Anticorrosive properties of the double-layer PANI-(graphene oxide)/epoxy coating in protecting carbon steel in saltwater / Ahmad Diraki in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 995-1006 Titre : Anticorrosive properties of the double-layer PANI-(graphene oxide)/epoxy coating in protecting carbon steel in saltwater Type de document : texte imprimé Auteurs : Ahmad Diraki, Auteur ; Sasha Omanovic, Auteur Année de publication : 2023 Article en page(s) : p. 995-1006 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Anticorrosifs Anticorrosion Caractérisation Electrochimie Epoxydes Métaux -- Revêtements protecteurs Oxyde de graphène Polyaniline Revêtements multicouches Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : The work reports result in improving the anticorrosive properties of a commercial epoxy coating by forming a double-layer coating structure. First, a thin (ca. 5 μm) electrically conductive polyaniline (PANI) coating was wormed directly on the carbon steel (CS) surface, on top of which a thicker (ca. 20 μm) epoxy coating was applied. The inner PANI layer was also loaded with graphene oxide (GO). The resulting anticorrosive properties of the coatings were investigated in 3.5 wt.% NaCl employing electrochemical techniques, while the surface and cross-sectional morphology of the coatings was examined by scanning electron microscopy (SEM). The results showed that the commercial epoxy coating started gradually failing several days after its exposure to the electrolyte, while it took 37 days for larger pores to appear in the PANI/epoxy coating, which then gradually continued to fail. On the other hand, the PANI-GO/epoxy coating maintained its high corrosion resistance, without forming impedance-detectable pores, over the entire testing period (two months). The excellent corrosion protection properties of the PANI-GO/epoxy coating were prescribed solely to the presence of the underlying PANI-GO layer, which represents a better barrier for the transport of hydrated corrosive ions to the CS surface, through the combined action of charge (repulsion of hydrated corrosive anions and iron oxide film formation), surface energy (hydrophobicity), and blocking mechanisms. Note de contenu : - EXPERIMENTAL : Materials - Instrumentation - Sample preparation - Preparation of the coatings - Corrosion measurements - Surface characterization - RESULTS AND DISCUSSION : Physical characterization of the coatings - Anticorrosive properties of the coatings-electrochemical measurements - Long-term corrosion study - Table 1 : Technical characteristics of the profilometer - Table 2 : Corrosion current determined from Tafel measurements recorded on the naked (unprotected) CS surface and the CS surface protected by the three coatings - Table 3 : EEC parameter values obtained by modelling the EIS spectra presented in Fig. 5 DOI : https://doi.org/10.1007/s11998-022-00719-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00719-6.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39443 [article]

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Antistatic and antibacterial two-component waterborne polyurethane coating / Xianwen Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 869-881 Titre : Antistatic and antibacterial two-component waterborne polyurethane coating Type de document : texte imprimé Auteurs : Xianwen Li, Auteur ; Xinmeng Xu, Auteur ; Faai Zhang, Auteur Année de publication : 2023 Article en page(s) : p. 869-881 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Antistatiques Caractérisation Cuivre Nanoparticules Polyaniline Polyuréthanes Revêtements bi-composant Revêtements en phase aqueuse Revêtements organiques Zircone Le dioxyde de zirconium ou oxyde de zirconium(IV) couramment appelée zircone est un composé inorganique du zirconium de formule ZrO2. Ce matériau est une céramique technique d'aspect opaque. Appelé CZ (Cubic Zirconia) lorsque transparent, il est utilisé pour imiter le diamant. Il ne faut pas le confondre avec le zircon (ZrSiO4). Sous sa forme tétragonale, l'oxyde de zirconium est un matériau a vocation mécanique, cette évolution cristallographique lui confère une dureté très élevée (1200Hv) ainsi qu'une bonne résistance aux sollicitations mécaniques (700Mpa en traction et 2000Mpa en compression). Une fois polie, la zircone tétragonale peut atteindre un Ra de 0,02, ce qui permet de l'utiliser pour des pièces de frottement. Index. décimale : 667.9 Revêtements et enduits Résumé : Hydroxyl acrylate emulsion was prepared firstly by the semicontinuous seeded emulsion polymerization, and then adding polyaniline (PANI)/Cu/ZrO2 ternary nanocomposites, two-component waterborne polyurethane (2 K WPU) composite coatings with antistatic and antibacterial properties were obtained by mixing the emulsion with hydrophilic modified polyisocyanate. The structure and morphology of the PANI/Cu/ZrO2 were observed by Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffractometer. The thermal, antistatic, antibacterial, anticorrosion, and mechanical properties of the 2 K WPU composite coatings were determined. The results showed that the addition of the ternary nanocomposites increased the antistatic, antibacterial, anticorrosion, and mechanical properties of the 2 K WPU coating. The initial decomposition temperature increased from 200 to 225°C, and the tensile strength increased by 44.4%. The coatings still maintained good impact strength of 50/50 kg cm, adhesion of grade 2, flexibility of 1 mm, pendulum hardness of 293 s, and the gloss (60°) of 119.4. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of PANI/Cu and PANI/Cu/ZrO 2 nanocomposites - Preparation of hydroxyl acrylate emulsion - Preparation of 2 K WPU film - Preparation of antibacterial and antistatic - 2 K WPU coatings - Preparation of culture medium - Characterization - Determination of surface electric resistance - Qualitative antibacterial test - Quantitatively antibacterial test - Coating anticorrosion resistance testing - Tinplate surface analysis - Adhesion, pendulum hardness, impact resistance, and gloss of films testing - Mechanical properties test - RESULTS AND DISCUSSION : FTIR - SEM images - XRD - Thermogravimetric analysis (TGA) - Antistatic property - Antibacterial property - Anticorrosion performance of the composite coatings - Coating performance of 2 K WPU composite - Table 1 : Effect of PANI/Cu/ZrO2 content on film performance of 2 K WPU DOI : https://doi.org/10.1007/s11998-022-00708-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00708-9.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39434 [article]

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Application of polyaniline/nylon composites coating for corrosion protection of steel / R. Ansari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 2 (06/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 2 (06/2009) . - p. 221-227 Titre : Application of polyaniline/nylon composites coating for corrosion protection of steel Type de document : texte imprimé Auteurs : R. Ansari, Auteur ; Amir H. Alikhani, Auteur Année de publication : 2009 Article en page(s) : p. 221-227 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosion Corrosion Métaux -- Revêtements protecteurs Polyamide 66 Polyaniline Index. décimale : 667.9 Revêtements et enduits Résumé : In this research, we investigated the corrosion inhibition properties of polished steel plates (low carbon) coated with a polyaniline (emeraldine base form) blend with nylon 66 (termed PANi/Ny) via cast method with formic acid as the solvent. Polyaniline (PANi) was prepared chemically from aqueous solution using aniline (0.2 M) as a monomer and ammonium persulfate (0.2 M) as an oxidant. The polymer powder produced was changed into emeraldine base (EB) form after treatment with dilute ammonia solution (0.5 M) in order to do further processing. The corrosion experiments were performed in the open circuit, exposing samples to different aggressive and corrosive conditions (e.g., NaCl, HC1). To produce a good comparison, the corrosion study was performed on both polymer-coated and bare-steel samples. Corrosion monitoring was performed by simple immersion tests and determination of the concentration of iron ions and metal weight loss in test solutions. It was found that PANi/Ny coatings can provide an anodic protection against corrosive environments in which the metals are exposed. The corrosion rate for the polymer coated steel was significantly lower than the bare steel (~10-15 times). DOI : 10.1007/s11998-008-9140-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9140-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5622 [article]

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Assessment of lignin as a carbon source in intumescent coatings containing polyaniline / A. F. Baldissera in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1297–1307 Titre : Assessment of lignin as a carbon source in intumescent coatings containing polyaniline Type de document : texte imprimé Auteurs : A. F. Baldissera, Auteur ; M. R. Silveira, Auteur ; A. C. Dornelles, Auteur ; C. A. Ferreira, Auteur Année de publication : 2020 Article en page(s) : p. 1297–1307 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Enrobage (technologie) Essais d'adhésion Essais de comportement au feu Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Intumescence (chimie) Lignine La lignine est un des principaux composants du bois, avec la cellulose, l'hémicellulose et des matières extractibles. La lignine est présente principalement dans les plantes vasculaires et dans quelques algues. Ses principales fonctions sont d'apporter de la rigidité, une imperméabilité à l'eau et une grande résistance à la décomposition. Toutes les plantes vasculaires, ligneuses et herbacées, fabriquent de la lignine. Quantitativement, la teneur en lignine est de 3 à 5 % dans les feuilles, 5 à 20 % dans les tiges herbacées, 15 à 35 % dans les tiges ligneuses. Elle est moindre pour les plantes annuelles que pour les vivaces, elle est maximum chez les arbres. La lignine est principalement localisée entre les cellules (voir parois pectocellulosiques), mais on en trouve une quantité significative à l'intérieur même de celles-ci. Bien que la lignine soit un réseau tridimensionnel hydrophobe complexe, l'unité de base se résume essentiellement à une unité de phénylpropane. La lignine est le deuxième biopolymère renouvelable le plus abondant sur la Terre, après la cellulose, et, à elles deux, elles cumulent plus de 70 % de la biomasse totale. C'est pourquoi elle fait l'objet de recherches en vue de valorisations autres que ses utilisations actuelles en bois d'Å“uvre et en combustible. Voie de biosynthèse : La lignine est une molécule dont le précurseur est la phénylalanine. Cet acide aminé va subir une cascade de réactions faisant intervenir une dizaine de familles d'enzymes différentes afin de former des monolignols. Ces enzymes sont : phénylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), 4-coumarate:CoA ligase (4CL), hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyl transferase (HCT), p-coumarate 3-hydroxylase (C3H), caffeoyl-CoA o-methyltransferase (CCoAOMT), cinnamoyl-CoA reductase (CCR), ferrulate 5-hydroxylase (F5H), caffeic acid O-methyltransferase (COMT) et cinnamyl alcohol deshydrogenase (CAD). Dans un certain nombre de cas, des aldéhydes peuvent également être incorporés dans le polymère. Polyaniline Revêtements organiques Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Lignin, a vegetable compound, is the second most abundant biorenewable and biodegradable polymer in nature. In this study, the addition of this compound to paints containing ammonium polyphosphate (APP) and expandable graphite as pigments was investigated to improve the fire protection performance of intumescent coatings. The combination of lignin with polyaniline (PANI) in the formulations was also evaluated, as previous studies have shown that PANI-based paints show promising results in intumescent coatings. For this purpose, the thermal protection of mild steel samples coated with these organic coatings was evaluated during a fire resistance test, with the sample exposed to a Bunsen torch. During the test, temperature data and thermography images for the steel surface were collected. The coatings were also evaluated by thermogravimetric analysis and microscale combustion calorimetry. It was found that all coatings formulated provided good fire protection to the steel substrate and the lignin could be a good option to replace nonrenewable sources in intumescent paints, since the sample coated with the paint containing 10 wt% lignin reached 230°C after 30 min of assay. In addition, when this compound was used in combination with PANI, the flame protection was even better. The best performance was observed for the paint formulated with combination of 10 wt% lignin and 10 wt% PANI-ES, whose metal substrate temperature was 170°C after 30 min of assay. Note de contenu : - EXPERIMENTAL : Synthesis of PANI-ES - Preparation of paints - Sample preparation - Fire resistance test - Characterization - RESULTS AND DISCUSSION : Adherence test - Thermogravimetric analysis - Fire resistance test - Digital optical microscopy - SEM–EDS - Microscale combustion calorimeter (MCC) DOI : https://doi.org/10.1007/s11998-020-00348-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00348-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34575 [article]

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Bond strength of hybrid sol-gel coatings with different additives / Mousa May in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 3 (05/2013) . - p. 407-413 Titre : Bond strength of hybrid sol-gel coatings with different additives Type de document : texte imprimé Auteurs : Mousa May, Auteur ; Heming Wang, Auteur ; Robert Akid, Auteur Année de publication : 2013 Article en page(s) : p. 407-413 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Alumine Dioxyde de titane Microscopie Microscopie électronique à balayage Nanoparticules Polyaniline Revêtements Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : The hybrid sol–gel coating on Al 2024-T3 was modified by adding polyaniline, TiO2, or γ-Al2O3 nanoparticles in the formulation separately. The coating was then used as an adhesive to bond Al 2024-T3 alloys, forming a single lap joint. The bond strength of the sol–gel coating was investigated using a universal tensile test machine. The lap shear strength of the original sol–gel coating was about 1.38 MPa and it was increased up to 2.26 MPa after the modification by adding 0.05 wt% PANI microparticles in the sol–gel coating. The small increase in strength was attributed to an improvement in its adhesive flexibility because of incorporation of the long-chain organic polymer in its structure. Furthermore, the addition of different amounts of TiO2 nanoparticles in the unmodified sol–gel coating also led to an increase in shear strength compared to the undoped sol–gel coating. Typically, a sol–gel coating containing 2.0 wt% of TiO2 recorded the highest adhesive strength of about 4.0 MPa. A similar increase in strength was observed when doping γ-Al2O3 nanoparticles into the original hybrid sol–gel coating. Adding 0.5 wt% of γ-Al2O3 in the sol–gel coating increased the adhesive bonding strength up to 4.48 MPa. The fracture surface of the specimen was separately observed by SEM and Optical Microscopy in order to examine potential evidences of mechanism and nature of failure. The reason why the adhesive strength increased after the modification of the sol–gel coating is discussed in this article. Note de contenu : - EXPERIMENTAL WORK : Materials - Preparation of adhesion samples - Adhesion strength measurements - RESULTS AND DISCUSSION : Bond strength of hybrid sol-gel coatings - EFFECTS OF DIFFERENT ADDITIVES ON THE SOL-GEL ADHESIVE STRENGTH : Doping 0.05% PANI - Effects of the addition of TiO2 nanoparticules - Effects of the addition of γ-Al2O3 nanoparticles - FTIR characterization of the fracture surface DOI : 10.1007/s11998-012-9450-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9450-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18739 [article]

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Characterization and corrosion protection properties of composite material (PANI+TiO2) coatings on A304 stainless steel / Souhila Abaci in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)  

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Comparison of corrosion protection between double strands of polyaniline and poly-o-anisidine with poly(acrylic acid-co-acryl amide) on steel / M. R. Mahmoudian in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 1 (01/2012)  

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Conducting polymers for corrosion protection : a review / Pravin P. Deshpande in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 4 (07/2014)  

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Conductive coatings / Kunal V. Yeole in PAINTINDIA, Vol. LXI, N° 9 (09/2011)

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Conductive polymers / Paresh Narendra Darshani in PAINTINDIA, Vol. LXIII, N° 2 (02/2013)

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Conductive polymers as anticorrosive additive for marine coatings : a review / Umesh Wagh in PAINTINDIA, Vol. LXX, N° 9 (09/2020)  

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Corrosion performance of chemically synthesized poly(aniline-co-o-toluidine) copolymer coating on mild steel / M. Mobin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 1 (01/2012)  

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Corrosion protection by organic coatings containing polyaniline salts prepared by oxidative polymerization / M. Kohl in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)  

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Corrosion protection of magnesium alloy ZM21 by polyaniline-blended coatings / S. Sathiyanarayanan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 4 (12/2008)  

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Corrosion protection of mild steel by nano-colloidal polyaniline/nanodiamond composite coating in NaCl solution / Habib Ashassi-Sorkhabi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)  

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Curing kinetic of epoxy oligomers in the presence of polyaniline / V. Kurbatov in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4636 (11/2017)  

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Direct electroplating of nickel on ABS plastic using polyaniline–silver surface composite synthesized using different acids / Maryam Mehdizadeh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)  

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Dispersions aqueuses de polyaniline pour la protection contre la corrosion / François-Xavier Perrin in DOUBLE LIAISON, N° 610 (05/2016)

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Effect of polyaniline-modified glass fibers on the anticorrosion performance of epoxy coatings / Xiaoman Hou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)  

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Effects of conductive polymers (type and concentration) in coatings with zinc particles of different shapes / M. Kohl in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)  

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