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Drag resistance of ship hulls : effects of surface roughness of newly applied fouling control coatings, coating water absorption, and welding seams / Xueting Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 654-669 Titre : Drag resistance of ship hulls : effects of surface roughness of newly applied fouling control coatings, coating water absorption, and welding seams Type de document : texte imprimé Auteurs : Xueting Wang, Auteur ; Stefan Møller Olsen, Auteur ; Eduardo Andres Martinez, Auteur ; Kenneth Nørager Olsen, Auteur ; Søren Kiil, Auteur Année de publication : 2018 Article en page(s) : p. 654-669 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Humidité -- Absorption:Eau -- Absorption Résistance au glissement Revêtements antisalissures:Peinture antisalissures Soudures Index. décimale : 667.9 Revêtements et enduits Résumé : Fouling control coatings (FCCs) and irregularities (e.g., welding seams) on ship hull surfaces have significant effects on the overall drag performance of ships. In this work, skin frictions of four newly applied FCCs were compared using a pilot-scale rotary setup. Particular attention was given to the effects of coating water absorption on skin friction. Furthermore, to investigate the effects of welding seam height and density (number of welding seams per five meters of ship side) on drag resistance, a new flexible rotor was designed and used for experimentation. It was found, under the conditions selected, that a so-called fouling release (FR) coating caused approximately 5.6% less skin friction (torque) over time than traditional biocide-based antifouling (AF) coatings at a tangential speed of 12 knots. Furthermore, results of immersion experiments and supporting “standard” water absorption experiments showed that water absorption of the FR coating did not result in any significant impacts on skin friction. On the other hand, water absorption was found to actually lower the skin friction of AF coatings. This may be attributed to a smoothening of the coating surface. The effects of welding seam height and density on drag resistance were found to be substantial when welding seam height is above 5 mm, especially at high tangential speeds (above 15 knots). Using an interpolation approach, the pilot-scale welding seam drag data could be used to estimate the drag resistance at approximated full-scale conditions, equivalent to about one welding seam per five meters of ship side. It was shown, in this case, that the contribution of welding seams to ship skin friction could very well be less significant than those of FCCs when the welding seam height is below 5 mm, a representative value for full-scale welding seam height. Note de contenu : - EXPERIMENTAL SETUP : Flexible cylinder - MATERIALS AND EXPERIMENTAL PROCEDURES : Seawater immersion experiments - "Standard" water absorption experiments - Welding seam experiments - RESULTS AND DISCUSSION : Seawater immersion experiments and "standard" water absorption experiments - Welding seam experiments - Comparison of effects of coatings and welding seams on drag resistance DOI : 10.1007/s11998-018-0054-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0054-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30844 [article]

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Monte Carlo simulation of polymer syntheses: a useful tool to judge the REACH and OECD polymer status / Henk J. W. Van Den Haak in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 671-678 Titre : Monte Carlo simulation of polymer syntheses: a useful tool to judge the REACH and OECD polymer status Type de document : texte imprimé Auteurs : Henk J. W. Van Den Haak, Auteur Année de publication : 2018 Article en page(s) : p. 671-678 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie industrielle -- Législation Chromatographie sur gel Monte-Carlo, Méthode de Polymères -- Synthèse Simulation par ordinateur Index. décimale : 667.9 Revêtements et enduits Résumé : The REACH or OECD polymer definition requires a certain chain length, rather than a molecular weight. This makes it very difficult to decide from gel permeation chromatography (GPC) alone whether a substance complies with the REACH polymer definition. Therefore, in parallel to the real in vitro syntheses, we simulated the preparation of polycondensation and polyaddition resins by means of well-known Monte Carlo methods. The output of these simulations (basically a list of all the molecules formed, their molecular weights, and their relative quantities) was used to simulate a GPC. The simulation parameters (reaction types and relative reaction rates) were adapted until a good match between the measured and the simulated GPC was obtained. The simulation was then considered trustworthy. This appeared to be a strong tool to judge if a product is a polymer according to REACH, EPA, or emerging worldwide legislation. Note de contenu : - Simulation of polymerizations - Simulation of the GPC - REACH - EPA DOI : 10.1007/s11998-018-0043-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0043-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30845 [article]

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Deposition of a PMMA coating with an atmospheric pressure plasma jet / S. Van Vrekhem in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 679-690 Titre : Deposition of a PMMA coating with an atmospheric pressure plasma jet Type de document : texte imprimé Auteurs : S. Van Vrekhem, Auteur ; R. Morent, Auteur ; N. de Geyter, Auteur Année de publication : 2018 Article en page(s) : p. 679-690 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Méthacrylate de méthyle Plasma à pression atmosphérique Un plasma à pression atmosphérique (ou plasma à PA ou plasma froid) est le nom donné à une catégorie spéciale de plasma pour lequel la pression approche celle de l’atmosphère. Le plasma à pression atmosphérique marque une nette différence avec le plasma basse et haute pression. En effet, contrairement à ces derniers aucune enceinte de traitement n'est nécessaire. Ce type de plasma peut donc être utilisé directement sur ligne de production, évitant ainsi l'utilisation de vide qui est extrêmement onéreuse. Polymérisation sous plasma Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : Atmospheric pressure plasma jet polymerization of methyl methacrylate (MMA) was performed in order to deposit a PMMA-like coating on ultrahigh molecular weight polyethylene (UHMWPE). This study is a first step in the transfer from MMA plasma polymerization experiments previously performed in a dielectric barrier discharge (DBD) reactor to a newly designed atmospheric pressure plasma jet. In this novel plasma setup, the substrate is not directly exposed to the plasma region, but placed in the plasma jet afterglow. The effect of several plasma jet process parameters on the coating properties was investigated using different surface characterization techniques such as XPS, FTIR, AFM, and OPS. Results show that the stationary deposition of PMMA-like thin films results in a radial gradient in surface chemistry, surface morphology, and coating thickness. Additionally, the coating properties were found to significantly depend on the monomer-containing gas flow rate. This observation is also confirmed by CFD modeling, which shows that the monomer-containing gas flow rate strongly influences the gas flow pattern of the plasma afterglow and therefore the final properties of the deposited PMMA-like film. Note de contenu : - MATERIALS AND METHODS : Experimental setup - Materials - Surface characterization - Coatings thickness - CFD modeling - RESULTS AND DISCUSSION : Surface characterization (FTIR, XPS) - Coating thickness - CFD modeling DOI : 10.1007/s11998-018-0049-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0049-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30846 [article]

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Mesoscopic structure and swelling properties of crosslinked polyethylene glycol in water / Gokhan Kacar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 691-701 Titre : Mesoscopic structure and swelling properties of crosslinked polyethylene glycol in water Type de document : texte imprimé Auteurs : Gokhan Kacar, Auteur ; Peter T. M. Albers, Auteur ; A. Catarina C. Esteves, Auteur ; Gijsbertus de With, Auteur Année de publication : 2018 Article en page(s) : p. 691-701 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Gonflement (physique) Hydrophilie Polyéthylène glycol Réticulation à l'humidité Revêtements Simulation par ordinateur Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, we present our efforts in modeling and simulation of polyethylene glycol crosslinked with an isocyanate tHDI. The polymer, by its nature, is hydrophilic and has strong hydrogen bond interactions with water. The simulations are performed at coarse-grained scale by using a dissipative particle dynamics (DPD) simulation method. The effect of hydrogen bond between water and polymer beads on the structure of the crosslinked hydrophilic polymer structure is studied. The polymer is observed to phase separate with water in the absence of hydrogen bonds in DPD simulations. In the reverse case, where hydrogen bonds are explicitly included in DPD simulations, polymer mixes with water. This behavior is investigated by plotting the density profiles. Moreover, the volumetric swelling behavior in mixtures with different water contents is estimated from simulations and extrapolated by a polynomial fit to compare with experiments. It is observed that the predicted swelling ratio is in good agreement with the experimental measurements. Note de contenu : - MATERIALS AND METHODS : Simulation methods - Simulation details - Materials and the coarse-graining of PEG - Preparation and swelling of PEG 2000 - RESULTS AND DISCUSSION : Formation of crosslinked PEG in dry and wet environments - Coordination numbers and swelling of the polymer-water mixtures DOI : 10.1007/s11998-018-0065-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0065-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30847 [article]

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Fast preparation of biopassive nonfouling coatings on cellulose / Alexander S. Münch in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 703-712 Titre : Fast preparation of biopassive nonfouling coatings on cellulose Type de document : texte imprimé Auteurs : Alexander S. Münch, Auteur ; Tina Fritzsche, Auteur ; Helfried Haufe, Auteur ; Petra Uhlmann, Auteur Année de publication : 2018 Article en page(s) : p. 703-712 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Greffage (chimie) Revêtements antisalissures Surfaces fonctionnelles Index. décimale : 667.9 Revêtements et enduits Résumé : The microbial infection as a result of biofilm formation is a serious problem in various fields of application in the paper industry including fouling of filters in air conditioning systems, wallpaper, medical and food packaging as well as ancient documents. In this study, we document a highly nonfouling surface coating formed by a functional copolymer consisting of 2-methacryloyloxyethyl phosphorylcholine, as a zwitterionic and cell repellent component, and 4-benzophenyl methacrylate, acting as an anchor group for a fast UV-induced persistent covalent attachment on thin cellulose model films deposited on silicon wafers. The grafting process, studied by UV–Vis spectroscopy, is much faster in comparison with common grafting-to techniques. The obtained sustainable and nonleaching surface coatings were analyzed by attenuated total reflectance-Fourier transform infrared spectroscopy, contact angle measurements, spectroscopic in situ ellipsometry, and atomic force microscopy. Incubation of the modified cellulose surfaces with either Escherichia coli, Bacillus subtilis or Saccharomyces cerevisiae demonstrates that the zwitterionic polymer functionalization has substantial nonfouling capacity against both Gram-negative and Gram-positive bacteria as well as the yeast fungus. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis - Surface modification - Characterizatioin methods - Cell adhesion experiments - RESULTS AND DISCUSSION : Preparation and characterization of MPC-co-BPO layers on cellulose - Cell adhesion experiments DOI : 10.1007/s11998-018-0066-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0066-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30848 [article]

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Surface topography and tribological properties of coatings prepared from microparticle size polyurethane dispersions studied by atomic force microscopy / Qi Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 713-719 Titre : Surface topography and tribological properties of coatings prepared from microparticle size polyurethane dispersions studied by atomic force microscopy Type de document : texte imprimé Auteurs : Qi Chen, Auteur ; Roel Swaans, Auteur ; Paul de kok, Auteur ; Michael Villet, Auteur ; Yansen Lauw, Auteur ; Matthew Gebhard, Auteur Année de publication : 2018 Article en page(s) : p. 713-719 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dispersions et suspensions Microscopie à force atomique Milieux dispersés Polymères en émulsion Polyuréthanes Revêtements Topographie Tribologie (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : The surface topography and mechanical properties of coatings prepared using large particle size polyurethane dispersions (PUD) are investigated using atomic force microscopy (AFM) imaging, AFM-based force measurements, and friction force microscopy. PUD coatings, which are prepared from dispersions containing particles of micron size, have surface roughness of 250–300 nm and waviness of 2.5–3 μm resulting from the particle size. The surface moduli of the PUD coatings are varied by tuning the ratio of hard-to-soft segmentation in the polyurethanes and are found to be between 40 and 100 MPa. The friction coefficient obtained in the study is found to be correlated with both the surface modulus of the coatings and the adhesion between the probe and the samples and is well in line with the perceived feel of an experienced human panel. The data are very well behaved and clearly show the utility of this technique in characterizing these types of surfaces. Note de contenu : - PUD coatings - AFM imaging and force measurements - Friction force microscopy DOI : 10.1007/s11998-018-0067-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0067-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30849 [article]

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Montmorillonite nanoclay-based self-healing coatings on AA 2024-T4 / S. Manasa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 721-735 Titre : Montmorillonite nanoclay-based self-healing coatings on AA 2024-T4 Type de document : texte imprimé Auteurs : S. Manasa, Auteur ; T. Siva, Auteur ; S. Sathiyanarayanan, Auteur ; K. V. Gobi, Auteur ; R. Subasri, Auteur Année de publication : 2018 Article en page(s) : p. 721-735 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale Anticorrosifs Anticorrosion Argile Caractérisation Epaisseur -- Mesure Essais (technologie) Essais d'adhésion Montmorillonite Revêtement autoréparant:Peinture autoréparante Revêtements -- Analyse:Peinture -- Analyse Revêtements protecteurs Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : Cation-exchanged montmorillonite (MMT), which is an aluminum-pillared clay, was dispersed into an organic–inorganic hybrid silica matrix sol. Cationic inhibitors Ce3+/Zr4+ were introduced into montmorillonite by two methods, namely (1) physical mixing of MMT with the inhibitor solutions and (2) physical mixing for short durations and evacuation of the mixture of MMT and inhibitor solutions. Coatings using these sols were deposited on aluminum alloy AA 2024-T4 substrates, by the dip coating technique followed by thermal curing at 130°C for 1 h. TEM, BET, and XRD analyses were carried out for the inhibitor-modified montmorillonite powders. Potentiodynamic polarization and electrochemical impedance spectroscopic analyses were carried out on uncoated and coated substrates to evaluate the corrosion protection property after exposure to 3.5 wt% NaCl for varying time durations, up to 120 h. Self-healing ability was evaluated using SVET analysis by creating an artificial scribe on the surface and exposure to 3.5 wt% NaCl. Elemental mapping was carried out on scribed substrates before and after exposure to 5 wt% salt fog. Sols containing montmorillonite intercalated with cationic inhibitors when deposited on AA 2024-T4 substrates exhibited low corrosion currents after a prolonged duration of exposure to corrosion medium. Note de contenu : - EXPERIMENTAL : Materials - Sol synthesis and coating deposition - Characterization and testing - RESULTS AND DISCUSSION : TEM and SEM analysis - X-ray diffraction (XRD) analysis - BET surface area and pore volume analysis - Thickness measurement - SEM and EDS analysis - Adhesion test - Electrochemical impedance spectroscopic (EIS) and potentiodynamic polarization studies - Weight loss experiments - Salot fog test (SFT) and energy-dispersive x-ray spectroscopic (EDS) analysis - SVET analysis DOI : 10.1007/s11998-018-0080-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0080-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30850 [article]

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Effect of different structured POSS/GMA-containing copolymers on the morphology of porous coating by breath-figures method / YanLi Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 737-742 Titre : Effect of different structured POSS/GMA-containing copolymers on the morphology of porous coating by breath-figures method Type de document : texte imprimé Auteurs : YanLi Ma, Auteur ; Ling He, Auteur Année de publication : 2018 Article en page(s) : p. 737-742 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymères Matériaux poreux Méthacrylate de glycidyle Morphologie (matériaux) Revêtements Silsesquioxanes oligomères polyhèdres Tags : 'Méthode  des  figures  respiratoires'  'POSS/GMA'  'Effet  solvant'  Coolymères  'Revêtement  organique' Index. décimale : 667.9 Revêtements et enduits Résumé : Polyhedral oligomeric silsesquioxane (POSS) and glycidyl methacrylate (GMA) are used to synthesize linear L-(PGMA-b-MA-POSS), dicephalous D-(PGMA-b-MA-POSS)2, and four-armed T-(PGMA-b-MA-POSS)4 through atom transfer radical polymerization (ATRP). These different structured POSS/GMA-containing copolymers are applied to build the porous films through breath-figures (BF) method. L-(PGMA-b-MA-POSS) is easy to form the ordered porous BF film, and T-(PGMA-b-MA-POSS)4 tends to form well-distributed BF film due to its high segment density which is beneficial to stabilize water drop. It is proven that solvent has a great effect on the morphologies of BF film. The perfect BF film is developed in the relatively wet atmosphere as 5–8 μm diameter of pores casted in THF and 2–4 μm diameter of pores casted in CH2Cl2 with regular morphology. The developed BF film has superior stability than the film developed in natural conditions due to the shorter stable balancing time. Therefore, it is believed that the obtained porous films show great potential in coating application. Note de contenu : - EXPERIMENT METHODS AND MATERIALS : Materials - Synthesis of POSS/GMA-containing copolymers - Preparation of BF porous films - Measurements - RESULTS AND DISCUSSIONS : The surface morphology of BF films - The water adsorption behavior of BF films DOI : 10.1007/s11998-018-0083-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0083-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30851 [article]

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Comparison of test methods estimating the stiffness of ultrathin coatings / Marcus Vinicius Tavares da Costa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 743-752 Titre : Comparison of test methods estimating the stiffness of ultrathin coatings Type de document : texte imprimé Auteurs : Marcus Vinicius Tavares da Costa, Auteur ; Cristian Neagu, Auteur ; Pierre Fayet, Auteur ; Urban Wiklund, Auteur ; Hu Li, Auteur ; Klaus Leifer, Auteur ; E. Kristofer Gamstedt, Auteur Année de publication : 2018 Article en page(s) : p. 743-752 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Elasticité Essais (technologie) Essais dynamiques Etudes comparatives Matériaux -- Propriétés barrières Nanoindentation Nanotechnologie Polymères Revêtements Revêtements -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : A key engineering parameter of thin coatings is their stiffness. Stiffness characterization of ultrathin coatings with a nanometer scale thickness is experimentally challenging. In this work, three feasible methods have been used to estimate the Young’s modulus of metal coatings on polymer films. The methods are: (1) nanoindentation, (2) strain-induced elastic buckling and (3) peak-force measurements integrated in atomic force microscopy. The samples were prepared by atomic layer deposition of TiO2 (6 and 20 nm thick) and mixed oxides of TiO2 and Al2O3 (4 and 20 nm thick). The differences in estimated Young’s modulus are interpreted in terms of the underlying assumptions and test conditions. Their specific advantages and drawbacks are also compared and discussed. In particular, the nanoindentation necessitates a sufficiently sharp indenter tip to make localized measurements dominated by the coating. The strain-induced elastic buckling method is simple in practice, but showed a large scatter due to variation in local coating thickness and irregular deformation patterns. The stiffness characterization using atomic force microscopy gave the most consistent results, due to a sharp tip with a radius comparable to the thinnest coating thickness. All methods gave a higher Young’s modulus for the TiO2 coating than for the mixed oxide coating, with a variation within one order of magnitude between the methods. Note de contenu : - MATERIALS AND METHODS : Samples - Tensile testing - Nanoindentation - Strain-induced elastic buckling instability for mechanical measurement - AFM peak-force measurements - RESULTS AND DISCUSSION : Tensile testing - Nanoindentation - SIEBIMM - AFM peak-force measurement - Comparison of results - CONCLUDING REMARKS - APPENDIX A : EFFECTS OF THE CONDUCTIVE LAYER IN THE BARRIER COATING PROPERTIES DOI : 10.1007/s11998-018-0085-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0085-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30852 [article]

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Porosity measurements in suspension plasma sprayed YSZ coatings using NMR cryoporometry and X-ray microscopy / Uta Klement in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 753-757 Titre : Porosity measurements in suspension plasma sprayed YSZ coatings using NMR cryoporometry and X-ray microscopy Type de document : texte imprimé Auteurs : Uta Klement, Auteur ; Johanna Ekberg, Auteur ; Simone Creci, Auteur ; Stephen T. Kelly, Auteur Année de publication : 2018 Article en page(s) : p. 753-757 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt par pulvérisation Mesure Porosité Projection au plasma Résonance magnétique nucléaire Revêtement métallique Stabilisants (chimie) Technique des plasmas Yttrium Zirconium Index. décimale : 667.9 Revêtements et enduits Résumé : A large variety of coatings are used to protect structural engineering materials from corrosion, wear, and erosion, and to provide thermal insulation. In this work, yttria-stabilized zirconia coatings produced by suspension plasma spraying were investigated with respect to their microstructure and especially their porosity, as the porosity affects the thermal insulation of the underlying component. To determine porosity, pore size distribution, and pore shape, the coatings were investigated using novel advanced characterization techniques like NMR cryoporometry and X-ray microscopy. In general, the porosity is inhomogeneously distributed and the coatings showed a large variety of pore sizes ranging from a few nanometers to micrometers. DOI : 10.1007/s11998-018-0053-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0053-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30853 [article]

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Morphological properties of airbrush spray-deposited enzymatic cellulose thin films in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 759-769 Titre : Morphological properties of airbrush spray-deposited enzymatic cellulose thin films Type de document : texte imprimé Année de publication : 2018 Article en page(s) : p. 759-769 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Couches minces Dépôt par pulvérisation Diffractométrie de rayons X Métaux -- Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : We investigate the layer formation of enzymatic cellulose by airbrush spray coating on silicon oxide surfaces. The layer structure and morphology of enzymatic cellulose films in the thickness range between 86 nm and 2.1 µm is determined as a function of the spray coating procedures. For each spray coating step, layer buildup, surface topography, crystallinity as well as the nanoscale structure are probed with atomic force microscopy and surface-sensitive X-ray scattering methods. Without intermittent drying, the film thickness saturates; with intermittent drying, a linear increase in layer thickness with the number of spray pulses is observed. A closed cellulose layer was always observed. The crystallinity remains unchanged; the nanoscale structures show three distinct sizes. Our results indicate that the smallest building blocks increasingly contribute to the morphology inside the cellulose network for thicker films, showing the importance of tailoring the cellulose nanofibrils. For a layer-by-layer coating, intermittent drying is mandatory. Note de contenu : - SAMPLE PREPARATION : Cellulose nanofibril preparation - Thin film preparation - RESULTS AND DISCUSSION : Topographical information - Crystallinity - Structure and morphology DOI : 10.1007/s11998-018-0089-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0089-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30854 [article]

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Effect on wear resistance of nanoparticles addition to a powder polyester coating through ball milling / Maria Fernandez-Alvarez in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 771-779 Titre : Effect on wear resistance of nanoparticles addition to a powder polyester coating through ball milling Type de document : texte imprimé Auteurs : Maria Fernandez-Alvarez, Auteur ; Francisco Velasco, Auteur ; Asuncion Bautista, Auteur Année de publication : 2018 Article en page(s) : p. 771-779 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Fragmentation Nanoparticules Polyesters Résistance à l'usure Revêtement poudre -- Additifs:Peinture poudre -- Additifs 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. Thermodurcissables Index. décimale : 667.9 Revêtements et enduits Résumé : The wear properties of a textured polyester powder coating with pyrogenic silica nanoparticles addition were evaluated. Raw powders of a commercial, textured polyester organic coating were mixed with low amounts of SiO2 nanoparticles (0.5–3 wt%) using ball milling, a simple and economical method. Nanoparticles were mixed into the powder of thermoset organic coating for 10 min in a two-body planetary ball mill. Particle size distribution of the powder was measured to evaluate the milling effect. The coatings were applied and cured in an industrial installation on aluminum substrates. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) images of the coatings were taken to analyze the homogeneity of the organic coating. Roughness, gloss and color were measured in order to evaluate their appearance. The effect of nanoparticles on abrasive and erosion wear performances was measured. Pin-on-disk wear tests were carried out. Erosion measurements were performed with free fall of sand on the samples, a test based on ASTM D968 standard. The results showed that the milling process provides a good distribution of nanoparticles as no agglomerates were found. The addition of 0.5 wt% silica nanoparticles allows for improvement of the wear resistance of the coatings. DOI : 10.1007/s11998-018-0106-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0106-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30855 [article]

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Atomic force microscopy analysis of cathodic arc ion-plated CrN and CrC coatings / Kong Dejun in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 781-787 Titre : Atomic force microscopy analysis of cathodic arc ion-plated CrN and CrC coatings Type de document : texte imprimé Auteurs : Kong Dejun, Auteur ; Zhu Shouyu, Auteur Année de publication : 2018 Article en page(s) : p. 781-787 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbure de chrome Nitrure de chrome Revêtement métallique Index. décimale : 667.9 Revêtements et enduits Résumé : Coatings of CrN and CrC were deposited on a YT14 cemented carbide cutting tool using cathodic arc ion plating (CAIP). The surface and interface morphologies of the as-obtained CrN and CrC coatings were analyzed using a field emission scanning electron microscope. The heights, particle diameters and power spectral densities of CrN and CrC coatings were analyzed using atomic force microscopy and the correlated parameters of roughness were obtained. The results show that the roughness of the CrN and CrC coatings is 81.7 × 10−3 and 70.2 × 10−3 nm, respectively, and CAIP has little effect on the CrN and CrC coating roughness. The height of the peak values of CrN and CrC coatings is 0.498 and 0.502 nm, respectively, and the reduction friction of the CrN coating was slightly better than that of the CrC coating. The average particle diameter of the CrN and CrC coatings is 6.575 × 102 and 7.678 × 102 nm, respectively, and the particles are uniformly distributed with no large-scale fluctuations. The power between the cursors of the CrN and CrC coatings is 1.44 × 10−2 and 9 × 10−3 nm2, respectively, with the power spectral density of the CrN coating being the dominant frequency. Note de contenu : - Surface and interface morphologies - Atomic force topographies - Height analysis - Analysis of particle diameters - Analysis of power spectra DOI : 10.1007/s11998-017-0034-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0034-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30856 [article]

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Recent developments in the volatile corrosion inhibitor (VCI) coatings for metal : a review / Sukanya Gangopadhyay in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 789-807 Titre : Recent developments in the volatile corrosion inhibitor (VCI) coatings for metal : a review Type de document : texte imprimé Auteurs : Sukanya Gangopadhyay, Auteur ; Prakash A. Mahanwar, Auteur Année de publication : 2018 Article en page(s) : p. 789-807 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Essais (technologie) Inhibiteurs de corrosion volatils Métaux -- Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Corrosion is a crucial worldwide problem that strongly affects metals. Out of the several ways to prevent corrosion, volatile corrosion inhibitors (VCIs) are predominantly used as a method of temporary protection. These compounds have the ability to vaporize and condense on the surface of the ferrous or nonferrous material and make the substrate less susceptible to corrosion but work only in a confined space. VCI compounds form a monomolecular layer over the metal surface, thereby preventing the electrochemical reactions on the metal surface which lead to corrosion. This review article outlines the use of volatile corrosion inhibitors (VCIs) as a temporary corrosion protection technique, their working mechanisms and the various compounds used as VCI. It also anchors on the latest research works which have been carried out on VCI coatings along with a glimpse of the works that were carried out in the past. The various factors affecting the volatile corrosion inhibitors along with the merits of VCI coatings are discussed in this paper. Formulations for both strippable and permanent VCI coatings are also reported with the various testing methods. Lastly, an overview of the recent developments of VCI coatings along with the various green VCI is given. Note de contenu : - INTRODUCTION : Volatile corrosion inhibitors - LITERATURE REVIEW : Volatile corrosion inhibitors (VCIs) - Cost of corrosion : market survey - Volatile corrosion inhibitor (VCI) compounds - Various forms of VCI compounds - VCI working mechanism - Effectiveness and factors affecting volatile corrosion inhibitors - Adherence of VCI coating - Merits of volatile corrosion inhibitor coatings - Volatile corrosion inhibitor (VCI) - TYpes of volatile corrosion inhibitor coating - Mode of application of VCI coating - Green volatile corrosion inhibitors - Testing methods for VCI coatings - Future trends in VCI coatings DOI : 10.1007/s11998-017-0015-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0015-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30857 [article]

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A fluorine–silicone acrylic resin modified with UV-absorbing monomers and a free radical scavenger / Huibin Lei in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 809-817 Titre : A fluorine–silicone acrylic resin modified with UV-absorbing monomers and a free radical scavenger Type de document : texte imprimé Auteurs : Huibin Lei, Auteur ; Deliang He, Auteur ; Jun Hu, Auteur ; Ping Li, Auteur ; Haihong Huang, Auteur Année de publication : 2018 Article en page(s) : p. 809-817 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorbeurs de rayonnement ultraviolet Absorption Angle de contact Antiradicalaire Fluor Hydrophobie Polyacryliques Radicaux libres (chimie) Rayonnement ultraviolet Résistance aux conditions climatiques Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Vernis -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : A novel UV-absorbing and free-radical-catching fluorine–silicone acrylic resin with 2-(4-benzoyl-3-hydroxyphenoxy) ethyl acrylate (BHEA), 2,2,6,6-tetramethyl-4-piperidyl methacrylate (TMPM), dodecafluoroheptyl methacrylate (DFMA) and 3-methacryloxypropyltrimethoxysilane (MPS) as functional monomers was successfully synthesized by solution copolymerization. Based on various investigations, our characterization results for the resin and its coating indicated that the resin exhibits high UV-absorbing and free-radical-catching performances, and the hydrophobicity of the varnish coating was promoted by the actions of fluorine and silicone. In addition, the weatherability improved because of the enduring triple protection of the UV absorbent (BHEA), free-radical-catching agent (TMPM), fluorine (DFMA) and silicone (MPS). After a 1000-h aging test, the color difference (∆E) and rate of loss of gloss (∆G) of varnish coatings were 2.96% and 62%, respectively, and the impact strength and flexibility of color paint coatings were 420 N cm and 2 mm, respectively. Moreover, the chemically bonded free-radical-catching agent (TMPM) showed a more enduring performance for producing nitroxides than the simple blend. Note de contenu : - EXPERIMENTAL : Materials - Preparation of the resins and coatings - Characterizations - RESULTS AND DISCUSSION : FTIR analysis - X-ray photoelectron spectroscopy (XPS) analysis - Ultraviolet absorption properties - Free-radical-catching performance - Water contact angle (CA) - Weather resistance - Mechanical properties DOI : 10.1007/s11998-018-0078-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0078-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30858 [article]

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Preparation in presence of urushiol and properties of acrylate latex with interparticle bridges / Jianhong Yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 819-830 Titre : Preparation in presence of urushiol and properties of acrylate latex with interparticle bridges Type de document : texte imprimé Auteurs : Jianhong Yang, Auteur ; Qin Shen, Auteur ; Fengqin Shen, Auteur ; Jun Cai, Auteur ; Wanghui Liu, Auteur ; Ming Zhou, Auteur Année de publication : 2018 Article en page(s) : p. 819-830 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Caractérisation Humidité -- Absorption:Eau -- Absorption Latex Polyacrylates Polymérisation en émulsion Potentiel zeta Résonance magnétique nucléaire Revêtements -- Propriétés mécaniques Revêtements -- Propriétés thermiques Spectrométrie infrarouge Urushiol L’urushiol est une toxine organique que l'on trouve dans les plantes de la famille des Anacardiaceae, spécialement dans le genre Toxicodendron (par exemple le sumac grimpant en Amérique du Nord). Il provoque des allergies de la peau ou dermatites, pouvant être importantes, au contact de ces plantes. Le nom vient du mot japonais urushi (漆?), qui désigne une laque produite dans l'Asie orientale à partir du suc des arbres kiurushi (arbre à laque). L'oxydation et la polymérisation de l'urushiol dans le suc de l'arbre en présence d'humidité permet de former une laque dure utilisée traditionnellement pour produire des objets d'art laqués en Chine et au Japon. Index. décimale : 667.9 Revêtements et enduits Résumé : Acrylate latices were prepared by seeded emulsion polymerization of methyl methacrylate (MMA) and butyl acrylate (BA) in presence of urushiol with multifunctional groups (0–6 wt%). The emulsion polymerization was strongly influenced by the urushiol content. With increasing urushiol content, the conversion rate of the monomers first increased then decreased, the stability of emulsion polymerization gradually declined, the average particle size of the latex increased from 115.9 to 175.3 nm, and a change from mono- to bimodal particle size distribution occurred. Interestingly, transmission electron microscopy (TEM) showed that some particles were connected by linear bridges in presence of urushiol. Based on results of 1H nuclear magnetic resonance (NMR) analysis, such formation of interparticle bridges is due to participation of urushiol in the emulsion polymerization of the acrylate monomers. The content of urushiol also affected the properties of latex films. With increasing urushiol content from 0 to 3 wt%, the adhesion, pencil hardness, and contact angle were markedly improved from grade 6 to grade 2, from B to 3H, and from 22° to 61°, respectively, due to formation of interparticle bridges. When the content of urushiol exceeded 3 wt%, the adhesion and pencil hardness remained unchanged, but the water contact angle markedly declined because of higher surface roughness of the latex film. Furthermore, addition of urushiol enhanced the thermal stability of the latex films. Note de contenu : - EXPERIMENTAL : Materials - Preparation of acrylate latex - Preparation of acrylate latex films - Characterization - RESULTS AND DISCUSSION : IR spectra - H NMR analysis - Average size and zeta potential of latex particles - Conversion and coagulation rate - Contact angle and water absorption - Thermal properties - Mechanical properties DOI : 10.1007/s11998-017-0023-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0023-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30859 [article]

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Synthesis and characterization of solvent-free hybrid alkyd resin with hyperbranched melamine core / Güngör Gündüz in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 831-843 Titre : Synthesis and characterization of solvent-free hybrid alkyd resin with hyperbranched melamine core Type de document : texte imprimé Auteurs : Güngör Gündüz, Auteur ; Nagehan Keskin, Auteur ; Üner Çolak, Auteur ; Bora Mavis, Auteur Année de publication : 2018 Article en page(s) : p. 831-843 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Brillance (optique) Composés organiques -- Synthèse Esterification Hexaméthylol mélamine Matériaux hybrides Mélamine La mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6. Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde. Polyalkydes Polymères ramifiés Revêtement de surface Revêtements -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, a new hybrid alkyd resin was formulated using melamine-based hyperbranched polymer having 24 hydroxyl groups on its structure and relatively low molecular weight alkyd. The alkyd was synthesized using an oil mixture (40% linseed + 60% sunflower). Melamine was used as the core molecule for the hyperbranched polymer due to its excellent properties such as greater hardness, alkali and solvent resistance, and thermal stability. Melamine was first hydroxylated using formaldehyde and changed into hexamethylol melamine. This product was then twice hydroxylated with dimethylol propionic acid to obtain a hyperbranched polymer with 24 hydroxyl end groups. It was then reacted with low molecular weight alkyd resin at different proportions. The product had a low viscosity and could easily flow like oil. It is a solvent-free and water-free liquid. The ‘hyperbranched polymer/alkyd’ ratio affected physical properties of the liquid polymer and also the mechanical properties of the hardened polymer, which can be used for surface coating. The viscosity of the liquid resin decreases from 148 to 8.84 Pa.s as the hyperbranched-polymer-to-alkyd ratio is decreased from 1:3 to 1:24. On the other hand, the hardness of heat-treated resin decreases from 198 Persoz to 43 Persoz, respectively. That is, the increase in the amount of hyperbranched polymer in the resin increases hardness, whereas the increase in the amount of alkyd decreases it. The mechanical tests of hardened resins showed that all specimens passed conical mandrel bending test, and they all depicted high adhesion, and high abrasion and impact resistance. The specimens also had excellent gloss properties. Note de contenu : - SYNTHESIS OF HYPERBRANCHED POLYMER WITH MELAMINE CORE : Synthesis of hexamethylol melamine - Esterification of hexamethylol melamine - Synthesis of alkyd - CHARACTERIZATION OF PRODUCTS : FTIR spectra - Effect of the type of oil on surface appearance - MECHANICAL PROPERTIES : Hardness - Impact resistance - Bending resistance - Abrasioin resistance - Adhesion - Gloss DOI : 10.1007/s11998-017-0031-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0031-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30860 [article]

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Potential for fungal dyes as colorants in oil and acrylic paints / Seri C. Robinson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 845-849 Titre : Potential for fungal dyes as colorants in oil and acrylic paints Type de document : texte imprimé Auteurs : Seri C. Robinson, Auteur ; Sarath Mercedes Vega Guttierrez, Auteur ; Rosa Amelia Cespedes Garcia, Auteur ; Nicole Iroume, Auteur ; Nikole Renee Vorland, Auteur ; Claudia Andersen, Auteur ; Igor D. de Oliveira Xaxa, Auteur ; Olivia E. Kramer, Auteur ; Megan E. Huber, Auteur Année de publication : 2018 Article en page(s) : p. 845-849 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Champignons et constituants Colorants végétaux Essais (technologie) Huile de lin L'huile de lin ou "huile de graines de lin" est une huile de couleur jaune d'or, tirée des graines mûres du lin cultivé, pressées à froid et/ou à chaud ; parfois elle est extraite par un solvant, en vue de l'usage industriel ou artistique, principalement comme siccatif, ou huile auto-siccative. Les utilisations de l'huile de lin dérivent de sa richesse en acides gras polyinsaturés, en particulier en acides linolénique et linoléique, qui lui doivent leur nom. L'huile de lin polymérise spontanément à l'air, avec une réaction exothermique : un chiffon imbibé d'huile peut ainsi, dans certaines conditions, s'enflammer spontanément. Pour ses propriétés de polymère, l'huile de lin est employée seule, ou mélangée à d'autres huiles, résines et solvants, et est utilisée en tant que : Imprégnateur et protecteur des bois à l'intérieur comme à l'extérieur : protection contre l'humidité, les champignons et insectes, et contre la poussière par son caractère antistatique, composant de certains vernis de finition, liant de broyage pour la peinture à l'huile, agent plastifiant du mastic de vitrier, agent durcisseur de diverses préparations, agent de cohérence et liant dans la fabrication du linoléum. Immersion Peinture à l'huile Polyacryliques Revêtements -- Analyse:Peinture -- Analyse Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Potential applications for colorants derived from the spalting fungi Chlorociboria aeruginascens, Chlorociboria aeruginosa, Scytalidium cuboideum, and Scytalidium ganodermophthorum are of growing interest across a variety of fields, from wood and textile dyes, to solar cells. Previous research found that these dyes could be carried in natural oils, specifically raw linseed oil, instead of organic solvents, thereby eliminating the toxicity issues surrounding such carriers. In this work, dyes from the aforementioned fungi were extracted, carried in raw linseed oil, and mixed with a range of oil and acrylic paints to determine if the oil carrier was appropriate for delivering the dyes into a paint matrix. The oil-based dyes did not mix evenly with the acrylic paints; however, the acrylic paints maintained the color of the dyes. In contrast, the oil-based paints mixed well with the dyes, but the dyes decolorized (completely lost color) due to the presence of refined linseed oil in the paint base. Artists’ paints do not appear to be compatible with fungal dyes when carried in oil; however, there are still many potential applications for the oil-based dyes, such as wood and textile dyeing. Note de contenu : - Fungi - Submersion in oil - Paints - Tests - Analysis DOI : 10.1007/s11998-017-0032-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0032-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30861 [article]

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Effect of artificial weathering and temperature cycling on the performance of coating systems used for wooden windows / Eliska Oberhofnerova in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 851-865 Titre : Effect of artificial weathering and temperature cycling on the performance of coating systems used for wooden windows Type de document : texte imprimé Auteurs : Eliska Oberhofnerova, Auteur ; Stepan Hysek, Auteur ; Milos Panek, Auteur ; Martin Böhm, Auteur Année de publication : 2018 Article en page(s) : p. 851-865 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale Bois -- Revêtements Brillance (optique) -- Mesure Décoloration Essais accélérés (technologie) Microscopie électronique à balayage Polyacrylates Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : The effects of ultraviolet light irradiation and water spray and temperature cycling on the color stability of waterborne coating systems on spruce were investigated. The test samples were treated with three coating systems (white and brown pigmented acrylate waterborne coatings systems with different layering) from six producers. The artificial weathering was carried out based on standardized (504 h) and increased weathering parameters (504 h). Thirty cycles of temperature changes were performed. Discoloration suggesting the rate of degradation process and color stability was measured by a spectrophotometer in L*a*b* color space. The results showed greater color stability of white coating systems during both experiments. The producer of acrylate coatings with iodopropynyl butyl carbamate and permethrin as biocides and benzotriazole, silicon dioxide and methylsiloxane as additives was characterized by the best coatings performance. The most sensitive color parameter to describe the surface quality as a result of irradiation and water spray has proven to be a change of lightness. A tendency towards degradation with increasing lightness was observed during weathering. The effect of temperature itself on color change was minimal. Scanning electron microscopy and energy dispersive spectroscopy revealed microscopic changes of coatings caused by artificial weathering. Note de contenu : - EXPERIMENTAL : Material and coating application - Artificial weathering - Temperature cycling - Color measurements - Gloss measurements - Scanning electron microscopy and energy dispersive spectroscopy - Statistical evaluation - RESULTS AND DISCUSSION : Color changes after artificial weathering test - Color changes after temperature cycling - Gloss measurement - Scanning electron microscopy and energy dispersive spectroscopy DOI : 10.1007/s11998-017-0033-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0033-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30862 [article]

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Preparation of paraffin-based phase-change microcapsules and application in geopolymer coating / Xuesen Lv in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 867-874 Titre : Preparation of paraffin-based phase-change microcapsules and application in geopolymer coating Type de document : texte imprimé Auteurs : Xuesen Lv, Auteur ; Pei Guo, Auteur ; Haifeng Liu, Auteur ; Li Cui, Auteur ; Xuemin Cui, Auteur Année de publication : 2018 Article en page(s) : p. 867-874 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcanes Copolymères Energie -- Stockage Géopolymères Les géopolymères sont la réciproque des polymères organiques. À la place de dérivés du pétrole et de la chaîne carbonée, on utilise de la matière minérale composée de silice et d’alumine. Les géopolymères sont basés sur des alumino-silicates désignés sous le terme poly(sialate), qui est une abréviation de poly(silico-oxo-aluminate) ou (-Si-O-Al-O-)n (soit n le degré de polymérisation). La structure chimique de la Figure 1 montre un géopolymère poly(sialate-siloxo) résultant d'une géosynthèse de poly(silisique) acide (SiO2)n et de potassium alumino-silicate, en milieu alcalin (KOH, NaOH). Dans cette structure, le groupement sialate (Si-O-Al-O-) est un agent de réticulation. On pense que le mécanisme de la synthèse géochimique se fait par l'intermédiaire d'oligomères (dimère, trimère) qui constituent les véritables groupements structuraux unitaires formant une structure macromoléculaire tridimensionnelle. Isolation thermique Microcapsules Polyacryliques Polymérisation Revêtements Revêtements -- Analyse Transition de phase En physique, une transition de phase est une transformation du système étudié provoquée par la variation d'un paramètre extérieur particulier (température, champ magnétique...). Cette transition a lieu lorsque le paramètre atteint une valeur seuil (plancher ou plafond selon le sens de variation). La transformation est un changement des propriétés du système. Index. décimale : 667.9 Revêtements et enduits Résumé : A type of paraffin phase-change microcapsule for thermal insulation of exterior walls was prepared by in situ polymerization of low-softening-point paraffin (46°C) as core material and acrylic copolymer as shell. The surface morphology, phase-change thermal properties, and thermal stability were characterized by scanning electron microscopy, laser particle size distribution analysis, differential scanning calorimetry, and thermogravimetric analysis, respectively. The results showed that, for polymerization reaction temperature of 75°C and paraffin/acrylic copolymer mass ratio of 1.8, the microcapsules prepared at rotation speed of 1600 r/min with 8% emulsifiers were spherical particles with smooth surface and average particle size of 0.68 μm. The phase-change temperature and latent heat storage capacity of the microcapsules were 47.8°C and 174 J/g, respectively. The paraffin phase-change microcapsules obtained using the optimum synthesis condition were mixed in a metakaolin-based geopolymer coating at different proportions, and the thermal insulation ability of the resulting phase-change thermal energy storage coating characterized. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Experiments - Characterization and testing - RESULTS AND DISCUSSION : Characterization of MEPCM - Characterization of phase-change thermal energy storage coating Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30863 [article]

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Development of graphite-based conductive textile coatings / Patricia Schäl in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 875-883 Titre : Development of graphite-based conductive textile coatings Type de document : texte imprimé Auteurs : Patricia Schäl, Auteur ; Irén Juhasz, Auteur ; Nils Grimmelsmann, Auteur ; Andrea Ehrmann, Auteur Année de publication : 2018 Article en page(s) : p. 875-883 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Conducteurs organiques Graphite Polyuréthanes Résistance au lavage Textiles et tissus à usages techniques Index. décimale : 667.9 Revêtements et enduits Résumé : Conductive yarns and coatings are necessary for a broad variety of smart textile applications, such as sensors, data transmission lines, or heated fabrics. The main problems of such conductive textile elements are abrasion and washing resistance. Since different findings with respect to these properties are reported in the literature for similar coatings, the required optimization is impeded. In a recent study, the washing resistance of different graphite–polyurethane coatings with graphite contents between 25% and 33% on cotton, linen, viscose, and polyester woven fabrics was compared, using two different graphite particle sizes on diverse textile substrates. It was found that not only the graphite particle dimensions and graphite concentration strongly influence the longevity of the coatings, but also the textile substrates which were coated with the conductive mass. This means that conductive coatings cannot be optimized without knowledge of the planned application. DOI : 10.1007/s11998-017-0024-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0024-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30864 [article]

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Feasibility of a polybisphenol A epichlorohydrin (PBAE)/antimony-doped tin oxide polymer composite as an NIR absorption coating for outdoor applications / Ju Yong Sim in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 885-889 Titre : Feasibility of a polybisphenol A epichlorohydrin (PBAE)/antimony-doped tin oxide polymer composite as an NIR absorption coating for outdoor applications Type de document : texte imprimé Auteurs : Ju Yong Sim, Auteur ; Jeongyup Kim, Auteur ; Won-Gil Lee, Auteur ; Won-Je Cho, Auteur ; C. Justin Raj, Auteur ; Byung Chul Kim, Auteur ; Kook Hyun Yu, Auteur Année de publication : 2018 Article en page(s) : p. 885-889 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimoine Composites polymères Couches minces Dioxyde d'étain Épichlorohydrine L'épichlorohydrine ou épichlorhydrine ou 1-chloro-2,3-époxypropane, est un composé organochloré de formule semi-développée CH2CHOCH2Cl, liquide volatil toxique, incolore à forte odeur d'ail. Un atome de carbone de l'épichlorohydrine est chiral, il existe donc deux formes énantiomères de ce composé. Nanoparticules -- Synthèse Polybisphénol A Polymères -- Propriétés optiques Rayonnement infrarouge -- Absorption Revêtements -- Propriétés optiques Solutions de polymère Verre -- Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : A polybisphenol A epichlorohydrin/antimony-doped tin oxide (PBAE/ATO) polymer composite solution was prepared by utilizing various weight percentages of ATO nanoparticles (~ 19 nm). The optical properties of the PBAE/ATO composites were analyzed by fabricating thin films on glass substrates. The polymeric film with 3 wt% ATO showed good transparency in the visible and UV regions and strong absorption in the NIR region. Moreover, under light illumination, the PBAE/ATO thin film displayed an ~ 24.4°C rise in temperature relative to the reference thin film. In addition, the outdoor NIR absorption efficiency was studied by spray coating a PBAE/ATO thin film over a vinyl greenhouse, and it was observed that the PBAE/ATO-coated greenhouse prevented snow deposition during the winter by melting the snowflakes through NIR absorption. Note de contenu : - Materials - Synthesis of ATO nanoparticles - Fabrication of the polymer/ATO composite DOI : 10.1007/s11998-018-0073-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0073-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30865 [article]

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Comparative study of the dynamic hydrophobicity of fluoroalkylsilane coatings tilted at acute and obtuse angles / Yuta Higashino in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 891-898 Titre : Comparative study of the dynamic hydrophobicity of fluoroalkylsilane coatings tilted at acute and obtuse angles Type de document : texte imprimé Auteurs : Yuta Higashino, Auteur ; Hirokazu Takahashi, Auteur ; Munetoshi Sakai ; Toshihiro Isobe ; Sachiko Matsushita, Auteur ; Akira Nakajima, Auteur Année de publication : 2018 Article en page(s) : p. 891-898 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de glissement Fluoroalkylsilane Gouttelettes Hydrophobie Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : The relation between surface homogeneity and internal fluidity for a droplet sliding on a surface tilted at acute and obtuse angles was investigated using two hydrophobic fluoroalkylsilane (FAS) coatings with different roughness. The coatings (FAS-smooth and FAS-rough) were prepared on an Si substrate using chemical vapor deposition or soaking methods and were tilted at 35° or 145°. Sliding velocity of water droplets on the surface tilted at 145° was greater than that tilted at 35° for both coatings. For 35° tilting, the dominant mode of the sliding velocity was slipping for FAS-smooth, whereas rolling governed the entire sliding velocity for FAS-rough. The slipping mode was more important than the rolling one for both coatings when they were tilted at 145°. The change of slipping velocity was more remarkable than that of rolling one for both coatings between 35° and 145° tilting. Results show that the difference in gravity direction and contact area of the droplets contributed to this tilt angle dependence of the sliding velocity. When a droplet slid down with acceleration on FAS-smooth surface, the coefficient of the viscous drag force correlated with the velocity ratio (Utotal/Uslip). DOI : 10.1007/s11998-018-0064-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0064-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30866 [article]

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