Dépouillements

Drying and cracking of soft latex coatings / Christine C. Roberts in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 441-451 Titre : Drying and cracking of soft latex coatings Type de document : texte imprimé Auteurs : Christine C. Roberts, Auteur ; Lorraine F. Francis, Auteur Année de publication : 2013 Article en page(s) : p. 441-451 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agrégats (chimie) Couches minces Latex Microscopie électronique à balayage Particules (matières) Revêtement -- Séchage:Peinture -- Séchage Revêtements -- Fissuration:Peinture -- Fissuration Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 667.9 Revêtements et enduits Résumé : The minimum film formation temperature (MFFT) is the minimum drying temperature needed for a latex coating to coalesce into an optically clear, dense crack-free film. To better understand the interplay of forces near this critical temperature, cryogenic scanning electron microscopy (cryoSEM) was used to track the latex particle deformation and water migration in coatings dried at temperatures just above and below the MFFT. Although the latex particles completely coalesced at both temperatures by the end of the drying process, it was discovered that particle deformation during the early drying stages was drastically different. Below the MFFT, cracks initiated just as menisci began to recede into the packing of consolidated particles, whereas above the MFFT, partial particle deformation occurred before menisci entered the coating and cracks were not observed. The spacing between cracks measured in coatings dried at varying temperatures decreased with decreasing drying temperature near the MFFT, whereas it was independent of temperature below a critical temperature. Finally, the addition of small amounts of silica aggregates was found to lessen the cracking of latex coatings near the MFFT without adversely affecting their optical clarity. Note de contenu : - METHODS AND MATERIALS : Materials - Cryogenic scanning electron microscopy - MFFT and crack spacing measurements - Contact angle measurements - RESULTS : Macroscopic appearance - Microstructure development DOI : 10.1007/s11998-012-9425-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9425-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19094 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Aziridine cure of acrylic colloidal unimolecular polymers (CUPs) / Jigar K. Mistry in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 453-463 Titre : Aziridine cure of acrylic colloidal unimolecular polymers (CUPs) Type de document : texte imprimé Auteurs : Jigar K. Mistry, Auteur ; Michael R. Van De Mark, Auteur Année de publication : 2013 Article en page(s) : p. 453-463 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Aziridine L'aziridine (n.f.) ou azacyclopropane est le composé organique cyclique de formule brute C2H5N. Elle est aussi le composé parent des aziridines et du groupe fonctionnel qui correspond à un hétérocycle à trois côtés composé d'une amine et de deux groupes méthylène. Brillance (optique) Colloides Dureté (matériaux) Polyacryliques Polymères -- Synthèse Polymères unimoléculaires colloïdaux Résistance à l'abrasion Résistance au chocs Résistance chimique Réticulation (polymérisation) Revêtements:Peinture solvants Souplesse (mécanique) Tests d'efficacité Vernis Index. décimale : 667.9 Revêtements et enduits Résumé : Polymers were synthesized with a 1:7 or 1:8 ratio of acrylic acid to acrylate monomers to produce an acid-rich resin. The polymers were water-reduced and solvent-stripped to produce colloidal unimolecular polymers (CUPs). These particles are typically 3–9 nm in diameter, depending upon the molecular weight, and have different rheological behavior from micelles, polyelectrolytes, fullerenes, and latex particles, due to their charged surface and large surface areas. They were then formulated into ambient cure clearcoatings with aziridine crosslinking. These aziridine-cured acrylic CUPs were either solvent-free or very low VOC. The coatings were evaluated for their MEK resistance, adhesion, hardness, gloss, flexibility, wet adhesion, and abrasion and impact resistance properties. Note de contenu : - EXPERIMENTAL : Materials - Polymer syntheses - Characterization of polymers synthesized - Water reduction of polymers to form CUPs - Characterization of CUPs - CUP coatings - Testing of the CUP clearcoats - RESULTS AND DISCUSSION : Polymer synthesis and characterization - Aziridine-cured CUP coatings DOI : 10.1007/s11998-013-9489-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9489-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19095 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Facile fabrication of water repellent coatings from vinyl functionalized SiO2 spheres / Qianqian Shang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 465-473 Titre : Facile fabrication of water repellent coatings from vinyl functionalized SiO2 spheres Type de document : texte imprimé Auteurs : Qianqian Shang, Auteur ; Mengyu Wang, Auteur ; Hu Liu, Auteur ; Lijing Gao, Auteur ; Guomin Xiao, Auteur Année de publication : 2013 Article en page(s) : p. 465-473 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcool polyvinylique Angle de contact Dioxyde de silicium Hydrophobie Imperméabilisation Microsphères Revêtements:Peinture Sol-gel, Procédé Surfaces fonctionnelles Index. décimale : 667.9 Revêtements et enduits Résumé : Water repellent SiO2 particulate coatings were prepared by a one-step introduction of vinyl groups on the coating surface. Rough surface structure and low surface energy could be directly obtained. Vinyl functionalized SiO2 (vinyl-SiO2) spheres with average diameter of 500 nm were first synthesized by a sol–gel method in aqueous solution using vinyltriethoxysilane as the precursor. The multilayer SiO2 coating fabricated by dip-coating method was highly hydrophobic with a water contact angle of 145.7° ± 2.3°. The superhydrophobic SiO2 coating with a water contact angle up to 158° ± 1.7° was prepared by spraying an alcohol mixture suspension of the vinyl-SiO2 spheres on the glass substrate. In addition, the superhydrophobic SiO2 coating demonstrated good stability under the acidic condition. However, it lost its hydrophobicity above 200°C because of the oxidation and degradation of vinyl groups. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of monodisperse vinyl-SiO2 spheres - Preparation of SiO2 coatings - Characterization - RESULTS AND DISCUSSION : Morphology and structural characterization of vinyl-SiO2 spheres - Hydrophobic properties of the multilayers SiO2 coatings - Superhydrophobic properties of the SiO2 coating - Wetting stability of the superhydrophobic SiO2 coating - Thermal stability of the superhydrophobic SiO2 DOI : 10.1007/s11998-012-9465-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9465-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19096 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Treatment of Mg powder with carbonic acid and the effect of treatment variables and treated Mg ratios on coating performance in salt spray tests / Tacibaht Turel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 475-483 Titre : Treatment of Mg powder with carbonic acid and the effect of treatment variables and treated Mg ratios on coating performance in salt spray tests Type de document : texte imprimé Auteurs : Tacibaht Turel, Auteur ; Shashi S. Pathak, Auteur ; Sharathkumar K. Mendon, Auteur ; Michael D. Blanton, Auteur ; James W. Rawlins, Auteur Année de publication : 2013 Article en page(s) : p. 475-483 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Essais de brouillard salin Magnésium Le magnésium est l'élément chimique de numéro atomique 12, de symbole Mg. Le magnésium est un métal alcalino-terreux. Il s’agit du neuvième élément le plus abondant de l'univers . Il est le produit, dans de grandes étoiles vieillissantes, de l'addition séquentielle de trois noyaux d'hélium à un noyau carbo. Lorsque de telles étoiles explosent en tant que supernovas, une grande partie du magnésium est expulsé dans le milieu interstellaire où il peut se recycler dans de nouveaux systèmes stellaires. Le magnésium est le huitième élément le plus abondant de la croûte terrestreet le quatrième élément le plus commun de la Terre (après le fer, l'oxygène et le silicium), constituant 13 % de la masse de la planète et une grande partie du manteau de la planète. C'est le troisième élément le plus abondant dissous dans l'eau de mer, après le sodium et le chlore. Les atomes de magnésium existent dans la nature uniquement sous forme de combinaisons avec d'autres éléments, où il présente invariablement l'état d'oxydation +2. L'élément pur est produit artificiellement par réduction ou électrolyse. Il est hautement réactif en poudre et en copeaux mais, laissé à l'air libre, il se revêt rapidement d'une mince couche d'oxyde étanche réduisant sa réactivité (passivation par oxydation). Le métal pur brûle aisément sous certaines conditions (en produisant une lumière brillante, blanche, éblouissante caractéristique). En mécanique il est utilisé principalement comme composant dans les alliages d'aluminium-magnésium (parfois appelés magnalium). Le magnésium est moins dense que l'aluminium et l'alliage est apprécié pour sa légèreté et sa résistance plus grande (mécanique et chimique). (Wikipedia) Poudres Primaire (revêtement) Index. décimale : 667.9 Revêtements et enduits Résumé : Magnesium-rich primers (MgRPs) are known to exhibit excellent corrosion resistance during natural weathering due to the formation of a controlled and complex cathodic protective layer which includes but is not limited to changing combinations of magnesium metal, magnesium hydroxide, and magnesium carbonate each during film formation, cure, and environmental exposure. Pretreating Mg powder with carbonic acid before incorporation into coatings has been shown to enhance the corrosion resistance of MgRPs. In an earlier study, the conditions for treating Mg powder and the effects of variables such as time and the order of addition were evaluated to determine optimized treatment conditions. In this study, the treatment process was analyzed further to better understand the nature of the carbonation process and the effect of treatment variables on the overall corrosion protection process. Coatings prepared with different ratios of treated and untreated Mg were evaluated via ASTM B117 salt fog exposure to determine the optimized ratio of treated and untreated pigments for maximum corrosion protection. Note de contenu : - MATERIALS AND EXPERIMENTAL METHOD : Materials - Treatment of Mg powder - Preparation and application of Mg-rich primer - Preparation of test samples - Experimental method - Characterization - RESULTS AND DISCUSSION : Understanding the treatment process - Salt for testing DOI : 10.1007/s11998-012-9461-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9461-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19097 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Process limits in two-layer reverse roll transfer / M. Sasaki in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 485-492 Titre : Process limits in two-layer reverse roll transfer Type de document : texte imprimé Auteurs : M. Sasaki, Auteur ; W. J. Suszynski, Auteur ; M. S. Carvalho, Auteur ; Lorraine F. Francis, Auteur Année de publication : 2013 Article en page(s) : p. 485-492 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Défauts Enduction au rouleau Revêtements multicouches Index. décimale : 667.9 Revêtements et enduits Résumé : Reverse roll coating in which a thin single layer of liquid is applied onto a substrate has been used in industry for decades and has been extensively analyzed in the literature. Modern coatings, however, are often composed of more than one layer to improve the product performance and to reduce the manufacturing cost. Premetered methods such as slot, slide, and curtain coatings are typically used to produce such multilayer coatings. If the caliper of the substrate to be coated is not constant, then the coating gap and consequently the final film thickness deposited on the web will also be nonuniform. In this study, we focused on the use of reverse roll technique with slot die liquid delivery system to produce a uniform thin two-layer coating. The use of this coating technique to produce such a coating has not been previously explored. The liquid film surface as it is transferred from a rigid steel roll to a deformable urethane-covered roll was visualized to find out how the uniformity of the two-layer coating is affected by the speed ratio between two rolls, layers’ wet thicknesses, and liquid viscosities. The effect of these parameters on the ribbing frequency and amplitude was also investigated. The results show that in the two-layer coating, as in the single layer reverse transfer, there is a critical web speed above which ribbing occurs. The critical speed is determined by the bottom layer viscosity. DOI : 10.1007/s11998-012-9444-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9444-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19098 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Formulation and study of corrosion prevention behavior of epoxy cerium nitrate-montmorillonite nanocomposite coated carbon steel / E. Darmiani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 493-502 Titre : Formulation and study of corrosion prevention behavior of epoxy cerium nitrate-montmorillonite nanocomposite coated carbon steel Type de document : texte imprimé Auteurs : E. Darmiani, Auteur ; I. Danaee, Auteur ; G. R. Rashed, Auteur ; Davood Zaarei, Auteur Année de publication : 2013 Article en page(s) : p. 493-502 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. Anticorrosifs Anticorrosion Epoxydes Matériaux hybrides Métaux -- Revêtements protecteurs Montmorillonite Nanoparticules Nitrate de cérium Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : Nanocomposite coatings which were applied on carbon steel panels based on epoxy cerium nitrate–montmorillonite (MMT) were synthesized and formulated. Nanoparticles were incorporated into epoxy resin by mechanical and sonication processes. The state of dispersion, dissolution, and incorporation were characterized by optical microscopy, sedimentation tests, X-ray diffraction, and transmission electron microscopy. To investigate anticorrosive properties of nanocomposite coatings, electrochemical impedance spectroscopy and salt spray tests were employed. The experimental results showed that epoxy cerium nitrate–MMT nanocomposite coatings were superior to the neat epoxy in corrosion protection effects. In addition, it was observed that the corrosion protection of nanocomposite coatings was improved as the clay loading was increased up to 4–2 wt% cerium nitrate. Note de contenu : - EXPERIMENTAL : Materials - Preparation of nanocomposites - Sample preparation - Laboratory - RESULTS AND DISCUSSION : Optical microscopy results - Stability - XRD and TEM analysis - Electrochemical impedance spectroscopy - Salt spray test DOI : 10.1007/s11998-012-9463-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9463-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19099 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Mixed powder coating film using thermoplastic polyester and its alkaline resistance / Yukitoshi Takeshit in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 503-514 Titre : Mixed powder coating film using thermoplastic polyester and its alkaline resistance Type de document : texte imprimé Auteurs : Yukitoshi Takeshit, Auteur ; Takuya Kamisho, Auteur ; Seizo Sakata, Auteur ; Takashi Sawada, Auteur ; Yoshikazu Watanuki, Auteur ; Ryuichi Nishio, Auteur ; Toshinobu Ueda, Auteur Année de publication : 2013 Article en page(s) : p. 503-514 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bases (chimie) Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Polyesters Polyéthylène téréphtalate Polyvinyle butyrale Résistance chimique Revêtements poudre:Peinture poudre Index. décimale : 667.9 Revêtements et enduits Résumé : To improve alkaline resistance, a newly mixed powder coating film using thermoplastic polyethylene terephthalate (PET) was investigated. Two kinds of polyvinyl butyral (PVB) and two kinds of polyamide (PA) were chosen as the secondary polymer. The melting temperatures (T ms) of these materials were lower than that of primary PET polymer so the mixed powder coating was able to form a dual phase film through a fluidized bed coating process. Microscope and Fourier transform infrared spectroscopy (FTIR) observations revealed that the dual phase structure was indeed successfully formed and there was a secondary layer over the entire surface area of the film. This mixed powder coating film significantly enhanced the alkaline resistance to an environment filled with NaOH solution at 40°C in which a secondary material would be effective in protecting the film. With regard to both alkaline resistance and film formability, PET/PVB was superior to the PET/PA mixture. Note de contenu : - EXPERIMENTAL : Materials - Preparation of mixed powder coating film - Evaluation - RESULTS AND DISCUSSION : Combination of PET/PVB-1 - Combination of PET/PVB-2 - Combination of PET/PA-1 - Combination of PET/PA-2 DOI : 10.1007/s11998-013-9473-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9473-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19100 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Monomer-grafted sucrose ester resins / Thomas J. Nelson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 515-525 Titre : Monomer-grafted sucrose ester resins Type de document : texte imprimé Auteurs : Thomas J. Nelson, Auteur ; Dean C. Webster, Auteur Année de publication : 2013 Article en page(s) : p. 515-525 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides gras Esters -- Synthèse Esters de sucres Greffage (chimie) Monomères Polyalkydes Polystyrène Revêtements:Peinture Saccharose Soja et constituants Styrène Index. décimale : 667.9 Revêtements et enduits Résumé : Styrenated sucrose esters of soybean fatty acids were successfully synthesized and the coatings properties were found to be comparable to a commercial styrenated alkyd while having lower volatile organic content at comparable solids content. A series of reactions were performed which varied the percent styrene incorporated into the resin. The dry time was significantly reduced as the styrene content increased which was a result of having more hard polystyrene chain segments. Tack-free times of ?30 min were observed for resins containing high amounts of polystyrene. Nuclear magnetic resonance spectroscopy indicated residual bisallylic hydrogens were present which are capable of further crosslinking through autoxidation after film application. The addition of cobalt and zinc driers reduced the drying time which indicates that autoxidation is occurring. Furthermore, the styrenation reaction was extended to make water-reducible resins. These resins were crosslinked with a melamine–formaldehyde resin resulting in biobased thermosets having high solvent resistance, high hardness while retaining good flexibility. Note de contenu : - EXPERIMENTAL : Raw materials - Synthesis of styrenated partially esterified sucrose soyate - Synthesis of water-reducible styrenated partially esterified sucrose soyate - Coating formulation - Drying-time determination - Brookfield viscometry - Raman spectroscopy - 1H NMR spectroscopy - Coating characterization - Differential scanning calorimetry (DSC) - Gel permeation chromatography (GPC) - RESULTS AND DISCUSSION : Styrenation reaction - Coatings properties - Estimation of VOC - Water-reducible resins and baked coatings DOI : 10.1007/s11998-013-9486-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9486-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19101 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Superhydrophobic antireflective coating with high transmittance / Shing-Dar Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 527-535 Titre : Superhydrophobic antireflective coating with high transmittance Type de document : texte imprimé Auteurs : Shing-Dar Wang, Auteur ; Yung-Yeh Shu, Auteur Année de publication : 2013 Article en page(s) : p. 527-535 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Eau Hydrophobie Revêtement antireflet:Peinture antireflet Sol-gel, Procédé Surfaces fonctionnelles Index. décimale : 667.9 Revêtements et enduits Résumé : The aim of this study is to fabricate a superhydrophobic antireflective (AR) coating that can be deposited on the covering of a solar cell system. First, AR coatings were synthesized on glass substrates with an average transmittance over 96% by layer-by-layer deposition of polyelectrolyte. Superhydrophobic sol gel was prepared by hydrolyzing tetraethoxysilane and then reacting it with hexamethyldisilazane. The sol gel, aged at 20°C for 96 h, was used to spin-coat a superhydrophobic film with a water contact angle of 163° and a transmittance of ~91%. The superhydrophobic sol gel was spin-coated on the top of an AR coating to form a superhydrophobic AR coating on a glass substrate. The average transmittance, advancing contact angle, and contact angle hysteresis of the superhydrophobic AR coating, which was spin-coated from sol gel aged for 96 h or 168 h, were 94.5 ± 0.7%, 154.0° ± 1.5°, and 15.4° ± 0.3° or 96.4 ± 0.2%, 158.4° ± 4.4°, and 1.8° ± 0.3°, respectively. Strategies for obtaining a superhydrophobic AR coating are discussed herein. Note de contenu : - MATERIALS AND METHODS : Synthesis of an AR coating on glass substrate - Preparation of superhydrophobic sol gel - Fabrication of superhydrophobic AR coating on glass substrate - Characterization of superhydrophobic AR coatings - RESULTS AND DISCUSSION : AR coatings - Superhydrophobic coatings - Superhydrophobic AR coatings - Strategy of obtaining a superhydrophobic AR coating - The impact resistance of the superhydrophobic AR coating DOI : 10.1007/s11998-012-9468-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9468-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19102 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Utilizing Taguchi design of experiment to study the surface treatment of a nanosilica with an acrylic silane coupling agent and revealing the dispersibility of particles in a urethane acrylate resin / Y. Zamani Ketek Lahijani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 537-547 Titre : Utilizing Taguchi design of experiment to study the surface treatment of a nanosilica with an acrylic silane coupling agent and revealing the dispersibility of particles in a urethane acrylate resin Type de document : texte imprimé Auteurs : Y. Zamani Ketek Lahijani, Auteur ; Mohsen Mohseni, Auteur ; S. Bastani, Auteur Année de publication : 2013 Article en page(s) : p. 537-547 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère uréthane acrylate Dispersions et suspensions Fourier, Spectroscopie infrarouge à transformée de Hydrolyse Nanoparticules pH Réaction de couplage Silanes Silice La 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. Taguchi, Méthodes de (Contrôle de qualité) Taille des particules Thermogravimétrie Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : This work aims at investigating the dispersibility of a modified hydrophilic nanosilica using methacryloxy propyltrimethoxysilane (MPTMS) in an organic phase, which contains UV-curable urethane acrylate oligomers and monomers with different functionalities. Through a Taguchi design of experiment, the impacts of influencing parameters such as silane coupling agent to silica ratio, hydrolysis ratio as well as treating bath pH were investigated. The optimum condition in which the maximum percentage of modification occurred was observed at higher stoichiometric levels of silane:silica ratio and alkaline pH conditions. Furthermore, statistical analysis demonstrated that hydrolysis ratio was not very significant. Low amounts of turbidity of prepared hybrid coatings indicated that modified particles with higher grafting contents had better dispersion stability in the acrylate resin. Note de contenu : - Experimental - Particle characterization - Preparation of particle-loaded films - Results and discussion - Effect of treatment pH - Effects of silane concentration and hydrolysis - Particle size - Structural studies using FTIR analysis - TGA particles - Elemental analysis of the particles - Performance of particles in urethane acrylate matrix DOI : 10.1007/s11998-013-9471-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9471-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19103 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Improving hydrophobicity on polyurethane-based synthetic leather through plasma polymerization for easy care effect / Burcak Karaguzel Kayaoglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 549-588 Titre : Improving hydrophobicity on polyurethane-based synthetic leather through plasma polymerization for easy care effect Type de document : texte imprimé Auteurs : Burcak Karaguzel Kayaoglu, Auteur ; Emre Ozturk, Auteur ; F. Seniha Güner, Auteur ; Tamer Uyar, Auteur Année de publication : 2013 Article en page(s) : p. 549-588 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Cuir synthétique Hydrophobie Polymérisation sous plasma Polyuréthanes Surfaces -- Nettoyage Index. décimale : 667.9 Revêtements et enduits Résumé : This study reports on the deposition of a hydrophobic coating on polyurethane (PU)-based synthetic leather through a plasma polymerization method and investigates the hydrophobic behavior of the plasma-coated substrate. The silicon compound of hexamethyldisiloxane (HMDSO), inactive gas argon (Ar), and toluene were used to impart surface hydrophobicity to a PU-based substrate. Surface hydrophobicity was analyzed by water contact angle measurements. Surface hydrophobicity was increased by deposition of compositions of 100% HMDSO, 3:1 HMDSO/toluene, and 1:1 HMDSO/toluene. Optimum conditions of 40 W, 30 s plasma treatment resulted in essentially the same initial contact angle results of approximately 100° for all three treatment compositions. The initial water contact angle for untreated material was about 73°. A water droplet took 1800 s to spread out on the plasma-treated sample after it had been placed on the sample surface. An increase in plasma power also led to a decrease in contact angle, which may be attributed to oxidization of HMDSO during plasma deposition. XPS analysis showed that plasma polymerization of HMDSO/toluene compositions led to a significant increase in atomic percentage of Si compound responsible for the hydrophobic surface. The easy clean results for the treated and untreated PU-based synthetic leather samples clearly showed that the remaining stain on the plasma-polymerized sample was less than that of untreated sample. The plasma-formed coating was both hydrophobic and formed a physical barrier against water and stain. Note de contenu : - EXPERIMENTAL : Plasma treatment - Contact angle measurements - Easy clean property - Scanning electron microscopy (SEM) - X-ray photoelectron spectroscopy (XPS) - RESULTS AND DISCUSSION : Water contact angle measurements - Surface roughness - X-ray photoelectron spectroscopy (XPS) DOI : 10.1007/s11998-013-9470-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9470-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19104 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Thermally curable benzoxazine-modified vegetable oil as a coating material / Can Yildirim in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 559-569 Titre : Thermally curable benzoxazine-modified vegetable oil as a coating material Type de document : texte imprimé Auteurs : Can Yildirim, Auteur ; A. Tuncer Erciyes, Auteur Année de publication : 2013 Article en page(s) : p. 559-569 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Benzoxazine Huiles et graisses végétales Revêtements:Peinture Thermodurcissables Triglycérides Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, a new synthetic approach for the modification of partial glycerides (PG) obtained from sunflower oil with thermally curable benzoxazine units and its potential use as a coating material are described. For this purpose, hydroxyl-containing benzoxazine monomer was first prepared by conventional ring-forming reaction of phenol with paraformaldehyde in the presence of 6-amino-1-hexanol. The subsequent urethane reaction between PG and the benzoxazine monomer using toluene diisocyanate yields corresponding modified oil. The structures of the intermediates, and the modified triglycerides are confirmed by FTIR and 1H NMR spectral analysis. Thermally activated curing behaviors of the precursor and the modified oil in the absence of any catalyst were studied by differential scanning calorimetry. Thermal and film properties of the cured products were also investigated. Note de contenu : - Materials - Characterizations - Preparation of hydroxyl-containing benzoxazine monomer (Bz-OH) - Synthesis of partial glycerides (PG) - Preparation of enriched PG (PGE) - Preparation of benzoxazine-modified oil (Bz-PG/Bz-PGE) - Classical urethane oil (CUO) synthesis DOI : 10.1007/s11998-013-9472-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9472-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19105 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Preparation and characterization of poly(trifluoropropylmethyl)siloxane-block-polyurethane-urea elastomers / Zhendong Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 571-578 Titre : Preparation and characterization of poly(trifluoropropylmethyl)siloxane-block-polyurethane-urea elastomers Type de document : texte imprimé Auteurs : Zhendong Shi, Auteur Année de publication : 2013 Article en page(s) : p. 571-578 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Copolymère uréthane-urée Copolymères séquencés Elastomères Polytrifluoropropylméthylsiloxane Réticulation à l'humidité Séparation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : A series of poly(trifluoropropylmethyl)-siloxane-block-polyurethane-urea (FSPUU) films is prepared through moisture curing based on a three-step process. First, prepolymers are produced from poly(tetramethylene oxide) and toluenediisocyanate. Second, the prepolymers are chain-extended by ?,?-bis(3-aminopropyldiethoxylsilane) poly(trifluoropropylmethyl)siloxane (APFS). Third, another chain extension is performed using 3,3?-dichliride-4,4?-diaminodiphenylmethane (DDDPM). The FSPUU films are characterized by Fourier transform IR spectroscopy, differential scanning calorimetry, dynamic mechanical analysis, scanning electron microscopy, and mechanical testing. The effects of the APFS amount on the microstructure of the materials are also investigated. The results show that the material with approximately 15 wt% APFS exhibits high phase mixing. The materials display strong phase separations and weak tensile strengths when the APFS amounts range from 21.6 to 26.8 wt%. In particular, due to the incorporation of DDDPM in FSPUU, this segment increases the bonding of the different phases when the APFS amount is in the range of 35.6–44.5 wt%. The APFS segment is involved in compatibilizing the different phases in the materials. The tensile strength of the FSPUU films containing DDDPM can reach or surpass that of polyurethane. The copolymers may also have a functional application in coatings and adhesives. Note de contenu : - EXPERIMENTAL : Materials - APFS synthesis - Preparation of FSPUU elastomers - Characterizations - RESULTS AND DISCUSSION : Preparation of FSPUU elastomers - FTIR spectra of FSPUU films - SEM analysis - DSC analysis - Dynamic mechanical behavior - Mechanical properties of FSPUU films DOI : 10.1007/s11998-012-9469-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9469-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19106 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Quantitative method for evaluating fingernail induced mar damage of coatings / Jeff Anderson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 579-588 Titre : Quantitative method for evaluating fingernail induced mar damage of coatings Type de document : texte imprimé Auteurs : Jeff Anderson, Auteur ; Matthew Brown, Auteur ; Charles Kan, Auteur ; Nanjundiah Kumar, Auteur ; Vivek Kalihari, Auteur Année de publication : 2013 Article en page(s) : p. 579-588 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ongles Résistance à l'abrasion Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : A traditional method of coating qualification, known as fingernail mar resistance, historically has been practiced in industry where the back of a fingernail is “flicked” across a coating surface. Any resulting permanent mark from this qualitative analysis is deemed a failure. Lack of quantitative analysis and control over experimental parameters in this type of test limits its utility as an analytical test. Fundamental understanding of this specific type of mar damage is hindered, and research efforts to find unique solutions based on changes in polymer structure are frustrated by the binary response of the test. In an attempt to rectify the situation, a high speed mar tester was developed to mimic and quantify the effects of the fingernail flick test. The work described in this report demonstrates the applicability of this tester to produce similar damage to that of the fingernail test. In addition, a quantitative method enabling differentiation of the degree of mar damage of different coatings is described. Finally, the method is demonstrated by differentiating mar resistance of coatings that show similar qualitative results in fingernail flick testing. Note de contenu : - EXPERIMENTAL PROCEDURES : Stylus - Velocity of stylus - Coating selection and preparation - Surface profile - Image capture - Image analysis - Visual analysis - Dynamic friction - Evaluation of fingernail mar - RESULTS AND DISCUSSION : Surface profile of mar and scratch damage - Visual evaluation DOI : 10.1007/s11998-013-9478-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9478-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19107 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible