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Controlled wetting/dewetting through substrate vibration-assisted spray coating (SVASC) / M. Habibi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 211-225 Titre : Controlled wetting/dewetting through substrate vibration-assisted spray coating (SVASC) Type de document : texte imprimé Auteurs : M. Habibi, Auteur ; Morteza Eslamian, Auteur ; F. Soltani-Kordshuli, Auteur ; Fatemeh Zabihi, Auteur Année de publication : 2016 Article en page(s) : p. 211-225 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Démouillage (chimie des surfaces) Dépôt par pulvérisation Mouillage (chimie des surfaces) Pérovskite Photopiles Poly(3,4-éthylènedioxythiophène) Polystyrène sulfone Ultrasons Vibrations (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : We have recently developed a novel spray-coating method, called the “substrate vibration-assisted spray coating” (SVASC) (Zabihi and Eslamian in J Coat Technol Res 12:711–719, 2015), in which ultrasonic vibration is imposed on the substrate to improve the spray-on film and coating characteristics. In that work, the SVASC method was introduced, and its effectiveness on the uniformity and electrical conductivity of PEDOT:PSS films, used in emerging solar cells, was demonstrated. The present work reports unprecedented results on the effect of the ultrasonic vibration power on wetting/dewetting of PEDOT:PSS films. It is observed that, while the application of a low-power ultrasonic vibration (LPUV) improves the surface wetting and film coverage through improving droplet spreading and coalescence and repairing of the dewetted areas, a high-power ultrasonic vibration (HPUV) promotes dewetting, resulting in less coverage and the formation of a nonuniform film. The improved wetting due to the application of the LPUV has opened a window of opportunity for the fabrication of intact thin films and related thin film devices. On the other hand, the controlled dewetting process due to the application of the HPUV may have novel applications in template fabrication and self-assembly in nanotechnology. Here, we also study the effects of the application of multipass spraying compared with single-pass spraying strategy, and the application of using two co-solvents on PEDOT:PSS film characteristics. The results confirm that the utilization of isopropyl alcohol (IPA) as a co-solvent added to the PEDOT:PSS precursor solution improves the surface wettability and film coverage, compared to the films made using demethylformamide (DMF), as the co-solvent. DOI : 10.1007/s11998-015-9748-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9748-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26107 [article]

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Effect of binder on performance of intumescent coatings / Joana T. Pimenta in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 227-238 Titre : Effect of binder on performance of intumescent coatings Type de document : texte imprimé Auteurs : Joana T. Pimenta, Auteur ; Carlos Gonçalves, Auteur ; Loic Hiliou, Auteur ; Jorge F. J. Coelho, Auteur ; Fernào D. Magalhàes, Auteur Année de publication : 2016 Article en page(s) : p. 227-238 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère styrène acrylique Intumescence (chimie) Isolation thermique Liants Microscopie Polyacryliques polymères vinyliques Pyrolyse La pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation. Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente. Revêtements -- Additifs:Peinture -- Additifs Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : This study investigates the role of the polymeric binder on the properties and performance of an intumescent coating. Waterborne resins of different types (vinylic, acrylic, and styrene-acrylic) were incorporated in an intumescent paint formulation, and characterized extensively in terms of thermal degradation behavior, intumescence thickness, and thermal insulation. Thermal microscopy images of charred foam development provided further information on the particular performance of each type of coating upon heating. The best foam expansion and heat protection results were obtained with the vinyl binders. Rheological measurements showed a complex evolution of the viscoelastic characteristics of the materials with temperature. As an example, the vinyl binders unexpectedly hardened significantly after thermal degradation. The values of storage moduli obtained at the onset of foam blowing (melamine decomposition) were used to explain different intumescence expansion behaviors. Note de contenu : - EXPERIMENTAL : Materials and intumescent coatings preparation - Characterization methods - RESULTS : Thermal degradation - Intumescence morphology and thermal insulation - Thermal microscopy - Rheology DOI : 10.1007/s11998-015-9737-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9737-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26108 [article]

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Quantification and prediction of visually perceived specular gloss at three illumination/viewing geometries / Fereshteh Mirjalili in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 239-256 Titre : Quantification and prediction of visually perceived specular gloss at three illumination/viewing geometries Type de document : texte imprimé Auteurs : Fereshteh Mirjalili, Auteur ; Siamak Moradian, Auteur ; Farhad Ameri, Auteur ; Mohammad Amani Tehran, Auteur Année de publication : 2016 Article en page(s) : p. 239-256 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique) Eclairage Evaluation visuelle Mesure vision des couleurs Tags : 'Brillant  spéculaire'  'Evaluation  visuelle'  'Niveau  de  brillance  achromatique'  'Eclairage  unidirectionnel'  'Brillance  mètre  trois  angles' Index. décimale : 667.9 Revêtements et enduits Résumé : In the present study, attempts were made to clarify the existence of a correlation between visually perceived and instrumentally measured specular gloss of a series of achromatic samples. To this end, seven achromatic physical scales of specular gloss each consisting of 10 or 11 samples were prepared using lithographically printed black, white, and five in between gray papers. The samples were visually assessed and subsequently quantified in terms of a visually uniform color constant lightness scale, by a panel of 14 observers in an especially designed unidirectional light compartment at three illumination/observation geometries, namely 20°/20°, 60°/60°, and 85°/85°. Four statistical parameters were utilized to determine the correlation between visually perceived and instrumentally measured specular gloss. The results show that the instrumental 60°/60° geometry is capable of efficiently quantifying the equivalent specular gloss as perceived by a human observer. Surprisingly, it was also possible to accurately predict the visually quantified specular gloss both at the 20° and the 85° geometries by the aid of applying special linear relationships derived from the instrumentally measured specular gloss of the 60° geometry. Note de contenu : - EXPERIMENTAL : Preparation of specular gloss scales - Instrumental characterization - Visual assessments - RESULTS AND DISCUSSION : Correlation between visual results and instrumental measurements DOI : 10.1007/s11998-015-9756-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9756-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26109 [article]

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Functionalization of cotton fabric with nanosized TiO2 coating for self-cleaning and antibacterial property enhancement / Gulumser Doganli in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 257-265 Titre : Functionalization of cotton fabric with nanosized TiO2 coating for self-cleaning and antibacterial property enhancement Type de document : texte imprimé Auteurs : Gulumser Doganli, Auteur ; Burak Yuzer, Auteur ; Iberia Aydin, Auteur ; Tugce Gultekin, Auteur ; Ahmet Hilmi Con, Auteur ; Huseyin Selcuk, Auteur ; Sema Palamutcu, Auteur Année de publication : 2016 Article en page(s) : p. 257-265 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Dioxyde de titane Essais de résilience Nanoparticules Surfaces fonctionnelles Textiles et tissus Textiles et tissus auto-nettoyants Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, titanium dioxide (TiO2) was used as coating compound to add self-cleaning and antibacterial functionality properties to the cotton fabric. TiO2-consisting coating compounds were prepared at four different processing temperatures (20, 40, 60, and 80°C) in order to examine the influence of process temperature on average particle size. Among the prepared solutions, the one prepared at 80°C process temperature was selected for the dip coating application of the 100% cotton fabric, which formed a transparent nanosized TiO2 film on the fibrous structure of fabric. Dip coating trials were done at five coating temperatures of 20, 40, 60, 80, and 100°C. TiO2-coated and uncoated fabric samples were then tested to evaluate their self-cleaning and antibacterial activities. A self-cleaning activity test was conducted using uncoated and TiO2-coated fabric samples which were stained with hot tea solution via dipping method. Stained fabric samples were illuminated under a solar simulator for the color changes to measure photocatalytic degradation of stain colors. Antibacterial performance of TiO2-coated and uncoated fabric samples was determined against pure cultures of Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 29213. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Preparation of coating solution - Pretreatment and coating of cotton fabric - Characterization of TiO2 nanoparticles - Antimicrobial activity test - Assessment of tea stain degradation for self-cleaning activity - RESULTS AND DISCUSSION : Effect of temperature on particle size distribution - Effect of coating temperature on the deposition of TiO2 on the textile surface - Effect of temperature and coating time on the self-cleaning performance of the modified cotton textile - Antimicrobial activities on the TiO2-coated textile surface DOI : 10.1007/s11998-015-9743-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9743-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26110 [article]

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Characterization of a hybrid nano-silica waterborne polyurethane coating for clay bricks / Simonetta Lucia Pagliolico in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 267-276 Titre : Characterization of a hybrid nano-silica waterborne polyurethane coating for clay bricks Type de document : texte imprimé Auteurs : Simonetta Lucia Pagliolico, Auteur ; Elena Daniela Ozzello, Auteur ; Guido Sassi, Auteur ; Roberta Bongiovanni, Auteur Année de publication : 2016 Article en page(s) : p. 267-276 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile Briques Nanoparticules Photoréticulation Polyacryliques Polyuréthanes Revêtements en phase aqueuse -- Séchage:Peinture en phase aqueuse -- Séchage Revêtements protecteurs Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 667.9 Revêtements et enduits Résumé : A transparent hybrid organic–inorganic waterborne coating was evaluated for the protection of clay bricks. The nanocomposite film was prepared by combining an environmentally friendly process based on UV-curing of water-based acrylic resins and a mild thermal treatment to form nanosilica in situ from alkoxysilane precursors. Coated and uncoated facing bricks were compared by scanning electron microscopy, surface profilometry, water wettability, and capillary rise tests. The hybrid coatings act as a moderate water repellent; interestingly, no appreciable alteration of the aesthetic properties of the brick was observed, in particular no gloss or color change appeared after the treatment. Note de contenu : - EXPERIMENTAL : Specimen preparation - Analyses and characterization - RESULTS AND DISCUSSION : Characterization of the brick substrate - Characterization of OIH resin - Characterization of treated brick samples compared to the untreated DOI : 10.1007/s11998-015-9758-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9758-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26111 [article]

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The effect of precipitated calcium carbonate nanoparticles in coatings / W. S. Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 277-286 Titre : The effect of precipitated calcium carbonate nanoparticles in coatings Type de document : texte imprimé Auteurs : W. S. Wu, Auteur ; M. E. Queiroz, Auteur ; N. D. S. Mohallem, Auteur Année de publication : 2016 Article en page(s) : p. 277-286 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole. C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots. Mouillabilité Nanoparticules Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements en bâtiment:Peinture en bâtiment Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : The insertion of nanoparticles into some industrial materials can give them special properties due to their high reactivity. These nanoparticles interact with other particles, changing and/or improving the final product properties. The aim of this work is to study the effects of nanoparticles of precipitated calcium carbonate (NPCC) with sizes between 40 and 60 nm on the characteristics of architectural paints when used as nanofillers together with micrometric fillers. For this study, two types of emulsion paints were prepared, one without and the other with NPCC. The emulsion paint prepared with NPCC showed better wet-state storage stability of the coating, greater abrasion resistance, lower roughness, and lower wettability than the conventional paint. DOI : 10.1007/s11998-015-9740-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9740-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26112 [article]

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Assessment of hydrophobic and anticorrosion properties of composite silane–zeolite coatings on aluminum substrate / Luigi Calabrese in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 287-297 Titre : Assessment of hydrophobic and anticorrosion properties of composite silane–zeolite coatings on aluminum substrate Type de document : texte imprimé Auteurs : Luigi Calabrese, Auteur ; Lucio Bonaccorsi, Auteur ; Angela Caprì, Auteur ; Edoardo Proverbio, Auteur Année de publication : 2016 Article en page(s) : p. 287-297 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite. L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement. L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium. Anticorrosion Electrochimie Essais (technologie) Hydrophobie Métaux -- Revêtements protecteurs Métaux -- Surfaces Morphologie (matériaux) Mouillabilité Silanes Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : The effect of matrix compounds on the behavior of silane–zeolite composite coatings on a 6061 aluminum alloy was evaluated by electrochemical test performed at long immersion time in 3.5% NaCl solution. It was observed that silane chains influence the hydrophobic behavior and the electrochemical performances of the zeolite-based composite coating. All composite coatings showed a long-term protection action in 3.5% NaCl solution. The use of silane compounds with long alkyl chain or with bi-hydroxyl groups made it possible to obtain electrochemically stable coating during long immersion time. Best results have been obtained with a multicomponent silane mixture (short and long molecular chains). Note de contenu : - RESULTS AND DISCUSSION : Morphology - Wettability tests - Electrochemical tests - STRUCTURAL MODEL OF SILANE-ZEOLITE COATING DOI : 10.1007/s11998-015-9760-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9760-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26113 [article]

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Capillary condensation-induced anomalous water sorption in urethane-based coatings exposed to high humidity conditions / A. Allahdini in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 299-306 Titre : Capillary condensation-induced anomalous water sorption in urethane-based coatings exposed to high humidity conditions Type de document : texte imprimé Auteurs : A. Allahdini, Auteur ; H. Yazdani Ahmadabadi, Auteur ; S. Rastegar, Auteur ; Z. Ranjibar, Auteur Année de publication : 2016 Article en page(s) : p. 299-306 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Capillarité Condensation Humidité Humidité -- Absorption:Eau -- Absorption Polyuréthanes Revêtements:Peinture Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, the water uptake of crosslinked urethane-based coatings in high humidity conditions as a function of crosslinking temperature was investigated. The water uptake values were measured using an electrochemical impedance spectroscopy technique by applying the Brasher–Kingsbury procedure. Water uptake values as high as 200% were observed in the current research. These anomalous results were explained based on capillary condensation of diffused water molecules in the nano-metrically (or nano-scale) rough hydrophilic surfaces of the pores formed by thermal degradation of the polyurethane network. The water uptake value is at its minimum when an effectively pore-free tight network formed at moderate crosslinking conditions. DOI : 10.1007/s11998-015-9746-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9746-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26114 [article]

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Application of nanostructured titanium dioxide pigments in paper coating: a comparison between prepared and commercially available ones / Fatma A. Morsy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 307-316 Titre : Application of nanostructured titanium dioxide pigments in paper coating: a comparison between prepared and commercially available ones Type de document : texte imprimé Auteurs : Fatma A. Morsy, Auteur ; Samya El-Sherbiny, Auteur ; Marwa Samir, Auteur ; Osama A. Fouad, Auteur Année de publication : 2016 Article en page(s) : p. 307-316 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anatase L’anatase est une espèce minérale formée de dioxyde de titane de formule TiO2 avec des traces de fer, d'antimoine, de vanadium et de niobium. Dioxyde de titane Nanoparticules Papier -- Propriétés mécaniques Papier et carton couché Pigments -- Propriétés optiques Pigments inorganiques Rutile Le rutile est une espèce minérale composée de dioxyde de titane de formule TiO2 avec des traces de fer (près de 10 % parfois), tantale, niobium, chrome, vanadium et étain. Il est trimorphe avec la brookite et l'anatase. Il est la forme la plus stable de dioxyde de titane et est produit à haute température, la brookite se formant à des températures plus basses et l'anatase formée à des températures encore plus basses. Index. décimale : 667.9 Revêtements et enduits Résumé : Nano-TiO2 pigments in pure crystallographic anatase and rutile phases have been successfully prepared by hydrothermal at 120°C and hydrolysis methods, respectively. The laboratory-prepared pigments were characterized parallel to two commercial pigments of the same crystal structure. All pigments were applied in paper coating mixtures, and their influence on coated paper properties was systematically investigated. X-ray diffraction investigation showed that the laboratory-prepared pigments using the hydrothermal method at 120°C were pure anatase, whereas hydrolysis method produced pure rutile phase pigment. The application of the prepared nanopigments and the corresponding commercial TiO2 phases in paper coating revealed that clay/rutile nano-TiO2 pigments in paper coating mixture decreased coated paper roughness more than blending clay with anatase nano-TiO2 pigments. Commercial nano-TiO2 pigments increased porosity of coated paper at both the 30% and 50% addition of nano-TiO2 pigments to clay, while laboratory-prepared nano-TiO2 pigments highly decreased it at 30% addition of nano-TiO2 to clay, compared to clay only. Blending of clay/nano-TiO2 pigments improved both brightness and opacity of the coated paper where commercial pigments are more effective. Burst, tensile strength, stretching, and TEA were improved in the case of all pigments. The 50% addition of the prepared and commercial nanopigments in conjunction with clay improved the mechanical coated paper properties more than 30% addition (except the cases of stretching and TEA of the commercial pigments). The coated paper samples were offset printed. It was found that blending of clay/nano-TiO2 pigments improved print density. Commercial nano-TiO2 pigments improved print gloss more than the laboratory-prepared ones. This result was found consistent with the results of coated paper roughness. Note de contenu : - EXPERIMENTAL : Materials - Preparation of titanium dioxide nanopigments - Application of nano-TiO2 pigments in paper coating - Preparation of coating mixtures and coated paper samples - Printing of coated paper samples - characterization of the nano-TiO2 and coated paper samples - RESULTS AND DISCUSSION : Characterization of the prepared and commercial titanium dioxide pigments - Application in paper coating DOI : 10.1007/s11998-015-9735-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9735-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26115 [article]

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Synthesis of trimethylolpropane esters of tall oil fatty acids and properties of polyurethane coatings on their basis / Vladimir Yakushin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 317-324 Titre : Synthesis of trimethylolpropane esters of tall oil fatty acids and properties of polyurethane coatings on their basis Type de document : texte imprimé Auteurs : Vladimir Yakushin, Auteur ; Maria Misane, Auteur ; Oskars Bikovens, Auteur ; Dzintra Vilsone, Auteur ; Irina Sevastyanova, Auteur Année de publication : 2016 Article en page(s) : p. 317-324 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides gras Esters Polyols Polyuréthanes Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements:Peinture Triméthylolpropane Index. décimale : 667.9 Revêtements et enduits Résumé : Tall oil fatty acids (TOFA) were esterified with trimethylolpropane (TMP) without a catalyst at different molar ratios of TMP to TOFA. A molar ratio was defined, at which a polyol stable in long-term storage, with the maximum content of TMP monoesters, was synthesized. Fourier transform infrared spectroscopy and gas chromatography were used for the identification of the polyols’ chemical structure and composition. Based on the synthesized polyols, polyurethane coatings were prepared. The effect of the isocyanate index and concentration of traditional Sn-based and less toxic Bi-based catalysts on the gel time of the polyurethane composition, and the mechanical and thermal properties of the coatings was studied. It was found that the new coatings had high tensile strength and modulus of elasticity, comparable with the strength and modulus of the polyurethane based on diethanolamides of TOFA. The initial temperature of decomposition of these coatings was higher than that of the polyurethanes based on esters of TOFA and a number of uralkyds. The coatings based on TMP esters of TOFA were obtained without the use of solvents, and potentially, these esters can be used in spray-applied VOC-free polyurethane coatings’ formulation. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of polyols - Polyol analysis - Preparation and characterization of polyurethane coatings - RESULTS AND DISCUSSION : Properties of polyols - Properties of polyurethanes DOI : 10.1007/s11998-015-9747-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9747-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26116 [article]

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Influence of adding multiwalled carbon nanotubes on the adhesive strength of composite epoxy/sol-gel materials / Heming Wang ; Robert Akid in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 325-332 Titre : Influence of adding multiwalled carbon nanotubes on the adhesive strength of composite epoxy/sol-gel materials Type de document : texte imprimé Auteurs : Heming Wang, Auteur ; Robert Akid, Auteur Année de publication : 2016 Article en page(s) : p. 325-332 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Epoxydes Essais dynamiques Nanotubes de carbone à parois multiples Un nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets : - le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ; - le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier. Résistance au cisaillement Revêtements -- Propriétés mécaniques Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : The tensile shear strength of a composite epoxy/sol–gel system modified with different ratios of multiwall carbon nanotubes (MWCNTs) was evaluated using a mechanical testing machine. The experimental results showed that the shear strength increased when lower than ~0.07 wt% of MWCNTs were added in the composite solution. The increase of the shear strength was attributed to both the mechanical load transfer from the matrix to the MWCNTs and the high specific surface area of this material that increased the degree of crosslinking with other inorganic fillers in the formulation. However, a decrease in the adhesive shear strength was observed after more than ~0.07 wt% MWCNTs were added to the composite. The reason for this may be related to the high concentration of MWCNTs within the matrix leading to excessively high viscosity, dewetting of the substrate surfaces, and reduced bonding of MWCNTs with the matrix, thereby limiting the strength. SEM observation of the fracture surfaces for composite epoxy/sol–gel adhesive materials with 0.01 wt% MWCNTs showed a mixed interfacial/cohesive fracture mode. This fracture mode indicated strong links at the adhesive/substrate interface, and interaction between CNTs and the matrix was achieved; therefore, adhesion performance of the composite epoxy/sol–gel material to the substrate was improved. An increase of a strong peak related to the C–O bond at ~1733 cm−1 in the FTIR spectra was observed. This peak represented crosslinking between the CNT surface and the organosilica nanoparticles in the MWCNTs-doped composite adhesive. Raman spectroscopy was also used to identify MWCNTs within the adhesive material. The Raman spectra exhibit peaks at ~1275 cm−1 and in the range of ~1549–1590 cm−1. The former is the graphite G-band, while the latter is the diamond D-band. The D-band and G-band represent the C–C single bond and C=C double bond in carbon nanotubes, respectively. Note de contenu : - EXPERIMENTAL WORK : Materials - Composite epoxy/sol-gel solution preparation - Dispersion of MWCNTsinto the epoxy/sol-gel material - Mechanical and surface characterization - RESULTS AND DISCUSSION : Adhesive shear strength - SEM observation - FTIR spectra of the composite/epoxy sol-gel adhesive - Raman spectra analysis DOI : 10.1007/s11998-015-9761-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9761-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26117 [article]

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Investigation on release of highly water soluble drug from matrix-coated pellets prepared by extrusion–spheronization technique / Muhammad Iqbal Nasiri in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 333-344 Titre : Investigation on release of highly water soluble drug from matrix-coated pellets prepared by extrusion–spheronization technique Type de document : texte imprimé Auteurs : Muhammad Iqbal Nasiri, Auteur ; Rabia Ismail Yousuf, Auteur ; Muhammad Harris Shoaib, Auteur ; Muhammad Fayyaz, Auteur ; Faaiza Qazi, Auteur ; Kamran Ahmed, Auteur Année de publication : 2016 Article en page(s) : p. 333-344 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. Diffusion (physique) Enrobage pharmaceutique Ethylcellulose Extrusion sphéronisation Hydroxypropyl méthylcellulose Médicaments Polymères cristallins Polymères en médecine Index. décimale : 667.9 Revêtements et enduits Résumé : The objective was to formulate itopride HCl (ITP) extended release matrix-coated pellets by extrusion–spheronization and to investigate the influence of concentration and viscosity grade of different polymers on release of a highly water soluble drug. The matrix pellet formulations consisted of polymers (10–30%) like hydroxypropyl methylcellulose (HPMC K4M, K15M, and K100M), ethyl cellulose (EC-7 cps), microcrystalline cellulose (10–30%) and a fixed quantity of lactose (10%). The initial fast drug release from the matrix pellets was effectively controlled by coating with 5% ethyl cellulose (10 cps) dispersion. The dissolution studies of coated formulations were carried out at different pH, and data were analyzed for drug release kinetics. Scanning electron microscope was used to examine the surface morphology and cross section of pellets. Kinetics of all coated formulations were best explained by Higuchi model (R 2 = 0.94–0.99). However, HPMC matrix-coated pellets (F1, F4 and F7) also followed Baker and Lonsdale model (R 2 = 0.96–0.99), whereas, EC matrix-coated pellets (F10) followed zero-order kinetics (R 2 = 0.99). Release mechanism of all coated formulations was non-fickian. Both uncoated and coated pellets were found to be spherical. Fourier transform infrared spectroscopy was conducted on the coated formulations and no drug–excipients interaction was found. Note de contenu : - Physical and chemical evaluation of uncoated ITP matrix pellet formulation - Image analysis - Scanning electron microscopy (SEM) - Fourier transform infrared spectroscopy (FTIR) - In vitro drug release studies - Drug release kinetics - Drug release mechanism - Stability studies DOI : 10.1007/s11998-015-9749-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9749-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26118 [article]

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Surface improvement on water and oil affinities and absorption rate of PVA/Tung oil-coated paperboard and fiberboard in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 345-354 Titre : Surface improvement on water and oil affinities and absorption rate of PVA/Tung oil-coated paperboard and fiberboard Type de document : texte imprimé Année de publication : 2016 Article en page(s) : p. 345-354 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcool polyvinylique Analyse mécanique dynamique Cartonnages Catalyseurs Fourier, Spectroscopie infrarouge à transformée de Huile de tung L'huile de tung ou "huile de bois de Chin" ou encore "huile d'abrasin" est une huile de couleur jaune d'or, tirée des graines mûres d'un arbre de la famille des Aleurites (Aleurites moluccana - le noyer de bancoule - ou de Vernicia fordii selon les sources). Elle est employée notamment comme huile siccative en peinture ou comme traitement de surface du bois. (Wikipedia) Matériaux -- Propriétés thermomécaniques Oxydoréduction Panneaux de fibres Réticulation (polymérisation) Revêtements Thermique Index. décimale : 667.9 Revêtements et enduits Résumé : A novel coating material on paperboard and fiberboard from poly(vinyl alcohol) (PVA) modified with Tung oil was developed. The PVA/Tung oil coating was cured at several conditions: 25, 40, 50, and 60°C, in the presence of two types of catalysts, i.e., thermal catalyst using potassium persulfate (KPS) and redox catalyst using KPS and sodium thiosulfate. The chemical crosslinked structure of PVA/Tung oil-coating films was confirmed by FTIR. The result indicated the decrease in the double bonds of Tung oil by crosslinking reaction, especially at 60°C. In comparison with the same curing temperature, the films with redox catalyst showed more reduction in the number of double bonds of Tung oil. DMA results of the PVA/Tung oil-coating materials with redox catalyst showed the lowering of the heights of both β transition peak of Tung oil and α transition peak of PVA. FTIR and DMA results confirmed the more efficient crosslinking reaction of redox catalytic system than that of the thermal catalytic system. The water resistance and mechanical properties of these coating materials exhibited better values as projected to higher curing temperature and redox catalyst. SEM images showed the smooth surface of PVA/Tung oil covered on the paperboards with ~72 µm in thickness. The contact angle of water or oil drop and dynamic change in contact angle on the surfaces of PVA/Tung oil-coated paperboards and fiberboards were investigated. The results show the contact angles for both water and oil were lower than those of the uncoated ones, indicating the improvement of water and oil affinities of the PVA/Tung oil-coating materials. The dynamic changes in contact angle of the coated ones also decreased, suggesting the reduction in water and oil absorption rates of these coated substrates. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PVA/tung oil sheet - Characterization of PVA/tung oil - Water resistance of PVA/tung oil - Mechanical thermal property of PVA/tung oil - Mechanical properties of PVA/tung oil - Preparation of coated paperboard or fiberboard - Characterization of paperboard and fiberboard - Sample identification - RESULTS AND DISCUSSION : FTIR characterization - Water resistance of PVA/tung oil - Mechanical thermal property of PVA/tung oil - Mechanical properties of PVA/tung oil - Morphology of PVA/tung oil oil-coated boards - Contac angle measurement DOI : 10.1007/s11998-015-9750-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9750-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26119 [article]

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Hybrid sol-gel coatings for corrosion protection of galvanized steel in simulated concrete pore solution / Riba B. Figueira in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 355-373 Titre : Hybrid sol-gel coatings for corrosion protection of galvanized steel in simulated concrete pore solution Type de document : texte imprimé Auteurs : Riba B. Figueira, Auteur ; Carlos J. R. Silva, Auteur ; Elsa V. Pereira, Auteur Année de publication : 2016 Article en page(s) : p. 355-373 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Anticorrosion Corrosion Electrochimie Matériaux hybrides Métaux -- Revêtements protecteurs Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : The aim of this experimental research was to study the electrochemical behavior of organic–inorganic hybrid (OIH) coatings for corrosion protection of hot-dip galvanized steel (HDGS) in the first instants of immersion in simulated concrete pore solution (SCPS) (pH > 12.5). The electrochemical performance of the OIH coatings was assessed by electrochemical impedance spectroscopy, potentiodynamic polarization curves, macrocell current density, and polarization resistance. The OIH coatings were prepared via the sol–gel method and were deposited on HDGS surfaces by dip-coating using one or three dip steps. The electrochemical results obtained for HDGS samples coated with OIH matrices in SCPS showed higher corrosion resistance than bare HDGS; as the molecular weight (MW) of Jeffamine® increased the barrier protection of the coating decreased. The lowest protection efficiency was found for HDGS samples synthesized with oligopolymers with an MW of 2000. Coatings produced with an oligopolymer of 230 MW conferred the highest protection. The surface morphology of the OIH coatings deposited on HDGS surfaces was studied by atomic force microscopy. The results show that the roughness of the OIH films depends on the MW of Jeffamine® and on the number of dip-coating steps used. Thermogravimetry results show that the Jeffamine® MW affected the thermal properties of the prepared OIH samples. The prepared OIH materials are thermally stable within the range of 20–80°C. Note de contenu : - EXPERIMENTAL : Reagents - Synthesis procedure of OIL ureasilicate matrix monoliths films and coatings by sol-gel method - Coating deposition - Electrochemical measurements - Coating morphology analysis - Thermogravimetric measurements (TGA) - RESULTS AND DISCUSSION : Electrochemical impedance spectroscopy (EIS) - Potentiodynamic polarization studies - Macrocell current density (igal) and polarization resistance measurements - Surface characterization by AFM - Thermogravimetric analysis (TGA) DOI : 10.1007/s11998-015-9751-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9751-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26120 [article]

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Investigation on electrostatic assist and gravure process parameters on solid mottle reduction for shrink films / Akshay V. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 375-383 Titre : Investigation on electrostatic assist and gravure process parameters on solid mottle reduction for shrink films Type de document : texte imprimé Auteurs : Akshay V. Joshi, Auteur ; Christoph Dettke, Auteur ; Joseph Steingraeber, Auteur Année de publication : 2016 Article en page(s) : p. 375-383 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chlorure de polyvinyle Electrostatique Films rétractables Héliogravure Impression sur matières plastiques Marbrures (défauts) Polyéthylène téréphtalate Index. décimale : 667.9 Revêtements et enduits Résumé : Gravure is a high throughput printing process, normally associated with speed, quality, and long print runs. It is widely used for printing on shrink films and other substrates. The shrink films, in particular, polyvinyl chloride (PVC) and glycol-modified polyethylene terephthalate (PET-G), are two dominant substrates widely consumed and printed by gravure process. The PVC and PET-G offer different properties which greatly influence the printability. The surface energy of the substrate determines the adhesion and wettability of ink, while electrical properties such as surface and volume resistivity impact electrostatic assist (ESA) performance. The introduction of ESA in gravure further improved the print quality by eliminating dot skips with reduced impression pressure. However, print defects such as print mottle is inevitable. Print mottle occurs due to a discrepancy between substrate, ink, and process parameters which degrade the print quality. These complexities need to be addressed to deliver higher productivity with less print waste. Therefore, the study investigates the effect of process parameters, i.e., substrate type, line screen, air gap (distance between charge bar and impression roller), viscosity, voltage, and speed, and aims to quantify their effect numerically on defect minimization. The Design of Experiments (DOE) was generated for the above-mentioned parameters and analyzed to extract the best combination of process parameters. The optimized setting showed a reduction in solid mottle by 54% and 57% for PET-G and PVC, respectively. Note de contenu : - MATERIAL AND METHOD : Substrate - Ink - Layout design - Experimental process - Sampling and measurement technique - Experimental design - RESULTS AND DISCUSSION : Production run and baseline - Print mottle DOI : 10.1007/s11998-015-9753-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9753-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26121 [article]

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A wear simulation study of nanostructured CVD diamond-on-diamond articulation involving concave/convex mating surfaces / Paul A. Baker in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 385-393 Titre : A wear simulation study of nanostructured CVD diamond-on-diamond articulation involving concave/convex mating surfaces Type de document : texte imprimé Auteurs : Paul A. Baker, Auteur ; Raymond G. Thompson, Auteur ; Shane A. Catledge, Auteur Année de publication : 2016 Article en page(s) : p. 385-393 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt chimique en phase vapeur Métaux -- Revêtements protecteurs Revêtement en diamant Simulation, Méthode de Usure (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : Using microwave plasma chemical vapor deposition, a 3-µm-thick nanostructured diamond layer was deposited onto polished, convex, and concave components that were machined from Ti–6Al–4V alloy. These components had the same radius of curvature, 25.4 mm. Wear testing of the surfaces was performed by rotating articulation of the diamond-deposited surfaces (diamond-on-diamond) with a load of 225 N for a total of 5 million cycles in bovine serum resulting in polishing of the diamond surface and formation of very shallow, linear wear grooves of less than 50 nm depth. The two diamond surfaces remained adhered to the components and polished each other to an average surface roughness that was reduced by as much as a factor of 80 for the most polished region located at the center of the condyle. Imaging of the surfaces showed that the initial wearing-in phase of the articulating surfaces by the end of the 5 million cycles. Atomic force microscopy, scanning electron microscopy, Raman spectroscopy, and surface profilometry were used to characterize the surfaces and verify that the diamond remained intact and uniform over the surface, thereby protecting the underlying metal. These wear simulation results show that diamond deposition on Ti alloy has potential application for joint replacement devices with improved longevity over existing devices made of cobalt chrome and ultra-high molecular weight polyethylene. DOI : 10.1007/s11998-015-9738-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9738-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26122 [article]

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Preparation of metal chelating active packaging materials by laminated photografting / Zhuangsheng Lin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 395-404 Titre : Preparation of metal chelating active packaging materials by laminated photografting Type de document : texte imprimé Auteurs : Zhuangsheng Lin, Auteur ; Eric A. Decker, Auteur ; Julie M. Goddard, Auteur Année de publication : 2016 Article en page(s) : p. 395-404 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide polyacrylique Chélates Copolymères greffés Emballages en matières plastiques Fer Matériaux -- Propriétés barrières polyacide hydroxamique Polypropylène Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Active packaging materials with surface immobilized metal chelating ligands were prepared by laminated photografting technique. The resulting materials presented transition metal scavenging properties with potential application in non-migratory antioxidant active packaging materials. Photografting of functional polymer ligands is typically performed in an oxygen-free environment, requiring a nitrogen inerting step, which limits potential industrial scale-up. Laminated photografting eliminates the need for nitrogen inerting by sandwiching the monomer solution between base material and an oxygen barrier layer. In this study, we demonstrated the ability to synthesize metal chelating active packaging materials, previously prepared by standard batch photografting, using a laminated photografting technique. The polypropylene-graft-poly(acrylic acid) and polypropylene-graft-poly(hydroxamic acid) chelating films prepared by laminated photografting presented similar surface chemistry as those reported previously, as characterized by infrared spectroscopy, and presented ferric ion chelating capacity of 182 ± 29 and 89 ± 10 nmol/cm2, respectively, at pH 5.0. The reported laminated photografting represents a coating technology with potential for adaptation to roll-to-roll manufacture of metal chelating films on an industrial scale. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Surface modification - Surface characterization - Iron chelating capacity - Statistics - RESULTS AND DISCUSSION : Surface characterization - Iron chelating capacity DOI : 10.1007/s11998-015-9767-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9767-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26123 [article]

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