Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Synthesis of phytic acid-layered zinc oxide hybrid nanoparticles and their flame-retardant applications in polyurethane coatings / Karan Bansal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)
[article]
Titre : Synthesis of phytic acid-layered zinc oxide hybrid nanoparticles and their flame-retardant applications in polyurethane coatings Type de document : texte imprimé Auteurs : Karan Bansal, Auteur ; Siavash Mansouri, Auteur ; Dilpreet Bajwa, Auteur ; Shanti Swarup, Auteur ; Mohiuddin Quadir, Auteur Année de publication : 2024 Article en page(s) : p. 369-382 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Enrobage (technologie)
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Nanoparticules -- Synthèse
Oxyde de zinc
Phytique, Acide
Polyuréthanes
Revêtements -- Additifs
Revêtements -- Propriétés thermiques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Phytic acid (PA)-coated zinc oxide (ZnO) nanoparticles were developed to produce high-efficiency flame-retarding (FR) additives for coating formulations. These hybrid (organic/inorganic) additives were fabricated using a layer-by-layer (LBL) approach to harness the FR properties of PA and ZnO on a single-platform nanoscale scaffold. These nanoparticles can be uniformly dispersed in a polyurethane (PU) coating for applications on metal substrates. The incorporation of the PA/ZnO layer-by-layer nanoparticles at 20 wt% of the polymeric resin did not adversely affect the physico-mechanical properties of the coatings. Flame-retardant properties of PU samples containing nanomaterials, showed a 50% reduction in flame spread rate than that observed from the samples prepared with only ZnO nanoparticles. Cone calorimeter studies performed on the metal panels coated with 20 wt% PA/ZnO nanoparticles-infused PU resins showed a 25% reduction in peak heat release rate and a 50% reduction in total heat release (THR) compared to control coatings prepared without nanoparticles. Scanning electron microscopy images revealed the presence of bubble-like morphologies in the burnt samples containing the nanoparticles, indicating char formation and obstruction of escaping gases produced during the burning of the coating materials. This study clearly reveals that the coatings prepared with PA/ZnO hybrid nanoparticles can protect metal substrates against fire-related damage. Note de contenu : - MATERIALS : Methods - Characterization of nanoparticles - Characterization of PU coatings on metal substrates
- RESULTS AND DISCUSSION : Synthesis of PA-layered ZnO nanoparticles as functional FR nanomaterials - Nano-chemical and thermal characterization of nanoparticles - Incorporation of PA-layered ZnO nanoparticles in PU coatings and analysis of coating properties - Characterization of thermal properties of PU coatings containing PA/ZnO nanoparticles using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) -
Evaluation of FR properties using cone calorimeter studies - Horizontal burning test of UL-94 samples prepared from nanoparticle-infused PU resins
- Table 1 : Particle size (hydrodynamic diameter) of the nanoparticles along with PDI and zeta potential
- Table 2 : Coating properties of polyurethane (PU) formulations containing ZnO nanoparticles and ZnO/PA-BL nanoparticles at different loading concentrations
- Table 3 : Glass transition temperature (Tg), degradation temperature at 5% weight loss (Td5), and weight remaining of the film after exposure to 500°C of the polyurethane coatings
- Table 4 : Time to ignition (TTI), peak heat release rate (pHRR), total heat release (THR), total smoke release (TSR), and flame retardancy index (FRI) of control coating and coatings containing ZnO and ZnO/PA-BL nanoparticles at 20 wt% loading concentrationDOI : https://doi.org/10.1007/s11998-023-00828-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00828-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40459
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 369-382[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24443 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of porous magnetite Fe3O4 and its application in thermal control coatings as new black pigment / Moslem Mashayekhi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)
[article]
Titre : Synthesis of porous magnetite Fe3O4 and its application in thermal control coatings as new black pigment Type de document : texte imprimé Auteurs : Moslem Mashayekhi, Auteur ; Kamal Ghani, Auteur ; Reza Shoja Razavi, Auteur ; Narges Kiomarsipour, Auteur Année de publication : 2015 Article en page(s) : p. 1065-1071 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Lumière -- Absorption
Magnétite
Matériaux poreux
Oxyde de fer
Pigments -- Synthèse
Pigments inorganiques
Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present work, firstly, porous magnetite Fe3O4 was synthesized using mesoporous silica molecular sieve (SBA-15) as a template. Finally, the infiltrated ferrous precursor into silica mesopores was subjected to an infiltration process, in order to obtain the porous Fe3O4. The structural, morphological, and porosity characteristics and optical property of as-synthesized material were investigated by X-ray diffraction, field emission scanning electron microscopy, N2 adsorption, and diffuse reflectance spectroscopy. Evaluation of the obtained results indicated that the porous Fe3O4 has well-defined morphology and higher light absorption in the UV/Vis region than not only the common Fe3O4 and the other inorganic black pigments, but also common carbon black. Investigation of the prepared coating with this pigment indicated the higher absorption (0.98) and lower reflectance (~2%) than commercial black thermal control coatings (TCC) with inorganic pigments. This pigment presents the best selection for black TCC with inorganic pigment and stable in the space environment. The as-prepared porous magnetite Fe3O4 also has high surface area (~24.78 m2/g) and excellent magnetic properties (M s = 70 emu/g) at room temperature. Note de contenu : - Reagent and materials
- Preparation of SBA-15 template
- Preparation of porous Fe3O4
- Paint preparation
- Materials characterizationDOI : 10.1007/s11998-015-9700-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9700-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24958
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 6 (11/2015) . - p. 1065-1071[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17585 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of silicone-acrylic-modified high-ortho novolac resin with enhanced thermal resistance and surface coating properties / Serkan Emik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Synthesis of silicone-acrylic-modified high-ortho novolac resin with enhanced thermal resistance and surface coating properties Type de document : texte imprimé Auteurs : Serkan Emik, Auteur ; Tülin Banu Iyim, Auteur ; Saadet özgümüs, Auteur Année de publication : 2021 Article en page(s) : p. 1679-1690 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Caractérisation
Polymères -- Synthèse
Résistance à l'humidité:Résistance à l'eau
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés physiques
Revêtements -- Propriétés thermiques
Revêtements organiques
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).
VinyltriméthoxysilaneIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present study, vinyltrimethoxysilane was used to modify high-ortho novolac resin (NR) to obtain a vinyl silicone-modified phenolic oligomer (Si-mod NR). Subsequently, this oligomer is polymerized with methyl methacrylate. The mid-products (NR and Si-mod NR) and synthesized silicone-modified phenolic/acrylic resin (Ac/Si-mod NR) were characterized by Fourier transform infrared spectroscopy, and thermal properties were investigated by using thermal gravimetric analysis and differential scanning calorimetry techniques. In addition, the surface coating properties, including drying, hardness, adhesion, impact resistance, gloss, acid, alkaline, water, and solvent resistance of the films prepared from these products, were comparatively investigated. The results showed that the modification reactions yield a novel resin (Ac/Si-mod NR), which can be easily used as a surface coating material with high thermal resistance, flexibility, and excellent film properties. Note de contenu : - EXPERIMENTAL : Material and instruments - Synthesis of high-ortho novolac resin (NR) - Synthesis of silane and vinyl-modified novolac intermediate (Si-mod NR) - Polymerization of Si-mod NR intermediate with the acrylic monomer (Ac/Si-mod NR) - Film preparation - Characterization of surface coating properties
- RESULTS AND DISCUSSION : Synthesis and characterization studies - Film properties of the products -
- Table 1 : The list of surface coating test standards
- Table 2 : Specific weight loss temperatures and the char yields of the products
- Table 3 : Film properties of the products (drying, adhesion, hardness, impact resistance, and gloss)
- Table 4 : Water resistance properties of the films
- Table 5 : Alkaline resistance properties of the films
- Table 6 : Acid resistance properties of the films
- Table 7 Solvent resistance properties of the filmsDOI : https://doi.org/10.1007/s11998-021-00527-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00527-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36825
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1679-1690[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible The influence of methacrylic acid and urethane methacrylate on the film properties of hybrid urethane–acrylic latexes in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : The influence of methacrylic acid and urethane methacrylate on the film properties of hybrid urethane–acrylic latexes Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 1557-1577 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Composés organiques -- Synthèse
Copolymère uréthane acrylique
Extrait sec
Formation de film
Formulation (Génie chimique)
Granulométrie
Méthacrylate d'uréthane
Méthacrylique, AcideL'histoire de l'acide méthacrylique commence en 1865, année où il est synthétisé pour la première fois à partir du méthacrylate d'éthyle.
L'acide méthacrylique est très réactif avec les groupes carboxyles, vinyles et esters.
Poids moléculaires
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements organiques
Transition vitreuse
ViscoélasticitéIndex. décimale : 667.9 Revêtements et enduits Résumé : A non-isocyanate pathway was used to synthesize a urethane methacrylate monomer, 2-((methylcarbamoyl)oxy)ethyl methacrylate (MEM) and methacrylic acid (MAA). The MEM and MAA mixture was copolymerized with MMA and BA in a semicontinuous monomer-starved process to prepare latexes via emulsion polymerization. Varying amounts of MEM and MAA monomers were introduced to the latex, and their effect on the thermal properties, film formation, viscoelastic, mechanical and morphological properties was examined. The upper limit functionality concentration was evaluated based on the latex stability. Incorporation of MEM and MAA in latexes enhanced film formation properties displayed by lowering MFFT. MEM and MAA functionalized latexes exhibited enhanced Young’s modulus, tensile strength and hardness compared to the control latex without any MEM and MAA. Note de contenu : - EXPERIMENTAL : Materials - Instrumentation - Synthesis of monomers and latexes - Synthesis of latexes - Latex characterization
- RESULTS : Characterization of MEM+MAA - Latex conversion, particle size and molecular weight - Thermal properties and film formation - Viscoelastic properties - Mechanical properties - Morphological properties—TEM - Morphological properties—AFM - Coatings properties
- Table 1 Latex formulations for 0, 2, 5 and 10 mol% MEM+MAA
- Table 2 Solids content, overall conversion, particle size and Mw− results of MEM+MAA latexes
- Table 3 Glass transition temperature, minimum film formation temperature, and their difference for MEM+MAA latexes
- Table 4 Viscoelastic properties of MEM+MAA latexes as a function of increasing functionality of MEM+MAA
- Table 5 Roughness data for 0, 2, 5 and 10 mol% MEM+MAA latex
- Table 6 Coatings tests results for MEM+MAA latexes as a function of increased functionality from 0 to 10 mol%DOI : https://doi.org/10.1007/s11998-021-00497-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00497-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36808
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1557-1577[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Thermal measurements of coating films used for surface insulation and protection / K. C. Paul in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)
[article]
Titre : Thermal measurements of coating films used for surface insulation and protection Type de document : texte imprimé Auteurs : K. C. Paul, Auteur ; N. R. Chakraborty, Auteur ; A. K. Ghosh, Auteur ; A. K. Pal, Auteur Année de publication : 2004 Article en page(s) : p. 137-141 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dilatation (thermodynamique)
Polyuréthanes
Primaire (revêtement)
Revêtement émail:Peinture-émail
Revêtements -- Propriétés thermiques
Revêtements:Peinture
ThermocinétiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Environmental corrosions on metallic substrates are successfully protected using paints and primers. The situation demands all these to be adhered on to the surfaces in the form of films. These adherent films are not long lasting always. It is envisaged that impact of temperature changes may be one of the most vital reasons for this situation.
Careful measurements of thermal properties of films made of red oxide primers, and polyurethane-based synthetic enamel paint are made in the present work. These properties include the thermal conductivity, specific heat and coefficient of thermal expansion. The results obtained reveals the utilisation of primers as thermal insulators and paints as conductors. These findings may also be helpful for better adhesion to and causes of unwanted removal of such films from different metallic substrates.Note de contenu : - Thermal conductivity
- Thermal diffusivity
- Specific heat
- Coefficient of linear expansion
- Table 1 : Thermal properties of various samples
- Table 2 : ray diffraction analysisDOI : 10.1007/BF02699608 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699608.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5474
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B2 (06/2004) . - p. 137-141[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 000391 - Périodique Bibliothèque principale Documentaires Disponible Thermal properties of intumescent coating with waterborne melamine-acrylic emulsion resin for plywood / Chih-Shen Chuang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)
PermalinkPermalinkPermalinkTwo-component UV-curable waterborne CO2-based polyurethane dispersion with outstanding flexibility / Zhu Ding in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
PermalinkValorization of almond shells' lignocellulosic microparticles for controlled release urea production : interactive effect of process parameters on longevity and kinetics of nutrient release / Babar Azeem in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
PermalinkWaterborne epoxy resins modified by reactive polyacrylate modifier with fluorinated side chains / Hongyi Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
Permalink