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JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH . Vol. 4, N° 1Mention de date : 03/2007Paru le : 15/03/2007 |
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Ajouter le résultat dans votre panierThe development of coatings using combinatorial/high throughput methods : a review of the current status / Bret J. Chisholm in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : The development of coatings using combinatorial/high throughput methods : a review of the current status Type de document : texte imprimé Auteurs : Bret J. Chisholm, Auteur ; Dean C. Webster, Auteur Année de publication : 2007 Article en page(s) : p. 1-12 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie combinatoire
Criblage haut-débit
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Combinatorial chemistry is a relatively new experimental methodology developed by academics and researchers in the pharmaceutical industry to reduce the time and cost associated with drug development. Basically, combinatorial chemistry involves the rapid synthesis and evaluation of large numbers of compounds in parallel using robotics, rapid analytical instrumentation, and data management software. More recently, the principles of combinatorial chemistry have been applied to materials development, and interest in this area is increasing rapidly. This interest can be attributed to the potential for obtaining a major competitive advantage by implementing a combinatorial approach. This document provides an introduction to combinatorial materials science and provides a review of efforts aimed at developing combinatorial workflows for coating development. While the application of combinatorial methods to coating development is still in its infancy, full combinatorial workflows have been developed within a few different organizations. DOI : 10.1007/s11998-007-9000-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9000-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3665
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Numerical simulation of flows in beadless disperser by finite difference lattice Boltzmann method / X. F. Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Numerical simulation of flows in beadless disperser by finite difference lattice Boltzmann method Type de document : texte imprimé Auteurs : X. F. Zhang, Auteur ; M. Enomura, Auteur ; M. Tsutahara, Auteur ; K. Takebayashi, Auteur ; M. Abe, Auteur Année de publication : 2007 Article en page(s) : p. 13-19 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Disperseurs
Dispersions et suspensions
Emulsions
Gouttelettes
Nanoparticules
Rhéologie
Simulation par ordinateurTags : Finite difference lattice Boltzmann method Dispersion Emulsion Beadless disperser Disintegration Droplet Ultra-thin film high-shear Nanoparticle Index. décimale : 667.9 Revêtements et enduits Résumé : A new beadless disperser, an ultra-thin film high-shear disperser (UFHD), was developed, and the flow in its dispersion part (a flow between rotating and stationary rings) was simulated using the finite difference lattice Boltzmann method (FDLBM). The efficiency of the FDLBM for this kind of flow field was verified. The FDLBM possesses some distinctive features such as relatively easy implementation of boundary conditions in complicated geometries, high efficiency in parallel processing, and flexible reproduction of the interface between multiple phases, that make the method very suitable for simulating complex flows in the disperser, in which the fluid consists of a mixture of solvent and particles, and the deformation, breakup and coalescence of suspended particles occur. It was shown that the performance of the disperser can easily be simulated and elucidated by the FDLBM. DOI : 10.1007/s11998-007-9005-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9005-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3666
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Scaling behavior in the scratching of automotive clearcoats / Christopher M. Seubert in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Scaling behavior in the scratching of automotive clearcoats Type de document : texte imprimé Auteurs : Christopher M. Seubert, Auteur ; Mark E. Nichols, Auteur Année de publication : 2007 Article en page(s) : p. 21-30 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Automobiles -- Vernis
Formulation (Génie chimique)
Mesure
Résistance à l'abrasion
Revêtements protecteurs
Vernis -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The scratch resistance of four clearcoat formulations was evaluated using a CSM nano-scratch tester, an AMTEC-Kistler simulated carwash tester, and a laboratory scale macro-scratching tester. Significant differences in the rank-order of all the clearcoats were found when comparing the scratch and mar behavior using macro-scratching, nano-scratching, and AMTEC-Kistler testing. Field vehicles were also examined where the mean and median widths of scratches found on vehicles were 237 and 141 µm, respectively. The range of loads associated with events with the potential to create real-world scratches was found to be significantly higher (5-35 N) than the forces needed to make scratches of the same mean size as those seen in the field (7-10 N). These results indicated that a significant improvement in the scratch resistance of these clearcoats would be needed before customers would notice improvements in their paint finish's scratch resistance. DOI : 10.1007/s11998-007-9006-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9006-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3667
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Waterborne latex coatings of color. III. Triblock polyether influences on color development and viscosity / David M. Mahli in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Waterborne latex coatings of color. III. Triblock polyether influences on color development and viscosity Type de document : texte imprimé Auteurs : David M. Mahli, Auteur ; Daniel G. Phillips, Auteur ; J. Edward Glass, Auteur ; Jon M. Wegner, Auteur Année de publication : 2007 Article en page(s) : p. 31-41 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colorants
Epaississants
Formulation (Génie chimique)
Latex
Noir de carbone
Polyéthylène glycol
Polyoxypropylène
Revêtements en phase aqueuse:Peinture en phase aqueuse
Rhéologie
Surfactants
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Oxyethylene (PEO)/oxypropylene (PPO) triblock polymers are added to colorant formulations to determine the influence of molecular weight and other structural variances on the rheology and color development of tinted latex paints. Waterborne coatings are a matrix of many coating components. In this study, a 108- or a 600-nm latex was thickened with a nonassociative thickener, hydroxyethyl cellulose, or an associative telechelic HEUR thickener. Triblock polymers with internal PPO segments and PEO terminal segments added as a dispersant to colorant packages, lead to better color development than PPO/PEO/PPO triblocks dispersants in carbon black (CB) tinted paints. The increase in color development with high molecular weight (MW) triblocks starts at a very low concentration (2 mM) and plateaus in a Langmuir-type adsorption isotherm. Lower molecular weight triblock polymers also exhibit this behavior in CB-, red-, and yellow-tinted latex coatings; however, increasing the terminal PEO segment sizes leads to better color development only in the CB-tinted coatings. With large PEO terminal units red and yellow tints are high only at very low concentrations (2 mM) of the triblock. This parabolic response in color development, in contrast to CB-tinted formulations, is attributed to the high surface area and porosity of CB that limits the amount of large PEO segments interacting with the talc particle present at twice the volume fraction of the colorant. With the lower surface areas of the red and yellow colorants, the interaction of the large PEO terminal segments with talc particles accounts for the limited triblock concentration for which good color development is observed. This can be reversed by decreasing or eliminating talc from the formulation. DOI : 10.1007/s11998-007-9007-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9007-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3668
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Photoinitiation of multifunctional acrylates via ferrocene-alkyl chloride charge transfer complexes / Julie A. Anderson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Photoinitiation of multifunctional acrylates via ferrocene-alkyl chloride charge transfer complexes Type de document : texte imprimé Auteurs : Julie A. Anderson, Auteur ; Evan Hardgrove, Auteur ; T. Brian Cavitt, Auteur ; Perry C. Reeves, Auteur Année de publication : 2007 Article en page(s) : p. 43-49 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cinétique chimique
Molécules -- Modèles
Photoamorceurs (chimie)
Photochimie
Photoréticulation
Polyacrylates
Rayonnement électronique
Rayonnement ultraviolet
Simulation, Méthode de
Spectroscopie ultravioletteIndex. décimale : 667.9 Revêtements et enduits Résumé : The propensity for ferrocene-alkyl chloride charge transfer complexes (CTCs) to photoinitiate free-radical polymerization of multifunctional acrylates was determined using photodifferential scanning calorimetry. Also, the effects of varying ferrocene (ferrocene, methoxyferrocene, and cyanoferrocene) and alkyl chloride (dichloromethane and benzyl chloride) derivatives were evaluated with regard to the overall polymerization rate and conversion. Furthermore, relative polymerization rates of traditional free-radical Type I and Type II photoinitiators were compared to those of the ferrocene-alkyl chloride CTCs. Semi-empirical quantum mechanical analysis of the complexation reaction was performed using PM3, indicating a thermodynamic preference of complexations involving benzyl chloride, and corroborated the reported complexation mechanism. In order to explain the varying polymerization rates, the association constants for each complex were determined, whereupon complexation of each ferrocene derivative with dichloromethane was found to be more facile than similar complexation with benzyl chloride due to steric considerations. Substituent effects were more pronounced for the benzyl chloride complexes relative to those involving dichloromethane where steric constraints caused deviation from the expected effect. Thus, the cyanoferrocene-benzyl chloride CTC was determined to be the most effective photoinitiator examined with regard to semi-empirical analysis, complexation kinetics, and polymerization rate. DOI : 10.1007/s11998-007-9008-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9008-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3669
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible A functional fluoropolymer powder coating for chemical process applications / W. P. Kosar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : A functional fluoropolymer powder coating for chemical process applications Type de document : texte imprimé Auteurs : W. P. Kosar, Auteur ; S. Morris, Auteur Année de publication : 2007 Article en page(s) : p. 51-58 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Hexafluoropropylène
Polyfluorure de vinylidène
Résistance chimique
Revêtements poudre:Peinture poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : Copolymers of vinylidene fluoride and hexafluoropropylene are well known for their chemical resistance and high purity. Extruded piping, molded parts, and sheet linings find extensive use in chemical process applications. A new powder coating has been developed which is based on this copolymer resin to augment existing products and applications. This powder coating is easy to apply, particularly for odd-shaped parts, and can be applied at high thicknesses (>2.5 mm). This powder coating can be a cost-effective alternative to stainless steel and glass linings. A description of the coating process and selected applications are presented. Chemical exposure data are also presented, comparing this functional fluoropolymer powder coating with uncoated stainless steel. DOI : 10.1007/s11998-007-9009-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9009-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3670
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Polyurethaneurea aqueous dispersions prepared with diethyltoluenediamine as chain extender / Lin Jiang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Polyurethaneurea aqueous dispersions prepared with diethyltoluenediamine as chain extender Type de document : texte imprimé Auteurs : Lin Jiang, Auteur ; Yong Lin Chen, Auteur ; Chun Pu Hu, Auteur Année de publication : 2007 Article en page(s) : p. 59-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère uréthane-urée
Couches minces -- Propriétés mécaniques
Diéthyl toluène diamine
Dispersions et suspensions
Résistance à l'humidité:Résistance à l'eauIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of polyurethaneurea (PUU) aqueous dispersions either with diethyltoluenediamine (DETDA) or ethylenediamine (EDA) as chain extender were prepared with polyester polyol, isophorone diisocyanate and dimethylol propionic acid (DMPA), and characterized. It was found that the physical properties of the PUU aqueous dispersions prepared with DETDA were similar to or better than those prepared with EDA. Compared with the EDA-extended waterborne PUU films, the water resistance and the mechanical properties of the DETDA-extended waterborne PUU films were enhanced appreciably; these enhancements are attributed to the strong hydrogen bonding in urea carbonyl groups and the ordered structure of hard segments in the systems. The DETDA-extended PUU film with 40 wt.% of hard segment and 4.0 wt.% of DMPA unit showed the lowest water-absorbing amount (2.6 wt.%) over all PUU films studied. The hydrophobic surface of the DETDA-extended PUU film modified with a small amount of aminoethylaminopropyl polydimethylsiloxane (AEAPS) was observed and its hydrophobicity was enhanced by increasing the AEAPS content further. DOI : 10.1007/s11998-007-9010-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9010-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3671
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Influence of cycloaliphatic compounds on the properties of polyurethane coatings / Shailja Awasthi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Influence of cycloaliphatic compounds on the properties of polyurethane coatings Type de document : texte imprimé Auteurs : Shailja Awasthi, Auteur ; Devendra Agarwal, Auteur Année de publication : 2007 Article en page(s) : p. 67-73 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composés aliphatiques
Polyesters
Polyols
Polyuréthanes
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of polyester polyol resin was synthesized by using 1,4-cyclohexanedimethanol (1,4-CHDM) and three different diacids: 1,3-cyclohexanedicarboxylic acid (1,3-CHDA), isophthalic acid (IPA) and adipic acid (AA). The solubility and viscosity of the polyester polyols were determined by using methyl ethyl ketone (MEK). All the polyester polyols were crosslinked with hexamethylene diisocyanate (HDI) isocyanurate to form polyurethane coating films. These films were evaluated for their mechanical and chemical resistance properties. Studies on the film characteristics revealed that the polyurethane films based on cycloaliphatic diacid generally showed comparatively better performance properties than the polyurethane film based on aromatic and linear aliphatic diacids in general. DOI : 10.1007/s11998-007-9011-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9011-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3672
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Solventborne paint systems on carbon steel and hot-dip galvanized steel for a wide range of atmospheric exposures / F. Fragata in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Solventborne paint systems on carbon steel and hot-dip galvanized steel for a wide range of atmospheric exposures Type de document : texte imprimé Auteurs : F. Fragata, Auteur ; D. de La Fuente, Auteur ; E. Almeida, Auteur ; D. Santos, Auteur ; M. Morcillo, Auteur Année de publication : 2007 Article en page(s) : p. 75-87 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone
Anticorrosifs
Anticorrosion
Essais accélérés (technologie)
Matériaux -- Propriétés barrières
Métaux -- Revêtements:Métaux -- Peinture
Pigments
Polymères
Revêtement en phase solvant:Peinture en phase solvantIndex. décimale : 667.6 Peintures Résumé : The paper analyzes the performance of solventborne paint systems applied on carbon steel and hot-dip galvanized steel in a wide range of atmospheric exposures. The study has involved paint systems exposure for 3.5 years in eight natural atmospheres. The atmospheric conditions cover from temperate rural climates to tropical severe marine and Antarctic coastal regions. The paint systems included several alkyds formulated with a variety of pigments (anticorrosive and barrier), epoxies, chlorinated rubber, and zinc-rich (ethyl silicate and epoxy). It has been concluded that in rural and urban atmospheres alkyd systems afford equivalent anticorrosive protection of steel to the epoxy/polyurethane system. The toxic red lead pigment may be replaced in long linseed-oil alkyd primer paints by non-toxic pigments, such as a mixture of micaceous iron oxides (MIO) and black iron oxides or zinc phosphate, without affecting the anticorrosive properties of the paint system. In aggressive atmospheres (industrial, marine), paint systems including zinc-rich primers or applied on galvanized steel must be used, especially in surface regions with coating faults (scribes). DOI : 10.1007/s11998-007-9003-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9003-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3673
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Studies on corrosion resistant properties of inhibitive primed IPN coating systems in comparison with epoxy-PU systems / S. M. Krishnan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Studies on corrosion resistant properties of inhibitive primed IPN coating systems in comparison with epoxy-PU systems Type de document : texte imprimé Auteurs : S. M. Krishnan, Auteur ; P. S. Mohan, Auteur Année de publication : 2007 Article en page(s) : p. 89-100 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Epoxydes
Essais accélérés (technologie)
Isocyanates
Polyuréthanes
Réseaux polymères
Réticulation (polymérisation)
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Though blending polymers to obtain high performance materials is an old practice, the new trend in such an approach is the emergence of interpenetrating polymer networks (IPNs) as binders for protective coatings with improved properties. In this study, one ambient curing IPN-type polymer alloy developed out of epoxy and acrylic polyurethane systems as a high performing binder was formulated into paints and evaluated in comparison with the currently used conventional epoxy polyamide and polyurethane systems. A three-coat system consisting of a zinc phosphate primer, a micaceous iron oxide (MIO) undercoat, and a topcoat was formulated out of the IPN along with a similar system of epoxy primer, epoxy undercoat, and a PU topcoat. A two-coat system of the same primer with an IPN clear topcoat and a similar system with epoxy has also been studied. All the systems were studied under accelerated laboratory tests and field tests at a corrosive location. The results are reported and conclusions are drawn in this article. DOI : 10.1007/s11998-007-9004-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9004-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3674
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of silver nanocomposite textile / Hongbo Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Preparation and characterization of silver nanocomposite textile Type de document : texte imprimé Auteurs : Hongbo Wang, Auteur ; Jinyan Wang, Auteur ; Jianhan Hong, Auteur ; Qufu Wei, Auteur ; Weidong Gao, Auteur ; Zhifeng Zhu, Auteur Année de publication : 2007 Article en page(s) : p. 101-106 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Argent
Caractérisation
Composites à fibres
Conducteurs organiques
Conduction électrique
Fibres textiles synthétiques
Fibres textiles synthétiques -- Propriétés électriques
Métallisation
Morphologie (matériaux)
Nanostructures
Nontissés
PolyoléfinesUne polyoléfine, parfois appelée polyalcène, désigne un polymère aliphatique saturé, synthétique, issu de la polymérisation d'une oléfine (aussi appelée un alcène) telle l'éthylène et ses dérivés.
La formule générale est -(CH2-CRR')n-, où R et R' peuvent être l'atome d'hydrogène (H) ou les radicaux alkyle apolaires CH3, CH2-CH3, CH2-CH(CH3)2. Il existe aussi des mousses isolantes souples faites à partir de polyoléfine (pour l'isolation thermique de tuyaux plastiques par exemple).
PRESENTATION : Les polyoléfines forment la plus importante famille de matières plastiques, avec quatre représentants (PP, HDPE, LDPE, LLDPE) parmi les plastiques de grande consommation. La consommation mondiale de ces quatre polymères est évaluée à plus de 60 millions de tonnes en 20001.
Seul un petit nombre de polyoléfines a atteint le niveau industriel :
les polyoléfines thermoplastiques semi-cristallines : polyéthylène (PE), polypropylène (PP), polyméthylpentène (PMP), polybutène-1 (PB-1) ;
les polyoléfines élastomères : polyisobutylène (PIB), éthylène-propylène (EPR ou EPM) et éthylène-propylène-diène monomère (EPDM).
PROPRIETES : En raison de leur nature paraffinique, les polyoléfines sont hydrophobes et possèdent en général une grande inertie chimique (aux solvants, acides, bases, etc.). Ces matériaux ont donc une qualité alimentaire. Le collage est très difficile (la surface est particulièrement inerte, des traitements de surface spéciaux sont nécessaires).
Cependant, ils sont sensibles à l'action des UV, et résistent très peu à l'inflammation car leur indice limite d'oxygène est faible (exemple : ILO ~ 17 pour le polyéthylène).
Leur densité est très faible [0,83 (cas du PMP) < d < 0,95] : ils flottent dans l'eau.
Ils sont opaques, sauf le PMP (transparent).
Polypropylène
Projection au plasmaIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanostructured silver films of different thicknesses were deposited on surfaces of polypropylene nonwovens by magnetron sputter coating to obtain antibacterial and electrical conductive properties. The surface morphology of nanostructured silver films was investigated by atomic force microscopy (AFM). The antibacterial properties of the nonwovens coated with relatively thinner films were evaluated using the shake flask test. The conductivity of the nonwovens coated with relatively thicker films was examined using an ohm-meter. The results of the antibacterial test revealed that the antibacterial performance improved gradually as the film thickness increased from 0.5 to 3 nm. It is believed that the total amount of silver ions released from the coating was increased along with the increase in film thickness. As sputtering time prolonged, the grain sizes of the silver particles were increased and the coating became more compact. The results of the electrical conductivity test showed that the increased film thickness led to the improved electrical conductivity when the film was relatively thicker. The AFM images clearly revealed the change in surface morphology formed by sputter coating. The growth and coverage of the coating layer contributed to the improvement in its antibacterial and conductive properties. DOI : 10.1007/s11998-007-9001-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9001-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3675
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 1 (03/2007) . - p. 101-106[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Shear-induced 1-D alignment of alumina nanoparticles in coatings / Lucas J. Brickweg in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Shear-induced 1-D alignment of alumina nanoparticles in coatings Type de document : texte imprimé Auteurs : Lucas J. Brickweg, Auteur ; Bryce R. Floryancic, Auteur ; Erik D. Sapper, Auteur ; Raymond H. Fernando, Auteur Année de publication : 2007 Article en page(s) : p. 107-110 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine
Matériaux hybrides
Nanoparticules
Nanotechnologie
Polyuréthanes
SiliceLa 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.
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : Atomic Force Microscopy and Scanning Electron Microscopy were used to study shear-induced alignment of alumina and silica nanoparticles in two-component polyurethane clear coatings. 1-D strings of nanoparticles, formed in an extended pearl-necklace fashion were observed near the surfaces of cured films at nanoparticle volume fractions less than 0.05. This alignment is affected by the shear conditions of the application method. When applied by spraying, linear particle strings as long as 5 cm were observed in the direction of shear. Nanoparticle strings were also found, to a lesser extent, when coatings were applied by a drawdown method. The phenomenon was not observed in coatings applied with minimal shear. These particle string formations, in addition to affecting the performance of coatings, may have broader implications in the field of nanomaterials. Our literature searches so far have not uncovered reports of stable, 1-D nanoparticle arrangements with same degree of linearity produced under simple shear with compositions having very low particle loadings. DOI : 10.1007/s11998-007-9002-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9002-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3676
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 1 (03/2007) . - p. 107-110[article]Réservation
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Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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007149 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
008267 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |