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JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH . Vol. 17, N° 1Mention de date : 01/2020Paru le : 21/02/2020 |
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Ajouter le résultat dans votre panierOptimizing the benefits of TiO2 in paints / Michael P. Diebold in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Optimizing the benefits of TiO2 in paints Type de document : texte imprimé Auteurs : Michael P. Diebold, Auteur Année de publication : 2020 Article en page(s) : p. 1-17 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Blanc (couleur)
Dioxyde de titane
Durée de vie (Ingénierie)
Farinage (défauts)
Lumière -- Absorption
Lumière -- Diffusion
Opacité (optique)
Pigments inorganiques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : TiO2 is found virtually in every coatings lab and manufacturing site around the world and is used in almost all paints. The primary role of TiO2 is to provide brightness and opacity, with a secondary role in many exterior paints of improving durability. The effectiveness of TiO2 as a brightener or opacifier is greatly affected by the specifics of the paint formulation and by the paint making process. This sensitivity can be understood in terms of the physics that govern light scattering. As for improving paint durability, TiO2 is an excellent UV light absorber and protects underlying resin from harmful UV radiation. However, this benefit can be offset by the formation of radicals at the TiO2/resin interface. This paper will focus on the formulation factors that affect the light scattering efficiency and the durability performance of TiO2 and techniques to optimize these properties. Note de contenu : - INTRODUCTION : Light scatternig : Mie scattering - Light scattering : dependent scattering - Light scattering vs light absorption - Scattering vs PVC - Quantifying pigment dispersion - Proposed methods foroptimizing opacity - Air/TiO2 composite particles - Low scattering efficiency pigment - Random nanoparticle spacers - Targeted nanoparticle spacers - Air voids - Light absorption of TiO2 pigments - Consequences of degradation-chalking - "Ultimate" TiO2 durability - Consequences of degradation-gloss loss - Two-component approach DOI : 10.1007/s11998-019-00295-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00295-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33725
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible A review on application of carbon nanostructures as nanofiller in corrosion-resistant organic coatings / Sepideh Pourhashem in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : A review on application of carbon nanostructures as nanofiller in corrosion-resistant organic coatings Type de document : texte imprimé Auteurs : Sepideh Pourhashem, Auteur ; Ebrahim Ghasemy, Auteur ; Alimorad Rashidi, Auteur ; Mohammad Reza Vaezi, Auteur Année de publication : 2020 Article en page(s) : p. 19-55 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Charges (matériaux)
Epoxydes
Fullerènes
GraphèneLe graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur.
Nanostructures
Nanotubes de carbone à parois multiplesUn 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.
Noir de carbone
Oxyde de graphène
Revêtements organiques
Revêtements protecteurs
Toxicologie cellulaireIndex. décimale : 667.9 Revêtements et enduits Résumé : Since corrosion has tremendous economic effects, academics and industries have sought to develop more effective coatings. These efforts have led to profound importance of nanocomposite coatings based on polymers and carbon nanostructures. It is shown that good reinforcement, advanced mechanical properties, and high corrosion resistance are only found at relatively low levels of nanocarbon (i.e., fullerene, carbon black, carbon nanotubes, graphene, graphene oxide, and carbon dots) loadings in coating compositions. Herein, a survey of breakthrough scientific studies on application of carbon nanostructures in corrosion-resistant organic coatings is carried out to pave the way for future developments in novel nanocoatings. Note de contenu : - Fullerene
- Carbone black
- Carbone nanotubes
- Graphene
- Graphene oxide : Functionalizing GO sheets - Decorating nanoparticles on GO sheets
- Carbon dots
- Application of multicarbon nanostructures
- Corrosion protection mechanism
- Cytotoxicity of carbon nanostructuresDOI : 10.1007/s11998-019-00275-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00275-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33726
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Effects of surface modification of cellulose nanocrystals (CNCs) on curing behavior, optical, and thermal properties of soybean oil bio-nanocomposite / Nicolas Auclair in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Effects of surface modification of cellulose nanocrystals (CNCs) on curing behavior, optical, and thermal properties of soybean oil bio-nanocomposite Type de document : texte imprimé Auteurs : Nicolas Auclair, Auteur ; Alireza Kaboorani, Auteur ; Bernard Riedl, Auteur ; Véronic Landry, Auteur Année de publication : 2020 Article en page(s) : p. 57-67 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
Epoxydation
Huile de soja
Matériaux hybrides
Nanoparticules
Réticulation (polymérisation)
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements organiques
Rugosité
Stabilité thermique
Transition vitreuse
Transparence (optique)Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, UV cured bio-nanocomposite coating systems were developed. An acrylated epoxidized soybean oil (AESO) and cellulose nanocrystals (CNCs) were used to make these coating systems. The CNC surface was modified by two different methods so as to achieve good compatibility between the CNC and AESO. Thermal stability, glass transition temperature, optical clarity (transparency), and curing behavior of the coating systems were assessed. The addition of CNC altered the thermal stability of the bio-nanocomposites slightly. Addition of CNC increased glass transition temperature of AESO. This increase was a function of the CNC surface modification method and CNC loading level. The transparency of the bio-nanocomposites was reduced by the addition of CNC. The curing behavior of these coating systems was not significantly different from that of a pure cured AESO matrix. A study of the morphology of the nanocomposite films by AFM demonstrated that the modified CNC had good compatibility with the AESO matrix. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Methods
- RESULTS AND DISCUSSION : Curing behavior - Thermal stability - Glass transition temperature (Tg) - Transparency - Surface roughnessDOI : 10.1007/s11998-019-00237-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00237-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33727
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Wet clay adhesion to antistick coatings : effects of binder type and surface roughness / Andrea Fasano in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Wet clay adhesion to antistick coatings : effects of binder type and surface roughness Type de document : texte imprimé Auteurs : Andrea Fasano, Auteur ; Liliana Madaleno, Auteur ; Svava Davidsdottir, Auteur ; Lars S. Jensen, Auteur ; Josep Palasi, Auteur ; Claus Erik Weinell, Auteur ; Kim Dam-Johansen, Auteur ; Søren Kiil, Auteur Année de publication : 2020 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Angle de contact
Argile
Caractérisation
Chimie analytique
Frottements (mécanique)
Humidité
Liants
Matériaux cimentaires
Mesure
Métaux -- Revêtements
Revêtements anti-adhésion
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : The handling of sticky raw material can cause problems during operation of process equipment in the cement production industry. These handling problems are generally observed when raw material (e.g., wet clay) sticks to machine walls and causes blockage of outlets. This leads to frequent production shutdowns and expensive cleaning operations. In this work, the effects of surface material and process parameters on the friction forces between wet clay and surface were investigated. Various surface materials and clay impact speeds were investigated. The results demonstrate that not only the equipment surface material but also the surface roughness influences the observed frictional behavior. The ranking of the materials in terms of effective static friction coefficients fell in two groups with equal performance within the group: (1) Two Teflon-based coatings (Accofal 2G54 and Accolan LB), polished AISI 304 stainless steel, Matrox lining, and a polyurethane-based coating (best performing surfaces), (2) Mild steel, a silicone-based coating, and AISI 304 stainless steel (worst performing surfaces). However, the friction coefficients of the two groups only varied by a factor of two, suggesting that adhesion of wet clay to surfaces is difficult to avoid by the use of coatings. Note de contenu : - INTRODUCTION : Mechanisms of wet clay adhesion to surfaces
- PILOT PLANT DESIGN AND MEASUREMENT SYSTEM : Pilot plant design - Calculation of the effective static friction coefficient
- STEEL DISKS, LINING, AND COATINGS : Contact angle measurements
- CHARACTERIZATION OF THE CLAY USED : X-ray analysis of the clay - Particle size analysis of the clay - Chemical analysis of clay - Mineral composition of clay - Rheological analysis of clay - Water content of clay
- RESULTS AND DISCUSSION : Effect of clay lump mass - Effect of repositioning of clay lump - Effect of surface material - The combined effect of surface material and roughness - Contact angle measurementsDOI : 10.1007/s11998-019-00240-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00240-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33728
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Theoretical evaluation of the impact of finite intervals in the measurement of the bidirectional reflectance distribution function / Alejandro Ferrero in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Theoretical evaluation of the impact of finite intervals in the measurement of the bidirectional reflectance distribution function Type de document : texte imprimé Auteurs : Alejandro Ferrero, Auteur Année de publication : 2020 Article en page(s) : p. 81-90 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Lumière -- Diffusion
Mesure
Réflectivité bidirectionnelleIndex. décimale : 667.9 Revêtements et enduits Résumé : The bidirectional reflectance distribution function (BRDF) is a well-defined quantity that allows the bidirectional reflectance of surfaces to be described. However, the light propagation in a specific direction cannot be perfectly realized in practice, because the physical apertures are not infinitesimal but finite. Consequently, a BRDF measurement cannot be considered fully bidirectional, although the measure coincides with the BRDF within a certain confidence level. To properly understand the impact of the finite apertures on the BRDF measures, the deviation between the real BRDF and the BRDF to be obtained using real experimental conditions with finite apertures was theoretically studied for surfaces with realistic BRDFs. The biconical reflectance factor was used to estimate these “measured BRDFs” in different geometrical conditions, and a family of negative exponential functions was defined to assess the impact on surfaces with different angular scattering distributions. An expression for estimating the relative error from finite apertures is given, which considers the angular variation of the BRDF and the different solid angles involved in the measurement. Note de contenu : - Estimation of the measured BRDF
- Evaluation of the measured BRDF for different conditions
- General rule to estimate errorDOI : 10.1007/s11998-019-00241-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00241-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33729
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Epoxy functionalization of multiwalled carbon nanotubes for their waterborne polyurethane composite with crosslinked structure / Shaohui Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Epoxy functionalization of multiwalled carbon nanotubes for their waterborne polyurethane composite with crosslinked structure Type de document : texte imprimé Auteurs : Shaohui Wang, Auteur ; Huafeng Duan, Auteur ; Guozhang Ma, Auteur ; Caiying Hou, Auteur ; Jianbin Wu, Auteur ; Shasha Li, Auteur ; Ziyuan Yang, Auteur ; Xiaogang Hao, Auteur Année de publication : 2020 Article en page(s) : p. 91-100 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Caractérisation
Composites -- Propriétés mécaniques
Conduction électrique
Epoxydes
Nanotubes de carbone à parois multiplesUn 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.
Polymères en émulsion
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Réticulation (polymérisation)
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In order to achieve covalent bond between multiwalled carbon nanotubes (MWCNTs) and waterborne polyurethane (WPU), pristine MWCNTs were first oxidized by strong acids and then underwent ring-opening reaction with epoxy resin to chemically attach epoxy moiety onto their surface. For fabrication of the MWCNTs/WPU composite, the epoxy moiety facilitates the dispersion of MWCNTs in the polymer matrix and could react with carboxylic acid or amine groups in the WPU macromolecules to form a crosslinked structure in their composite, resulting in a great improvement in their mechanical property, thermal stability, water resistance, and electrical conductivity. As the content of MWCNTs reached 1.5 wt%, the tensile strength of functionalized MWCNTs composite was improved by about 108% and the electrical conductivity was increased by six orders of magnitude compared to that of the pristine MWCNTs composite. Note de contenu : - EXPERIMENTAL : Materials - Preparation of epoxy-functionalized MWCNTs - Synthesis of WPU and fabrication of MWCNTs/WPU composites - Characterization
- RESULTS AND DISCUSSION : Characterization of the functionalized MWCNTs - Mechanical properties of MWCNTs/WPU composites - Dynamic mechanical properties of MWCNTs/WPU composites - Dispersion and interfacial adhesion of MWCNTs in/with WPU matrix - Water resistance of MWCNTs/WPU composites - Thermalstability of MWCNTs/WPU composites - Electrical conductivity properties of MWCNTs/WPU compositesDOI : 10.1007/s11998-019-00242-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00242-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33730
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Highly dispersed graphene oxide–zinc oxide nanohybrids in epoxy coating with improved water barrier properties and corrosion resistance / Nurul Husna Othman in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Highly dispersed graphene oxide–zinc oxide nanohybrids in epoxy coating with improved water barrier properties and corrosion resistance Type de document : texte imprimé Auteurs : Nurul Husna Othman, Auteur ; Wan Zaireen Nisa Yahya, Auteur ; Mokhtar Che Ismail, Auteur ; Mustapha Zi, Auteur ; Zi Kang Koi, Auteur Année de publication : 2020 Article en page(s) : p. 101-114 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Anticorrosifs
Anticorrosion
Epoxydes
Nanoparticules
Oxyde de graphène
Oxyde de zinc
Revêtements organiques
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy resin (EP) coating that prevents corrosion is subject to premature failure as its crosslinking network appears to be porous due to the presence of hollow spaces across the network, which leads to poor water barrier. This study introduces a novel approach of utilizing the stable surface property of zinc oxide (ZnO) to facilitate the dispersion of graphene oxide (GO) sheets in epoxy coating to improve water barrier and corrosion resistance properties. The ZnO nanoparticles (ZnO NPs) were decorated on GO sheets by using (3-aminopropyl)triethoxysilane as coupling agent. The GO-ZnO nanohybrids were successfully formed, as demonstrated in Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses. The GO-ZnO sheets were well dispersed in epoxy matrix with no significant agglomeration, as verified via field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy. The decoration of GO with ZnO NPs expanded the spacing between GO sheets, as observed from the outcomes of X-ray diffraction analysis, which improved exfoliation and compatibility in epoxy matrix. Based on the investigations and characterization outputs, the well-dispersed GO-ZnO nanohybrids in the epoxy coatings had effectively improved water barrier properties, as well as adhesion and corrosion protection, in comparison with neat epoxy (EP) and GO–epoxy coatings.AAT Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of graphene oxide-zinc oxide (Go-ZnO) nanocomposite - Preparation of epoxy nanocomposite coating - Corrosion tests - Pull-off adhesion
- RESULTS AND DISCUSSION : Characterization of functionalized zinc oxide (APTES-ZnO) and GO-ZnO - Dispersion behavior of GO and GO-ZnO nanohybrids in solvent - Characterization of GO/EP and Go-ZnO/EP nanocomposites - Corrosion protection performance of EP? GO/EP, and GO-ZnO/EP coatingsDOI : 10.1007/s11998-019-00245-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00245-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33731
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Effects of added nanoclay for styrene-acrylic resin on intumescent fire retardancy and CO/CO2 emission / Chih-Shen Chuang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Effects of added nanoclay for styrene-acrylic resin on intumescent fire retardancy and CO/CO2 emission Type de document : texte imprimé Auteurs : Chih-Shen Chuang, Auteur ; Horn-Jiunn Sheen, Auteur Année de publication : 2020 Article en page(s) : p. 115-125 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile
Combustion
Contreplaqué
Copolymère styrène acrylique
Dioxyde de carbone
Emission de polluants
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Intumescence (chimie)
Monoxyde de carboneLe monoxyde de carbone est le plus simple des oxydes du carbone. La molécule est composée d'un atome de carbone et d'un atome d'oxygène ; sa formule brute s'écrit CO et sa formule semi-développée C≡O ou |C≡O|. Ce corps composé est à l'état gazeux dans les conditions normales de température et de pression.
Le monoxyde de carbone est un gaz incolore, inodore, insipide et non irritant, indétectable par les mammifères bien que particulièrement toxique. Le mélange avec l'air est facile puisque les deux gaz ont une densité proche. Chez l'Homme, il est la cause de nombreuses intoxications domestiques, souvent mortelles, qui peuvent être évitées par l'utilisation d'un détecteur de monoxyde de carbone. Son émanation, provenant d'une combustion incomplète de composés carbonés, est accentuée par une mauvaise alimentation en air frais et/ou une mauvaise évacuation des produits de combustion (ventilation).
Nanoparticules
Polymères en émulsion
Revêtements protecteurs
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Coating plywood with intumescent paint is an effective approach to ensure fire safety in materials. This study investigated the effects of applying an intumescent coating with nanoclay and different amounts of Cloisite 15A (1%, 3%, 5%, and 10%) on 4-mm plywood panels. The nanoclay coating had a lower total heat release and peak heat release rate than other approaches, and it significantly enhanced the fire retardancy of painted plywood. In addition, nanoclay treated with an organic modifier has better flame retardancy than unmodified nanoclay. Another critical parameter in this study was the concentration of organoclay added to the intumescent coating. Cloisite 15A at a concentration of 1% further enhanced the fire retardancy of plywood. A higher organoclay concentration can reduce CO emissions ; however, it also increases CO2 emissions during combustion. The intumescent char layers containing 1% and 3% organoclay had the most extensive phosphocarbonaceous structures according to Fourier-transform IR spectroscopy and 27Al and 31P nuclear magnetic resonance analyses. Regarding the mechanism of fire performance and CO/CO2 emissions, the addition of 1% and 3% Cloisite 15A to intumescent coatings is recommended; it achieved superior performance to Cloisite 15A at a higher concentration (i.e., 10%). Note de contenu : - EXPERIMENTAL : Materials - Sample preparations - Flammability tests - Thermogravimetric analysis - Fourier-transform IR (FTIR) analysis - Spectroscopy analysis of 27Al and 31P solid-state nuclear magnetic resonance
- RESULTS AND DISCUSSION : Cone calorimeter test results for clay and organoclay - Thermal property of intumescent coating with different amounts of organoclay - CO and CO2 emission of intumescent coatings with different concentrations of organoclay - FTIR analysis of different coatings - Solid-state 27Al and 31P NMR analyses of different coatingsDOI : 10.1007/s11998-019-00246-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00246-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33732
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Optimized synthesis of highly reactive UV-curable hyperbranched polyester acrylates / Sacha Pérocheau Arnaud in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Optimized synthesis of highly reactive UV-curable hyperbranched polyester acrylates Type de document : texte imprimé Auteurs : Sacha Pérocheau Arnaud, Auteur ; Payam Hashemi, Auteur ; Petra Mischnick, Auteur ; Tobias Robert, Auteur Année de publication : 2020 Article en page(s) : p. 127-143 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Esterification
Mesure
Photoréticulation
Polyacrylates
Polyesters
Polymères -- Propriétés mécaniques
Polymères -- Synthèse
Polymères ramifiés
Polyols
Rayonnement ultraviolet
Relations structure-propriétésIndex. décimale : 667.9 Revêtements et enduits Résumé : Highly reactive radical polyester acrylates are widely used as UV-curing binder resins for printing inks, coatings, and materials for additive manufacturing. Especially for the latter, polyesters with low viscosities are of high interest, as they allow for UV-curing materials with reduced amounts of reactive diluents to adjust the viscosity. One possibility to obtain polyester acrylates with low viscosities is the synthesis of hyperbranched structures, as the interactions of the polymer chains are reduced in comparison to their linear counterparts. In this study, an optimized synthetic protocol is described to obtain a set of highly branched polyester acrylates with a high degree of acrylation, without the use of activated reagents like anhydrides or acid chlorides that are usually employed to synthesize these products. Different cores and number of pseudo-generations of 2,2-bis(hydroxymethyl)propionic (bisMPA) are utilized to study the structure–property relationship of this class of polyesters. Comprehensive characterization of the synthesized resins and cured materials revealed high reactivities and good mechanical properties compared to similar materials reported in the literature. The design of the structure significantly influences the properties, allowing for the synthesis of specific resins with a wide range of potential applications. Note de contenu : - Material
- Synthesis of acrylated hyperbranched polyesters first generation
- Synthesis of acrylated hyperbranched polyesters second generation
- Curing
- MeasurementDOI : 10.1007/s11998-019-00247-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00247-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33733
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Thermal characterization of solvent-free epoxy coatings by rheology and kinetics combined / Weih Q. Lee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Thermal characterization of solvent-free epoxy coatings by rheology and kinetics combined Type de document : texte imprimé Auteurs : Weih Q. Lee, Auteur Année de publication : 2020 Article en page(s) : p. 145-155 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Analyse thermique
Caractérisation
Epoxydes
Formulation (Génie chimique)
Gélification
Réticulation (polymérisation)
Revêtements organiques
Revêtements poudre:Peinture poudre
Rhéologie
Viscoélasticité
VitrificationIndex. décimale : 667.9 Revêtements et enduits Résumé : Rheology and kinetics are a pair of indispensable attributes in defining thermally reactive polymer coatings and paints. In this work, cure paths of volatile organic compound-free epoxy powder coatings, under heat, were characterized by viscoelastic and kinetic techniques. The essential rheological meanings of the gel point, the minimum complex viscosity, and the shear moduli from dynamic mechanical analysis curves were elucidated from applied formulation perspectives. Meanwhile, the maximum cure reaction rate and the peak temperature from differential scanning calorimetry exothermic profiles were quantitatively interpreted using primarily the extent of cure along with viscoelastic data. Vitrification and devitrification during cure were observed for high glass transition (Tg) epoxy formulations, unless a fast rate of heating was employed to a high enough temperature. Thorough and complete cure description provides strong insights for product development, allowing flow and cure properties to be balanced for optimal line performance. The consolidated approach is applicable to nearly all B-staged thermosetting systems of 100% solids including conditioned prepregs and a variety of adhesives per applications, as well as direct-to-metal primers or topcoats per functions. Note de contenu : - MATERIALS AND METHODS : DMA - DSC - Physicals
- RESULTS AND DISCUSSION : Generic Tg formulations - High Tg formulationsDOI : 10.1007/s11998-019-00248-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00248-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33734
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Flame retardancy and smoke suppression properties of transparent intumescent fire-retardant coatings reinforced with layered double hydroxides / Zhisheng Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Flame retardancy and smoke suppression properties of transparent intumescent fire-retardant coatings reinforced with layered double hydroxides Type de document : texte imprimé Auteurs : Zhisheng Xu, Auteur ; Nan Deng, Auteur ; Long Yan, Auteur Année de publication : 2020 Article en page(s) : p. 157-169 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anti-fumée
Caractérisation
Essais (technologie)
Hydroxydes doubles lamellaires
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Intumescence (chimie)
Mesure
Protection passive contre l'incendiela protection passive contre l’incendie dans les bâtiments est essentiellement préventive. Elle représente l’ensemble des mesures constructives permettant à un ouvrage ou une partie d’ouvrage de résister à un incendie pendant un temps prédéterminé fixé par la réglementation de construction en vigueur pour le type de bâtiment concerné. Ces mesures sont destinées à : stopper la progression des fumées, éviter la propagation des flammes, maintenir la stabilité au feu des éléments de structure le plus longtemps possible malgré l’action d’un incendie, contenir les effets thermiques le plus longtemps possible à la zone sinistrée.
La principale spécificité de la protection passive est que dès le début d’un incendie, elle fonctionne sans aucune intervention humaine ni aucun apport extérieur d’énergie.
C’est une protection durable, l’efficacité de la plupart des produits utilisés dans la protection passive n’étant pas limitée dans le temps.
Les principaux moyens de la protection passive sont : Pour les structures, le flocage, l’encoffrement, les peintures ou enduits intumescents… Pour le compartimentage, les parois, les portes coupe-feu, les calfeutrements coupe-feu de pénétration de câbles et de tuyaux, les cheminements techniques protégés...
Revêtements protecteurs
Stabilité thermique
Transparence (optique)Index. décimale : 667.9 Revêtements et enduits Résumé : A series of novel layered double hydroxide (LDH)-modified phosphate esters (LPPBs) flame retardants were synthesized by the reaction of flexible phosphate ester (PPB) and LDHs with different mass ratio and then well characterized by Fourier transform infrared spectroscopy (FTIR) and 1H nuclear magnetic resonance spectroscopy (1H NMR). The obtained LPPBs were mixed with melamine formaldehyde resin to produce transparent fire-retardant coatings applied on wood substrates. The coatings containing LDHs exhibit a high degree of transparency even at high LDH contents due to the well dispersed and completely exfoliated state of LDHs in the amino matrix, as determined from the results of X-ray diffraction (XRD) patterns and scanning electron microscopy (SEM) images. The fire protection tests show that the values of weight loss, char index, and flame spread rating of the coatings are remarkably decreased with the introduction of LDHs concomitant with an increase in the intumescent factor. The cone calorimeter and smoke density tests show that the flame retardancy and smoke suppression properties of the coatings are significantly improved with the introduction of LDHs due to the formation of a more compact, continuous, and intumescent char during combustion. The results of thermogravimetric (TG) analysis show that the thermal stability and residual weight of the coatings are gradually increased with increasing LDH content. Char residue analysis shows that the introduction of LDHs into the coatings contributes to generating more phosphorus-rich crosslinking structures and aromatic structures in the condensed phase that produce a more compact and thermally stable char against the release of heat and smoke, thus exhibiting excellent flame retardancy and smoke suppression properties. Note de contenu : - EXPERIMENTAL : Material - Synthesis of PPB and LPPBs - Preparation of transparent fire-retardant coatings - Measurements and characterization
- RESULTS AND DISCUSSION : Characterization of PPB and the LPPBs - Transparency analysis - Fire protection tests - Cone calorimeter test - Smoke density test - Thermal stability analysis - Char residue analysisDOI : 10.1007/s11998-019-00249-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00249-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33735
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Enhanced corrosion resistance and weathering resistance of waterborne epoxy coatings with polyetheramine-functionalized graphene oxide / Jing Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Enhanced corrosion resistance and weathering resistance of waterborne epoxy coatings with polyetheramine-functionalized graphene oxide Type de document : texte imprimé Auteurs : Jing Li, Auteur ; Wenwen Chan, Auteur ; Jincan Cui, Auteur ; Hanxun Qiu, Auteur ; Guangzhi Yang, Auteur ; Shiyou Zheng, Auteur ; Junhe Yang, Auteur Année de publication : 2020 Article en page(s) : p. 171-180 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Epoxydes
Greffage (chimie)
Oxyde de graphène
Polymères en émulsion
Résistance aux conditions climatiques
Revêtements -- Détérioration
Revêtements -- Effets du rayonnement ultraviolet
Revêtements en phase aqueuse
Revêtements organiques
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyetheramine (D230), an epoxy curing agent, was grafted on graphene oxide (GO) surfaces, which can be stably dispersed in a waterborne curing agent for more than 8 months. Waterborne epoxy coatings reinforced by D230-functionalized GO (DGO) were prepared on carbon steel surfaces. According to the electrochemical impedance spectra, the impedance modulus at 0.1 Hz remained at 2.2 × 109 Ω after 150 days of immersion in 3.5% NaCl electrolytes for 0.2 wt% DGO-reinforced waterborne epoxy coatings, while that of the neat epoxy coatings dropped below 1 × 107 Ω after 10 days. Besides, the addition of DGO enhanced the weathering resistance of waterborne epoxy coatings. After 60 days of the UV aging test, the yellow color index of neat epoxy coatings was 1.6 times that of 0.5 wt% DGO/epoxy coatings. The residual pencil hardness of the 0.5 wt% DGO/epoxy coatings was three levels higher than that of neat epoxy coatings. Note de contenu : - EXPERIMENTAL : Preparation of DGO - Preparation of the DGO/epoxy composite coatings - Characterizations
- RESULTS AND DISCUSSION : Functionalization of GO - Morphologies of the DGO/epoxy coatings - Corrosion protection properties of the DGO/epoxy coatings - Weathering resistance of the DGO/epoxy coatingsDOI : 10.1007/s11998-019-00252-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00252-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33736
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible A novel hydroxyl polyacrylate latex modified by OvPOSS and its application in two-component waterborne polyurethane coatings / Wu Zeng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : A novel hydroxyl polyacrylate latex modified by OvPOSS and its application in two-component waterborne polyurethane coatings Type de document : texte imprimé Auteurs : Wu Zeng, Auteur ; Haowei Huang, Auteur ; Liujun Song, Auteur ; Xiang Jiang, Auteur ; Xinya Zhang, Auteur Année de publication : 2020 Article en page(s) : p. 181-191 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Composés organiques -- Synthèse
Copolymérisation
Essai de dureté
Essai Wolff-Wilborn
Polyacrylates
Polymères à terminaison hydroxyle
Polyuréthanes
Revêtements -- Propriétés thermiques
Revêtements bi-composant
Revêtements organiques
Silsesquioxanes oligomères polyhèdresIndex. décimale : 667.9 Revêtements et enduits Résumé : Octavinyl polyhedral oligomeric silsesquioxane (OvPOSS) was synthesized via hydrolysis and condensation of vinyltriethoxysilane. The structure of OvPOSS was determined by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), 1H nuclear magnetic resonance and 29Si nuclear magnetic resonance. A novel hydroxyl functional polyacrylate latex (HPA) with core–shell structure modified by OvPOSS (OvPOSS/HPA) was successfully prepared via emulsion copolymerization. Consequently two-component waterborne polyurethane (2K-WPU) coatings were prepared by using the as-prepared latex as hydroxyl components and hydrophilic polyisocyanates as curing agents. The structure and properties of OvPOSS/HPA were marked by FTIR, XRD, differential scanning calorimetry and thermogravimetric analysis. The results of FTIR and XRD show that OvPOSS has been successfully embedded into HPA, and OvPOSS occupies a homogeneous distribution in the HPA matrix. The effect of OvPOSS on the properties of OvPOSS/HPA as well as the application performance of 2K-WPU coatings film were also investigated. The results show that OvPOSS/HPA possesses core–shell structure with the OvPOSS core and enhanced thermal stability. The glass transition temperature (Tg) of OvPOSS/HPA with 2.0% OvPOSS content is 22.3°C, which is 8.4°C higher than that of pure HPA. The performance properties of the 2K-WPU coating films such as pencil hardness were also improved by incorporation of OvPOSS. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of octavinyl-POSS (Ov POSS) - Synthesis of OvPOSS/HPA - Preparation of 2K-WPU coatings - Characterizations and instruments
- RESULTS AND DISCUSSION : Structure characterization of OvPOSS - Structure characterization of OvPOSS/HPA - Particle size distribution of OvPOSS/HPA - Thermal properties of OvPOSS/HPA filmsDOI : 10.1007/s11998-019-00256-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00256-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33737
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Rheological properties and anticorrosion performance of graphene oxide- and reduced graphene oxide-based nanocomposites / Kerim Yapici in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Rheological properties and anticorrosion performance of graphene oxide- and reduced graphene oxide-based nanocomposites Type de document : texte imprimé Auteurs : Kerim Yapici, Auteur ; Secil Peker, Auteur Année de publication : 2020 Article en page(s) : p. 193-205 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Epoxydes
Matériaux hybrides
Oxyde de graphène
Oxydoréduction
Revêtements organiques
Revêtements protecteurs
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, the effect of graphene oxide (GO) and reduced graphene oxide (rGO) nanoparticles on the corrosion protection performance of nanocomposite coatings containing particle mass concentration ranging from 0.25% to 1% in epoxy matrix was investigated in detail. In addition, the effect of the distribution of GO and rGO nanoparticles in epoxy matrix on the corrosion performance and rheology of the coatings was studied by mixing the nanocomposites with the ball milling for 24 and 48 h. The surface morphology of coatings was analyzed by field-emission scanning microscope. It was observed that oxygen groups in the graphene structure, the effective distribution of nanoparticles in the matrix and the amount of nanoparticle doped affected the corrosion protection performance. The best corrosion protection performance among all nanocomposite coatings was 0.75 wt% rGO/epoxy nanocomposite, which was milled for 48 h. GO/epoxy nanocomposite coatings exhibit hydrophilic properties in all mass fractions and mixing times. However, adding 0.5 and 0.75 wt% of rGO and milling 48 h resulted in hydrophobic nanocomposites. rGO nanoparticles had the best dispersion performance at 0.75 wt% concentration in the epoxy. The nonlinear rheological measurements revealed that rGO/epoxy nanocomposites exhibit non-Newtonian shear thinning behavior at the studied mass concentrations and milling times as opposed to the nanocomposites containing GO particles. Note de contenu : - MATERIALS AND METHODS
- SYNTHESIS OF GRAPHENE OXIDE (GO) : Synthesis of reduced graphene (rGO) - Fabrication of nanocomposite coatings
- CHARACTERIZATIONS
- RESULTS AND DISCUSSION : SEM characterization - Contact anglement measurements - Rheological behavior of graphene-based composites - Corrosion protection performance of Go/epoxy and rGO/epoxy nanocomposite coatingsDOI : 10.1007/s11998-019-00257-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00257-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33738
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Surface coverage by impact of droplets from a monodisperse spray / A. Dalili in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Surface coverage by impact of droplets from a monodisperse spray Type de document : texte imprimé Auteurs : A. Dalili, Auteur ; K. Sidawa, Auteur ; S. Chandra, Auteur Année de publication : 2020 Article en page(s) : p. 207-217 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coalescence (Sciences physiques)
Couches minces
Dépôt par pulvérisation
liquides
Revêtements:Peinture
VaporisateursIndex. décimale : 667.9 Revêtements et enduits Résumé : A novel pneumatic monodisperse spray was fabricated to validate the results of a probabilistic model and a stochastic model that were developed to predict surface area coverage of the monodisperse spray. Multiple droplets of a highly viscous 87 wt% aqueous glycerin solution were deposited on a flat, transparent, plexiglass substrate. The uniformly sized droplets (2.5 mm in diameter) impacted, spread, and coalesced on the substrate which led to the creation of a liquid sheet. Using a high-speed camera placed underneath the transparent substrate, droplet impact and resultant area coverage were recorded. When impinging droplets overlapped those already on the surface, surface tension forces pulled impacting droplets towards them, agglomerating the liquid, in a phenomenon known as drawback. The area covered by the liquid was measured from photographs using image analysis software. In the numerical models, droplets were set to impinge at random locations and drawback effects between droplets were accounted for by using a semi empirical correlation. While both models showed good agreement with the experimental results at lower area fractions, the stochastic model gave better estimates at larger area fraction due to its incorporation of drawback effects. Note de contenu : - Experimental observations
- Modeling area coverageDOI : 10.1007/s11998-019-00258-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00258-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33739
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite film / Shinsuke Katayama in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Preparation and properties of fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite film Type de document : texte imprimé Auteurs : Shinsuke Katayama, Auteur ; Masato Yasuta, Auteur ; Hideo Sawada, Auteur Année de publication : 2020 Article en page(s) : p. 219-230 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcool polyvinylique
Allongement à la rupture
Colloides
Composites
Couches minces -- Propriétés mécaniques
Oligomères
Résistance à la traction
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite [RF-(AMPS)n-RF/PVA] films were prepared by casting homogeneous aqueous methanol solutions containing RF-(AMPS)n-RF/PVA composites, which were prepared by the reactions of the corresponding oligomer with PVA. The transparent colorless RF-(AMPS)n-RF/PVA composite films thus obtained were subjected to tensile testing to evaluate the values of Young’s modulus, tensile strength, and elongation at break. The RF-(AMPS)n-RF/PVA composites films are capable of greater Young’s modulus than the original PVA film (PVA/HCl film), which was prepared by casting the aqueous methanol solution of PVA in the presence of 1 N hydrochloric acid. The polymer film bearing a higher Young’s modulus is, in general, tough and brittle to providing lower elongation at break; however, we can observe a significant increase in both the tensile strength and elongation at break of the RF-(AMPS)n-RF/PVA composite films, compared to those of the PVA/HCl film. In addition, it was demonstrated that the RF-(AMPS)n-RF/PVA composite films can exhibit a higher water adsorption ability than that of the PVA/HCl film. Note de contenu : - Measurements
- Materials
- Preparation of fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer [RF-(AMPS)n-RF]/poly(vinyl alcohol) [PVA] composites
- Preparation of fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite films
- Mechanical property of the RF-(AMPS)n-RF/PVA composite films
- Swelling ratio of the fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite filmsDOI : 10.1007/s11998-019-00259-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00259-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33740
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Isosorbide-derived boron- and phosphorus-containing precursors for flame-retardant epoxy coating / Sheth Parth in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Isosorbide-derived boron- and phosphorus-containing precursors for flame-retardant epoxy coating Type de document : texte imprimé Auteurs : Sheth Parth, Auteur ; Siddhesh Mestry, Auteur ; Dwij Dave, Auteur ; Shashank T. Mhaske, Auteur Année de publication : 2020 Article en page(s) : p. 231-241 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Borique, Acide
Caractérisation
Epoxydes
Formulation (Génie chimique)
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
IsosorbideL’isosorbide est un composé hétérocyclique obtenu à partir de la double réaction de déshydratation du sorbitol, lui-même issu de la réaction d’hydrogénation du glucose.
L’isosorbide est un diol issu des agro-ressources, non toxique, biodégradable et stable thermiquement.
L’isosorbide est un monomère qui peut être inséré dans des chaînes macromoléculaires de type polymères (polycarbonates, polyuréthanes, polyesters…). Il est également utilisé pour la synthèse de dérivés tels que les diesters, diéthers, dinitrates…
L’isosorbide est considéré comme synthon donnant accès à une nouvelle plateforme chimique d’intérêt puisqu’il est issu du végétal et permet d’obtenir de nombreux dérivés aux propriétés égales voire supérieures à leurs homologues de la pétrochimie.
Revêtements -- Analyse
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements organiques
Revêtements protecteurs
Trichlorure de phosphoryleLe trichlorure de phosphoryle, ou oxychlorure de phosphore, est un composé chimique de formule brute POCl3.
Le trichlorure de phosphoryle réagit avec l'eau et les alcools pour donner du chlorure d'hydrogène et respectivement de l'acide phosphorique et des esters de phosphate : POCl3 + 3 H2O → H3PO4 + 3 HCl.
POCl3 peut également réagir avec une base de Lewis pour former des composés d'addition avec différents acides de Lewis tels que le tétrachlorure de titane : Cl3P+-O- + TiCl4 → Cl3P+-O--TiCl4.
Le composé POCl3·AlCl3 résultant de l'addition de chlorure d'aluminium sur le trichlorure de phosphoryle est assez stable, de sorte que POCl3 peut être utilisé pour éliminer le chlorure d'aluminium du mélange résultant d'une réaction de Friedel-Crafts.
POCl3 réagit avec le bromure d'hydrogène en présence de chlorure d'aluminium pour former le tribromure de phosphoryle POBr3.Index. décimale : 667.9 Revêtements et enduits Résumé : The present study describes an attempt to induce the inherent flame retardancy to the epoxy resin by incorporation of phosphorous and boron atoms in the polymer backbone through the curing agents. Phosphorous (PPc)- and boron (BPc)-containing precursors were synthesized and incorporated into the commercial epoxy and hardener system with different molar ratios. The structures of the synthesized compounds were confirmed using hydroxyl value, Fourier transform infrared spectroscopy, and nuclear magnetic resonance spectroscopy. The thermal, physical, and mechanical properties of the cured films were performed using different testing methods. Thermogravimetric analysis and differential scanning calorimetry results showed the overall increased thermal stability and char yield along with the glass transition temperatures (Tg) due to the incorporation of newly synthesized phosphorus- and boron-containing compounds in the coating films. The mechanical properties and solvent resistance of the cured films were excellent. The flame-retardant properties of the cured films were increased with the incorporation of PPc and BPc. The highest limiting oxygen index was obtained for the formulation with equal amounts of PPc and BPc as 29 while UL-94 showed the self-extinguishing behavior within 10 s after ignition. Note de contenu : - MATERIALS AND METHODS : Materials - The reaction of isosorbide and POCl3 - The reaction of isosorbide and boric acid - Formulation of the epoxy coating films - Characterization
- RESULTS AND DISCUSSION : Physicochemical analysis - FTIR and NMR analysis - Thermal properties - Mechanical properties - Flame-retardant propertiesDOI : 10.1007/s11998-019-00262-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00262-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33741
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible The reinforcing effect of crosslinkable waterborne polyurethane/polysiloxane composite emulsion by aqueous sol–gel method / Yan Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : The reinforcing effect of crosslinkable waterborne polyurethane/polysiloxane composite emulsion by aqueous sol–gel method Type de document : texte imprimé Auteurs : Yan Wu, Auteur ; Junbao Wu, Auteur ; Yunxia Feng, Auteur Année de publication : 2020 Article en page(s) : p. 243-253 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Caractérisation
Composites à fibres de carbone -- Propriétés mécaniques
Diffractométrie de rayons X
Matériaux -- Renforcement
Micrographie
Polymères en émulsion
Polyuréthanes
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Sol-gel, Procédé
ThermogravimétrieIndex. décimale : 667.9 Revêtements et enduits Résumé : A highly branched polysiloxane (S2) was prepared by an aqueous sol–gel process and used as an underlying crosslinker to modify silanized waterborne polyurethane (WPUS), and a novel crosslinked waterborne polyurethane (WPU)/polysiloxane composite with low VOC features was obtained. The good dispersibility of polysiloxane (S2) was proved by both TEM and DLS analyses, implying that the polysiloxane had an excellent intermiscibility with the WPU. The larger silsesquioxane network in the composite was proved by XPS, which was generated from the condensation of the Si–OH groups of polysiloxane and WPUS. On the basis of tensile results, the content of polysiloxane had a significant impact on the mechanical properties. The reinforcing and toughening synergy effect was found in the composite with a low concentration of S2. According to micrographs of the fracture surface, the dominating toughening mechanism was dependent on microcracks, while the high concentration of polysiloxane turned into silica particles in the WPU matrix, resulting in force concentration and degradation of the mechanical properties. However, the Young’s modulus increased with the increasing content of S2. Additionally, the incorporation of the crosslinked silsesquioxane structure also improved the hydrophobic properties and thermal stability of the composite. Note de contenu : - EXPERIMENTAL : Materials - Preparation of highly branched polysiloxane (S2) in aqueous medium - Preparation of waterborne polyurethane/polysiloxane composite emulsion - Characterization
- RESULTS AND DISCUSSION : Characterization of highly branched polysiloxane - Dispersibility of aqueous polysiloxane - Siliceous structure - Mechanical properties - Micrographs of fracture surfaces - Dynamic mechanical properties - Microstructure during the film formation - XRD - Surface contact angle of composite - Thermogravimetric analysisDOI : 10.1007/s11998-019-00264-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00264-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33742
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Graphene oxide/waterborne polyurethane nanocoatings : effects of graphene oxide content on performance properties / C. Bernard in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Graphene oxide/waterborne polyurethane nanocoatings : effects of graphene oxide content on performance properties Type de document : texte imprimé Auteurs : C. Bernard, Auteur ; D. G. Goodwin, Auteur ; X. Gu, Auteur ; M. Celina, Auteur ; M. Nyden, Auteur ; D. Jacobs, Auteur ; L. Sung, Auteur ; T. Nguyen, Auteur Année de publication : 2020 Article en page(s) : p. 255-269 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Adsorption
Caractérisation
Charges (matériaux)
Inflammabilité
Matériaux hybrides
Oxyde de graphène
Oxygène
Perméabilité
Polymères en émulsion
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements en phase aqueuse
Revêtements organiques
ThermocinétiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Graphene oxide (GO) is a good nanofiller candidate for waterborne coatings because of its outstanding physical and mechanical properties, good dispersibility in water, and low cost relative to graphene. Here, we report on the performance of a one-part, waterborne polyurethane (WPU) nanocoating formulated with four different GO loadings ([0.4% to 2.0%] by mass). The degree of GO dispersion/adhesion was evaluated using scanning electron microscopy, laser scanning confocal microscopy, and Raman microscopy. Nanocoating performance was evaluated using a dynamic mechanical thermal analyzer for mechanical properties, a customized coulometric permeation apparatus for oxygen barrier properties, a combustion microcalorimeter for flammability, a hot disk analyzer for thermal conductivity, thermogravimetric analysis for thermal stability, and a moisture sorption analyzer for water uptake. The results show that GO sheets were well dispersed in, and have good adhesion to, WPU. At the higher mass loadings ([1.2% or 2%] by mass), GO increased the modulus and yield strength of WPU by 300% and 200%, respectively, increased the thermal conductivity by 38%, reduced the burning heat release rate (flammability) by 43%, and reduced the oxygen permeability by up to sevenfold. The presence of GO, however, increased water vapor uptake at high humidity; the moisture content of 2% mass loading GO/WPU nanocoatings at 90% RH was almost twice that of the moisture content for unfilled WPU. Overall, with the exception of water uptake at very high humidity (> 70% RH), the observed improvements in physical and mechanical properties combined with the ease of processing suggest that GO is a viable nanofiller for WPU coatings. Note de contenu : - EXPERIMENTAL MATERIALS AND METHODS : Materials and preparation of GO/WPU nanocoatings - Characterization of GO/WPU nanocoating properties
- RESULTS AND DISCUSSION : Characterization of GO/WPU nanocoating dispersion quality - Mechanical properties - Oxygen permeability - Water sorption of GO/WPU nanocoatings at different relative humidity levels - Flammability - Thermal conductivityDOI : 10.1007/s11998-019-00267-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00267-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33743
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Neural network-based UV adjustment of the photopolymer surface for modification of coating properties printed in flexography / Sanja Mahovic Poljacek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Neural network-based UV adjustment of the photopolymer surface for modification of coating properties printed in flexography Type de document : texte imprimé Auteurs : Sanja Mahovic Poljacek, Auteur ; Tamara Tomasegovic, Auteur ; Mirela Leskovac, Auteur ; Suzana Jakovljevic, Auteur Année de publication : 2020 Article en page(s) : p. 271-284 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Flexographie
Matériaux -- Epaisseur
Photopolymères
Réseaux neuronaux (informatique)
Revêtements -- Analyse
Revêtements -- Propriétés mécaniques
Revêtements organiques
Styrène-dièneIndex. décimale : 667.9 Revêtements et enduits Résumé : Processes of coating deposition often rely on printing techniques, with flexography being the most common one because of its ability to adjust the medium for the coating transfer (printing plate) to the specific type of coating and substrate by using photopolymer materials with different properties. Qualitative requirements for many types of coatings, especially in the printing industry, include uniformity, achieving desired thickness, definition of the edges of printed coating and optical density of colored coatings. This research was focused on the modification of the mechanical and surface properties of the common styrene–diene-based photopolymer materials in order to optimize the properties of the deposited coating—flexographic ink—by applying the UV post-treatment of the photopolymer. After the analyses of modified photopolymers, neural networks were built with the aim of finetuning of the photopolymer’s surface properties by the UV post-treatment. The results of the research enabled the analysis of the influence of changes that occur in the modified photopolymer material’s mechanical and surface properties on the coating thickness, optical density and printed element edge definition. Once the neural network was built, it enabled fast adjustment of the UV post-treatment of the photopolymer with the aim of optimizing the properties of the specific coating. Note de contenu : - EXPERIMENTAL : Preparation of the sample - Methods of measurement and analysis
- RESULTS AND DISCUSSION : Measurements of printing plates - Measurements of the printed coating - Neural network for the prediction of the photopolymer SFE componentsDOI : 10.1007/s11998-019-00270-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00270-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33744
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of surface activity of hot-dip galvanized steel after alkaline cleaning / Ville Saarimaa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Evaluation of surface activity of hot-dip galvanized steel after alkaline cleaning Type de document : texte imprimé Auteurs : Ville Saarimaa, Auteur ; Carl Lange, Auteur ; Teemu Paunikallio, Auteur ; Aaretti Kaleva, Auteur ; Juha-Pekka Nikkanen, Auteur ; Erkki Levänen, Auteur ; Pasi Väisänen, Auteur ; Antti Markkula, Auteur Année de publication : 2020 Article en page(s) : p. 285-292 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.
Alumine
Bases (chimie)
Caractérisation
Chimie des surfaces
Chrome -- Suppression ou remplacement
Dioxyde de carbone
Fluides supercritiques
Surfaces -- Nettoyage
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : The surface activity of hot-dip galvanized steel was evaluated after alkaline cleaning by exposing the cleaned specimens in humid supercritical carbon dioxide, followed by extraction and quantification of the formed corrosion products. Different free alkalinities of the cleaning bath were studied to obtain information on the evolution of zinc surface activity at different levels of surface etching. Surface reactivity of uncleaned galvanized steel is restricted and local, with major contributions from grain boundaries and intermetallic particles. Formation of zinc corrosion products took place in uncleaned samples exclusively on and around these sites. Al2O3 removal by alkaline cleaning gradually increased the surface activity. The major increase in surface activity was achieved when increasing the free alkalinity from 0.5 to 4.0 mEq/L, which was shown by formation of zinc corrosion products within zinc grains. The surface activity was confirmed by applying a titanium hexafluoride pretreatment on the cleaned panels and measuring the lateral microscale uniformity of the formed layer. The uniformity increased when larger areas of galvanized steel became activated by alkaline cleaning. Reactivity of zinc is rather difficult to quantify when setting up an industrial cleaning sequence for galvanized steel. Controlled exposure of cleaned samples in humid supercritical carbon dioxide, followed by quantification of oxidized zinc, provides a straightforward method to evaluate zinc reactivity. Note de contenu : - MATERIALS AND METHODS : Materials - Determination of free alkalinity - Humid supercritical carbon dioxide exposure - Quantification of oxidized zinc - Cleaning and pretreatment - Surface characterizations
- RESULTS : Effect of free alkalinity on Al2O3 removal - Exposure of cleaned HDG samples to humid scCO2 - Distribution of pretreatment chemical on cleaned samplesDOI : 10.1007/s11998-019-00272-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00272-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33745
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Gallic acid-derived phosphorus-based flame-retardant multifunctional crosslinking agent for PU coating / Megh Patel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Gallic acid-derived phosphorus-based flame-retardant multifunctional crosslinking agent for PU coating Type de document : texte imprimé Auteurs : Megh Patel, Auteur ; Siddhesh Mestry, Auteur ; Sonam Pratik Khuntia, Auteur ; Shashank T. Mhaske, Auteur Année de publication : 2020 Article en page(s) : p. 293-303 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Chimie analytique
Formulation (Génie chimique)
Humidité -- Absorption:Eau -- Absorption
Hydrolyse
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Phénoliques, AcidesUn acide-phénol (ou acide phénolique) est un composé organique possédant au moins une fonction carboxylique et un hydroxyle phénolique. La pratique courante en phytochimie consiste à réserver ce terme aux dérivés de l’acide benzoïque et de l’acide cinnamique.
Les acides hydroxybenzoïques dérivent par hydroxylation de l’acide benzoïque avec une structure de base de type C6-C1. Ces hydroxyles phénoliques OH peuvent ensuite être méthylés.
Exemples : l'acide gallique, élément constitutif des tanins hydroxylables et l'acide vanillique dont l'aldéhyde, la vanilline, est bien connue comme l'arôme naturel de vanille.
Les dérivés de l'acide cinnamique, les acides hydroxycinnamiques ont une structure de base de type C6-C3. Ils appartiennent à la grande famille des phénylpropanoïdes. Les hydroxyles phénoliques OH de ces dérivés peuvent aussi être méthylés (-O-CH3).
Exemples : l'acide paracoumarique, dont les lactones, les coumarines, sont largement distribuées dans tout le règne végétal, l'acide caféique, très large représentation chez les végétaux, souvent sous forme de l'acide chlorogénique (ester avec l'acide quinique), comme dans le grain de café, la pomme ou sous forme d'acide 1,3-dicaféylquinique (cynarine) dans l'artichaut et d'acide rosmarinique dans le romarin et le thé de Java (orthosiphon), l'acide férulique et l'acide sinapique.
Dans les plantes, ces acides-phénols sont souvent sous forme d'esters d'alcools aliphatiques ou d'esters de l'acide quinique, de l'acide rosmarinique ou de glycosides.
Polyuréthanes
Réticulants
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements organiques
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : The synthesis of the multifunctional phosphorus-based flame-retardant crosslinking agent is presented here. Gallic acid was selected as a raw material for the production of the desired product because of its availability (bio-based), multifunctional structure, and applicability of the various chemistries. Along with the carboxylic acid group, hydroxyl groups also have the tendency to react with the replaceable halogenated compounds and it was necessary to protect the hydroxyl groups by acetylation. The synthesis procedure follows acetylation, reaction with phenylphosphonic dichloride (PPDC), and deacetylation to obtain the final product (GA-P). The structure confirmation and the progress of the reactions were confirmed using hydroxyl and acid values, Fourier transform infrared (FTIR) spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy. The formed product was used as a crosslinking agent to produce the polyurethane coatings with different loadings and various thermal, mechanical, and flame-retardant properties that were studied. The thermal and the flame-retardant properties showed significant increase with increasing concentration of GA-P which were studied using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), limiting oxygen index (LOI), and UL-94 tests. The coating with the highest concentration of GA-P showed 27 LOI and self-extinguishing behavior within 10 s of ignition. The mechanical properties deteriorated with increasing concentration of GA-P due to the increased brittleness and crosslinking density. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of acetylated gallic acid (GA-Ac) - Reaction of GA-Ac and POCl3 - Hydrolysis of GA-Ac-P - Formulation of the coating films - Characterization
- RESULTS AND DISCUSSION : Physicochemical analysis - FTIR and NMR analysis - Thermal properties - Gel content and water absorption - Mechanical properties - FR propertiesDOI : 10.1007/s11998-019-00273-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00273-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33746
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings / Jari Vartiainen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings Type de document : texte imprimé Auteurs : Jari Vartiainen, Auteur ; Klaus Rose, Auteur ; Yukihiro Kusano, Auteur ; Juha Mannila, Auteur ; Lisa Wikström, Auteur Année de publication : 2020 Article en page(s) : p. 305-314 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Brillance (optique)
CelluloseLa 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.
Copolymères
Couches minces
Hydrophobie
Matériaux -- Propriétés barrières
Matières plastiques -- Revêtement
Microscopie électronique à balayage
Nanofibres
Rugosité
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : Single-layer films from cellulose nanofibrils on a plastic support were coated with sol–gel coated with inorganic–organic copolymers (ORMOCER®s), consisting of inorganic Si–O–Si-based networks combined with ceramic (Al–O– and Zr–O–) groups and special organic fluoroalkyl chain containing functional groups. Sol–gel coatings decreased the surface hydrophilicity and water vapor transmission rate. The water contact angle of uncoated films was 24°, indicating high affinity between water and the cellulose nanofibrils. All sol–gel coatings tested increased the surface hydrophobicity with the contact angles ranging between 54° and 102°. The water vapor transmission rates varied between 230 and 410 g/m2/day. With UV curable highly organically crosslinked coating, the water vapor transmission rate was decreased by 77% as compared to uncoated film. The uncoated film had oxygen transmission rates of 0.7 and 107 cc/m2/day at 50% and 80% RH, respectively. At high humidity conditions, the films tended to swell, thus allowing permeation to increase. Sol–gel coatings significantly improved the oxygen barrier properties especially at 80% RH. The transmission rates varied between 0.4 and 0.5 cc/m2/day (50% RH) and between 51 and 86 cc/m2/day (80% RH). Note de contenu : - Cellulose nanofibrils (CNF) and CNF films
- Sol-gel coatings
- Scanning electron microscopy (SEM)
- Roughness
- Gloss
- Contact angle measurements
- Oxygen permeation
- Water vapor permeationDOI : 10.1007/s11998-019-00292-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00292-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33747
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