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Effects of pigmentation on siloxane-polyurethane coatings and their performance as fouling-release marine coatings / Stacy A. Sommer in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 661-670 Titre : Effects of pigmentation on siloxane-polyurethane coatings and their performance as fouling-release marine coatings Type de document : texte imprimé Auteurs : Stacy A. Sommer, Auteur ; Joseph R. Byrom, Auteur ; Hanna D. Fischer, Auteur ; Rajan B. Bodkhe, Auteur ; Shane J. Stafslien, Auteur ; Justin W. Daniels, Auteur ; Carolyn Yehle, Auteur ; Dean C. Webster, Auteur Année de publication : 2011 Article en page(s) : p. 661-670 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Marines (peinture) Polyuréthanes Revêtements autostratifiants:Peinture autostratifiante Salissures marines 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). Index. décimale : 667.9 Revêtements et enduits Résumé : Siloxane-polyurethane paints were formulated and characterized for coating properties and performance as fouling-release (FR) marine coatings. Paints were formulated at 20 and 30 pigment volume concentrations with titanium dioxide, and aminopropyl-terminated poly (dimethylsiloxane) (APT-PDMS) loadings were varied from 0 to 30% based on binder mass. The coatings were characterized for water contact angle, surface energy (SE), gloss, and pseudo-barnacle (PB) adhesion. The assessment of the FR performance compared with polyurethane (PU) and silicone standards through the use of laboratory biological assays was also performed. Biofilm retention and adhesion were conducted with the marine bacterium Cellulophaga lytica, and the microalgae diatom Navicula incerta. Live adult barnacle reattachment using Amphibalanus amphitrite was also performed. The pigmented coatings were found to have properties and FR performance similar to those prepared without pigment. However, a higher loading of PDMS was required, in some cases, to obtain the same properties as coatings prepared without pigment. These coatings rely on a self-stratification mechanism to bring the PDMS to the coating surface. The slight reduction in water contact angle (WCA) and increase in pseudobarnacle release force with pigmentation suggests that pigmentation slowed or interfered with the self-stratification mechanism. However, increasing the PDMS loading is an apparent method for overcoming this issue, allowing for coatings having similar properties as those of clear coatings and FR performance similar to those of silicone standard coatings. Note de contenu : - Materials - Acrylic polyol preparation and characterization - APT-PDSM preparation - Rapid GPC - Pigment grind preparation - Pigmented siloxan-polyurethane coating formulation - Siloxane-polyurethane preparation - WCA and SE characterizations - Gloss - Pseudobarnacle (PB) adhesion - Preleaching andleachate toxicity analysis - Cellulophaga lytica biofilm retention and adhesion - Navicula incerta attachment and adhesion - Amphibalanus amphitrite adult barnacle reattachment assay DOI : 10.1007/s11998-011-9340-3 En ligne : http://download.springer.com/static/pdf/657/art%253A10.1007%252Fs11998-011-9340- [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12593 [article]

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Coatings derived from novel, soybean oil-based polymers produced using carbocationic polymerization / Samim Alam in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 671-683 Titre : Coatings derived from novel, soybean oil-based polymers produced using carbocationic polymerization Type de document : texte imprimé Auteurs : Samim Alam, Auteur ; Bret J. Chisholm, Auteur Année de publication : 2011 Article en page(s) : p. 671-683 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Huile de soja Polyaddition Polyvinyl éther Ressources renouvelables Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, a process was developed to obtain vinylether-functional monomers containing fatty acid pendent groups directly from soybean oil (SBO) using base-catalyzed transesterification. In addition, a carbocationic polymerization process was developed for the vinylether monomers, which allowed for high molecular weight polymers to be produced without consuming any of the vinyl groups present in the fatty acid portion of the monomers. Compared to SBO, which possesses on average 4.5 vinyl groups per molecule, the polyvinylethers based on the soybean oil-derived vinylether monomers (polyVESFA) possess tens to thousands of vinyl groups per molecule depending on the polymer molecular weight produced. As a result of this difference, coatings based on polyVESFA were shown to possess much higher crosslink density at a given degree of functional group conversion compared with analogs based on conventional SBO. In addition, the dramatically higher number of functional groups per molecule associated with polyVESFA results in gel-points being reached at much lower functional group conversion, which was shown to dramatically reduce cure-time compared with SBO-based analogs. Based on the results obtained, it appears that these new renewable materials may have tremendous commercial utility in the coatings industry. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of the vinylether of SBO fatty acids (VESFA) - Synthesis of the polymer of VESFA (polyVESFA) - Synthesis of epoxidized polyVESFA (E-polyVESFA) - Synthesis of acrylated polyVESFA (A-polyVESFA) - Coating preparation - Instrumentation and procedures. - RESULTS AND DISCUSSION : VESFA synthesis - Synthesis and properties of polyVESFA - Coatings cured using autoxidation - Coatings produced by epoxy/amine-cure - Coatings produced by cationic photocure - Coatings produced by free radical photocure. DOI : 10.1007/s11998-011-9360-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9360-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12594 [article]

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3-méthyl-4-amino-5-mercapto-1,2,4-triazole as corrosion inhibitor for 6061 Al alloy in 0.5 sodium hydroxide solution / P. D. Reena Kumari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 685-695 Titre : 3-méthyl-4-amino-5-mercapto-1,2,4-triazole as corrosion inhibitor for 6061 Al alloy in 0.5 sodium hydroxide solution Type de document : texte imprimé Auteurs : P. D. Reena Kumari, Auteur ; Jagannath Nayak, Auteur ; A. Nityananda Shetty, Auteur Année de publication : 2011 Article en page(s) : p. 685-695 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adsorption Aluminium -- Alliages Anticorrosifs Electrochimie Microscopie électronique à balayage Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : 3-Methyl-4-amino-5-mercapto-1,2,4-triazole (MAMT) was synthesized, and its inhibition action on the corrosion of 6061 Al alloy in 0.5 M sodium hydroxide was investigated by means of potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The effect of inhibitor concentration, temperature, and concentration of the corrosion medium on the inhibitor action was investigated. The surface morphology of the metal surface was investigated by scanning electron microscopy (SEM). The inhibition efficiency increased with the increase in the concentration of the inhibitor, but decreased with the increase in temperature. Both thermodynamic and kinetic parameters were calculated and discussed. The adsorption of MAMT on the base alloy was found to be through physisorption, obeying Langmuir’s adsorption isotherm. The results obtained from both the techniques were in good agreement with each other. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Synthesis of MAMT - Potentiodynamic polarization method - Electrochemical impedance spectroscopy studies (EIS) - Scanning electron microscopy (SEM) analysis - RESULTS AND DISCUSSION : Potentiodynamic polarization method - Effect of temperature - Adsorption behavior - Electrochemical impedance spectroscopy (EIS) studies - Inhibition mechanism - Scanning electron microscopy DOI : 10.1007/s11998-011-9341-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9341-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12595 [article]

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Coating the inner surfaces of pipes with high-viscosity epoxy in annular flow / E. Lin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 697-706 Titre : Coating the inner surfaces of pipes with high-viscosity epoxy in annular flow Type de document : texte imprimé Auteurs : E. Lin, Auteur ; H. B. Parizi, Auteur ; A. Pourmousa, Auteur ; S. Chandra, Auteur ; Javad Mostaghimi, Auteur Année de publication : 2011 Article en page(s) : p. 697-706 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ecoulement annulaire Epoxydes Revêtements:Peinture Simulation par ordinateur Index. décimale : 667.9 Revêtements et enduits Résumé : Applying a thin, protective coating of a nontoxic, chemically resistant epoxy to the interior of existing pipes is an alternative method to pipe replacement. In order to find the controlling parameters in this method, in this study, viscous epoxy was propelled by compressed air through clear polyvinyl chloride (PVC) pipes. Epoxy flow was annular, and it hardened to form a thin, uniform coating on the inner pipe surface. A video camera was employed to record fluid motion, and the thickness of the coating was measured using an image analysis program named ImagJ. Tests were done with varying air temperature, airflow rate, piping configuration, and epoxy temperature. A one-dimensional numerical algorithm was developed to model fluid flow, heat transfer, and epoxy curing. Heating the epoxy makes it move faster because liquid viscosity decreases with increasing temperature. The coating was significantly thicker at the bottom of a horizontal pipe than at the top due to sagging of the epoxy coating after it had been applied, resulting in flow from the top to the bottom of the pipe. Sagging could be reduced by maintaining airflow until curing was almost complete and the epoxy had hardened enough to prevent it from moving easily. The combination of the experimental results and numerical modeling showed that the most important parameters controlling the speed of the epoxy and coating thickness were the air flow rate and temperature, since they determine the shear forces on the epoxy layer and the rate at which the epoxy cures. Raising air temperature increases the reaction rate and therefore decreases the time required for the epoxy to cure inside the pipe. The results of the simulation showed a very good agreement with the experimental results in pipes with 1-in diameter or less. DOI : 10.1007/s11998-011-9361-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9361-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12596 [article]

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On the stability of delamination growth at scratching of thin film structures / Fredrik Wredenberg in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 707-717 Titre : On the stability of delamination growth at scratching of thin film structures Type de document : texte imprimé Auteurs : Fredrik Wredenberg, Auteur ; Per-Lennart Larsson, Auteur Année de publication : 2011 Article en page(s) : p. 707-717 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces -- Stabilité Délaminage Eléments finis, Méthode des Rayures Index. décimale : 667.9 Revêtements et enduits Résumé : Scratching of thin film/substrate structures is studied theoretically and numerically. The results are discussed in connection to delamination initiation and in particular subsequent growth at scratching. The material behavior of the film is described by classical elastoplasticity accounting for large deformations. The deformation of the substrate is neglected indicating that the results are pertinent to soft thin films. The numerical investigation is performed using the finite element method (FEM) and the numerical strategy is discussed in some detail. The results from this study show that delamination growth at thin film scratching is a stable feature with crack arrest occurring at a decreasing load. Note de contenu : - Basic considerations and numerical analysis - Delamination analysis - Results and discussion DOI : 10.1007/s11998-011-9352-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9352-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12597 [article]

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Effect of methyl methacrylate content on coatings’ properties of palm oleic acid-based macromer / Shahla Ataci in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 719-725 Titre : Effect of methyl methacrylate content on coatings’ properties of palm oleic acid-based macromer Type de document : texte imprimé Auteurs : Shahla Ataci, Auteur ; Rosiyah Yahya, Auteur ; Seng Neon Gan, Auteur Année de publication : 2011 Article en page(s) : p. 719-725 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymérisation Fourier, Spectroscopie infrarouge à transformée de Macromolécules -- Synthèse Méthacrylate de méthyle Oléique, Acide L'acide oléique vient du latin oleum et veut dire huile. C'est le plus abondant des acides gras monoinsaturés à chaîne longue dans notre organisme. Sa formule chimique brute est C18H34O2 (ou CH3(CH2)7CH=CH(CH2)7COOH). Son nom IUPAC est acide cis-9-octadécénoïque, et son nom court de lipide est 18:1 cis-9. La forme saturée de cet acide est l'acide stéarique. On le symbolise par les nombres 18:1 pour indiquer qu'il possède 18 atomes de carbone et une liaison éthylénique. Pour indiquer la position de la double liaison, on préfère indiquer le nombre de carbones entre le dernier carbone (n° 18) et le carbone où commence la double liaison (n° 9), d'où 18 - 9, qu'on écrit n - 9, en désignant par n le nombre de carbones de la chaîne. L'acide oléique est donc un acide gras insaturé, plus précisément monoinsaturé. La double liaison agit sur la forme de la molécule et des triglycérides qu’elle forme avec le glycérol. Comme la molécule ne peut pas pivoter autour de C = C, la chaîne est beaucoup moins flexible que l’acide stéarique et ne peut pas former de boule. Les molécules des esters de cet acide sont beaucoup moins compactes que la tristéarine: ces sont des huiles. À la température de notre corps c'est un liquide (huile), qui ne se solidifie qu'à 13,4 °C. Revêtements:Peinture Spectroscopie de la résonance magnétique nucléaire Index. décimale : 667.9 Revêtements et enduits Résumé : The macromer was synthesized using medium oil length oleic acid, phthalic anhydride, and glycerol. The synthesized macromer and methyl methacrylate (MMA) were copolymerized by free radical polymerization in toluene. The ratio between the macromer and MMA changed, and the effects on different properties of the copolymers, such as glass transition temperature (T g) and film properties, were studied. The macromer and copolymer structures were characterized by FTIR and 1H NMR spectroscopies. The coatings prepared with the highest ratio of MMA exhibited better overall physico-chemical properties. Alternatively, Tafel polarization curves showed that the corrosion rate value in NaCl solution decreases significantly when the MMA content is increased. Dynamic mechanical analysis results revealed that the increasing amounts of MMA lead to increasing T g values of copolymers. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Synthesis of macromer - Synthesis of macromer-methyl methacrylate copolymers (MC copolymers) - Characterizations - RESULTS AND DISCUSSION : Infrared spectroscopy - Percentage of swelling in toluene - Evaluation of physico-mechanical characteristics of the copolymers as coating - Tafel polarization - Dynamic mechanical analysis (DMA) DOI : 10.1007/s11998-011-9363-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9363-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12598 [article]

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Effect of TiO2 surface treatment on the mechanical properties of cured epoxy resin / Hamad Al-Turaif in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 727-733 Titre : Effect of TiO2 surface treatment on the mechanical properties of cured epoxy resin Type de document : texte imprimé Auteurs : Hamad Al-Turaif, Auteur Année de publication : 2011 Article en page(s) : p. 727-733 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de titane Epoxydes Particules (matières) Polymères -- Propriétés mécaniques Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Mechanical properties of epoxy resin toughened with two different submicron particles of TiO2 at different weight fractions (1, 3, and 5%, respectively) were investigated. The first TiO2 particles are surface treated with Al2O3–SiO2, and the second are surface treated with Al2O3–ZrO2. The composites were characterized by tensile, flexural, pull off and abrasion tests, followed by X-ray photoelectron spectroscopy and scanning electron spectroscopy of the fracture surfaces. A small amount of TiO2 (~1%) submicron particles improves the flexural, abrasion and pull-off strengths, while amounts up to 5% significantly enhance tensile properties only. TiO2 particles surface treated with Al2O3–ZrO2 produce an epoxy composite with higher strength and weight loss but lower pull off strength and more brittle than that prepared with Al2O3–SiO2 particles. The TiO2 particles surface treated with Al2O3–SiO2 have a higher adherence to the epoxy composite matrix than the particles treated with Al2O3–ZrO2 as shown by scanning electron spectroscopy. Note de contenu : - Materials - Sample preparation - X-ray photoelectron spectroscopy - Tensile test - Flexural test - Abrasion test - Pull-off test - Scanning electron microscopy DOI : 10.1007/s11998-011-9351-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9351-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12599 [article]

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Novel water-dispersible glycidyl carbamate (GC) resins and waterborne amine-cured coatings / Umesh D. Harkal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 735-747 Titre : Novel water-dispersible glycidyl carbamate (GC) resins and waterborne amine-cured coatings Type de document : texte imprimé Auteurs : Umesh D. Harkal, Auteur ; Andrew J. Muehlberg, Auteur ; Peter A. Edwards, Auteur ; Dean C. Webster, Auteur Année de publication : 2011 Article en page(s) : p. 735-747 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbamate de glycidyle Epoxydes Hydrophilie Monte-Carlo, Méthode de Polyuréthanes Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Water-dispersible glycidyl carbamate (GC) functional resins were synthesized and crosslinked using a water-dispersible amine to form coatings. GC functional resins are synthesized by the reaction of an isocyanate functional compound with glycidol to yield a carbamate (urethane) linkage (–NHCO–) and reactive epoxy group. The combination of both functionalities in a single resin structure imparts excellent mechanical and chemical properties to the coatings. Previous studies on the development of GC coatings have focused on solvent-borne coating systems. In this study, GC resins were modified by incorporating nonionic hydrophilic groups to produce water-dispersible resins. To determine the influence of the content of hydrophilic groups on dispersion stability, aqueous dispersions were made from a series of hydrophilically modified GC resins and characterized for particle size and dispersion stability. The composition of a typical, dispersed GC resin particle was predicted using Monte Carlo simulations. Stable GC dispersions were used to prepare amine-cured coatings. The coatings were characterized for solvent resistance, water resistance, hardness, flexibility, adhesion, and surface morphology. It was observed that GC resins were able to be dispersed in water without using any surfactant and by minimal mixing force (hand mixing) and produced coating films with good properties when crosslinked with a compatible waterborne amine crosslinker. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of mPEG-modified GC resins - Characterization - Coating formulation preparation - Coating performance - Differential scanning colorimetry (DSC) - Thermogravimetric analysis (TGA) - Dynamic mechanical analysis (DMA) - Atomic force microscope (AFM) - Salt spray test - RESULTS AND DISCUSSION : Synthesis of water-dispersible GC resins - Dispersion stability - Coating formulations - Water and solvent resistance - Water contact angle - Other coating properties - Further analysis of the coating properties - Thermal stability - Salt spray test DOI : 10.1007/s11998-011-9356-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9356-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12600 [article]

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Nano-crystalline pulsed laser deposition hydroxyapatite thin films on Ti substrate for biomedical application / Adele Carradò in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 749-755 Titre : Nano-crystalline pulsed laser deposition hydroxyapatite thin films on Ti substrate for biomedical application Type de document : texte imprimé Auteurs : Adele Carradò, Auteur Année de publication : 2011 Article en page(s) : p. 749-755 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux Contraintes résiduelles Couches minces Dépôt par laser pulsé Hydroxyapatite L'hydroxyapatite est une espèce minérale de la famille des phosphates, de formule Ca5(PO4)3(OH), usuellement écrite Ca10(PO4)6(OH)2 pour souligner le fait que la maille de la structure cristalline comprend deux molécules. L'hydroxyapatite est le membre hydroxylé du groupe apatite. L'ion OH- peut être remplacé par le fluor, le chlore ou le carbonate. L'hydroxyapatite cristallise dans le système hexagonal. La poudre d'hydroxyapatite pure est blanche. Celles que l'on trouve dans la nature peuvent cependant être de couleur marron, jaune ou verte. Matériaux nanocristallins Microscopie électronique Nanostructures Titane Index. décimale : 667.9 Revêtements et enduits Résumé : Hydroxyapatite (HA) thin coating has been coated on titanium substrates by pulsed laser deposition (PLD). Structural and morphological studies by transmission electron microscopy (TEM) and X-ray diffraction (XRD) were performed. The HA film is polycrystalline and irregular with a range size of particulates from 100 nm to 1 μm. Adhesion of the HA films to the Ti substrates was excellent as observed by cross-scanning electron microscopy (X-SEM) and transmission electron microscopy (XTEM). The residual stresses state determined on uncoated Ti substrates was compressive. After deposition of thin PLD HA on titanium substrates at 400°C the residual stress state was in a very low tensile state. Note de contenu : - Preparation of PLD HA/Ti - Characterization and analysis of PLD HA/Ti DOI : 10.1007/s11998-011-9355-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9355-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12601 [article]

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Facile fabrication of superhydrophobic polysiloxane/magnetite nanocomposite coatings with electromagnetic shielding property / Xiaofeng Ding in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 757-764 Titre : Facile fabrication of superhydrophobic polysiloxane/magnetite nanocomposite coatings with electromagnetic shielding property Type de document : texte imprimé Auteurs : Xiaofeng Ding, Auteur ; Shuxue Zhou, Auteur ; Guangxin Gu, Auteur ; Limin Wu, Auteur Année de publication : 2011 Article en page(s) : p. 757-764 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Blindage (électricité) Champs magnétiques Hydrophobie Magnétite Matériaux hybrides Nanoparticules Revêtements:Peinture 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). Index. décimale : 667.9 Revêtements et enduits Résumé : Superhydrophobic coatings, with a water contact angle (WCA) of 158.3° and a sliding angle of 4.3°, were readily prepared by mixing silicone resin, aminopropyltriethoxysilane and Fe3O4 nanoparticles, and subsequently curing at an ambient temperature. The surface wettability, surface morphology and composition, and long-term durability of the coatings were investigated by WCA analysis, field emission scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and QUV accelerated weathering tests, respectively. The results show that the coatings display a pencil hardness of B, excellent weatherability, and electromagnetic shielding effectiveness beyond 60% in the frequency range of 10–3000 MHz. Note de contenu : - EXPERIMENTAL : Materials - Preparation of polysiloxane/Fe3PO4 nanocomposite coatings - Characterization - RESULTS : Preparation of polysiloxane/Fe3PO4 nanocomposite coatings - Surface wettability - Surface topography - Macro hardness - Weatherability - Electromagnetic interference shielding properties DOI : 10.1007/s11998-011-9358-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9358-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12602 [article]

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Formation of a compact oxide layer on AZ91D magnesium alloy by microarc oxidation via addition of cerium chloride into the MAO electrolyte / M. Laleh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 765-771 Titre : Formation of a compact oxide layer on AZ91D magnesium alloy by microarc oxidation via addition of cerium chloride into the MAO electrolyte Type de document : texte imprimé Auteurs : M. Laleh, Auteur ; Farzad Kargar, Auteur ; Alireza Sabour Rouhaghdam, Auteur Année de publication : 2011 Article en page(s) : p. 765-771 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Revêtement métallique Tags : 'Alliage  magnésium  AZ91D'  'Oxydation  microarc'  Revêtement  CeCl3  Corrosion Index. décimale : 667.9 Revêtements et enduits Résumé : Magnesium and its alloys have been used in many industries, but they are reactive and require protection against aggressive environments. In this study, a compact and relatively pore-free oxide coating was formed on AZ91D magnesium alloy to improve its corrosion resistance by means of the microarc oxidation (MAO) process via the addition of CeCl3 as an additive into the MAO electrolyte. Morphologies and compositions of the coatings were studied with scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. It was found that with the addition of CeCl3 into the MAO electrolyte, the obtained coating showed more uniform morphology compared with the coating produced in the CeCl3 free electrolyte. EDS analysis confirmed the presence of cerium in the coating formed in the electrolyte with CeCl3. Polarization tests results showed that the corrosion current density of the coating formed in the CeCl3 containing electrolyte was less than that of the coating formed in the electrolyte without CeCl3. Furthermore, electrochemical impedance spectroscopy (EIS) tests indicated that the coating formed in the electrolyte with the addition of CeCl3 improved the corrosion resistance of the substrate significantly. Note de contenu : - Microarc oxidation process - Morphologies and compositions of the MAO coatings - Corrosion studies - Porosity measurements of the coatings DOI : 10.1007/s11998-011-9357-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9357-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12603 [article]

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Preparation of a superamphiphobic surface on a common cast iron substrate / Zhiqing Yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 773-777 Titre : Preparation of a superamphiphobic surface on a common cast iron substrate Type de document : texte imprimé Auteurs : Zhiqing Yang, Auteur ; Jiayu Xiao, Auteur ; Chunqi Wang, Auteur ; Jingcheng Zeng, Auteur ; Suli Xing, Auteur ; Jun Liu, Auteur Année de publication : 2011 Article en page(s) : p. 773-777 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Métaux -- Surfaces Revêtements Tags : Revêtement  Superamphiphobique  Superhydrophobique  Superoléophobique  'Angle  contact  'Glissement  angle' Index. décimale : 667.9 Revêtements et enduits Résumé : A superamphiphobic (super-repellent) surface with both water and rapeseed oil contact angle higher than 150° was prepared on a common cast iron substrate. The water and rapeseed oil contact angles were 158 ± 1.9° and 151 ± 1.7°, respectively. The sliding angles of water and rapeseed oil on the superamphiphobic surface were 2° and 16°, respectively. Scanning electron microscope images showed that many interesting microflower-like microstructures comprised many nanorods with the average diameter of about 200 nm, which were distributed on the superamphiphobic cast iron substrate. Each nanorod was composed of many smaller nanostructures and nano particles, which created interesting micro–nano binary structures similar to the surface microstructures of lotus leaves. When kept in an ambient environment for 6 months, no rust was observed on the superamphiphobic cast iron substrate surface, which showed excellent corrosion resistance. DOI : 10.1007/s11998-011-9365-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9365-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12604 [article]

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Improved adhesion of PMSQ hard coatings on polymer substrates / Yu-Chih Kao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 779-783 Titre : Improved adhesion of PMSQ hard coatings on polymer substrates Type de document : texte imprimé Auteurs : Yu-Chih Kao, Auteur ; Chau-Nan Hong, Auteur Année de publication : 2011 Article en page(s) : p. 779-783 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Dureté (matériaux) Hydroxylation 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. Polyméthylsilsesquioxane Revêtements:Peinture Triméthyléthoxysilane Index. décimale : 667.9 Revêtements et enduits Résumé : Various surface treatment methods were investigated to improve the adhesion of abrasion-resistant polymethylsilsesquioxane (PMSQ) coatings on the optical resins. The adhesion of PMSQ films was improved on polymethylmethacrylate (PMMA), polycarbonate (PC), and PC/acrylonitrile butadiene styrene (ABS) by pretreating their surface with O2 plasma or chromic acid followed by surface grafting with trimethyl ethoxysilane (TMES). After the O2 plasma and the subsequent TMES treatments, the adhesion of PMSQ coating on PMMA substrate was significantly enhanced by the reduction of the percentage of peeling area from ~100% to <1% in cross cut tests. After the chromic acid and the subsequent TMES treatments of PC and PC/ABS substrates, the adhesion of PMSQ coatings was also significantly enhanced by reducing the percentages of peeling areas from nearly 100% to 50% and <1%, respectively, for PC and PC/ABS. The PMSQ coating might increase the hardness of the polymer by two to three levels. DOI : 10.1007/s11998-011-9367-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9367-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12605 [article]

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