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Stress development and film formation in multiphase composite latexes / Kyle Price in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 827-839 Titre : Stress development and film formation in multiphase composite latexes Type de document : texte imprimé Auteurs : Kyle Price, Auteur ; Wenjun Wu, Auteur ; Kurt Wood, Auteur ; Stephanie Kong, Auteur ; Alon McCormick, Auteur ; Lorraine F. Francis, Auteur Année de publication : 2014 Article en page(s) : p. 827-839 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des données Caractérisation Composites Core-Shell Cryotechnique Evaluation Formation de film Latex Liants Microscopie électronique à balayage Morphologie (matériaux) Particules -- Morphologie Revêtement -- Séchage:Peinture -- Séchage Index. décimale : 667.9 Revêtements et enduits Résumé : Designed appropriately, multiphase soft-core/hard-shell latex particles can achieve film formation without the addition of a coalescing aid, while preserving sufficient film hardness. Achieving optimal performance in these materials requires an under-standing of how particle morphology affects film formation and stress development in the film. In this study, soft-core/hard-shell latex particles with different shell ratios, core and shell glass transition temperatures(Tgs), and particle sizes (63–177 nm) were synthesized using a two-stage emulsion polymerization. The film formation behavior of the composite particles was investigated with cryogenic scanning electron micro-scopy, atomic force microscopy, and measurements of the minimum film formation temperature (MFFT). Results show that film formation was enhanced for particles with thinner hard shells, smaller particle size, and a smaller difference in Tg between the core and shell polymers. For example, the MFFT decreased and the particle deformation increased for particles with thinner shells and smaller article sizes. Stress development during drying was characterized using a cantilever beam bending technique. A walled cantilever design was used to monitor stress development without the complication of a lateral drying front. The film formation behavior and stress development correlated well with practical paint properties like scrub resistance and gloss. Note de contenu : - EXPERIMENTAL : Binder evaluation - Paint evaluation - Block resistance - Scrub resistance - Data analysis using JMP - Stress measurement - Characterization methods - RESULTS AND DISCUSSION : Particle morphology - Film formation - Stress development - Paint performance DOI : 10.1007/s11998-014-9606-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9606-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22307 [article]

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Mechanical properties of UV-waterborne varnishes reinforced by cellulose nanocrystals / Vahe Vardanyan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 841-852 Titre : Mechanical properties of UV-waterborne varnishes reinforced by cellulose nanocrystals Type de document : texte imprimé Auteurs : Vahe Vardanyan, Auteur ; Bouddah Poaty, Auteur ; Gregory Chauve, Auteur ; Véronic Landry, Auteur ; Tigran Galstian, Auteur ; Bernard Riedl, Auteur Année de publication : 2014 Article en page(s) : p. 841-852 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. Dispersions et suspensions Matériaux nanocristallins Polyuréthanes Traîtements de surface Vernis -- Propriétés mécaniques Vernis en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : There are many instances in the literature of nanocellulose-thermoplastic composites, but there are few studies on coatings reinforced by cellulose nanocrystals (CNCs). The overall objective of this research was to develop organic nanoparticles-reinforced UV-water-based coatings for wood applications and to study the effect, mainly on wear properties, of the final composite coatings. CNC was mixed in the varnishes to improve the mechanical properties of the coatings. One of the key aspects in the technology of nanocomposites remains the dispersion of the nanoparticles within the matrix as well as its affinity with the matrix. To quantify the dispersion, efficient methods of characterization are needed in order to reveal the nanosized particles. In this article, a novel characterization method based on atomic force microscopy was employed to characterize such nanocomposite coatings, by measuring surface nanoroughness, which is clearly correlated with quality of dispersion and mechanical properties. CNC was modified by either alkyl quaternary ammonium bromides or acryloyl chloride. The mechanical properties (abrasion and scratch resistances, hardness and adhesion) were analyzed and compared to the reference varnish without nanoparticles. The modified CNC addition in UV-water-based coatings results in an approximately 30–40% increase in wear resistance (abrasion and scratch), without any loss of appearance. Note de contenu : - INTRODUCTION : Waterborne coating - CNC - CNC dispersion characterization - MATERIALS AND EXPERIMENTAL PROCEDURE : The composition of the formulation - CNC - Surface modification of cellulose nanocrystals - Preparation of formulations and samples - Experimental methods - RESULTS AND DISCUSSION : Coating with unmodified CNC - Effect of surface modification of CNC - Mechanical properties of coatings DOI : 10.1007/s11998-014-9598-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9598-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22308 [article]

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Derivation of an instrumentally based geometric appearance index for the automotive industry / Fereshteh Mirjalili in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 853-864 Titre : Derivation of an instrumentally based geometric appearance index for the automotive industry Type de document : texte imprimé Auteurs : Fereshteh Mirjalili, Auteur ; Siamak Moradian, Auteur ; Farhad Ameri, Auteur Année de publication : 2014 Article en page(s) : p. 853-864 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Vernis Brillance (optique) Evaluation visuelle Imagerie (technique) Vernis -- Défauts Index. décimale : 667.9 Revêtements et enduits Résumé : In the present study, attempts were made to develop an index of geometric appearance capable of accurately predicting and quantifying the visually perceived geometric aspects of appearance of achromatic automotive finishes. To this end, three previously prepared individual scales for the three most significant geometric appearance attributes, namely specular gloss, distinctness of image (DOI), and orange peel for each of a series of metallic black, metallic gray, metallic silver, and solid white automotive finishes were utilized. The differences in each attribute were quantified visually by a panel of 16 observers, in terms of a lightness difference of an also previously prepared lightness scale. The innovative use of a common lightness scale showed that there is a surprisingly good correlation between the instrumentally measured specular gloss, DOI, and the LW parameter of the Wave scan instrument and the corresponding visually evaluated equivalents at the four investigated achromatic levels through minimizing observer errors and enhancing accuracy of the perceptibility procedure. These high accuracies made provisions for the implementation of the principle of additivity which led to the derivation of a geometric appearance index (GAI). However, before its derivation, one instrumentally measured parameter was remodeled exponentially to define an innovative parameter chosen to be named "percent absence of orange peel". The proposed GAI illustrates high correlation with visual assessments and is herewith recommended as a stand-alone index for predicting the geometric appearance of automotive finishes. Furthermore, this index together with a chromatic appearance index could form the foundation for deriving a total appearance index for the automotive industry. Note de contenu : - Preparation of appearance attribute scales - Instrumental characterization - The design common lightness scale for visual assessments DOI : 10.1007/s11998-014-9608-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9608-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22309 [article]

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Self-stratifying coatings based on Schiff base epoxy resins / Ewa Langer in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 865-872 Titre : Self-stratifying coatings based on Schiff base epoxy resins Type de document : texte imprimé Auteurs : Ewa Langer, Auteur ; Sylwia Waskiewicz, Auteur ; Helena Kuczynska, Auteur ; Grazyna Kaminska-Bach, Auteur Année de publication : 2014 Article en page(s) : p. 865-872 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces multicouches Epoxydes Revêtements autostratifiants:Peinture autostratifiante Schiff, Base de Une base de Schiff, nommé d'après Hugo Schiff, est un composé comportant une double liaison C-N avec l'atome d'azote lié à un groupe aryle ou alkyle, et pas un hydrogène : ce sont donc les imines secondaires. Les bases de Schiff au sens large ont une formule générale de type R1R2C=NR3, où R est une chaine organique. Dans cette définition, base de Schiff est synonyme d'azométhine. Certains restreignent la définition aux aldimines secondaires (azométhines ou le carbone n'est lié qu'à un seul hydrogène), et ont donc pour formule générale RCH=NR'. La chaine carbonée sur l'atome d'azote fait des bases de Schiff une imine stable. Les bases de Schiff dérivées de l'aniline, où R3 est donc un phényle ou un phényle substitué sont appelés aniles. Index. décimale : 667.9 Revêtements et enduits Résumé : Schiff base epoxy resin was used as a component of self-stratifying compositions, in which different acrylic resins were used. The degree of stratification was determined using the ATR FTIR spectroscopy and microscopy technique. Results were compared with those for commercial epoxy resins with a comparable epoxy number. A determination was made of the mechanical properties of the coatings obtained. Based on the previous studies, it was concluded that Schiff base epoxy resin in a film-forming composition behaves in a similar manner to BPA-based epoxy resins. The best mechanical properties and a high degree of stratification were achieved using a Schiff base epoxy resin/poly(isobutyl methacrylate) composition. Use of a self-stratifying composition not only reduces the time and cost of preparing a multilayer coating system, thanks to the formation of two layers in one application, but also causes the Schiff based epoxy coatings to become more flexible. Note de contenu : - Materials characterization - Preparation of N,N'-bis(2-hydroxubenzylidiene)-4-4'-oxydianiline - Preparation of the epoxy resins bearing azomethine groups - Preparation of samples - Test methods used in investigations DOI : 10.1007/s11998-014-9603-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9603-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22310 [article]

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Synthesis and radiation curing of acrylated castor oil glycerides / René Müller in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 873-882 Titre : Synthesis and radiation curing of acrylated castor oil glycerides Type de document : texte imprimé Auteurs : René Müller, Auteur ; Guido Wilke, Auteur Année de publication : 2014 Article en page(s) : p. 873-882 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux Calcul Caractérisation Esterification Huile de ricin et constituants Liants Matières premières Photoréticulation Ressources renouvelables Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet Viscosimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : Synthesis and UV-curing of acrylated castor oil glycerides are described. Transesterification of castor oil with specific amounts of glycerol followed by conversion to castor oil acrylate esters lead to UV-curable binders with variable functionality per mass. The used raw materials are renewable, so that 100% bio-based resins can be obtained with this method. A possible purpose for these reactive binders is to balance the mechanical properties of hard radiation curable coatings. Note de contenu : - MATERIALS AND METHODS : Raw materials - Resin characterization - Preparation methods - Reference materials - Coating film characterization - Calculation - RESULTS : Infrared spectroscopy - Viscosimetry DOI : 10.1007/s11998-014-9596-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9596-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22311 [article]

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Electrochemical behavior of hydrophobic silane–zeolite coatings for corrosion protection of aluminum substrate / Luigi Calabrese in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 883-898 Titre : Electrochemical behavior of hydrophobic silane–zeolite coatings for corrosion protection of aluminum substrate Type de document : texte imprimé Auteurs : Luigi Calabrese, Auteur ; Lucio Bonaccorsi, Auteur ; Angela Caprì, Auteur ; Edoardo Proverbio, Auteur Année de publication : 2014 Article en page(s) : p. 883-898 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Caractérisation Electrochimie Hydrophobie Revêtements:Peinture Silanes Zéolites Index. décimale : 667.9 Revêtements et enduits Résumé : The anticorrosive properties of a silane–zeolite composite coating applied on a 6061 aluminum substrate was investigated. The composite film, deposited by dip-coating technique, was prepared with different contents of SAPO34 powder (60–90 wt%) with the purpose of evaluating the protective action offered by the zeolite-filled silane matrix. Corrosion protection performance, during immersion in 3.5% NaCl solution, was evaluated by means of a potentio-dynamic polarization test and electrochemical impedance spectroscopy (EIS). The coating evidenced good barrier properties and high hydrophobicity. The addition of zeolite in the silane matrix induced, as expected, a reduction of cathodic and anodic current. The zeolite improved the barrier properties of the hybrid sol–gel films, enhancing the resistance to localized corrosion attacks. Better results were observed for the sample with 80 wt% of zeolite filler that evidenced still acceptable protective action after 3 days of immersion in the sodium chloride solution. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Sample preparation - Contact angle measurement - Electrochemical test - RESULTS AND DISCUSSION : Morphology of silane-zeolite composite coating - Wettability - Potentiodynamic test - Electrochemical impedance spectroscopy test - Models of degradation mechanisms of composite coating at long immersion time DOI : 10.1007/s11998-014-9597-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9597-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22312 [article]

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Gas transport properties in waterborne polymer nanocomposite coatings containing organomodified clays / M. Stratigaki in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 899-911 Titre : Gas transport properties in waterborne polymer nanocomposite coatings containing organomodified clays Type de document : texte imprimé Auteurs : M. Stratigaki, Auteur ; G. Choudalakis, Auteur ; A. D. Gotsis, Auteur Année de publication : 2014 Article en page(s) : p. 899-911 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile Diffusion (physique) Exfoliation Gaz Matériaux hybrides Montmorillonite Perméabilité Polyacryliques Polyuréthanes Revêtements en phase aqueuse:Peinture en phase aqueuse Solubilité Index. décimale : 667.9 Revêtements et enduits Résumé : Nanostructured composite coatings, consisting of phylosilicates embedded within polymer matrices, were prepared and characterized. Waterborne acrylic and polyurethane resins were employed as matrix, and hydrophilic or organically modified nanoparticles of montmorillonite as reinforcement. Emphasis in this article is put on the preparation of the coating. An overview of the major steps involved is presented. The choice of a suitable solvent for the preparation stage is based on the values of the solubility parameters of the constituents. The characterization techniques that are used include X-ray diffraction analysis, gas permeation measurements, and IR spectroscopy. The results highlight the significance of the selection of appropriate ingredients and the knowledge of the interactions between the clay particles, the organic matrix, and the solvents used for the preparation of the coating. Note de contenu : - Film formation of a waterbone nanocomposite coating - EXPERIMENTAL : Materials - Sample preparation - Sample characterization - RESULS AND DISCUSSION : The structure of the nanocomposites - IR analysis - The effect of the clays on COâ‚‚ gas diffusion - The compatibility of suspension media and organomodified clays DOI : 10.1007/s11998-014-9594-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9594-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22313 [article]

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Surface properties of alicyclic epoxy coatings modified with reactive copolymer containing fluorinated side chains / Mitsukazu Ochi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 913-921 Titre : Surface properties of alicyclic epoxy coatings modified with reactive copolymer containing fluorinated side chains Type de document : texte imprimé Auteurs : Mitsukazu Ochi, Auteur ; Natsuko Ichikawa, Auteur ; Ryou Shiota, Auteur ; Yoshiki Hattori, Auteur ; Miyuki Harada, Auteur ; Masanao Hara, Auteur ; Hiroshi Uchida, Auteur Année de publication : 2014 Article en page(s) : p. 913-921 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxy alicyclique Réfraction, Indice de Traîtements de surface Transparence (optique) Index. décimale : 667.9 Revêtements et enduits Résumé : An alicyclic epoxy resin was modified with a copolymer having both a perfluoroalkyl side chain and a cyclohexenoxide-terminated side chain. The copolymer had a good solubility in the epoxy matrix during the reaction of the alicyclic epoxy groups on the terminal end of the side chains. Thus, the cured epoxy resin had a homogeneous phase structure and was a colorless material with excellent transparency. The fluorinated side chains were highly self-segregated in the air-side surface (thickness : less than 8 nm) to minimize the interfacial free energy between the air and cured epoxy resin. The surface of the epoxy coatings had a significantly low surface free energy (ca. 20 mJ/m2) and revealed both high hydro- and oleophobicities. In addition, the surface had a gradient in the refractive index due to the self-stratification of the C–F bond that has a low polarizability. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of CEA/PFHE copolymer - Curing of epoxy resin - Measurements - RESULTS AND DISCUSSION : Dynamic properties of cured resins modified with fluorinated copolymer - Surface properties of cured resins modified with fluorinated copolymer - Depth profile analysis of fluorine atom concentration and refractive index of the cured alicyclic epoxy resin surface - Immersion in distilled water as a polar solvent DOI : 10.1007/s11998-014-9604-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9604-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22314 [article]

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Preparation and characterization of acrylic resin/protein composite crosslinked films / X. H. Qiang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 923-931 Titre : Preparation and characterization of acrylic resin/protein composite crosslinked films Type de document : texte imprimé Auteurs : X. H. Qiang, Auteur ; Q. Xue, Auteur ; H. Zhang, Auteur ; Z. Yan, Auteur ; M. Li, Auteur ; W. Xu, Auteur ; Y. J. Wang, Auteur Année de publication : 2014 Article en page(s) : p. 923-931 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages. Couches minces Polyacryliques Protéines Revêtements -- Propriétés chimiques:Peinture -- Propriétés chimiques Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Traction (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : A series of ambient self-crosslinkable acrylic resin/protein composite emulsions (PA–Ps) were prepared by copolymerizing the functional monomer acetyl acetylethyl methacrylate (AAEM) with methyl acrylate, butyl acrylate and acrylic acid, and then protein crosslinking agents such as gelatin and casein were also added. The PA–P films were characterized by Fourier transform IR spectroscopy, contact angles, differential scanning calorimeter, thermogravimetric analysis, antisolvent testing and physicomechanical testing. Influences of AAEM and protein dosages on properties of composite films were examined in detail. The results indicate that influences of AAEM and protein on PA–P films are diverse on solvent resistance, physicomechanical properties and thermal properties. With enhancement of AAEM and protein dosages, hardness, solvent resistance to tetrahydrofuran and glass transition temperature (Tg) of PA–P films are markedly enhanced, but the decomposing temperatures (Td) are decreased. Tensile strengths are evidently reinforced while elongations at break are lessened. Suitable AAEM and protein dosages could render PA–P films with good water resistance. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of acrylic resin/protein composite crosslinked films - Characterization and performance tests of acrylic resin/protein composite films - RESULTS AND DISCUSSIONS : Mechanism ans characterization of crosslinking - Hardness, appearance and tackiness of the film - Water absorption rate - Solvent resistance - Mechanical properties - Thermal properties of the prepared films DOI : 10.1007/s11998-014-9599-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9599-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22315 [article]

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Comparative examination of adhesive and cohesive properties of fluorinated coatings on stone/tile surfaces / Hau-Nan Lee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 933-942 Titre : Comparative examination of adhesive and cohesive properties of fluorinated coatings on stone/tile surfaces Type de document : texte imprimé Auteurs : Hau-Nan Lee, Auteur ; Anilkumar Raghavanpillai, Auteur ; Jing Li, Auteur ; Joel M. Pollino, Auteur ; Brad M. Rosen, Auteur ; Siddhartha R. Shenoy, Auteur Année de publication : 2014 Article en page(s) : p. 933-942 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Délaminage Durée de vie (Ingénierie) Essais de résilience Fluoropolymères Microscopie à force atomique Phosphate fluoré Pierre Rayures Revêtements protecteurs Rupture (mécanique) Tuiles Index. décimale : 667.9 Revêtements et enduits Résumé : A NanoScratch methodology was used to evaluate the relative adhesive and cohesive strength of fluorinated poly(methyl methacrylate-co-methacrylic acid) and fluorinated phosphate coatings on stone and tile surfaces. In general, all coatings showed ability to bind to the stone and tile surfaces, and polymer-based coatings expressed stronger adhesion compared to a small-molecule fluorinated phosphate coating. Also, anionic fluorinated polymers containing methacrylic acid (MAA) residues in the ammonium carboxylate form adhered more strongly compared to corresponding acidic polymer counterparts. In addition, anionic fluorinated polymers, shown to adhere more strongly to granite than marble, possibly due to strong Lewis acid-base interaction between carboxylate and aluminosilicates. Conversely, the fluorinated polymers, bearing the MAA side-chains in their free-acid form, bound more strongly to marble via possible Brønsted acid-base interactions between carboxylic acid and calcium carbonate. Lastly, in most cases, comparable fracture thresholds were observed for the same coating material on different substrates. This was expected since fracture threshold is a measure of the mechanical strength of the coating material, independent of the substrate difference. Note de contenu : - EXPERIMENTAL : Materials - Preparation of coating candidates - Preparation of coatings on the substrates - NanoScratch test - AFM intrumentation - RESULTS AND DISCUSSION : Experimental design - Substrate characterization - Coating characterization - NanoScratch results DOI : 10.1007/s11998-014-9607-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9607-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22316 [article]

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Coatings with metallic effect pigments for antimicrobial and conductive coating of textiles with electromagnetic shielding properties / Kristin Topp in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 943-957 Titre : Coatings with metallic effect pigments for antimicrobial and conductive coating of textiles with electromagnetic shielding properties Type de document : texte imprimé Auteurs : Kristin Topp, Auteur ; Hajo Haase, Auteur ; Christoph Degen, Auteur ; Gerhard Illing, Auteur ; Boris Mahltig, Auteur Année de publication : 2014 Article en page(s) : p. 943-957 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Argent Conducteurs organiques Cuivre Pigments métalliques Index. décimale : 667.9 Revêtements et enduits Résumé : Effect pigments were originally developed to realize advanced optical effects by coating on several types of material surfaces. However, metallic effect pigments are expected to be valuable for many other applications, such as antimicrobial effects, electrical conductive coatings, or shielding against radio waves (electromagnetic shielding). Accordingly, the aim of this article is to evaluate the advanced properties which can be realized by application of coatings containing metallic effect pigments onto textile materials leading to new functional textiles. In total, four different metallic effect pigments were investigated and compared to silver and graphite pigments. By application of coatings with copper- or silver-containing effect pigments significant antibacterial properties against E.coli and S.aureus can be realized. To achieve electric conductive textiles, which also enable effective shielding against radio waves, a copper pigment carrying a silver coating leads to the best properties. Altogether, an effective coating method is presented to achieve functional textiles that offer a broad range of possible applications. Note de contenu : - EXPERIMENTAL : Materials - Sample preparatione - Analytical methods - RESULTS AND DISCUSSION : Material properties of pigment containing coatings - Antimicrobial porperties - Electrical properties - Shielding properties DOI : 10.1007/s11998-014-9605-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9605-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22317 [article]

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Kinetics and effect of surfactant and cosurfactant on miniemulsion polymerization of acrylate monomers / Hongqiang Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 959-966 Titre : Kinetics and effect of surfactant and cosurfactant on miniemulsion polymerization of acrylate monomers Type de document : texte imprimé Auteurs : Hongqiang Li, Auteur ; Xiaokang Ren, Auteur ; Xuejun Lai, Auteur ; Xingrong Zeng, Auteur Année de publication : 2014 Article en page(s) : p. 959-966 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Latex Miniémulsions Nucléation Polyacrylates Polymérisation en émulsion Surfactants Index. décimale : 667.9 Revêtements et enduits Résumé : The effects of the type and amount of the surfactant and cosurfactant on the miniemulsion polymerization of acrylate monomers were studied, and the comparison of the kinetics between miniemulsion polymerization and conventional emulsion polymerization was discussed in the presence of reactive surfactant allyloxy nonylphenol propyl polyoxyethylene (10), ether sulfate (DNS-86), and reactive cosurfactant stearyl methacrylate (SMA). The results showed that the obtained polyacrylate miniemulsion had a high monomer conversion rate and a low coagulum fraction, which were affected little by the surfactant and cosurfactant type. When the surfactant and cosurfactant amounts were all 2 wt%, the contact angle of the prepared polyacrylate miniemulsion with DNS-86/SMA and the water absorption fraction of the latex film were 39° and 8.3 wt%, respectively. FTIR results confirmed that DNS-86 and SMA took part in the polymerization of acrylate monomers. In the miniemulsion polymerization of acrylate monomers with DNS-86/SMA, monomer droplet nucleation was the main nucleation style. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of polyacrylate miniemulsion - Characterization - RESULTS AND DISCUSSION : Effect of surfactant on miniemulsion polymerization - Effect of cosurfactant on miniemulssion polymerization - Comparison of the kinetics of miniemulsion polymerization and conventional emulsion polymerization - FTIR analysis - Effect of SDS/HD ans DNS-86/SMA on the contact angle of polyacrylate miniemulsion and the water absorption fraction of latex film DOI : 10.1007/s11998-014-9601-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9601-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22318 [article]

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The effect of zirconia ions on corrosion performance of sol–gel coated galvanized steel / Akshya Kumar Guin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 967-977 Titre : The effect of zirconia ions on corrosion performance of sol–gel coated galvanized steel Type de document : texte imprimé Auteurs : Akshya Kumar Guin, Auteur ; Manish Bhadu, Auteur ; Mohua Sinhababu, Auteur ; G. Udayabhanu, Auteur Année de publication : 2014 Article en page(s) : p. 967-977 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosion Essais de brouillard salin Polarisation (électricité) Polymères Sol-gel, Procédé Spectroscopie d'impédance électrochimique Zircone Le dioxyde de zirconium ou oxyde de zirconium(IV) couramment appelée zircone est un composé inorganique du zirconium de formule ZrO2. Ce matériau est une céramique technique d'aspect opaque. Appelé CZ (Cubic Zirconia) lorsque transparent, il est utilisé pour imiter le diamant. Il ne faut pas le confondre avec le zircon (ZrSiO4). Sous sa forme tétragonale, l'oxyde de zirconium est un matériau a vocation mécanique, cette évolution cristallographique lui confère une dureté très élevée (1200Hv) ainsi qu'une bonne résistance aux sollicitations mécaniques (700Mpa en traction et 2000Mpa en compression). Une fois polie, la zircone tétragonale peut atteindre un Ra de 0,02, ce qui permet de l'utiliser pour des pièces de frottement. Index. décimale : 667.9 Revêtements et enduits Résumé : Currently, galvanized steel is treated with hexavalent chrome passivation. Sol–gel coating has been found to be a potential replacement for the hazardous hexavalent chrome passivation treatment. The aim of this work is to study the effect of zirconyl nitrate on corrosion behavior of sol–gel coating. Aminopropyl-trimethoxysilane and 3-glycidoxypropyltrimethoxysilane were employed as precursors to prepare the sol–gel-based silane coating. The sol–gel film was deposited on galvanized steel sheet by dip coating method. The chemical properties of sol–gel solution and coated films were analyzed by infrared spectroscopy. Morphology of the film was characterized by scanning electron microscope. The corrosion resistance of the coated samples was evaluated by electrochemical impedance spectroscopy, potentiodynamic polarization curve, and salt spray test. The results indicated that zirconia-doped coatings have better corrosion resistance in comparison with their undoped counterparts. The coating doped with 0.5% zirconyl nitrate provides better corrosion protection due to the inhibitive action of zirconia ion. Note de contenu : - EXPERIMENTAL : Materials and reagents - Preparation of coatings - Measurements - RESULTS AND DISCUSSION : FTIR analysis - SEM micrograph - Surface roughness - Salt spray study (ASTM B-117) - Polarization study - Electrochemical impedance (EIS) study DOI : 10.1007/s11998-014-9602-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9602-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22319 [article]

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Application of CuCoMnOx coat by sol gel technique on aluminum and copper substrates for solar absorber application / Nahed El Mahallawy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 979-991 Titre : Application of CuCoMnOx coat by sol gel technique on aluminum and copper substrates for solar absorber application Type de document : texte imprimé Auteurs : Nahed El Mahallawy, Auteur ; Madiha Shoeib, Auteur ; Yehia Ali, Auteur Année de publication : 2014 Article en page(s) : p. 979-991 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cobalt Complexes métalliques Cuivre Manganèse Revêtement métallique Revêtements -- Propriétés optiques Sol-gel, Procédé Surfaces (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Solar thermal heaters are used widely in domestic and industrial applications. The main part of solar thermal heaters is the absorber surface which must have a maximum absorptivity (α) and minimum emissivity (ε) of solar radiation. This is achieved by application of selective coating on the absorber surface. In the present work, solar selective CuCoMnO x spinel films are deposited by sol gel technique using a dip-coating technique on copper and aluminum sheets. The precursor’s ratio Co:Cu:Mn applied is 1:3:3. Different precursor molar ratios were combined with a fixed amount of solvents for the coating process. Process parameters such as withdrawal rate, heat treatment, and substrate materials on the coat characteristics and optical properties were studied. The coated metallic samples were heat treated at 450°C for 30 min in the case of aluminum and at 200°C at different times in the case of copper. Optical properties of the coatings, namely absorptivity (α) and emissivity (ε) were measured and the deposition process parameters were optimized in order to produce the maximum selectivity (α/ε) values. The deposition parameters were found to influence both the thickness and surface roughness of the coatings. As the coating thickness decreases, the absorptivity increases while the emissivity decreases irrespective of the substrate material. It was also observed from the results that when applying the coat on aluminum substrates, a maximum selectivity value of (α/ε) = 31 was realized while for the copper substrates a maximum value of (α/ε) = 81.8 was obtained. The deposited coatings were analyzed using SEM, XRD, and AFM. Note de contenu : - METHODOLOGY - RESULTS AND DISCUSSION : Effect of different solution concentrations on optical properties of coated aluminium - EFFECT OF HEAT TREATMENT TIME ON COPPER-COATED SAMPLES : Effect of treatment time on coat optical properties - Effect of coat thickness on optical properties of copper-coated samples - EFFECT OF WITHDRAWAL RATE ON OPTICAL PROPERTIES OF COPPER AND ALUMINUM SUBSTRATES - EFFECT OF COAT THICKNESS AND ROUGHNESS ON OPTICAL PROPERTIES - SURFACE CHARACTERIZATION OF THE COAT DOI : 10.1007/s11998-014-9592-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9592-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22320 [article]

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Wood surfaces protected with transparent multilayer UV-cured coatings reinforced with nanosilica and nanoclay. Part II : Application of a standardized test method to study the effect of relative humidity on scratch resistance / William Nguegang Nkeuwa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 993-1011 Titre : Wood surfaces protected with transparent multilayer UV-cured coatings reinforced with nanosilica and nanoclay. Part II : Application of a standardized test method to study the effect of relative humidity on scratch resistance Type de document : texte imprimé Auteurs : William Nguegang Nkeuwa, Auteur ; Bernard Riedl, Auteur ; Véronic Landry, Auteur Année de publication : 2014 Article en page(s) : p. 993-1011 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Air -- Humidité Argile Bois Bois -- Revêtements Caractérisation Essais (technologie) Essais de résilience Evaluation Nanoparticules Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet Revêtements multicouches 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. Statistique Index. décimale : 667.9 Revêtements et enduits Résumé : Coated wood surfaces of components constituting flooring and furniture for interior end uses that exhibit good tribological properties are highly desirable. Surfaces of yellow birch wood (Betula alleghaniensis Britton) were protected with six different types of multilayer coatings (MCs) developed in this study. Each MC consisted of three layers: primer, sealer, and topcoat. UV-curable primer and topcoat formulations were, respectively, reinforced with a hydrophobic fumed silica (NS: 0 and 0.5 wt% in the formulation) and nanoclay (NC: 0, 1, and 3 wt% in the formulation). The scratch resistance of MCs on wood surfaces conditioned at 40% and 80% relative humidity (RH) was quantitatively and qualitatively studied. Quantitative evaluation was performed according to a standardized scratch test, while scanning electron microscopy (SEM) analysis was used for qualitative evaluation. Statistical results have shown that NS, NC, and NS × NC do not have a significant effect on scratch resistance of coated wood surfaces, whereas the effect of RH is significant. Regardless of RH, SEM images reveal that: (i) there is no sign of lack of adhesion between coating layers and the MCs/wood surfaces interface and (ii) all the MCs seem to have a ductile/brittle response to scratching. Qualitative information was in accordance with quantitative results. Note de contenu : - EXPERIMENTAL : Materials - Statistical design - Wood surface preparation - Formulations application and UV-curing processes - Preparation and conditioning of coated wood samples - Characterization - Statistical analysis - RESULTS AND DISCUSSION : Quantitative evaluation of scratch resistance of multilayer coatings on wood surfaces - Qualitative evaluation of scratch resistance of multilayer coatings on wood surfaces DOI : 10.1007/s11998-014-9609-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9609-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22321 [article]

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The effect of TiO2, pigmentation on the hydrolysis of amino resin crosslinked epoxy can coatings / Saminu Musa Magami in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 1013-1022 Titre : The effect of TiO2, pigmentation on the hydrolysis of amino resin crosslinked epoxy can coatings Type de document : texte imprimé Auteurs : Saminu Musa Magami, Auteur ; Peter K. T. Oldring, Auteur ; Laurence Castle, Auteur ; James Thomas Guthrie, Auteur Année de publication : 2014 Article en page(s) : p. 1013-1022 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydrides Can coating Dioxyde de titane Epoxydes Hydrolyse 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. Réticulants Index. décimale : 667.9 Revêtements et enduits Résumé : Pigmented (TiO2), amino resin crosslinked coatings, designed for applications in can coatings’ internal lacquers, were formulated, characterized, applied, and cured. Three grades of a pigmentary form of TiO2 were characterized in terms of their particle size, their particle morphology, their zeta potential, and their moisture retention behavior. Epoxy coatings that were crosslinked using one of several, different amino crosslinkers were prepared. The effect of the presence of the TiO2 pigments on the hydrolysis of the cured coatings was monitored via the controlled retorting of the coatings. The different grades of TiO2 pigment were selected, to establish whether or not they could be used interchangeably with respect to hydrolysis and to melamine release. Also, the effects of the aging of the fluid coatings on the amount of melamine released from the coatings (after curing and retorting) were monitored. Storage under laboratory conditions for 2, 20, and 40 weeks was used for this purpose. The TiO2 pigment contributed significantly to the hydrolysis behavior of the epoxy coatings in that their presence substantially reduced the amount of melamine released and the extent of crosslinker hydrolysis. Typical results show that excluding the TiO2 pigment particles from the formulation results in there being 50% more hydrolysis of the crosslinker to melamine. With respect to the melamine release and crosslinker hydrolysis, the different grades of the pigment gave similar results. Note de contenu : - MATERIALS : Analysis of TiO2 - Preparation of the "model" epoxy-anhydride coatings - Coating application and curing - Surface microscopy of coatings and contact angle studies : epoxy-anhydride coatings - Retort of coatings/hydrolysis tests : epoxy-anhydride coatings - Determination of the melamine released by the epoxy-anhydride coatings - RESULTS AND DISCUSSION : Behavior of the TiO2 pigment species - Effect of pigmentary TiO2 on the hydrolysis of cured epoxy-anhydride coatings to melamine DOI : 10.1007/s11998-014-9610-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9610-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22357 [article]

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On the potential of mean force of a sterically stabilized dispersion / R. Catarino Centeno in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 1023-1031 Titre : On the potential of mean force of a sterically stabilized dispersion Type de document : texte imprimé Auteurs : R. Catarino Centeno, Auteur ; E. Perez, Auteur ; Armando Gama Goicochea, Auteur Année de publication : 2014 Article en page(s) : p. 1023-1031 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colloides Dioxyde de titane Dispersions et suspensions -- Stabilité Dynamique moléculaire Polymères ramifiés Thermochimie Index. décimale : 667.9 Revêtements et enduits Résumé : The potential of mean force (PMF) is the total free energy of a many-body colloidal system, and consequently it includes all the interactions the colloids experience due to collisions with themselves and with the solvent. Here, the PMF of a colloidal dispersion under various circumstances of current interest, such as varying solvent quality, polymer coating thickness, and addition of electrostatic interaction, is obtained from radial distribution functions available from the literature. They are based on implicit-solvent, computer simulation studies of a model TiO2 dispersion that takes into account three major components to the interaction between colloidal particles, namely van der Waals attraction, repulsion between polymer coating layers, and a hard-core particle repulsion. In addition, a screened form of the electrostatic interaction was included. It is argued that optimal conditions for dispersion stability can be derived from a comparative analysis of the PMF under the different situations studied. This thermodynamics-based analysis is believed to be more accessible to specialists working on the development of improved colloidal formulations than that based on the more abstract, radial distribution functions. DOI : 10.1007/s11998-014-9600-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9600-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22358 [article]

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