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A review of solid-state lighting and its impact on the marketing and production of decorative coatings / Danny C. Rich in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 1-9 Titre : A review of solid-state lighting and its impact on the marketing and production of decorative coatings Type de document : texte imprimé Auteurs : Danny C. Rich, Auteur Année de publication : 2016 Article en page(s) : p. 1-9 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eclairage Métamérisme Revêtements décoratifs Index. décimale : 667.9 Revêtements et enduits Résumé : Solid-state lighting in the form of light emitting diode lamps is quickly taking over the world as replacements for existing lower efficiency lamps. The lighting standards, which phased in from 2012 to 2014, do not ban incandescent or any specific lamp type, but they do require that lamps need to use about 25% less energy. The bipartisan Energy Independence and Security Act of 2007 (EISA 2007) established these efficiency standards. Many commercial lamps meet these new standards, including halogen incandescent filament, CFLs, and LEDs. The new bulbs provide a wide range of choices in color and brightness, and many of them last much longer than traditional lamps. However, the spectral distribution of flux from some of these new lamps do not match or even correspond to the spectral power distribution of traditional office and home lighting. In this review, the impact of the new lamp lights on the design, marketing, and production of modern decorative coatings is assessed. The decorative coatings industry has followed recommended guidelines for many decades, producing color-matches that are acceptable under a series of standard illuminants (D65, CWF, A) which are representative of the lamp lights in most common facilities. The new solid-state lamps do not render object colors in ways similar to the currently adopted standardized illuminants. The primary obstacle to the coatings manufacturer is the lack of standards on how to test color-matches for quality conformance under the new lamp lights. As the energy efficient lighting industry is currently still in a technologically developing phase, it appears that it will be some time before any agreements on the characteristics of modern lamp light will be reached. Therefore, guidance is provided on creating and/or using illuminant data representative of these lamps until official reference illuminants are published. Note de contenu : - Lighting in point of sale matching - What the coatings industry can do to adapt to SSL DOI : 10.1007/s11998-015-9704-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9704-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25367 [article]

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Superhydrophobic surfaces for corrosion protection : a review of recent progresses and future directions / Dawei Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 11-29 Titre : Superhydrophobic surfaces for corrosion protection : a review of recent progresses and future directions : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9744-6.pdf Type de document : texte imprimé Auteurs : Dawei Zhang, Auteur ; Luntao Wang, Auteur ; Hongchang Qian, Auteur ; Xiaogang Li, Auteur Année de publication : 2016 Article en page(s) : p. 11-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Hydrophobie Microstructures Mouillage (chimie des surfaces) Revêtement autoréparant:Peinture autoréparante Index. décimale : 667.9 Revêtements et enduits Résumé : Due to their superior water-repelling effects, superhydrophobic surfaces have received increasing attention as a promising solution to corrosion of metallic materials. The present article introduces the fundamental theories behind superhydrophobicity followed by a comprehensive review of the recent progresses of this rapidly growing field over the past 5 years. A critical discussion over anticorrosion mechanisms of superhydrophobic surfaces is also provided. For many realistic applications, future efforts are pressingly demanded to prolong the corrosion resistance of these superhydrophobic surfaces. To this end, several important strategies and examples in designing stable, self-healable, or inhibitor-loaded superhydrophobic surfaces are discussed. Note de contenu : - THE THEORY OF SUPERHYDROPHOBIC SURFACES : Wettability of a smooth surface - Wettability of a rough surface - APPLICATION OF SUPERHYDROPHOBIC SURFACES FOR CORROSION PROTECTION : Etching - Wet chemical reaction - Hydrothermal method - Anodization - Electrodeposition - Sol-gel method - Nanocomposite coatings - Templating - Mechanistic aspects - FUTURE TRENDS IN DEVELOPMENT OF SUPERHYDROPHOBIC SURFACES WITH LONG-LASTING CORROSION RESISTANCE : Improving the stability of superhydrophobic surfaces - Self-healing capability of superhydrophobic surfaces - Inhibitor-containing superhydrophobic coatings DOI : 10.1007/s11998-015-9744-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9744-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25368 [article]

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The effect of carbon nanotubes loaded with 2-mercaptobenzothiazole in epoxy-based coatings / Kunal V. Yeole in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 31-40 Titre : The effect of carbon nanotubes loaded with 2-mercaptobenzothiazole in epoxy-based coatings Type de document : texte imprimé Auteurs : Kunal V. Yeole, Auteur ; L. P. Agarwal, Auteur ; Shashank T. Mhaske, Auteur Année de publication : 2016 Article en page(s) : p. 31-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Caractérisation Couches minces multicouches Diffractométrie de rayons X Epoxydes Essais (technologie) Essais de brouillard salin Fourier, Spectroscopie infrarouge à transformée de Humidité -- Absorption:Eau -- Absorption Mercaptobenzothiazole Métaux -- Revêtements protecteurs Morphologie (matériaux) Nanotubes Polarisation (lumière) Polypyrroles Potentiel zeta Revêtements -- Analyse:Peinture -- Analyse Taille des particules Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : Currently, anticorrosive coatings find a large number of applications and can be effectively used for corrosion protection of many corrosion-prone metals like aluminum, iron, etc. Nanocontainers have the ability to encapsulate large amounts of guest molecules within their core, and releasing them in a controlled way can aid in providing self-healing abilities to the coating, thus providing active protection. In the present study, a novel approach of synthesis of nanocontainers using carbon nanotubes (CNTs) and corrosion inhibitor 2-mercaptobenzothiazole has been discussed with their applications in corrosion protection of mild steel (MS). It is a three-step procedure involving layer-by-layer deposition of the CNT, inhibitor, and polyelectrolytes, which thus provides enhanced corrosion protection when coated on MS plates. The thickness of the layer, surface charge, and functional groups present on each layer were identified using various analytic techniques such as particle size distribution, zeta potential, and FTIR analysis. X-ray diffractograms analyses of CNT and modified CNT were performed to evaluate their crystallographic properties. The morphological and particle size clearly indicate the development of a nanocontainer. The corrosion rate analysis of nanocontainer-epoxy coatings on MS panel has been performed by means of salt spray and DC polarization measurements. The corrosion resistance was measured after the immersion of the coated samples in alkali solution. Note de contenu : - EXPERIMENTAL : Materials and reagent - Coating of polypyrrole layer on CNT - Loading of 2-mercaptobenzothiazole (MBT) - Coating of polyacrylic acid layer - Application in epoxy-based coatings - CHARACTERIZATION - RESULTS AND DISCUSSION : FTIR - XRD analysis - Morphological study - Thermogravimetric analysis - Particle size and zeta potential analysis - Release study of corrosion inhibitor at different pH values - Water absorption test - Salt spray test - DC polarization measurement DOI : 10.1007/s11998-015-9730-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9730-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25369 [article]

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Development of hyperbranched polyester polyol-based waterborne anticorrosive coating / Ashish Pratap Singh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 41-51 Titre : Development of hyperbranched polyester polyol-based waterborne anticorrosive coating Type de document : texte imprimé Auteurs : Ashish Pratap Singh, Auteur ; C. Suryanarayana, Auteur ; R. Baloji Naik, Auteur ; G. Gunasekaran, Auteur Année de publication : 2016 Article en page(s) : p. 41-51 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 Métaux -- Revêtements protecteurs Polyesters Polymères ramifiés Polyols Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Water-soluble hydroxyl functionalized hyperbranched polyester (WH-HP) resin was synthesized using pentaerythritol, pyromellitic dianhydride, phthalic anhydride, and 1,1,1-tris(hydroxymethyl)propane. The synthesized WH-HP was characterized by spectroscopic (FTIR and NMR) as well as thermal (TGA and DSC) analysis. WH-HP and hexa methoxy methyl melamine (HMMM) resins were mixed in different mole ratios (1:2.5, 1:5, 1:7.5, and 1:10), coated on mild steel panel, and cured by baking at 110°C for 1 h. These coating compositions were evaluated for their mechanical and anticorrosive properties. It was observed that coating composition having 1:5 mol ratio (WH-HP:HMMM) has shown very good mechanical and anticorrosive properties compared to the rest. Note de contenu : - MATERIALS AND EXPERIMENTAL METHODS : Materials - Synthesis of polyester polyol (PP) - Synthesis of carboxyl-functionalized hyperbranched polyester (C-HP) - Synthesis of water-soluble hydroxyl-functionalized hyperbranched polyester resin (WH-HP) - Preparation of coating compositions - CHARACTERIZATION : Acid value - Characterization of resins - Gel content - Gel permeation chromatography (GPC) analysis - Particle size analysis - Resistance in corrosion under different exposure conditions - Electrochemical impedance spectroscopy (EIS) - RESULTS AND DISCUSSION : FTIR analysis - 1H and 13C NMR analysis - Thermal properties of films - Gel permeation chromatography (GPC) analysis - Gel content - Particle size distribution of WH-HP polymer - Mechanical properties - Solvent resistance - Anticorrosive properties DOI : 10.1007/s11998-015-9720-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9720-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25370 [article]

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Acrylic polymer influence on the structure and morphology of AgNPs obtained by chemical method for antimicrobial applications / Alexandra Pica in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 53-61 Titre : Acrylic polymer influence on the structure and morphology of AgNPs obtained by chemical method for antimicrobial applications Type de document : texte imprimé Auteurs : Alexandra Pica, Auteur ; Cornelia Guran, Auteur ; Denisa Ficai, Auteur ; Anton Ficai, Auteur ; Florica Dumitru, Auteur Année de publication : 2016 Article en page(s) : p. 53-61 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens Argent Colloides -- Stabilité Nanoparticules Polyacryliques Réduction (chimie) Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, we present the synthesis of small silver nanoparticles (AgNPs) with an average size of 1–20(50) nm. Three formulations of AgNPs-based materials have been obtained and characterized by varying the weight ratio of the silver nitrate/acrylic polymer. AgNPs were prepared by simple chemical reduction method. The reduction of AgNO3 was done by sodium borohydride in the presence of acrylic polymer, which acts also as a capping agent of AgNPs, avoiding the use of additional protective agents. The elemental analysis of AgNPs was quantified by X-ray fluorescence. The morphology and size of AgNPs were characterized by SEM and TEM–HRTEM, while the colloidal stability of AgNPs was demonstrated by zeta potential measurements. The influence of acrylic polymer on the stability of AgNPs, the particle sizes, and their antimicrobial efficacy was investigated. The results confirm that the introduction of acrylic polymer during the synthesis, acting as a stabilizing agent, increases the colloidal stability and antimicrobial performances of these formulations. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Equipment - Synthesis of silver nanoparticles - Antimicrobial activity using a time-kill procedure - RESULTS AND DISCUSSION : The colloidal stability of silver nanoparticles in aqueous solution - Morphological assessments - Antibacterial activity DOI : 10.1007/s11998-015-9721-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9721-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25371 [article]

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Intercalated polybenzoxazine/organoclay composites with enhanced performance in corrosion resistance / Changlu Zhu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 63-72 Titre : Intercalated polybenzoxazine/organoclay composites with enhanced performance in corrosion resistance Type de document : texte imprimé Auteurs : Changlu Zhu, Auteur ; Xin Lu, Auteur ; Zhong Xin, Auteur ; Yanfeng Zhang, Auteur Année de publication : 2016 Article en page(s) : p. 63-72 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Argile Charges (matériaux) Montmorillonite Polybenzoxazine Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Organoclays modified by two different pillaring agents were introduced in polybenzoxazine (PBz) coatings on mild steel (MS). Both physicochemical properties and corrosion protection performance of composite coatings were fully investigated with the assistance of FTIR, XRD, AFM, SEM, and electrochemical measurements. The octadecyl quaternary ammonium-modified organoclays exhibited an exfoliated structure in polymer matrix, which benefited little in coatings’ barrier property. However, organoclays modified by dimethyl dioctadecyl quarternary ammonium induced an intercalated structure in composites, which greatly enhanced the corrosion resistance of poly(BA-aptms) with corrosion rate reduced by 3 and 4 orders of magnitude, respectively, compared to PBz and bare MS when 3 wt% of organoclays were added. DOI : 10.1007/s11998-015-9722-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9722-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25372 [article]

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Preparation and characterization of ambient-temperature self-crosslinkable water-soluble acrylic resin for PE film ink / Pi-Hui Pi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 73-80 Titre : Preparation and characterization of ambient-temperature self-crosslinkable water-soluble acrylic resin for PE film ink Type de document : texte imprimé Auteurs : Pi-Hui Pi, Auteur ; Xi Chen, Auteur ; Wen Xiufang, Auteur ; Shouping Xu, Auteur ; Jiang Chen, Auteur Année de publication : 2016 Article en page(s) : p. 73-80 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Adipique dihydrazide, Acide L'acide dihydrazide adipique (ADH) est un produit chimique utilisé pour la réticulation à l'eau des émulsions . Il peut également être utilisé en tant que durcisseur pour certains résines époxydes. L'ADH est une molécule symétrique avec un squelette C4 et le groupe réactif est C = ONHNH 2. Les dihydrazides sont fabriqués par la réaction d'un acide organique avec de l'hydrazine . Il existe d'autres dihydrazides avec différents squelettes, également fréquents, y compris isophtalique dihydrazide (IDH) et dihydrazide sébacique (SDH). Copolymère diacétone acrylamide Couches minces Polyacryliques Polyéthylène Polymères -- Synthèse Polymères hydrosolubles Réticulation (polymérisation) Index. décimale : 667.9 Revêtements et enduits Résumé : An ambient-temperature self-crosslinkable acrylic resin was synthesized by solution polymerization, with ethanol as solvent; butyl acrylate (BA), methyl methacrylate (MMA), acrylic acid (AA), hydroxypropyl acrylate (HPA), and diacetone acrylamide (DAAM) as monomers; and adipic acid dihydrazide (ADH) as crosslinker. The resin could be diluted by water. The resin was used for PE film ink, and its curing behavior and film properties were studied. FTIR and DSC results indicated that the reaction between ketone carbonyl and hydrazine groups could occur during film curing at ambient temperature and improved glass transition temperature (T g) of the film by 12.67°C. Crosslinking density of film increased with DAAM content and m(ADH)/m(DAAM) ratio. Adhesion on PE film increased with DAAM content, while it first increased then decreased with m(ADH)/m(DAAM) ratio. Water absorption of film decreased with DAAM content, while it first decreased then increased with m(ADH)/m(DAAM) ratio. The optimal m(ADH)/m(DAAM) ratio and DAAM content in this experiment are 0.8:1 and 2%, respectively. Compared with ambient-temperature self-crosslinkable emulsion, this water-soluble resin shows film not only with the same adhesion, but also without any shrinkage void, indicating better film-forming ability on PE film. The ambient-temperature self-crosslinkable water-soluble acrylic resin shows excellent potential application in water-based ink for PE film because of good film-forming ability and adhesion and low water absorption. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of ambient-temperature self-crosslinkable acrylic resin - Preparation of ink film - Characterization - RESULTS AND DISCUSSION : FTIR spectra analysis - DSC analysis - GPC analysis - Influence of DAAM content on the properties of films - Influence of ADH/DAAM ratio on the properties of films - Influence of surface tension of PE film - Curing temperature and time DOI : 10.1007/s11998-015-9742-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9742-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25377 [article]

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Influence of concentration of redox couple on freeze-thaw stability of styrene-acrylic copolymer latex / Chandrashekara R. Haramagatti in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 81-88 Titre : Influence of concentration of redox couple on freeze-thaw stability of styrene-acrylic copolymer latex Type de document : texte imprimé Auteurs : Chandrashekara R. Haramagatti, Auteur ; Subhadip Sikdar, Auteur ; Shruti Bhattacharya, Auteur Année de publication : 2016 Article en page(s) : p. 81-88 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère styrène acrylique Latex Oxydoréduction Polymérisation en émulsion Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Styrene-acrylic copolymer latexes were synthesized by emulsion polymerization process using sodium formaldehyde sulphoxylate (SFS) and tert-butyl hydroperoxide (TBHP) as redox initiators. Approximately 100% conversion was achieved successfully at 50°C. The redox polymerization was carried out at varied dosages of redox concentration; the lowest dosage of 0.3% was sufficient to achieve ~100% conversion. The molecular weight of the polymer was decreased with an increase in redox concentration as expected. The properties such as viscosity, specific conductivity, particle size, molecular weight, and Tg (by differential scanning calorimetric and dynamic mechanical analysis) of the redox polymers are reported. The other important property of the latexes is their freeze–thaw (F–T) stability. Even though ~100% conversion was achieved at 0.3% redox initiator couple, it failed in F–T stability test. Latexes prepared above 0.5% redox initiator couple successfully pass the five F–T cycles. The effect of sulfate from SFS, and tertiary butyl from TBHP species on the stability of the latexes is discussed. The F–T stability of the emulsions is very crucial in the coatings industry, and this article brings some insight into the effect of concentration of redox species on the stability of emulsions. Moreover, low-temperature processes are always appreciated in terms of safety and energy savings. DOI : 10.1007/s11998-015-9727-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9727-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25378 [article]

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Ultrasonic coating of nanofibrous webs : a feasible approach to photocatalytic water filters / Ramazan Simsek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 89-95 Titre : Ultrasonic coating of nanofibrous webs : a feasible approach to photocatalytic water filters Type de document : texte imprimé Auteurs : Ramazan Simsek, Auteur ; Yusuf Polat, Auteur ; Esra Serife Pampal, Auteur ; Onur Agma, Auteur ; Ali Kilic, Auteur Année de publication : 2016 Article en page(s) : p. 89-95 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composés inorganiques -- Synthèse Décomposition (chimie) Dioxyde de titane Electrofilature Essais (technologie) Filtres Membranes (technologie) Nanofibres Photocatalyse Ultrasons Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, we introduce ultrasound-assisted coating as a simple means of functionalizing nanofibrous membranes for photocatalytic (PC) water filtration. TiO2 nanoparticles, which have an anatase crystalline phase with superior PC activity, were directly synthesized over TPU nanofibers and the coated membranes were characterized using scanning electron microscopy (SEM) and X-ray diffractometry. The SEM images confirmed that the addition of polyethylene glycol reduced the nanoparticle dimensions and yielded greater distribution over the nanofibers. UV–Vis analysis demonstrated that Ag decoration over the coating enhanced the PC performance by up to 69.4% following 2-h UV illumination. Note de contenu : - MATERIALS AND METHODS : TPU nanofiber electrospinning - TiO2 NP synthesis - Morphological analysis - MB decomposition test - RESULTS AND DISCUSSION : Morphological analysis - MB decomposition performance of PC filters DOI : 10.1007/s11998-015-9718-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9718-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25379 [article]

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Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050 / E. Ghasemi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 97-114 Titre : Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050 Type de document : texte imprimé Auteurs : E. Ghasemi, Auteur ; S. Saket, Auteur ; S. Ashhari, Auteur Année de publication : 2016 Article en page(s) : p. 97-114 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages Anticorrosion Caractérisation Electrochimie Epoxydes Matériaux hybrides Nanoparticules Nanostructures Pigments inorganiques Revêtements:Peinture Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : The MnAl2O4 and CoAl2O4 nanopigments were synthesized through solution combustion method. The nanopigments extracts in the 3.5 wt% NaCl solution were prepared. Electrochemical impedance spectroscopy (EIS) and linear polarization (LP) techniques were utilized to investigate the corrosion inhibition properties of the pigments in the solutions containing pigments extracts. The epoxy nanocomposites were prepared and applied on the aluminum specimens. EIS and pull-off measurements were performed to characterize the corrosion protection properties of the epoxy nanocomposites. It was revealed that the MnAl2O4 pigment showed higher corrosion inhibition properties than CoAl2O4 in the solution phase. In addition, MnAl2O4 enhanced the corrosion resistance and decreased the adhesion loss of the epoxy coating on the aluminum substrate significantly. The MnAl2O4 nanopigment improved the corrosion resistance of the epoxy coating through increasing the barrier performance and releasing inhibitive species. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of pigments - Pigments extract preparation - Epoxy nanocomposite preparation - Characterization - RESULTS AND DISCUSSION : XRD and SEM analyses - Corrosion inhibition evaluation of the Co- and Mn-doped nanopigments - Studying the corrosion inhibition mechanism of the nanopigments - Anticorrosion performance of epoxy nanocomposites - Pull-off adhesion test results - Corrosion protection mechanism of MnAl2O4 nanopigment in the epoxy coating DOI : 10.1007/s11998-015-9728-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9728-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25380 [article]

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Dip-coating for dodecylphosphonic acid derivatization on aluminum surfaces: an easy approach to superhydrophobicity / Y. M. Hu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 115-121 Titre : Dip-coating for dodecylphosphonic acid derivatization on aluminum surfaces: an easy approach to superhydrophobicity Type de document : texte imprimé Auteurs : Y. M. Hu, Auteur ; Y. Zhu, Auteur ; W. Zhou, Auteur ; H. Wang, Auteur ; J. H. Yi, Auteur ; S. S. Xin, Auteur ; W. J. He, Auteur ; T. Shen, Auteur Année de publication : 2016 Article en page(s) : p. 115-121 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium L'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. Caractérisation Dip-coating Dodécylphosphonique, Acide Hydrophobie Métaux -- Revêtements protecteurs Mouillage (chimie des surfaces) Surfaces (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : An easy approach of rapid dip-coating to superhydrophobic aluminum (Al) surfaces is reported. Dodecylphosphonic acid (DDPA) layers were formed on periodic micro-column-patterned Al surfaces by a rapid dip-coating in a 2 mM DDPA solution in trichloroethylene. It was demonstrated that DDPA layers were derived on Al substrates in a couple of seconds and superhydrophobic Al surfaces were achieved with water static contact and sliding angles of 153° and 5°, respectively. Atomic force microscope and X-ray photoelectron spectroscopy (XPS) measurements showed that multilayer and island structural DDPA layers were formed on Al substrates. XPS analyses demonstrated that DDPA headgroups were connected with Al by P–O–Al bonds which contributed to the excellent durability of the superhydrophobic Al surfaces. Note de contenu : - EXPERIMENTAL : Materials and sample preparation - Surface characterization - XPS measurements - Surface wetting properties characterization - RESULTS AND DISCUSSION : Surface morphology - Surface chemical composition - Surface wetting properties DOI : 10.1007/s11998-015-9729-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9729-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25381 [article]

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Effect of siloxane-modified polyacrylate on water uptake and anticorrosion mechanism of silicone–epoxy coatings / X. Yuan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 123-132 Titre : Effect of siloxane-modified polyacrylate on water uptake and anticorrosion mechanism of silicone–epoxy coatings Type de document : texte imprimé Auteurs : X. Yuan, Auteur ; Z. F. Yue, Auteur ; Z. Q. Liu, Auteur ; S. F. Wen, Auteur ; L. Li, Auteur ; T. Feng, Auteur Année de publication : 2016 Article en page(s) : p. 123-132 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages Angle de contact Anticorrosifs Anticorrosion Copolymère silicone époxy Humidité -- Absorption:Eau -- Absorption Métaux -- Revêtements protecteurs Polyacrylates Polymères à silane modifié Revêtements:Peinture Spectroscopie d'impédance électrochimique Transition vitreuse Index. décimale : 667.9 Revêtements et enduits Résumé : Silicone–epoxy coatings containing siloxane-modified polyacrylate (SMP) were prepared. The effects of SMP on the hydrophobicity and water uptake behavior and on the corrosion resistance provided by the coatings were examined using contact angle measurements, glass-transition temperatures, and electrochemical impedance spectroscopy. The water uptake behavior of silicone–epoxy coatings with higher SMP content decreased to a greater extent for coatings with higher hydrophobicity. The anticorrosion protection of 2024 Al-alloy by silicone–epoxy coatings containing SMP correlated well with their water uptake and hydrophobicity. Note de contenu : - EXPERIMENTAL : Materials and sample preparation - EIS measurements and data analysis - Contact angle measurements - Tg analysis - RESULTS AND DISCUSSION : Water diffusion behavior in silicone-epoxy hybrid coatings - Surface contact angle analysis of silicone-epoxy hybrid coatings - Tg analysis of silicone-epoxy hybrid coatings - Effect of SMP on corrosion behavior of silicone-epoxy hybrid coatings on Al-alloy DOI : 10.1007/s11998-015-9732-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9732-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25382 [article]

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Effect of the type of illumination on perceived blackness of automotive finishes / R. Jafari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 133-141 Titre : Effect of the type of illumination on perceived blackness of automotive finishes Type de document : texte imprimé Auteurs : R. Jafari, Auteur ; Farhad Ameri, Auteur ; N. Khalili, Auteur Année de publication : 2016 Article en page(s) : p. 133-141 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Eclairage Evaluation visuelle Noir (couleur) vision des couleurs Index. décimale : 667.9 Revêtements et enduits Résumé : The blackness perception of six black automotive finishes was evaluated under three different illumination conditions: unidirectional illumination, diffuse illumination and light booth condition. The metallic black panels with approximately the same appearance attributes, specular gloss, distinctness of image and orange peel, were selected to minimize the effect of total appearance factors on perceived blackness. Fourteen non-expert observers (5 males and 9 females) assessed the black panels while their normal color vision was examined by the Ishihara test. The pair comparison method was applied to rank the metallic black panels based on their perceived blackness. The results showed that under the diffuse illumination condition, a good correlation was observed between the lightness attribute of metallic black panels and their visual scales, where a decrease of the L* value leads to an increase of perceived blackness. In addition, observers assessed the darkest and the most neutral panel as the blackest sample under the three applied illumination conditions. Note de contenu : - Samples preparation - Samples selection - Instrumental measurements - Visual assessment experiments DOI : 10.1007/s11998-015-9734-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9734-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25383 [article]

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The protective effects and aging process of the topcoat of intumescent fire-retardant coatings applied to steel structures / Ji Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 143-157 Titre : The protective effects and aging process of the topcoat of intumescent fire-retardant coatings applied to steel structures Type de document : texte imprimé Auteurs : Ji Wang, Auteur Année de publication : 2016 Article en page(s) : p. 143-157 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Essais accélérés (technologie) Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Intumescence (chimie) Polyuréthanes Revêtements -- Effets du rayonnement ultraviolet Revêtements -- Finition:Peinture -- Finition Revêtements protecteurs -- Détérioration Index. décimale : 667.9 Revêtements et enduits Résumé : The protective effects of a topcoat on an intumescent fire-retardant coating were studied under hydrochloric acid solution corrosion, accelerated UV aging and natural weathering. The protective effects were determined to be appreciable under all the aging conditions. During hydrochloric acid corrosion testing, the coating sample without the topcoat exhibited no fire resistance after immersion for 48 h. When a topcoat was used, the acid solution could not directly corrode the fire-retardant coating. However, the solution was observed to seep into the coating layer from the edges, demonstrating that special attention must be paid to the edges and corners to avoid the pollution source corroding the coating and substrate. Under the accelerated UV aging conditions, the fire-resistant properties of the unprotected coating deteriorated significantly after 20 days of aging due to the hydrolysis and photooxidation of the components. However, the coating with a topcoat exhibited better fire-proof properties, even after 40 days of aging. During the natural weathering process, the fire resistance of the coating without a topcoat significantly decreased after being exposed to the high levels of precipitation and UV radiation that occur during summer. The fire-resistant properties were completely lost after 1 year of aging exposure. However, the protected sample exhibited no distinct changes in the duration of fire resistance. The results of this study remind engineering personnel to pay attention to the deterioration of the coating properties and to take protection measures. Despite slightly decreasing the fire resistance performance and increasing the cost, the protective effect of the topcoat was remarkable. Therefore, a compatible topcoat is considered indispensable for fire-retardant coatings used outdoors to ensure the best long-term fire resistance performance. Note de contenu : - EXPERIMENTAL : Specimen preparation - Aging scenarios - Testing equipment and conditions - EXPERIMENT RESULTS : The protective effect of the topcoat for the acid corrosion - The protective effect of the topcoat for accelerated UV aging - The protective effect of the topcoat for natural weathering DOI : 10.1007/s11998-015-9733-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9733-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25384 [article]

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Facile synthesis of epoxy nanocomposite coatings using inorganic nanoparticles for enhanced thermo-mechanical properties : a comparative study / Rawaiz Khan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 159-169 Titre : Facile synthesis of epoxy nanocomposite coatings using inorganic nanoparticles for enhanced thermo-mechanical properties : a comparative study Type de document : texte imprimé Auteurs : Rawaiz Khan, Auteur ; Muhammad Rizwan Azhar, Auteur ; Arfat Anis, Auteur ; Mohammad Asif Alam, Auteur ; M. Boumaza, Auteur ; Saeed M. Al-Zahrani, Auteur Année de publication : 2016 Article en page(s) : p. 159-169 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Dioxyde de silicium Epoxydes Matériaux hybrides Nanoindentation Nanoparticules Oxyde de fer Oxyde de zinc Revêtements -- Propriétés mécaniques Revêtements -- Propriétés thermiques Zircone Le dioxyde de zirconium ou oxyde de zirconium(IV) couramment appelée zircone est un composé inorganique du zirconium de formule ZrO2. Ce matériau est une céramique technique d'aspect opaque. Appelé CZ (Cubic Zirconia) lorsque transparent, il est utilisé pour imiter le diamant. Il ne faut pas le confondre avec le zircon (ZrSiO4). Sous sa forme tétragonale, l'oxyde de zirconium est un matériau a vocation mécanique, cette évolution cristallographique lui confère une dureté très élevée (1200Hv) ainsi qu'une bonne résistance aux sollicitations mécaniques (700Mpa en traction et 2000Mpa en compression). Une fois polie, la zircone tétragonale peut atteindre un Ra de 0,02, ce qui permet de l'utiliser pour des pièces de frottement. Index. décimale : 668.5 Parfums et cosmétiques Résumé : Epoxy-based nanocomposite coatings were formulated by incorporating various types of inorganic nanoparticles (NPs) (ZrO2, ZnO, Fe2O3, and SiO2). The effect of the incorporation of various NPs on the mechanical, thermal, and morphological properties of these epoxy coatings has been studied. A facile direct incorporation technique has been utilized for the dispersion of the NPs in the epoxy matrix via high-speed mechanical stirring and ultra-sonication using acetone as a solvent. The incorporation of these NPs augmented the mechanical and thermal properties of the epoxy coatings. The results revealed that the incorporation of small amount of these NPs improved the mechanical properties of the coating in all cases, with the SiO2-reinforced sample being relatively better in both mechanical and thermal properties. The incorporation of Fe2O3 and ZnO resulted in a decrease in the thermal stability and glass transition temperature (T g) of the coatings, while incorporation of SiO2 and ZrO2 increased the thermal stability as well as T g of the coatings. A notable increase of 71% in hardness together with 26% increase in the elastic modulus of the epoxy coating was observed with the incorporation of 2 wt% SiO2 NPs. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - CHARACTERIZATION - RESULTS AND DISCUSSION : Miscrostructure characterization - Fourier transform infrared spectroscopy and X-ray diffraction analysis - Mechanical properties - Thermal properties DOI : 10.1007/s11998-015-9736-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9736-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25385 [article]

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Study of the performance of polyurethane coatings derived from cottonseed oil polyol / Prashant Narute in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 171-179 Titre : Study of the performance of polyurethane coatings derived from cottonseed oil polyol Type de document : texte imprimé Auteurs : Prashant Narute, Auteur ; Aruna Palanisamy, Auteur Année de publication : 2016 Article en page(s) : p. 171-179 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale Analyse thermomécanique dynamique Caractérisation Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Epoxydation Huile de coton Hydroxylation Polyols Polyuréthanes Revêtements -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : Cottonseed oil (CSO) was converted into a polymerizable polyol by in-situ epoxidation and hydroxylation in the presence of water as nucleophile and sulfuric acid as catalyst. This hydroxylated CSO (HCSO) was polymerized with isophorone diisocyanate at different NCO-to-OH ratios to furnish polyurethane coatings of different composition. The mechanical properties of the resulting moisture-cured films were studied. The adhesion, abrasion resistance, impact strength, flexibility, water vapor permeability, and chemical and/or solvent and corrosion resistance of the coatings were investigated. Note de contenu : - EXPERIMENTAL : Characterization - Epoxidation of cottonseed oil - Hydroxylation of epoxidized cottonseed oil - Preparation of crosslinked PU coatings - RESULTS AND DISCUSSION : Spectral analysis of cotton seed oil derivatives epoxidized oil and polyol - Properties of the PU films - Dynamic mechanical thermal analysis - Mechanical properties - Physicochemical properties DOI : 10.1007/s11998-015-9741-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9741-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25386 [article]

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Natural and synthetic clay-filled coatings for insulation barrier applications / Roy T. Fox in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 181-189 Titre : Natural and synthetic clay-filled coatings for insulation barrier applications Type de document : texte imprimé Auteurs : Roy T. Fox, Auteur ; H. Zhang, Auteur ; M. A. Barger, Auteur ; C. Han, Auteur ; M. Paquette, Auteur Année de publication : 2016 Article en page(s) : p. 181-189 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile Caractérisation Charges (matériaux) Latex Matériaux -- Propriétés barrières Polyuréthanes Revêtements protecteurs Smectite Index. décimale : 667.9 Revêtements et enduits Résumé : Hybrid organic/inorganic coatings provide effective barriers to gas transmission and therefore find utility in a variety of application areas, including surface treatment of foams for thermal insulation purposes. Blends of aqueous latexes with select smectite clays are particularly attractive, in that the efficient formation of layered interconnecting networks occurs upon drying. The plate-like structure of clays enables this behavior at relatively low volumetric content of inorganic material. A variety of both natural and synthetically derived high purity clays are evaluated for their ability to form low permeability films, with effects of loading, aspect ratio, and refinement technique described. Note de contenu : - EXPERIMENTAL : Materials - Coating characterization - DISCUSSION : Clay types - Clay loadings - Refinement technique - Polymeric coating carrier DOI : 10.1007/s11998-015-9726-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9726-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25387 [article]

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Effect of carbon nanotubes on electrical and mechanical properties of multiwalled carbon nanotubes/epoxy coatings / M. Zabet in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 191-200 Titre : Effect of carbon nanotubes on electrical and mechanical properties of multiwalled carbon nanotubes/epoxy coatings Type de document : texte imprimé Auteurs : M. Zabet, Auteur ; S. Moradian, Auteur ; Z. Ranjbar, Auteur ; N. Zanganeh, Auteur Année de publication : 2016 Article en page(s) : p. 191-200 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermomécanique dynamique Conduction électrique Dépôt électrolytique Epoxydes Microscopie électronique à balayage Nanotubes de carbone à parois multiples Un nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets : - le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ; - le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier. Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : In the present study, attempts were made to enhance conductivity of electrocoats (based on epoxy amine adduct) containing NH2-multiwalled carbon nanotubes (MWCNTs). The weight percent of incorporated MWCNTS into the electrocoat matrix varied in the range of 0.6–3.6 wt% to obtain a series of electrocoatings. These were then applied on steel substrates by a cathodic electrodeposition technique. Electrocoated films were characterized utilizing scanning electron microscopy and optical microscopy. The results illustrated that electrical conductivity was enhanced by increasing of the MWCNT load. At the percolation threshold, throwing power was dropped while the recoating ability was enhanced. Mechanical behavior of nanocomposites containing MWCNTs in the range of 0–2.8 wt% was investigated by dynamic mechanical thermal analysis (DMTA) and nanoindentation test methods. DMTA analysis revealed that the width of tan δ was increased by the addition of nanotubes up to 2.8 (wt%). Also, the results obtained from the nanoindentation test showed that the elastic modulus and hardness of the nanocomposites were decreased by the addition of MWCNTs. Note de contenu : - EXPERIMENTAL : Materials and sample preparation - Electrodeposition procedures - Instrumentation - RESULTS AND DISCUSSION : Electrodeposition of samples - Conductivity of coated films containing MWCNT - Morphological properties of the films containing MWCNT - Throwing power measurement - Mechanical properties of MWCNT/epoxy coatings DOI : 10.1007/s11998-015-9723-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9723-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25388 [article]

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Optimized design of moth eye antireflection structure for organic photovoltaics / Shigeru Kubota in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 201-210 Titre : Optimized design of moth eye antireflection structure for organic photovoltaics Type de document : texte imprimé Auteurs : Shigeru Kubota, Auteur ; Kensaku Kanomata, Auteur ; Bashir Ahmmad, Auteur ; Jun Mizuno, Auteur ; Fumihiko Hirose, Auteur Année de publication : 2016 Article en page(s) : p. 201-210 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Différences finies dans le domaine temporel FDTD est l'acronyme de l'expression anglaise Finite Difference Time Domain. C'est une méthode de calcul de différences finies dans le domaine temporel, qui permet de résoudre des équations différentielles dépendantes du temps. Cette méthode est couramment utilisée en électromagnétisme pour résoudre les équations de Maxwell. Cette méthode a été proposée par Kane S. Yee en 1966. Photopiles Revêtement antireflet Index. décimale : 667.9 Revêtements et enduits Résumé : To improve the power conversion efficacy of organic photovoltaics (OPVs), it is required to design antireflection structures that could realize efficient and broadband light trapping. In this article, we perform global optimization of the textured pattern of moth eye antireflection surfaces to maximize the short-circuit current density (J SC) of OPVs with a poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)-based bulk heterojunction. We introduce an optimization algorithm consisting of two steps: in the first step, the simple grid search is conducted to roughly estimate a globally optimal solution, while in the second step, the Hooke and Jeeves pattern search is executed to refine the solution. By combining the optimization algorithm with the optical simulation based on the finite-difference time-domain method, we find the optimal period and height of moth eye array with which the level of J SC can be increased by 9.05% in the P3HT:PCBM-based organic solar cell. We also demonstrate that the optimized moth eye structure can significantly modify the light path at a long wavelength range to strengthen the electric field intensity and enhance energy absorption within the active layer. Note de contenu : - EXPERIMENTAL : Optical model - FDTD simulation - Characteristic matrix-based analysis - Optimization algorithm - RESULTS AND DISCUSSION : FDTD simulation in the presence of thick glass substrate - Optimization of moth eye texture - APPENDIX : Method for removing artificial interférence effect from FDTD response DOI : 10.1007/s11998-015-9745-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9745-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25389 [article]

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