Effects of aging on the thickness of a homogeneous film fabricated using a spin coating process / Do Hyung Han in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 3 (05/2021) . - p. 641-647 Titre : Effects of aging on the thickness of a homogeneous film fabricated using a spin coating process Type de document : texte imprimé Auteurs : Do Hyung Han, Auteur ; Doyeon Kim, Auteur ; Hye Won Yun, Auteur ; Jinho Lee, Auteur ; Un gi Lee, Auteur ; Hyun Soo Chung, Auteur ; Woo-Byoung Kim, Auteur Année de publication : 2021 Article en page(s) : p. 641-647 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Essais (technologie) Matériaux -- Epaisseur Revêtement par centrifugation Revêtements -- Détérioration Index. décimale : 667.9 Revêtements et enduits Résumé : The thickness of the film produced by spin coating is different from the theoretically calculated thickness based on the Newtonian fluid equation. In this study, the rotational time and rotational speed (in revolutions per minute [RPM]) were used as the control parameters, and the thickness differences between the actual and theoretical results were analyzed based on statistical analyses. Furthermore, we investigated the effects of the aging time (i.e., time after spin coating before heat treatment curing) independently from the parameters of the theoretical equation for spin coating of Newtonian fluids mentioned above. The thickness of the film formed by the spin coater within a period of 300 s was smaller than the theoretically predicted thickness at all rotation speeds irrespective of aging. Based on statistical analyses of the measured thickness values, we confirmed that rotational speeds in the range of 2000–6000 RPM within a period of 300 s did not yield thickness differences owing to aging time. However, below 1500 RPM, the thickness without aging time was smaller than the thickness with aging time. In addition, the thicknesses of the edge and center of the substrate were unequal but became uniform as the aging time increased. Additionally, the estimated thickness based on the constructed plots yielded completely different results from those predicted by the existing equation about Newtonian fluids. Based on the analyses of the thickness as a function of aging time and speed, we confirmed that the aging time—which was not accounted for in the conventional equation—was the parameter that primarily affected the thickness. Note de contenu : - Table 1 : Thickness profile and results of statistical hypothesis testing with and without aging times at various RPM settings - Table 2 : R-square values of estimated curves in the cases with and without use of aging times DOI : https://doi.org/10.1007/s11998-020-00429-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00429-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35918 [article]

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Facile preparation of particle-free hybrid amine silver ink with synergistic effect for low-resistivity flexible films / Liying Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1845-1856 Titre : Facile preparation of particle-free hybrid amine silver ink with synergistic effect for low-resistivity flexible films Type de document : texte imprimé Auteurs : Liying Zhang, Auteur ; Guoyou Gan, Auteur ; Peiyuan Fan, Auteur ; Yunchuan Liu, Auteur ; Tianwei Wang, Auteur ; Weichao Li, Auteur ; Jinghong Du, Auteur Année de publication : 2023 Article en page(s) : p. 1845-1856 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amines Une amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels. On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués. Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3. Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire. D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel. Argent Caractérisation Conduction électrique Encre électronique Ligands Revêtement par centrifugation Souplesse (mécanique) Synergie Index. décimale : 667.4 Encres Résumé : Amine ligand, as one of the essential components of the Ag–amine complex, is necessary to reduce the sintering temperature and time of conductive inks. Herein, we report the facile preparation of hybrid amine conductive silver ink, mainly composed of silver oxalate–hybrid amine complex and methanol–acetone solvent. The synergistic effect of long-chain and short-chain amines enhances the uniformity of silver nanoparticles in the silver film. A uniformly conductive silver film is obtained by spin-coating as-prepared ink on the polyimide film, followed by thermal sintering. Then, the influence of butylamine content and sintering parameters on the physical properties and microstructure of silver film is systematically investigated. The resistivity of silver films, sintered at 170 °C for only 20 min, is found to be 6.71 μΩ·cm, which is four times higher than bulk silver. In addition, silver films after bending and adhesion test exhibit low resistivity and excellent adhesion. These results indicate that the hybrid amine conductive silver ink can provide promising opportunities for fabricating highly conductive flexible printed electronics at low temperatures in short times. Note de contenu : - Materials - Preparation of hybrid amine ink - Spin coating and sintering of conductive silver ink - Materials characterization - Table 1 : The composition of hybrid amine ink - Table 2 : Experimental conditions and electrical properties of silver films in literatures DOI : https://doi.org/10.1007/s11998-023-00781-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00781-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40165 [article]

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Numerical modeling of the spray coating of spinning bodies / D. E. Weidner in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 363-376 Titre : Numerical modeling of the spray coating of spinning bodies Type de document : texte imprimé Auteurs : D. E. Weidner, Auteur ; Leonard W. Schwartz, Auteur ; Richard R. Eley, Auteur Année de publication : 2019 Article en page(s) : p. 363-376 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt par pulvérisation Modèles numériques Revêtement par centrifugation Index. décimale : 667.9 Revêtements et enduits Résumé : We derive the lubrication form of the fluid mechanical equations governing the motion of a thin liquid film on an arbitrarily curved, rotating, axisymmetric substrate. The resulting equations are discretized and then solved numerically using an efficient implicit finite difference algorithm. Non-Newtonian effects are included by incorporating an Ellis viscosity model. The primary application for this work is to model the spin coating of the interior of two-piece metal beverage cans, and we consider this problem in some depth. Specifically, we show how adjusting several parameters can eliminate one possible defect in the spin coating process: the tendency for droplets to detach from the substrate when the can is spun at high rotation rates. Note de contenu : - Previous work - Derivation of equations - Nondimensionalization - Numerical aspects - Applications - Conclusion - Appendix 1 : Application of coating layer - Appentix 2 : Calculating the height of a pendant drop of maximum volume DOI : 10.1007/s11998-018-0131-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0131-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32410 [article]

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Numerical modeling of the spray/spin coating of the interior of metal beverage cans : complete three-dimensional simulation / David E. Weidner in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. pages 97-109 Titre : Numerical modeling of the spray/spin coating of the interior of metal beverage cans : complete three-dimensional simulation Type de document : texte imprimé Auteurs : David E. Weidner, Auteur Année de publication : 2022 Article en page(s) : p. pages 97-109 Note générale : Bibliogr. Langues : Américain (ame) Catégories : canettes Dépôt par pulvérisation Modèles numériques Revêtement par centrifugation Simulation par ordinateur Index. décimale : 667.9 Revêtements et enduits Résumé : In this work we develop a numerical simulation of the spray coating of spinning beverage cans. Though the substrate of the can must be axisymmetric, the coating need not be. We start with an evolution equation, which was derived using scaling arguments and perturbation theory. We then use implicit finite differences and an ADI scheme, with periodic boundary conditions, to efficiently solve the problem numerically. The spray fan is modeled as an expanding ellipse, and we use parameters typical of the coating industry in our simulations. The simulations show that if the can rotates an exact integral number of rotations during the spray process, then the coating layer is almost axisymmetric. But when this cannot be achieved, then three-dimensional effects greatly change the coating dynamics of the thin liquid film and must be included in the analysis. Note de contenu : - Previous work - Derivation of fundamental equations - Spray fan and can geometry - Nondimensionalization - Numerical aspects - Results - Table 1 : Dimensional parameters for this simulation - Table 2 : Nondimensional parameters for this simulation DOI : https://doi.org/10.1007/s11998-021-00517-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00517-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37148 [article]

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Polycaprolactone tridentate ligand corrosion inhibitors coated on biodegradable Mg implant / Hamouda M. Mousa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 4 (07/2021) . - p. 1191-1197 Titre : Polycaprolactone tridentate ligand corrosion inhibitors coated on biodegradable Mg implant Type de document : texte imprimé Auteurs : Hamouda M. Mousa, Auteur ; Mahmoud A. Mahmoud, Auteur ; Ahmed S. Yasin, Auteur ; Ibrahim M. A. Mohamed, Auteur Année de publication : 2021 Article en page(s) : p. 1191-1197 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Caractérisation Implants orthopédiques Ligands Magnésium -- Alliages Métaux -- Revêtements protecteurs Poly-e-caprolactone Revêtement par centrifugation Revêtements organiques Tissu osseux Index. décimale : 667.9 Revêtements et enduits Résumé : Magnesium (Mg) is widely used in different tissue engineering applications such as bone fracture fixations and cardiovascular stent applications. However, it exhibits high degradation properties in the physiological medium and hence loses its mechanical properties. Herein, AZ31 Mg alloy was spin-coated with polycaprolactone (PCL) polymer blended with Schiff base derived from amino acid as a corrosion inhibitor. Coated samples were characterized using field emission electron microscopy (FESEM) and Fourier-transform infrared spectroscopy (FTIR) analysis. Additionally, corrosion behavior was evaluated using electrochemical potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Moreover, the bioactivity of the studied samples was confirmed in vitro with MC3T3-E1 osteoblasts cells. Results show that coated samples with corrosion inhibition efficiency of blended PCL and L-isoleucine Schiff (PCL-SI) reached 66% compared to that of pure PCL 39%. This suggests that the introduced materials were superior to control biodegradability and biocompatibility of the bare alloy in bone tissue engineering application. Note de contenu : - Table 1 : Summary of electrochemical corrosion test DOI : https://doi.org/10.1007/s11998-021-00478-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00478-w.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36224 [article]

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Reduction in edge beading defects using two-axis spin coating technology : an analytical, numerical, and experimental study / Soroosh Mahmoodi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)  

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Superhydrophobic route of fabricating antireflective, self-cleaning, and durable coatings for solar cell applications / Anne Sathya in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)  

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Thin films of cyclotriphosphazenes containing 1,3,4-oxadiazoles as fluorophores / Martín Caldera-Villalobos in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)  

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Two-dimensional spin coating with a vertical centrifugal force and the effect of artificial gravity on surface leveling / Soroosh Mahmoodi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)  

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