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JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH . Vol. 10, N° 3Mention de date : 05/2013Paru le : 14/06/2013 |
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Ajouter le résultat dans votre panierShear rate-dependent structure of polymer-stabilized TiO2 dispersions / Antony Van Dyk in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Shear rate-dependent structure of polymer-stabilized TiO2 dispersions Type de document : texte imprimé Auteurs : Antony Van Dyk, Auteur ; Alan Nakatani, Auteur Année de publication : 2013 Article en page(s) : p. 297-303 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents dispersants (chimie)
Cisaillement (mécanique)
Dioxyde de titane
Dispersions et suspensions
Fractale
Neutrons -- Diffusion
Revêtements:Peinture
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Opacity, gloss, stability, color acceptance, and other paint properties depend on the quality of pigment dispersion. We measured the shear rate-dependent structure of titanium dioxide (TiO2) dispersions stabilized with commercial polymer dispersants in water. Two different MW polyacid dispersants and two different MW acrylate copolymers were used in this study. The experiments were conducted at the NIST Center for Neutron Research on the perfect crystal diffractometer for ultra-high resolution small-angle neutron scattering (USANS) measurements. The results for TiO2 scattering and rheology show that shear induced dissociation occurs for certain dispersants and shear induced association of TiO2 clusters is observed for other dispersants. The results suggest new ways to consider dispersant selection for paints and the quality of pigment dispersions. Note de contenu : - Neutron scattering fundamentals
- Materials
- Tio2 ultra small angle scattering
- Quantifying dispersion qualityDOI : 10.1007/s11998-012-9454-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9454-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18723
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Rheological studies of two component high build epoxy and polyurethane based high performance coatings / Ajit Deka in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Rheological studies of two component high build epoxy and polyurethane based high performance coatings Type de document : texte imprimé Auteurs : Ajit Deka, Auteur ; Nirmalya Dey, Auteur Année de publication : 2013 Article en page(s) : p. 305-315 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes
Polyuréthanes
Revêtements bi-composant:Peinture bi-composant
RhéologieIndex. décimale : 667.6 Peintures Résumé : The work presented in this article involves the study of rheometric profile of several rheological additives in two-component (2K) high build epoxy zinc phosphate primer and two-component high build aliphatic polyurethane topcoat. Viscosity profile and thixotropic behavior at different shear rates have been determined for both the paints using Physica MCR 301 Rheometer of Anton Paar. The valuable information derived from these measurements led to better insight into the influence of these rheological additives on important paint properties like flow and leveling, sag control, in-can settling during storage, etc. Rheometric results were also compared with the results obtained during the actual application of these experimental coatings on mild steel panels. From the rheological study it was concluded that the thickeners based on surface-modified clay and organically modified castor oil derivative work well in epoxy zinc phosphate primer whereas polyurea-based thickener showed better results than other rheological additives in the case of the 2K polyurethane system. Measurement of low shear and high shear viscosity response of different thickeners helps in predicting storage and application behavior of these coatings which correlates well with the actual observation. DOI : 10.1007/s11998-012-9445-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9445-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18724
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Comparison of electrolyte effects for poly(3,4-ethylenedioxythiophene) and poly(3-octylthiophene) by electrochemical impedance spectroscopy and polymerization parameters with morphological analyses on coated films / Murat Ates in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Comparison of electrolyte effects for poly(3,4-ethylenedioxythiophene) and poly(3-octylthiophene) by electrochemical impedance spectroscopy and polymerization parameters with morphological analyses on coated films Type de document : texte imprimé Auteurs : Murat Ates, Auteur ; Tolga Karazehir, Auteur ; Fatih Arican, Auteur ; Nuri Eren, Auteur Année de publication : 2013 Article en page(s) : p. 317-330 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Conducteurs organiques
Electrolytes
Electropolymérisation
Microscopie à force atomique
Poly(3,4-éthylènedioxythiophène)
Poly(3-octylthiophène)
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : 3,4-Ethylenedioxythiophene and 3-octylthiophene were electropolymerized on glassy carbon electrodes (GCE) to compare with four different electrolytes [lithium perchlorate (LiClO4), sodium perchlorate, tetraethylammonium tetrafluoroborate, and tetrabutylammonium tetrafluoroborate] in a solvent of acetonitrile (CH3CN). Modified electrodes were characterized by cyclic voltammetry, attenuated total reflectance–Fourier transform IR spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis, atomic force microscopy, and electrochemical impedance spectroscopy (EIS). Nyquist and Bode plots for magnitude, phase, admittance, and capacitance on both polymer-modified electrodes were comparatively investigated in detail. The highest low-frequency capacitance (C LF) and double-layer capacitance (C dl) were obtained in 0.1 M LiClO4/CH3CN for poly(3,4-ethylenedioxythiophene) and poly(octylthiophene)/GCE. EIS data were fitted to the equivalent circuit model of R(Q(R(C(R(C(RW))))))(CR), which is used to investigate circuit parameters. Note de contenu : - EXPERIMENTAL : Materials - Instrumentation - EIS and modeling
- RESULTS AND DISCUSSION : Electropolymerization of EDOT and Oth on CGE - Effect of scan rate in monomer-free solution - FTIR-ATR measurements - SEM measurements - EDX anaysis - AFM measurements - EIS study - Equivalent circuit model evaluationDOI : 10.1007/s11998-012-9448-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9448-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18731
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible High performance moisture cured poly(ether–urethane) amide coatings based on renewable resource (cottonseed oil) / Pawan D. Meshram in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : High performance moisture cured poly(ether–urethane) amide coatings based on renewable resource (cottonseed oil) Type de document : texte imprimé Auteurs : Pawan D. Meshram, Auteur ; Ravindra G. Puri, Auteur ; Amol L. Patil, Auteur ; Vikas V. Gite, Auteur Année de publication : 2013 Article en page(s) : p. 331-338 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Huile de coton
Polyéther bloc amide
Polyéther uréthane
Revêtements:PeintureTags : 'Revêtement haute performance' 'Polyéther-urethane amide' 'Ressource renouvelable' 'Huile végétale' Huile coton' Polyaddition 'Propriétés mécaniques' chimiques' 'Résistance impact' rayure' Flexibilité chimique' Index. décimale : 667.9 Revêtements et enduits Résumé : In this investigation, polyetheramide resin was prepared through the condensation polymerization of N,N-bis (2-hydroxyethyl) cottonseed oil fatty amide (HECOFA) with bisphenol-A. It was further modified by 2,4-toluene diisocyanate (TDI) in 10–30 wt% of polyetheramide to develop a series of moisture curing urethane-modified polyetheramide resins (UMCOPEtA). The synthesized resin was characterized using 1H NMR, 13C NMR, FTIR and solubility in various organic solvents at room temperature. The thermal and curing behavior of the resin was investigated using thermogravimetric analysis and differential scanning calorimetric techniques. The physico-chemical properties such as hydroxyl value, iodine value, specific gravity and mechanical properties like scratch hardness, impact, and flexibility were determined by standard laboratory methods. Coatings of UMCOPEtA resin were prepared on mild steel panels to evaluate chemical resistance performance against acid, alkali, water and xylene. The newly developed UMCOPEtA coatings showed improved hardness, impact, gloss, water and chemical resistance when compared with unmodified polyetheramide coatings, and thus were found to be suitable as a high performance coating material. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of N,N-bis (2-hydroxyethyl) cottonseed oil fatty amide (HECOFA) - Synthesis of cottonseed oil polyeteramid (COPEtA) - Synthesis of urethane-modified polyétheramide (UMCOPEtA) - Preparation and testing of coatings - Characterization
- RESULTS AND DISCUSSION : FTIR spectral analysis - NMR spectral analysis - Physico-chemical characterization - Coating properties - Thermal analysisDOI : 10.1007/s11998-012-9449-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9449-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18732
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Dependence of dirt resistance of steel topcoats on their surface characteristics / Sainan Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Dependence of dirt resistance of steel topcoats on their surface characteristics Type de document : texte imprimé Auteurs : Sainan Li, Auteur ; Guangxin Gu, Auteur ; Shuxue Zhou, Auteur ; Limin Wu, Auteur Année de publication : 2013 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Angle de contact
Hydrophilie
Mouillabilité
Polyfluorure de vinylidène
Résistance à la salissure
Revêtement auto-nettoyant:Peinture auto-nettoyante
Revêtements -- Finition:Peinture -- FinitionIndex. décimale : 667.9 Revêtements et enduits Résumé : Contamination of exterior coatings with dirt is a significant problem in seriously polluted environments. To correlate the dirt resistance of exterior coatings with surface characteristics (wettability, roughness, and composition), steel topcoats were evaluated using both dirt pick-up tests according to a national standard testing method of China (GB/T 9757-2001) and outdoor exposure experiments in Shanghai, China. These topcoats included polyvinylidene fluoride (PVDF) paints with various water contact angles (WCAs), polyurethane (PU) paint, polysiloxane (PSiO) paint, and 2K fluorocarbon (FPU) paint. Opposite dirt resistance results were obtained from these two dirt pick-up methods. In the outdoor exposure experiments, superhydrophilic PVDF paints showed excellent self-cleaning performance and thus superior dirt resistance. Superhydrophobic PVDF paint exhibited self-cleaning performance initially, but became dirty finally due to a piling up of PM2.5 pollutants. PVDF paints with WCAs of 85°–125°, PU, PSiO, and FPU paints all exhibited poor dirt resistance in the outdoor environment. These results indicate that dirt resistance depends on surface wettability and the characteristics of pollutants rather than on the surface roughness and composition. Note de contenu : - EXPERIMENTAL : Preparation of coating panels - Dirt pick-up test in lab - outdoor exposure experiments - Characterization
- RESULTS AND DISCUSSION : The surface characteristics of steel topcoats - Dirt resistance test - Outdoor exposure experiment - Effect of surface wettability - Effect of the type of steel topcoatsDOI : 10.1007/s11998-012-9462-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9462-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18733
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible A new phosphate pretreatment process for adhesive bonding of magnesium AZ31 sheets / Ming-Zhe Bu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : A new phosphate pretreatment process for adhesive bonding of magnesium AZ31 sheets Type de document : texte imprimé Auteurs : Ming-Zhe Bu, Auteur ; Zhong-Xia Liu, Auteur ; Ting-Ting Wan, Auteur ; Pei-Chung Wang, Auteur Année de publication : 2013 Article en page(s) : p. 347-359 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Collage
Durée de vie (Ingénierie)
Magnésium -- Alliages
Phosphate de sodium
Revêtement métalliqueIndex. décimale : 667.9 Revêtements et enduits Résumé : An economic, high efficiency sodium dihydric phosphate surface pretreatment process (SDPT) was developed to improve the adhesive bond performance of 2 mm thick hot-rolled wrought magnesium AZ31 sheets. A phosphating solution with sodium dihydric phosphate (NaH2PO4), additive sodium fluoride (NaF), and accelerator sodium molybdate (Na2MoO4), sodium tungstate (Na2WO4) and potassium nitrate (KNO3) were developed to pretreat the magnesium alloys. The content of sodium dihydric phosphate in the phosphating solution was strictly controlled to insure it supplied sufficient acid radical HPO4 2− to phosphate magnesium AZ31 alloy. Furthermore, a suitable H+ content to keep the pH values in the range of 5–6 for a phosphating solution was necessary. With this SDPT pretreatment process, a coating consisting of the magnesium phosphate, magnesia (MgO), magnesium hydroxide (Mg(OH)2), magnesium fluoride (MgF2) and a minor amount of molybdenum oxide(MoO3) was formed on the surface of the magnesium AZ31. While the SDPT pretreated adhesive-bonded joints had better initial bond strength than phosphate–permanganate process pretreated joints, the corrosion resistance of SDPT pretreated joints was slightly inferior. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Surface pretreatment - Potential vs time - Surface characterization - Adhesive bonding of magnesium AZ31 - Quasi-static testing - Environmental exposure - Hydrogen evolution test
- RESULTS AND DISCUSSION : Formation of phosphate coating - Effect of immersion time on coating appearance and thickness - EDS and XPS analyses phosphate coating - Corrosion of phosphated magnesium 1Z31 - Initial bond strength and durability of phosphated magnesium alloys
DOI : 10.1007/s11998-012-9451-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9451-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18734
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Antigraffiti polyurethane coating containing fluorocarbon side chains grafted polymethylsiloxane / Hu Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Antigraffiti polyurethane coating containing fluorocarbon side chains grafted polymethylsiloxane Type de document : texte imprimé Auteurs : Hu Liu, Auteur ; Baosong Fu, Auteur ; Yi Li, Auteur ; Qianqian Shang, Auteur ; Guomin Xiao, Auteur Année de publication : 2013 Article en page(s) : p. 361-369 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymères greffés
Fluoropolymères
HydrosilylationLa réaction d'hydrosilylation consiste en l'addition d'une fonction hydrogénosilane (Si-H) sur un composé organique insaturé.
Il existe principalement deux méthodes pour mettre en œuvre cette réaction :
La génération de radicaux silyle : thermiquement (300 °C), par irradiation (rayonnement ultraviolet ou par décomposition de peroxydes ou d'azonitriles.
La catalyse par des métaux de transition généralement du groupe VIII. Parmi ces différents catalyseurs employés pour la réaction d'hydrosilylation, les composés à base de platine et plus particulièrement l'acide hexachloroplatinique hexahydraté sont ceux qui présentent la plus grande efficacité1. Ce catalyseur utilisé en très faible quantité et pour des temps de réaction généralement inférieurs à 5 h permet d'atteindre des rendements relativement élevés.
Un mécanisme plus récent de l'hydrosilylation a été proposé dans la thèse de Patrick Cancouët sur un polysiloxane porteur de fonction hydrogénosilanes latérales.
Polyméthylsiloxane
Polyuréthanes
Revêtements anti-graffitisIndex. décimale : 667.9 Revêtements et enduits Résumé : The novel polymethylsiloxane grafted by fluorocarbon side chains was synthesized via hydrosilylation reaction of polymethylhydrosiloxane (PMHS) with 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA) in the presence of Karstedt’s catalyst. The reaction factors of reaction temperature, reaction time, catalyst dosage, solvent dosage, and molar ratio of the reactants were investigated through orthogonal experiments. Under optimal conditions, the grafting ratio of HFBA to PMHS reached 91.6%. The structure of the grafted polymer was characterized by FTIR and 1H NMR spectra. The synthesized polymer was incorporated into two-component polyurethane coating formulations as an additive to prepare antigraffiti coatings. After curing, the contact angle measurement was performed and the results showed that surface free energy of the coating film decreased dramatically from 30.7 to 21.4 mJ/m2. The inks of permanent markers cannot spread readily on the coating film and can be removed easily, indicating that the incorporation of the synthesized polymer endowed the coating with admirable antigraffiti performance. XPS analysis revealed that atomic concentrations of silicon and fluorine near the surface (about 10 nm) were much higher than deeper within the film (about 100 nm), suggesting that these two elements had a strong migration tendency toward the coating–air interface. AFM measurement showed that the inclusion of synthesized polymer in coating did not affect the surface roughness of the film. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of PHMS-graft-HFBA (PSF) - Preparation of antigraffiti polyurethane paints (AGPU) - Characterization
- RESULTS AND DISCUSSION : Orthogonal experiment design for the synthesis of PSF - Structure characterization - Surface properties of coatingsDOI : 10.1007/s11998-012-9452-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9452-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18735
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Preparation, characterization, and antibacterial activity of photocured thymol-doped acrylic resins / Micaela Degli Esposti in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Preparation, characterization, and antibacterial activity of photocured thymol-doped acrylic resins Type de document : texte imprimé Auteurs : Micaela Degli Esposti, Auteur ; Francesco Pilati, Auteur ; Moreno Bondi, Auteur ; Simona de Niederhäusern, Auteur ; Ramona Iseppi, Auteur ; Maurizio Toselli, Auteur Année de publication : 2013 Article en page(s) : p. 371-379 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Caractérisation
Matières plastiques -- Additifs
Photoréticulation
Polyacryliques
ThymolLe thymol est un phénol contenu dans l'huile de thym et dans les huiles essentielles (volatiles) de plusieurs autres plantes. Il se présente sous forme de cristaux incolores avec une odeur aromatique caractéristique. Il est soluble dans les alcools, le gras et l'huile et peu soluble dans l'eau. On l'utilise notamment pour ses propriétés antiseptiques, antibactériennes et antifongiques ainsi que pour stabiliser les préparations pharmaceutiques. (Dorland, 28th ed.).Index. décimale : 667.9 Revêtements et enduits Résumé : This article describes the preparation of thymol-doped acrylic resins by photopolymerization of solutions of thymol in tripropylenglycoldiacrylic monomer. This provides an easy, energy-saving, and environmental friendly process to prepare antibacterial plastics (fulfilling most of the “green chemistry” requirements). The results demonstrate that thymol can be included in the resin even at high concentration (up to 28.6%) without affecting the photocuring reaction and losing transparency. The glass transition temperature of the doped resin decreases when the thymol content increases, as it behaves like a plasticizer with respect to the acrylic resin. As indicated by HPLC analysis, thymol can be released in liquid media at a rate that depends on the chemical nature of the liquid. Evaluation by agar diffusion assays showed an antibacterial activity on both Gram-negative and Gram-positive bacteria (Staphylococcus aureus, Listeria monocytogenes, and Escherichia coli). The antibacterial activity can occur just on the plastic surface when the thymol-doped resins is applied as thin coating, while it is evident also in the surrounding agar medium for doped plastic discs, 1.2 mm thick with a concentration of thymol in the resin higher than 16.7%. Note de contenu : - EXPERIMENTAL : Materials - Preparation of the photocured resins - Characterization of the photocured resins - Thymol-release tests - Antibacterial activity evaluation
- RESULTS AND DISCUSSION : Photocuring reaction of TPGDA - Characterization of the thymol-doped photocured resin - Solvent sorption kinetics and swelling ratio of the TPGDA resin and thymol-release tests - AntibacterialDOI : 10.1007/s11998-012-9453-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9453-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18736
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Development of heat-resistant anticorrosion urethane siloxane paints / Moussa Tamboura in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Development of heat-resistant anticorrosion urethane siloxane paints Type de document : texte imprimé Auteurs : Moussa Tamboura, Auteur ; Anna M. Mikhailova, Auteur ; Meng Qiu Jia, Auteur Année de publication : 2013 Article en page(s) : p. 381-396 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Alumine
Anticorrosifs
Anticorrosion
Couches minces multicouches
Formulation (Génie chimique)
Liants
Microscopie électronique à balayage
Nitrure de silicium
Oxyde de fer micacé
Phosphate de zinc
Pigments
Polyuréthanes
Résistance thermique
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements multicouches
SiliconesLes 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).
Spectroscopie d'impédance électrochimique
ThermogravimétrieIndex. décimale : 667.9 Revêtements et enduits Résumé : Three two-layer heat-resistant and anticorrosion paints have been formulated from urethane siloxane binder and traditional anticorrosion pigments such as micaceous iron oxide (MIO), zinc phosphate (ZP), and aluminum oxide. These pigments were used as the dominant components of different undercoats or topcoats. Heat-resistant pigments such as silicon nitride and glass-spheres were used in the composition of the topcoats. Thermogravimetric analysis of paints shows that the paint with ZP as dominant component of the undercoat have the highest heat-resistance and stability in inert gas and oxygen. The paint with a combination of MIO and ZP has the best hardness as well as the best protective and anticorrosion properties based on the electrochemical impedance spectroscopy. A maximum synergic effect of the properties of pigments seems to appear in this paint. Surface morphology of paints was studied by means of scanning electron microscopy. Heated at different temperatures and for several hours, paint containing MIO as the dominant component in the undercoat exhibits the best mechanical and adhesion properties. Note de contenu : - EXPERIMENTAL : Material - Characterization - Paint formulation
- RESULTS AND DISCUSSION : Chemical resistance, mechanical, and adhesion properties - Thermal properties - Weight loss of PSilPU binder and two-layer AG paints - Surface hardness of two-layer AG paint - Morphology of PSilPU binders and two-layer AG paints - Protective and anticorrosion properties of PSilPU binders and two-layer AG paintsDOI : 10.1007/s11998-012-9464-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9464-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18737
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible The effectiveness of an antifouling compound coating based on a silicone elastomer and colored phosphor powder against Navicula species diatom / Shan Cao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
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Titre : The effectiveness of an antifouling compound coating based on a silicone elastomer and colored phosphor powder against Navicula species diatom Type de document : texte imprimé Auteurs : Shan Cao, Auteur ; Jiadao Wang, Auteur ; Yan Zhang, Auteur ; Darong Chen, Auteur Année de publication : 2013 Article en page(s) : p. 397-406 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diatomées
Elastomères
Phosphore
Poudres
Revêtements antisalissures:Peinture antisalissures
SiliconesLes 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 : Silicone elastomers coatings can “release” fouling organisms and, thus, they are referred to as fouling-release coatings. In this study, compound coatings based on silicone elastomer and various colored glow-in-the-dark phosphor powders were prepared to investigate the initial settlement density and adhesion strength of diatom Navicula sp. on the coatings. It was found that settlement densities on samples with phosphor layers (diatom coverage area on Day 7 was ~30%) were significantly lower than those on samples without phosphor layers (coverage area was ~60%), while both coatings showed similar fouling-release characteristics (~90% of removal at wall shear stress value of 90 Pa). In addition, the phosphor color played an important role in the diatom fouling activities. Those experimental phenomena were partly explained according to surface characteristics and our previous study on the relationship between diatom settlement and light conditions. To sum up, this type of preliminary compound coating could both reduce diatom initial settlement and keep the advantage of fouling release. Note de contenu : - Surface fabrication
- Compound coating characterization
- Plate inoculation and diatom density assays
- Adhesion strength assaysDOI : 10.1007/s11998-012-9457-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9457-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18738
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Bond strength of hybrid sol-gel coatings with different additives / Mousa May in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Bond strength of hybrid sol-gel coatings with different additives Type de document : texte imprimé Auteurs : Mousa May, Auteur ; Heming Wang, Auteur ; Robert Akid, Auteur Année de publication : 2013 Article en page(s) : p. 407-413 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Alumine
Dioxyde de titane
Microscopie
Microscopie électronique à balayage
Nanoparticules
Polyaniline
Revêtements
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : The hybrid sol–gel coating on Al 2024-T3 was modified by adding polyaniline, TiO2, or γ-Al2O3 nanoparticles in the formulation separately. The coating was then used as an adhesive to bond Al 2024-T3 alloys, forming a single lap joint. The bond strength of the sol–gel coating was investigated using a universal tensile test machine. The lap shear strength of the original sol–gel coating was about 1.38 MPa and it was increased up to 2.26 MPa after the modification by adding 0.05 wt% PANI microparticles in the sol–gel coating. The small increase in strength was attributed to an improvement in its adhesive flexibility because of incorporation of the long-chain organic polymer in its structure. Furthermore, the addition of different amounts of TiO2 nanoparticles in the unmodified sol–gel coating also led to an increase in shear strength compared to the undoped sol–gel coating. Typically, a sol–gel coating containing 2.0 wt% of TiO2 recorded the highest adhesive strength of about 4.0 MPa. A similar increase in strength was observed when doping γ-Al2O3 nanoparticles into the original hybrid sol–gel coating. Adding 0.5 wt% of γ-Al2O3 in the sol–gel coating increased the adhesive bonding strength up to 4.48 MPa. The fracture surface of the specimen was separately observed by SEM and Optical Microscopy in order to examine potential evidences of mechanism and nature of failure. The reason why the adhesive strength increased after the modification of the sol–gel coating is discussed in this article. Note de contenu : - EXPERIMENTAL WORK : Materials - Preparation of adhesion samples - Adhesion strength measurements
- RESULTS AND DISCUSSION : Bond strength of hybrid sol-gel coatings
- EFFECTS OF DIFFERENT ADDITIVES ON THE SOL-GEL ADHESIVE STRENGTH : Doping 0.05% PANI - Effects of the addition of TiO2 nanoparticules - Effects of the addition of γ-Al2O3 nanoparticles - FTIR characterization of the fracture surfaceDOI : 10.1007/s11998-012-9450-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9450-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18739
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible A new electroless Ni plating procedure of iodine-treated aramid fiber / Ummul Khair Fatema in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : A new electroless Ni plating procedure of iodine-treated aramid fiber Type de document : texte imprimé Auteurs : Ummul Khair Fatema, Auteur ; Yasuo Gotoh, Auteur Année de publication : 2013 Article en page(s) : p. 415-425 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bains de placage
Conducteurs organiques
Dépôt électrolytique
Fibre aramide
Iode
Métallisation
NickelLe nickel est un élément chimique, de symbole Ni et de numéro atomique 28.
Le nickel est un métal blanc argenté qui possède un éclat poli. Il fait partie du groupe du fer. C'est un métal ductile (malléable). On le trouve sous forme combinée au soufre dans la millérite, à l'arsenic dans la nickéline.
Grâce à sa résistance à l'oxydation et à la corrosion, il est utilisé dans les pièces de monnaie, pour le plaquage du fer, du cuivre, du laiton, dans certaines combinaisons chimiques et dans certains alliages. Il est ferromagnétique, et est fréquemment accompagné de cobalt. Il est particulièrement apprécié pour les alliages qu'il forme.
PolyphénylènetéréphtalamideLe poly(p-phénylènetéréphtalamide) (PPD-T) est un polymère thermoplastique constitué de noyaux aromatiques séparés par des groupes amide. Il appartient à la famille des fibres d'aramides. Le poly-para-phénylène téréphtalamide a été découvert et commercialisé sous le nom déposé de Kevlar.
Revêtement métalliqueIndex. décimale : 667.9 Revêtements et enduits Résumé : A new, durable, etchant- and tin-free catalyzation process was studied for electroless nickel metallization of aramid fiber via iodine pretreatment. Firstly, iodine components were selectively doped onto the inner part of the fiber using vapor iodine exposure followed by treatment with a tin-free acidic palladium chloride solution to form palladium iodide (PdI2) on the fiber surface. After subsequent reduction of PdI2 into metal palladium (Pd), electroless plating was carried out. A uniform Ni plating layer was formed on the fiber surface, which exhibited high durability against resistance tests of ultrasonic exposure, tape peel-off, and corrosion in NaCl solution. Here, Pd particles that formed at the inner part near the fiber surface functioned as an anchor of the plated layer as well as a catalyst of electroless plating. Investigation of the plate bath composition shows that the use of anionic surfactant enhances the adhesion of the plated layer with fiber matrix, while a reducing agent in the plate bath reduces the smoothness of the plated surface. Also, the plate bath pH and the temperature of the plating solution control the layer deposition rate noticeably more than does the plating time. The proposed method retained good tensile strength in the plated fiber. Ni-plated aramid fiber exhibited durable electrical conductivity and magnetic properties. DOI : 10.1007/s11998-012-9441-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9441-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18740
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Migration of hindered amine light stabilizers in automotive clearcoats / Mark E. Nichols in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Migration of hindered amine light stabilizers in automotive clearcoats Type de document : texte imprimé Auteurs : Mark E. Nichols, Auteur ; S. L. Kaberline, Auteur Année de publication : 2013 Article en page(s) : p. 427-432 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Diffusion (physique)
Durée de vie (Ingénierie)
Photostabilité
Polyfluorure de vinylidène
Résistance au rayonnement ultraviolet
Spectrométrie de masse à ionisation secondaire
Stabilisant à la lumière de type amine encombrée
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : The diffusion behavior of two hindered amine light stabilizers (HALS) [bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl)-sebacate and bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-sebacate] in an automotive clearcoat has been quantified via time-of-flight secondary ion mass spectrometry. Diffusion couples made from clearcoats with and without HALS allow for the estimation of the diffusion coefficient of one of the HALS. The high diffusion coefficient of one of the HALS contradicts the presence of HALS gradients in weathered coating systems. This discrepancy is ascribed to a decreasing diffusion coefficient of the HALS in the coating matrix due to a weathering-induced increase in the T g of the clearcoat. Note de contenu : - EXPERIMENTAL : Materials - Diffusion couples - Time-of-flight secondary ion mass spectrometry (TOF-SIMS)
- RESULTS : Sequential layering experiments - Diffusion couple experimentsDOI : 10.1007/s11998-013-9476-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9476-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18741
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible The dependence of pendulum hardness on the thickness of acrylic coating / Xiaoyang Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : The dependence of pendulum hardness on the thickness of acrylic coating Type de document : texte imprimé Auteurs : Xiaoyang Ma, Auteur ; Zemin Qiao, Auteur ; Zhifeng Huang, Auteur ; Xinli Jing, Auteur Année de publication : 2013 Article en page(s) : p. 433-439 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches épaisses
Essai de dureté
Polyacryliques
Revêtements:Peinture
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Pendulum hardness, which is widely used in the characterization of organic coatings, depends greatly on the thickness of the coating. However, it is still unclear whether a qualitative or quantitative relationship exists between pendulum hardness and coating thickness. In the present article, the pendulum hardness values of acrylic coatings with different thicknesses are measured using a König pendulum hardness tester to clarify the dependence of pendulum hardness on thickness of coating. The results show that the pendulum hardness of acrylic coatings decreases gradually with the increasing thickness of coating within a thickness range, and the sensitivity of pendulum hardness to thickness of coating depends greatly on the glass transition temperature of the coatings. An equation suitable for describing the relationship between logarithmic decrement of the amplitude of pendulum's oscillation and thickness of coating is presented, which can separate the contributions of substrate and coating on the logarithmic decrement. This study demonstrates that the measured value of pendulum hardness is not the bulk hardness value for the coating but the representative value of the system consisting of substrate and coating. An excellent correlation between pendulum hardness and thickness of acrylic coatings is obtained, which is fairly supported by the experimental data. Note de contenu : - EXPERIMENTAL : Materials and equipment - Preparation of coatings with different thickness - The measurement of pendulum hardness - The measurement of glass transition temperature
- RESULTS AND DISCUSSION : The calculation of logarithmic decrement of the amplitude of pendulum's oscillation - The relationship between logarithmic decrement and thickness of coating - The relationship between pendulum hardness and thickness of coating - Physical significance of pendulum hardnessDOI : 10.1007/s11998-013-9477-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9477-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18742
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15149 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
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