) Scheme of the experimental setup. (b) Scheme of the setup for slot-die coating onto porous media
Fig. 2. The calculated region and the boundary conditions
Fig. 3. Mesh information near the coating gap
Fig. 4. Effect of penetration and coating speed on the operability window and a plot of the coating gap vs. the coating-bead length ; (a), (b), and (c) show each state of the coating bead when the flow is steady
Fig. 5. Effect of penetration and coating speed on the operability window, plotted as the coating gap vs. the coating speed (a) on nonporous media and (b) on porous media. Defect-free cases are plotted as ‘‘s’’ and coating-defect cases are plotted as "3."
Fig. 6. Effect of the coating speed on the penetration depth. * Bead breakup occurred. ** When the coating speed was 5 m/min, the penetration depth reached the bottom of the porous medium
Fig. 7. Effect of coating speed on the coating-bead flow rate at different coating gaps
Fig. 8. Pressure distribution through the coating bead in a 31-lm gap. (a) Coating speed U = 20 m/min. (b) Coating speed U = 5 m/min
Fig. 9. Pressure distribution (a) through the coating bead and (b) of the penetration force in (1) 38-lm and (2) 31-lm gaps. (a-1) Coating gap H = 38 lm. (a-2) Coating gap H = 31 lm. (b-1) Coating gap H = 38 lm. (b-2) Coating gap H = 31 lm
Table 1 : Processing parameters and material properties for the coating experiments
Table 2 : Ranges of the dimensionless Reynolds, capillary, and Stokes numbers
Table 3 : Experimental conditions and results for the defect-free and bead breakup casesDOI : 10.1007/s11998-017-9985-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9985-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29140
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Plant leaves icephobicity / Elabeh Alizadeh-Birjandi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Plant leaves icephobicity Type de document : texte imprimé Auteurs : Elabeh Alizadeh-Birjandi, Auteur ; H. Pirouz Kavehpour, Auteur Année de publication : 2017 Article en page(s) : p. 1061-1067 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie biomimétique
Hydrophobie
Revêtements antigelIndex. décimale : 667.9 Revêtements et enduits Résumé : Ice adhesion and accumulation are well known to cause serious problems for different structures such as wind turbines, power transmission and distribution systems, and aircraft. Development of coatings that can resist icing can solve many challenges in various areas of industry. This work was inspired by nature and ice resistivity and superhydrophobicity of plants leaves. Kale is a winter plant with superhydrophobic behaviors, which is normally known as an advantage for cleaning the leaves; however, this article reveals that kale leaves have special surface microstructures delaying the ice formation initiation making them good candidates for designing ice-repellent coatings. In-depth experimental analyses, IR thermography, contact angle measurements, and scanning electron microscopy of the leaves were performed to discover how different plants can prevent icing and further find an optimal design for an artificial ice-repellent coating. Note de contenu : Fig. 1. Optical images of the freezing experiments on lettuce and kale leaves. Images are processed to measure the contact angle of a water droplet on the plants leaves. The average static contact angles of water droplet on the (a) lettuce and (b) kale leaves at 210°C are 74.28° and 147.16°, respectively
Fig. 2. Growth of freezing front for a droplet on kale and lettuce leaves vs time. For a droplet on the kale leaf with higher contact angle, the growth of freezing front is gradual Compared to the lettuce leaf
Fig. 3. The video frames of the freezing process of the water droplet at room temperature on the lettuce and kale leaves at 210°C
Fig. 4. The IR camera images of the heat transfer process for a droplet on the kale and lettuce leaves. The plot at the Bottom shows the time rate of change of nondimensional temperature of the droplet on both leaves. Here, T0 and Ti refer to temperature of the substrate (20°C) and initial temperature of the drop (70°C), respectively
Fig. 5. The SEM images of the surface and shaft of the lettuce and kale leaves. The microstructure on the surface of the leaves seems to be different, while the shafts have the similar patterns
Fig. 6. Schematic of the experimental setup on a drop shape analyzer (KRÜSS, DSA 100) equipped with a temperature-
controlled environmental chamber and a Peltier plate to set and monitor the temperatureDOI : 10.1007/s11998-017-9988-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9988-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29141
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible High-performance waterborne UV-curable polyurethane dispersion based on thiol–acrylate/thiol–epoxy hybrid networks / Vikash Mishra in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : High-performance waterborne UV-curable polyurethane dispersion based on thiol–acrylate/thiol–epoxy hybrid networks Type de document : texte imprimé Auteurs : Vikash Mishra, Auteur ; Jatin Desai, Auteur ; Kalpesh I. Patel, Auteur Année de publication : 2017 Article en page(s) : p. 1069-1081 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes
Polyacrylates
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet
ThiolsIndex. décimale : 667.9 Revêtements et enduits Résumé : Synthesis, characterization, and film performance of waterborne thiol–acrylate/thiol–epoxy hybrid coatings are highlighted in this article. A dimer acid-modified epoxy (DME) polyol, containing both hydroxyl and epoxy functional groups, was prepared by reacting epoxy resin (EEW = 190 g/equi) with dimer fatty acid at 2:1 molar ratio. Further, a base UV-curable polyurethane acrylate dispersion (UV-PUD), with a pendant epoxy functional group, was prepared by reacting polyol (DME), isophorone diisocyanate, and dimethylol propionic acid and end-capped with hydroxyethyl methacrylate with subsequent dispersion in water. Prepared intermediates were characterized for the parameters relevant to the study by physical, spectroscopic, and chemical methods. UV-curable thiol–acrylate/thiol–epoxy hybrid coatings were prepared by blending UV-PUD with trimethylolpropane tris(3-mercaptopropionate) (TMPMP) at four different thiol ratios (0, 0.3, 0.6, and 1.0) with respect to acrylate/epoxy groups. Cured films of the hybrid coating were identified by FTIR spectroscopy. The impact of thiol ratio on film performance was evaluated in terms of mechanical, chemical, thermal, and coating properties. The gel content measurements confirm that the addition of TMPMP increased the double bond conversion along with the epoxy group. Evaluation of cured samples shows the significant improvement in storage modulus, glass transition temperature, tensile strength, and hardness with increase in thiol ratio. The cured films possessed excellent water and acid resistance (<4%) even after 28 days of immersion. Moreover, the notable improvement was alkali resistance of cured films, i.e., as thiol ratio was increased from 0 to 1, weight loss in alkaline environment deceased from 49.5 to 4.5% after 28 days. Better properties of the thiol–acrylate/thiol–epoxy hybrid films will allow it as a potential application in low-volatile high-performance coatings. Note de contenu : - EXPERIMENTAL : Materials - Preparation of dimer-modified epoxy polyol (DME) - Synthesis of hybrid UV-curable polyurethane dispersion (UV-PUD) - Preparation of hybrid UV-curable coatings and their cured films - Measurements
- RESULTS AND DISCUSSION : Physicochemical characterization of DME and UV-PUD - FTIR analysis of intermediates and cured film - Dynamic mechanical properties of thiol-acrylate/thiol-epoxy hybrid networks - Mechanical properties of the hybrid systems - Thermal stability of cured films - Gel fraction - Chemical, water, and solvent resistance - Coating performance propertiesDOI : 10.1007/s11998-016-9906-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9906-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29142
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Performance enhancement of the anti-corrosion coating based on Ce3+-polyaniline montmorillonite composite/epoxy-ester system / Zhen Hua Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Performance enhancement of the anti-corrosion coating based on Ce3+-polyaniline montmorillonite composite/epoxy-ester system Type de document : texte imprimé Auteurs : Zhen Hua Zhang, Auteur ; Da Quan Zhang, Auteur ; Li Hua Zhu, Auteur ; Li Xin Gao, Auteur ; Tong Lin, Auteur ; W. G. Li, Auteur Année de publication : 2017 Article en page(s) : p. 1083-1093 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone
Anticorrosifs
Anticorrosion
Cerium
Essais de résilience
Montmorillonite
Polyaniline
Revêtements -- DéfautsIndex. décimale : 667.9 Revêtements et enduits Résumé : Herein we report on the Ce3+-5-sulfosalicylic acid dihydrate-doped polyaniline/montmorillonite (Ce3+-PANI/MMT) composite prepared via in situ intercalation polymerization and the cation-exchange method. The as-prepared samples were characterized by the scanning electron microscope, transmission electron microscope, X-ray diffraction analysis, and Fourier transform infrared spectrometer. The release of Ce3+ ions was detected by the immersion test and the solution analysis method. The anti-corrosion performance of the coatings was evaluated by the corrosion test, open-circuit potential analysis, the potentiodynamic polarization curve, and electrochemical impedance spectroscopy in 3.5 wt% NaCl aqueous solution. The results showed that the Ce3+-PANI/MMT composite had better anti-corrosion effects along the coating defects. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PANI, PANI/MMT, and Ce3+-PANI/MMT - Preparation of coatings on steel surfaces - Characterization - Corrosion protection performance
- RESULTS AND DISCUSSION : Electron microscopy studies - Powder X-ray diffraction - FTIR spectra - The release curve of Ce3+ - Corrosion immersion test - Electrochemical measurementsDOI : 10.1007/s11998-016-9897-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9897-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29143
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Biomimetic synthesis of calcium carbonate films on bioinspired polydopamine matrices in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Biomimetic synthesis of calcium carbonate films on bioinspired polydopamine matrices Type de document : texte imprimé Année de publication : 2017 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Calcite Grâce à leurs performances analytiques, on observe un intérêt croissant pour l’utilisation des installations en rayonnement synchrotron et de certains appareils portables employant des sources de rayons X afin d’analyser, de révéler et de conserver les matériaux des objets du patrimoine.
La diffraction des rayons X va ainsi permettre de révéler la complexité de la nature des pigments utilisés par les artistes : c’est par la structure de la matière cristalline que l’on peut comprendre certaines de leurs propriétés optiques et mécaniques ainsi que leurs modes de synthèse.
Caractérisation
Carbonate de calciumLe carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Chimie biomimétique
Couches minces
Hydrophobie
Matériaux bio-inspirés
Minéralisation
PolydopamineIndex. décimale : 667.9 Revêtements et enduits Résumé : We combine the active surface of polydopamine (PDA) with the biomimetic mineralization of CaCO3 to obtain the macroscopically continuous CaCO3 films under mild conditions. In this approach, the organic matrices were adhesive PDA coatings, which were dip-coated on silicon wafers by the self-polymerization of dopamine in an alkaline aqueous solution (pH 8.5). The inorganic layers were CaCO3 films, which were formed in a CaCl2 solution in the presence of poly(acrylic acid) (PAA) via a CO2 diffusion method. During the biomimetic mineralization, amorphous calcium carbonate (ACC) was formed on PDA matrices with the help of PAA, which, subsequently, was transformed into a flat continuous calcite film on the PDA matrices. As the mineralization time increased, a new layer of CaCO3 crystals was formed over the calcite and, as a result, led to continuous CaCO3 films with rough surfaces. The thicknesses of CaCO3 films can be controlled by tuning the mineralization time. Our approach may provide a simple, yet efficient way for the preparation of macroscopically continuous organic–inorganic composite CaCO3 films under mild conditions. Moreover, superhydrophobic surfaces can be successfully achieved via a hydrophobic modification of the rough CaCO3 films, which make them suitable candidates for a variety of superhydrophobic applications, such as self-cleaning surfaces or anticorrosion, antiadhesive coatings. Note de contenu : - Materials
- Fabrication of bioinspired polydopamine matrices
- Preparation of CaCO3 films on polydopamine matrices
- Hydrophobic modification of CaCO3 films
- CharacterizationDOI : 10.1007/s11998-016-9898-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9898-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29144
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Potential for carrying dyes derived from spalting fungi in natural oils / Sara C. Robinson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Potential for carrying dyes derived from spalting fungi in natural oils Type de document : texte imprimé Auteurs : Sara C. Robinson, Auteur ; Sarath Mercedes Vega Gutierrez, Auteur ; Rosa Amelia Cespedes Garcia, Auteur ; Nicole Iroume, Auteur ; Nikole Renee Vorland, Auteur ; Amy McClelland, Auteur ; Megan Huber, Auteur ; Savannah Stanton, Auteur Année de publication : 2017 Article en page(s) : p. 1107-1113 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois
Champignons et constituants
Colorants végétaux
Huiles et graisses végétales
Matériaux -- Coloration
Mélanges (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : Wood colored internally by fungi has long been used by woodcrafters and artisans as a substitute for synthetic dyes. Recent advances in the field of spalted wood have led to methods by which the fungal dyes can be extracted from either a fungal solution or colonized wood and then reapplied to clear wood. This takes the “guess work” out of spalting, as well as the time necessary for fungal colonization; however, it requires organic solvents like dichloromethane, which are toxic and not readily available to consumers. Herein, the authors show that the dyes can be successfully carried and blended together (to increase the range of colors) in a range of natural oils. The blue–green dye of Chlorociboria species, called xylindein, carried best in raw linseed oil, the red dye of Scytalidium cuboideum performed best in Danish oil, although more dye could be carried in raw linseed oil, and the yellow dye of Scytalidium ganodermophthorum performed best in walnut oil. The ability to carry and mix these dyes in easily purchased, nontoxic oils opens up their use to woodworkers who seek to follow the traditions of spalted wood, but do not have the skills or time to work with live fungal cultures or fungal dyes suspended in toxic organic solvents. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Dyes - Submersion in oils - Tests - Analysis
- RESULTS : Carrying capacity - Interactions - Solids - BlendsDOI : 10.1007/s11998-017-9919-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9919-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29145
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Effect of corona discharge on the stability of the adhesion of thin silicone-organic coating to polyamide fiber surface made by the sol–gel method / Dorota kowalczyk in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Effect of corona discharge on the stability of the adhesion of thin silicone-organic coating to polyamide fiber surface made by the sol–gel method Type de document : texte imprimé Auteurs : Dorota kowalczyk, Auteur ; Irena Kaminska, Auteur Année de publication : 2017 Article en page(s) : p. 1115-1125 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Fibres textiles synthétiques
Hydrophobie
Nontissés
Polyamide 6
Sol-gel, Procédé
Traitement corona
Traîtements de surface
VinyltriéthoxysilaneIndex. décimale : 667.9 Revêtements et enduits Résumé : This paper presents the effect of pretreatment of polyamide (PA6) nonwoven with corona discharge on the stability of the adhesion of thin hydrophobic silicone-organic coating based on vinyltriethoxysilane, made by the sol–gel method. This pretreatment with corona discharge causes a change in the physicochemical properties of the PA6 fiber surface. These changes include, among others, an increase in the fiber surface roughness, wettability, and surface free energy. At the same time, XPS and EDS investigations have shown an increase in the degree of oxidation and the formation of functional polar groups on the fiber surface (C–O–, C–OH, and O=C–O–). As a result of the changes in the surface properties of pretreated PA6 fibers, a higher degree of the sol deposition was obtained compared with that for untreated nonwoven surface. The assessment of the stability of the adhesion of thin hydrophobic coating to the fiber surface was carried out on the basis of changes in the content of silica deposited on fibers and the kinetics of water contact angle after washing and abrasion processes. In the end, the PA6 nonwoven, pretreated with corona discharge, shows a higher stability of the adherence of the thin silicone-organic coating and a higher degree of hydrophobicity than the untreated nonwoven. Note de contenu : - EXPERIMENTAL : Materials - Preparation of a hybrid Al2O3/SiO2 sol - Preparation of sol-gel coat
- RESULTS AND DISCUSSION : Nonwoven surface modification - Stability of adhesion of the silicone-organic coatingDOI : 10.1007/s11998-016-9899-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9899-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29146
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible A facile technique for fabricating poly (2-methacryloyloxyethyl phosphorylcholine) coatings on titanium alloys / Chang Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : A facile technique for fabricating poly (2-methacryloyloxyethyl phosphorylcholine) coatings on titanium alloys Type de document : texte imprimé Auteurs : Chang Wu, Auteur ; Weiyuan Chang, Auteur ; Hongzhao Qi, Auteur ; Lixia Long, Auteur ; Jin Zhao, Auteur ; Xubo Yuan, Auteur ; Zhaoyang Li, Auteur ; Xianjin Yang, Auteur Année de publication : 2017 Article en page(s) : p. 1127-1135 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Compatibilité chimique et physique
Métaux -- Revêtements
Poly(2-méthacryloyloxyéthyl phosphorylcholine)
Polyaddition
Polymères en médecine
Revêtements antisalissures
Titane
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Poly (2-methacryloyloxyethyl phosphorylcholine) (PMPC) has been widely used for surface modification of titanium (Ti) alloys to improve antifouling properties and blood compatibility. To achieve antifouling and anticoagulant capacities via a facile and efficient technique, PMPC coatings were covalently immobilized on a Ti surface simply by a sequential dip-coating method. The Ti surface was first dipped into hydrochloric acid (HCl) solution to remove surface contaminants and acquire a hydroxyl-enriched surface. Then, the surface was dipped into dopamine solution to acquire the surface bearing –NH2 groups. N-acryloxysuccinimide solution was used for introduction of double linkage which could graft with PMPC via in situ free-radical polymerization. Thus, the surface modification processes were under mild conditions and easy scale up. The obtained PMPC coatings endowed the Ti surface with smooth finish and relatively high packing density. Water contact angle measurements showed that the hydrophilicity of the Ti surface was markedly improved by coating PMPC with the water contact angle of 6.2°. Furthermore, the PMPC coatings could effectively resist protein adsorption and suppress platelet adhesion and activation. The facile and efficient method of immobilization of PMPC on a Ti surface could be promising for a variety of cardiovascular applications. Note de contenu : - MATERIALS AND METHODS : Materials - Coating preparation - Surface characterization - Blood compatibility of the coatings
- RESULTS AND DISCUSSION : Surface characterization of coatings - Surface morphology and elemental analysis - Surface wettability - Protein adsorption - Platelet adhesionDOI : 10.1007/s11998-016-9900-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9900-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29147
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Cellulose nanocrystal (CNC)-based nanocomposites for UV curable high-solid coating systems / Alireza Kaboorani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Cellulose nanocrystal (CNC)-based nanocomposites for UV curable high-solid coating systems Type de document : texte imprimé Auteurs : Alireza Kaboorani, Auteur ; Nicolas Auclair, Auteur ; Bernard Riedl, Auteur ; Omid Hosseinaei, Auteur ; Siqun Wang, Auteur Année de publication : 2017 Article en page(s) : p. 1137-1145 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Vernis
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.
Copolymère époxy acrylate
Cristaux
Haut extrait sec
Hydrophobie
Nanoindentation
Nanoparticules
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements intérieurs
Rugosité
Stabilité thermique
Statistique
Vernis -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Demand for durable clear wood coatings is on the rise. Cellulose nanocrystals (CNC) constitute an organic nanomaterial widely studied in polymer composites for its reinforcing effect. In this study, CNC was used to enhance the performance of a UV curable high-solid content coating system intended for indoor environments. The CNC surface was modified by a cationic surfactant since the coating system was hydrophobic resin-based requiring hydrophobic nanomaterial reinforcement. Modified CNC was mixed with the coating system using a high-speed mixer and the ultrasonication technique. Mechanical, thermal and morphological properties and curing behavior of the newly developed UV-curing coatings were assessed. Inclusion of CNC in the coating increased the mechanical properties (hardness and reduced modulus) of the coating system to a large extent. Thermal stability of the coating system was also improved by CNC addition. The CNC did not affect the curing behavior of the coating, in contrast to most inorganic nanomaterials. The CNC dispersed well in the matrix at 1% loading. Results of this study show that CNC can be used successfully with high-solid content coating systems. Note de contenu : - EXPERIMENTAL : Materials
- METHODS : CNC surface modification
- Preparation of UV-curable formulations
- CHARACTERIZATIONS : Thermal stability - Photodifferential scanning calorimetry (photo-DSC) - Atomic force microscopy (AFM) - Nanoindentation - Statistical analyses
- RESULTS : Thermal stability - Surface roughness - Curing behavior - Mechanical propertiesDOI : 10.1007/s11998-017-9929-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9929-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29148
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Preparation of hydrophobic SiO2@(TiO2/MoS2) composite film and its self-cleaning properties in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Preparation of hydrophobic SiO2@(TiO2/MoS2) composite film and its self-cleaning properties Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 1147-1158 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Bisulfure de Molybdène
Dioxyde de silicium
Dioxyde de titane
Encapsulation
Hydrophobie
Photocatalyse
Revêtement auto-nettoyantIndex. décimale : 667.9 Revêtements et enduits Résumé : TiO2/MoS2 composite was encapsulated by hydrophobic SiO2 nanoparticles using a sol–gel hydrothermal method with methyltriethoxysilane (MTES), titanium tetrachloride (TiCl4), and molybdenum disulfide (MoS2) as raw materials. Then, a novel dual functional composite film with hydrophobicity and photocatalytic activity was fabricated on a glass substrates via the combination of polydimethylsiloxane adhesives and hydrophobic SiO2@(TiO2/MoS2) composite particles. The influence of the mole ratios of MTES to TiO2/MoS2 (M:T) on the wettability and photocatalytic activity of the composite film was discussed. The surface morphology, chemical compositions, and hydrophobicity of the composite film on the glass substrate were investigated by scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and water contact angle (water CA) measurements. The results indicated that the composite film exhibited stable superhydrophobicity and excellent photocatalytic activity for degradation of methyl orange (MO) even after five continuous cycles of photocatalytic reaction when M/T was 7:1. The water CA and degradation efficiency for MO remained at 154° and 94%, respectively. Further, the composite film showed a good non-sticking characteristic with the water sliding angle (SA) at about 4°. The SiO2@(TiO2/MoS2) composite consisting of hydrophobic SiO2 nanoparticles and TiO2/MoS2 heterostructure could provide synergistic effects for maintaining long-term self-cleaning performance. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - Characterization - Evaluation of photocatalytic degradation performance
- RESULTS AND DISCUSSION : Mechanism analysis of MTES modification - Structure and composition analysis - Optical absorption and photocatalytic activity analysis - RET surface area and pore size analysis - Influence of M/T on wettability and photocatalytic activity - Stability experiment of MO degradation - Morphology analysis - Adhesion of the composite film - Schematic analysis of self-cleaning process on composite filmDOI : 10.1007/s11998-016-9907-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9907-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29149
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Optimization of film-coating formulation containing a novel low molecular weight hypromellose to achieve balanced tablet-coating performance / Hao Gao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Optimization of film-coating formulation containing a novel low molecular weight hypromellose to achieve balanced tablet-coating performance Type de document : texte imprimé Auteurs : Hao Gao, Auteur ; Chao Wang, Auteur ; Yingjie He, Auteur Année de publication : 2017 Article en page(s) : p. 1159-1167 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Comprimés
Couches minces
Hydroxypropyl méthylcellulose
Plan d'expérience
Polymères en médecineIndex. décimale : 667.9 Revêtements et enduits Résumé : In recent years, a novel low molecular weight hypromellose (hypromellose 2906, VLV hypromellose) was developed to improve tablet-coating process and lower costs in the pharmaceutical industry. Such VLV hypromellose imparted economic, environmental, and performance benefits to the coating process and final products. However, there were still some concerns about this polymer in regard to weak mechanical strength of films and resultant stability issues of film coatings on tablets. In this study, a tablet-coating formulation was optimized using Box–Behnken design via blending conventional hypromellose with VLV hypromellose to achieve balanced coating performance in terms of highly productive coating, no sticking issues under mild coating conditions, and robust tablet film coatings in an accelerated stability study. By addition of only 5 wt% of conventional hypromellose (3.35 wt% HPMC E50 and 1.65 wt% HPMC E3), the film elongation and toughness index of optimized VLV hypromellose formulation increased by 154% and 372%, respectively, while the solution viscosity was still suitable for spray coating. The results of the following tablet-coating trials and stability study revealed that the stability and quality of tablet film coatings were significantly improved using this optimized VLV hypromellose-coating formulation, while a highly productive coating process and mild coating conditions without "sticking" issues were maintained simultaneously to the utmost extent. Note de contenu : - Materials
- Methods
- Model fitting, parameter estimation, and formulation optimization
- Model validation
- Coating performance validationDOI : 10.1007/s11998-016-9908-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9908-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29150
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible The fast deposition of antireflection coating / Shing-Dar Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : The fast deposition of antireflection coating Type de document : texte imprimé Auteurs : Shing-Dar Wang, Auteur ; Meng-Chi Li, Auteur ; Yen-Cheng Peng, Auteur ; Cheng-Chung Lee, Auteur Année de publication : 2017 Article en page(s) : p. 1169-1182 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anti-réflectance
Champs électriques
Polyélectrolytes
Revêtements
VerreIndex. décimale : 667.9 Revêtements et enduits Résumé : In this investigation, the effect of deposition time (5, 60, or 300 s) on a double-sided antireflection (AR) coating done by layer-by-layer deposition of polyelectrolyte was determined. The different structures and transmittance of an AR coating induced by electric-field-assisted layer-by-layer deposition (ELBLD) (with voltage of 0.5, 5, 50, or 500 V) and normal deposition (with voltage of 0 V) were compared. The electric field was perpendicular to the glass surface. After 5.5 bilayers of PAH/PAA were fabricated, the film was exposed to an acidic treatment of HCl solution (pH 2.4) for 65 s, followed by a brief rinse (~15 s) in deionized water, blown dry with air, and heat treated at 220°C for 2 h. Regardless of whether the electric field was applied, the average transmittance of visible light of the AR coating was more than 96% except for the reduced transmittance because of the excessive deposition of polyelectrolyte at an applied voltage of 500 V and a deposition time of 300 s. Average transmittance of 97.68 ± 0.31% was obtained at normal deposition of 5.5 bilayers with deposition time of 60 s. The polyelectrolytes had a propensity to form larger particles or accumulate into bundles under ELBLD, which was detrimental to the transmittance of an AR coating. Therefore, at the same deposition time, transmittance values of ELBLD samples were slightly lower than those of normal deposition. In other words, in the overall performance, the AR films of normal deposition are superior to those of ELBLD. The blowing pressure applied to dry the coating had significant impact on the quality of the film. Note de contenu : - Transmittance values of visible light
- AFM analysis
- SEM analysis
- Thickness and refractive index of the AR coating
- The effect of blowing pressure on transmittance of AR coating
- Comparison between normal deposition and ELBLDDOI : 10.1007/s11998-016-9909-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9909-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29151
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/phosphonic acids nanocomposites possessing superoleophobic/superhydrophilic and superoleophilic/superhydrophobic characteristics : application of these nanocomposites to the separation of oil and water in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/phosphonic acids nanocomposites possessing superoleophobic/superhydrophilic and superoleophilic/superhydrophobic characteristics : application of these nanocomposites to the separation of oil and water Type de document : texte imprimé Année de publication : 2017 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eau
Filtres
Fluor
Huiles et graisses
Hydrophobie
Matériaux hybrides
Oléophilie
Oléophobie
Oligomères
Papier
Phosphonique, Acide
Séparation (technologie)
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.
VerreIndex. décimale : 667.9 Revêtements et enduits Résumé : Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF–(CH2CHSi(OMe)3)n–RF; RF = fluoroalkyl group; n = 2, 3] can undergo the sol–gel reactions in the presence of a variety of phosphonic acid derivatives such as 1-hydroxyethylidene-1,1-diphosphonic acid, nitrilotris(methylene phosphonic acid), and 2-phosphonobutane-1,2,4-tricarboxylic acid under alkaline conditions to provide the corresponding fluorinated oligomeric silica/phosphonic acids nanocomposites. Interestingly, it was demonstrated that the modified glasses and filter papers treated with these obtained fluorinated nanocomposites can exhibit the superoleophobic/superhydrophilic and superoleophilic/superhydrophobic characteristics on their surfaces, respectively. More interestingly, the modified filter papers treated with these nanocomposites were applied to the separation of the mixture of oil and water. Note de contenu : - EXPERIMENTAL : Measurements
- MATERIALS : Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/phosphonic acids nanocomposites [Rf-(VM-Sio2)n-Rf/PHSP acids] - Preparation of modified glass treated with the Rf-(VM-Sio2)n-Rf/PHSP acids nanocomposites by casting method
- RESULTS AND DISCUSSION : Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/phosphonic acids nanocomposites - Surface modification of glasses and filter papers by the use of the Rf-(VM-Sio2)n-Rf/PHSP acids nanocompositesDOI : 10.1007/s11998-016-9910-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9910-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29152
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Nanoclay-based self-healing, corrosion protection coatings on aluminum, A356.0 and AZ91 substrates / S. Manasa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Nanoclay-based self-healing, corrosion protection coatings on aluminum, A356.0 and AZ91 substrates Type de document : texte imprimé Auteurs : S. Manasa, Auteur ; A. Jyothirmayi, Auteur ; T. Siva, Auteur ; B. V. Sarada, Auteur ; M. Ramakrishna, Auteur ; S. Sathiyanarayanan, Auteur ; K. V. Gobi, Auteur ; R. Subasri, Auteur Année de publication : 2017 Article en page(s) : p. 1195-1208 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages
AluminiumL'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Anticorrosion
Argile
Nanoparticules
Nanotubes
Revêtement autoréparant
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : Investigations were carried out to explore the feasibility of using Ce3+/Zr4+ encapsulated in environmental friendly nanoclay containers for prolonged corrosion protection of pure aluminum, aluminum alloy A356.0 and Mg alloy AZ91. Dimensions of clay nanotubes were studied using SEM and TEM analysis. They were subjected to pore volume and surface area analysis to confirm the loading of inhibitor into their lumen. The smart nanocontainers loaded with active cationic inhibitor were dispersed in an organic–inorganic hybrid sol–gel matrix synthesized from the hydrolysis and condensation of glycidoxypropyltrimethoxysilane and tetraethoxysilane. The loading of nanocontainers in the matrix sol was optimized. Coatings were generated on pure Al, A356.0, AZ91 substrates using a dip-coating technique and cured at 130°C for 1 h in air. The coated substrates were characterized for their corrosion resistance using potentiodynamic polarization and electrochemical impedance spectroscopic analysis by exposing them to 3.5 wt% NaCl solution for time intervals varying from 1 to 120 h. Micro-Raman spectroscopic studies were carried out to analyze the chemical composition of phases in the scribed area after exposure to corrosive medium. A few coated aluminum substrates were subjected to scanning vibrating electrode technique experiments to study the self-healing mechanism. Note de contenu : - EXPERIMENTAL : Materials - Sol synthesis and coating deposition - Characterization and testing
- RESULTS AND DISCUSSION : Transmission electron microscopy and BET pore volume anaysis - Salt immersion test and EDS analysis - Micro-Raman spectroscopic analysis - Potentiodynamic polarization, scanning vibrating electrode technique (SVET), and electrochemical impedance spectroscopic (EIS) analysisDOI : 10.1007/s11998-016-9912-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9912-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29153
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible An integrated antireflection design using nanotexture and high-refractive-index glass for organic photovoltaics / Shigeru Kubota in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : An integrated antireflection design using nanotexture and high-refractive-index glass for organic photovoltaics Type de document : texte imprimé Auteurs : Shigeru Kubota, Auteur ; Yoshiki Harada, Auteur ; Takenari Sudo, Auteur ; Kensaku Kanomata, Auteur ; Bashir Ahmmad, Auteur ; Jun Mizuno, Auteur ; Fumihiko Hirose, Auteur Année de publication : 2017 Article en page(s) : p. 1209-1224 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Photopiles
Revêtement antireflet
VerreIndex. décimale : 667.9 Revêtements et enduits Résumé : We propose a new antireflection (AR) design for organic photovoltaics (OPVs) to achieve broadband and omnidirectional enhancement of photocurrent. In the proposed design, a hybrid AR structure, which combines moth eye texturing and two-layer interference coating, is integrated with a glass substrate having a high refractive index (n). Using the optical simulation for OPV cells, we compare the performance of various AR configurations upon changing the refractive index of the glass substrate. We show that the short-circuit current density (JSC) is decreased by using the high-n glass substrate without AR coating, whereas JSC is significantly increased by applying the high-n glass substrate with the hybrid AR structure, suggesting an importance of the integrated design. In addition, we demonstrate that the proposed AR configuration is quite effective to attain broad angle performance and is robust against the variations in geometric features of moth eye texture. Finally, the spectral dependence of photocurrent generation is experimentally measured for the verification of the effectiveness of the integrated AR design. These results provide a practical and efficient AR technique that can further expand the potential of OPVs as energy supply devices. Note de contenu : - EXPERIMENTAL : Optical modeling - Effective medium approximation - Characteristic matrix-based analysis - Incident light condition - Device fabrication and testing
- RESULTS AND DISCUSSION : Effectiveness of the AR design with hybrid ARS and high-n glass substrate - Wide-angle AR performance - Robustness against variations in geometric features of moth eye structure - Photocurrent loss by the absorption in glass substrate - Experimental testingDOI : 10.1007/s11998-017-9914-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9914-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29154
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Salt-controlled self-healing nanogel composite embedded with epoxy as environmentally friendly organic coating / Ayman M. Atta in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Salt-controlled self-healing nanogel composite embedded with epoxy as environmentally friendly organic coating Type de document : texte imprimé Auteurs : Ayman M. Atta, Auteur ; Hamad A. Al-Lohedan, Auteur ; Ashraf M. El-Saeed, Auteur ; Hussin I. Al-Shafey, Auteur ; Mohamed Wahby, Auteur Année de publication : 2017 Article en page(s) : p. 1225-1236 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosion
Colloides
Essais de brouillard salin
Métaux -- Revêtements protecteurs
Montmorillonite
Nanotechnologie
Revêtement autoréparant
Revêtements -- Propriétés mécaniques
SodiumLe sodium est un élément chimique, de symbole Na et de numéro atomique 11. C'est un métal mou et argenté, qui appartient aux métaux alcalins. On ne le trouve pas à l'état de corps pur dans la nature, mais il est très abondant sous forme de composés, par exemple dans le sel. Il brûle avec une flamme jaune.
Le sodium possède 22 isotopes connus, avec un nombre de masse variant entre 18 et 37.Index. décimale : 667.9 Revêtements et enduits Résumé : Smart nanogel capsules are attracting great attention to act as self-healing materials for polymers and epoxy coating and as anticorrosion materials. The present work aimed at incorporating nanogel among silicate layers of sodium montmorillonite (Na-MMT) to increase its dispersibility into an epoxy matrix so as to be used as self-healing nanocomposites. For this purpose, N-isopropyl acrylamide (NIPAm) as a salt-sensitive monomer was selected to prepare smart nanogels to disperse the Na-MMT layers. The chemical structure, surface morphology, particle size distribution, surface charge, and degree of exfoliation of Na-MMT with NIPAm nanogel were investigated. The ability of Na-MMT/NIPAm to modify the mechanical, surface, and self-healing characteristics of epoxy matrix was studied. The corrosion inhibition and self-healing mechanism were discussed in light of salt spray resistance of epoxy nanocomposites to protect steel from corrosive environments. Note de contenu : - EXPERIMENTAL : Materials - Preparation of epoxy/Na-MMT nanogel composite - Characterization - Mechanical and salt spray resistance of coated epoxy nanocomposite films
- RESULTS AND DISCUSSION : Mechanical properties of Na-MMT/NIPAm epoxy nanocomposite coats - Salt spray corrosion resistance of epoxy/Na-MMT/NIPAm nanocomposite coatingsDOI : 10.1007/s11998-017-9917-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9917-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29155
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