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Preparation of alkali-resistant aluminum pigment encapsulated with fluoropolymer by in situ polymerization / Pengchao Men in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
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Titre : Preparation of alkali-resistant aluminum pigment encapsulated with fluoropolymer by in situ polymerization Type de document : texte imprimé Auteurs : Pengchao Men, Auteur ; Jihong Liang, Auteur ; Jinxuan He, Auteur ; Jian Chen, Auteur ; Bing Geng, Auteur ; Wei Li, Auteur Année de publication : 2021 Article en page(s) : p. 1227-1235 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Anticorrosifs
Anticorrosion
Bases (chimie)
Caractérisation
Encapsulation
Fluoropolymères
Pigments métalliques
Polyméthacrylate de trifluoroéthyle
Résistance chimique
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Flaky aluminum pigments with excellent corrosion resistance have found applications in diverse fields. In this study, a fluoropolymer has been incorporated in the aluminum pigment to effectively enhance its corrosion resistance, along with the improvement in the chemical resistance and thermal stability. Specifically, a uniform dense layer of poly(trifluoroethyl methacrylate) (PTFEMA) has been directly coated on the surface of the flaky aluminum pigment by in situ polymerization. The encapsulated aluminum pigment exhibited high stability upon dipping in the alkaline solution (pH = 13) due to protection imparted by the fluoropolymer layer. The morphology of the fluoropolymer layer on the surface of the aluminum pigment was characterized by scanning electron microscopy (SEM). Moreover, the thermal stability of the encapsulated aluminum pigment was analyzed by thermogravimetric analysis (TG). The structure and composition of the fluoropolymer layer were further characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The stability of the aluminum pigment in alkaline aqueous media was investigated via hydrogen evolution experiments. Overall, the corrosion resistance of the aluminum pigment encapsulated with fluoropolymer was observed to be markedly improved owing to the presence of the PTFEMA layer. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of PTFEMA/Al - Characterization
- RESULTS AND DISCUSSION : Characterization of the raw aluminum and PTFEMA/Al particles by SEM - Characterization of the raw Al and PTFEMA/Al particles by FTIR - Characterization of the raw Al and PTFEMA/Al particles by XPS - Characterization of the raw Al and PTFEMA/Al particles by TG - The effect of TFEMA and TMPTMA on the anticorrosion properties of modified aluminum powder - Spraying of the metallic paint containing the aluminum pigmentDOI : https://doi.org/10.1007/s11998-021-00481-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00481-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36427
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1227-1235[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22991 - Périodique Bibliothèque principale Documentaires Disponible Preparation of light color antistatic and anticorrosive waterborne epoxy coating for oil tanks / Zhong-Hua Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 2 (06/2008)
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Titre : Preparation of light color antistatic and anticorrosive waterborne epoxy coating for oil tanks Type de document : texte imprimé Auteurs : Zhong-Hua Chen, Auteur ; Yin Tang, Auteur ; Fei Yu, Auteur ; Jian-Hua Chen, Auteur ; Hai-Hong Chen, Auteur Année de publication : 2008 Article en page(s) : p. 259-269 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Antistatiques
Conduction électrique
Pigments
Réservoirs (récipients)
Réservoirs (récipients) -- revêtements protecteurs
Réservoirs d'huile (automobile)
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Utilizing waterborne epoxy resin as a main film-forming material, a kind of light color antistatic and anticorrosive waterborne epoxy coating with volume resistivity of [10 sup.6] [ohm]m was prepared by adding light color conductive pigments and anticorrosive pigments. The coating has excellent corrosion protective and outstanding decorating properties, which is applicable for the inner coating of oil tank. The effects of the type and the amount of conductive pigments, the film thickness, the curing temperature, and the curing time on the volume resistivity of the film were discussed. The properties of the several kinds of waterborne epoxy resin were compared and the determining of anticorrosive pigments was discussed. DOI : 10.1007/s11998-007-9063-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9063-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3002
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 2 (06/2008) . - p. 259-269[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010394 - Périodique Bibliothèque principale Documentaires Disponible Preparation of modified montmorillonite/graphene oxide composites to enhance the anticorrosive performance of epoxy coatings / Quanxian Hua in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
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Titre : Preparation of modified montmorillonite/graphene oxide composites to enhance the anticorrosive performance of epoxy coatings Type de document : texte imprimé Auteurs : Quanxian Hua, Auteur ; Ben Jing, Auteur ; Mengyuan He, Auteur ; Panfei Sun, Auteur ; Qiang Zhao, Auteur ; Shilong Su, Auteur ; Guanjie Hu, Auteur ; Songjie Li, Auteur Année de publication : 2023 Article en page(s) : p. 1110-1119 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Composés organiques -- Synthèse
Electrochimie
Epoxydes
Hydrophobie
Montmorillonite
Oxyde de graphène
Réaction de couplage
Revêtements organiques
SilanesIndex. décimale : 667.9 Revêtements et enduits Résumé : Modified montmorillonite/graphene oxide composites (AM@GO) were prepared by a hydrothermal method with silane coupling agent-modified montmorillonite (APTES@MMT) and combined with GO. The structures of the composites were characterized by FTIR, XRD, Raman spectroscopy, BET analysis, and SEM. The results showed that the composites had increased interlayer spacing and formed a loosely laminated stacked structure. The specific surface area (31.6863 m2/g) and pore volume (0.0104 cm3/g) of the composites increased. The hydrophobic and anticorrosive properties of the composite coatings were investigated and compared to the epoxy coating. The composite coatings (AM@GO/EP) had larger contact angles and smoother surfaces than the epoxy coating (EP). After 30 days of immersion, the value of |Z|0.01 Hz was approximately 1011 Ω cm2, which had changed slightly since initial immersion. Mechanistic analysis shows that the improved corrosion resistance of the composite coatings was due to the high specific surface area of the 2D material, the oxygen-containing groups of GO, the amino groups of APTES@MMT and the synergy between the MMT and the GO nanosheets. Note de contenu : - Materials
- Synthesis of APTES@MMT(AM)
- Synthesis of GO
- Synthesis of AM@GO
- Epoxy composite coating preparation
- Electrochemical measurements
- Structural characterization
- Table 1 : Impedance values of different types of coatings under different immersion daysDOI : https://doi.org/10.1007/s11998-022-00731-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00731-w.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39451
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 1110-1119[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24069 - Périodique Bibliothèque principale Documentaires Disponible Preparation of PVA/PU/PUA microcapsules and application in self-healing two-component waterborne polyurethane coatings / Xinmeng Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
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Titre : Preparation of PVA/PU/PUA microcapsules and application in self-healing two-component waterborne polyurethane coatings Type de document : texte imprimé Auteurs : Xinmeng Xu, Auteur ; Zhongqun Zhou, Auteur ; Liangrong Qin, Auteur Année de publication : 2022 Article en page(s) : p. 977-988 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Microcapsules
Polyacétate de vinyle
Polymères -- Synthèse
Polyurée
Polyuréthanes
Revêtement autoréparant
Revêtements bi-composant
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : It is difficult to produce coatings that have good mechanical and self-healing properties. In this study, polyvinyl alcohol/polyurethane/polyurea (PVA/PU/PUA) microcapsules (MCs) loaded with isophorone diisocyanate (IPDI) as core materials were first prepared by interfacial polymerization in an oil-in-water emulsion using different PVA as an emulsifier. The MCs were then uniformly dispersed in the matrix. Optical microscopy and scanning electron microscopy revealed that the size of MCs decreased as alcoholysis and polymerization degree of PVA increased. Thermogravimetric analysis showed that the MCs prepared with the high polymerization or alcoholysis degree of PVA revealed outstanding thermal stability, and the initial decomposition temperature increased by approximately 100°C compared with IPDI. Furthermore, the self-healing performance of the two-component waterborne polyurethane (2K WPU) coating system containing MCs was investigated. The 2K WPU coatings with 9 wt% PVA/PU/PUA MCs exhibited excellent self-healing, mechanical properties, and corrosion resistance, and indicated a high potential for smart coating. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Synthesis of PVA solution - Synthesis of MCs - Preparation of self-healing 2K - WPU coatings - Characterization
- RESULTS AND DISCUSSION : Analysis and characterization of MCs - Self-healing performance of 2K WPU
- Table 1 : Thermal weight loss data of MCs and capsule shells
- Table 2 : Film performance of 2K WPU coatings loaded with different types of MCs
- Table 3 : Coating performance of 2K WPU with different MCs contentDOI : https://doi.org/10.1007/s11998-021-00577-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00577-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38091
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 977-988[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23605 - Périodique Bibliothèque principale Documentaires Disponible Preparation of a superhydrophobic coating on 6061Al alloy substrate and its simplified truncated cone model / Zhexin Lv in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
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Titre : Preparation of a superhydrophobic coating on 6061Al alloy substrate and its simplified truncated cone model Type de document : texte imprimé Auteurs : Zhexin Lv, Auteur ; Sirong Yu, Auteur ; Zhou Xue, Auteur ; Liu Di, Auteur ; Yangyan Liu, Auteur ; Yan Zhao, Auteur Année de publication : 2019 Article en page(s) : p. 933-948 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages
Anticorrosifs
Anticorrosion
Hydrophobie
Métaux -- Revêtements protecteurs
Produits chimiques -- Suppression ou remplacement
Traitement thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Superhydrophobic materials are known for their vast range of applications and properties. We present a simple process to fabricate a superhydrophobic coating on 6061Al alloy via a route with chemical replacement and heat treatment. Through this route, a hierarchical morphology including microparticles and leaf-like microstructures was obtained and, upon modification by stearic acid, the prepared coatings show good water repellency with a water contact angle of 159.2 ± 0.3° and sliding angle of 4.5 ± 1.5°. Systematic studies have been conducted on the coatings fabricated under different processing conditions to obtain the best experimental parameters, and demonstrate the reaction mechanism and the good self-cleaning effect. The 3D simulated coating topography was characterized by Leica DCM 3D in the mesoscopic scale. Based on the topography, the simplified ideal truncated cone model and theoretical equation were obtained. According to the model, a qualitative result was drawn: the higher and sharper the convex structures are, the better is the superhydrophobicity. Furthermore, the presented process can be applied to larger, stable coatings with the controllable wettability for diverse applications. Note de contenu : - EXPERIMENTAL DESIGN : Materials and reagents - Preparation for the superhydrophobic coating on 6061Al alloy substrate - Characterizations and tests
- RESULTS AND DISCUSSION : The as-prepared coating with the superhydrophobicity - Optimization of experimental parameters in chemical replacement - Composition and morphology of the superhydrophobic coating - The simplified truncated cone modelDOI : 10.1007/s11998-018-00168-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00168-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32851
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 933-948[article]Réservation
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