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Superhydrophobic surfaces for corrosion protection : a review of recent progresses and future directions / Dawei Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)
[article]
Titre : Superhydrophobic surfaces for corrosion protection : a review of recent progresses and future directions : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9744-6.pdf Type de document : texte imprimé Auteurs : Dawei Zhang, Auteur ; Luntao Wang, Auteur ; Hongchang Qian, Auteur ; Xiaogang Li, Auteur Année de publication : 2016 Article en page(s) : p. 11-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Hydrophobie
Microstructures
Mouillage (chimie des surfaces)
Revêtement autoréparant:Peinture autoréparanteIndex. décimale : 667.9 Revêtements et enduits Résumé : Due to their superior water-repelling effects, superhydrophobic surfaces have received increasing attention as a promising solution to corrosion of metallic materials. The present article introduces the fundamental theories behind superhydrophobicity followed by a comprehensive review of the recent progresses of this rapidly growing field over the past 5 years. A critical discussion over anticorrosion mechanisms of superhydrophobic surfaces is also provided. For many realistic applications, future efforts are pressingly demanded to prolong the corrosion resistance of these superhydrophobic surfaces. To this end, several important strategies and examples in designing stable, self-healable, or inhibitor-loaded superhydrophobic surfaces are discussed. Note de contenu : - THE THEORY OF SUPERHYDROPHOBIC SURFACES : Wettability of a smooth surface - Wettability of a rough surface
- APPLICATION OF SUPERHYDROPHOBIC SURFACES FOR CORROSION PROTECTION : Etching - Wet chemical reaction - Hydrothermal method - Anodization - Electrodeposition - Sol-gel method - Nanocomposite coatings - Templating - Mechanistic aspects
- FUTURE TRENDS IN DEVELOPMENT OF SUPERHYDROPHOBIC SURFACES WITH LONG-LASTING CORROSION RESISTANCE : Improving the stability of superhydrophobic surfaces - Self-healing capability of superhydrophobic surfaces - Inhibitor-containing superhydrophobic coatingsDOI : 10.1007/s11998-015-9744-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9744-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25368
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 11-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17819 - Périodique Bibliothèque principale Documentaires Disponible Sustainable microcapsules for self-healing and corrosion protection in powder coatings / Vimal Saimi in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4661 (05/2020)
[article]
Titre : Sustainable microcapsules for self-healing and corrosion protection in powder coatings Type de document : texte imprimé Auteurs : Vimal Saimi, Auteur Année de publication : 2020 Article en page(s) : p. 44-47 Note générale : Bibliogr. Langues : Anglais (eng) 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.
Anticorrosifs
Anticorrosion
Caractérisation
Copolymère mélamine-Formaldéhyde
Eau salée
Encapsulation
Huile de linL'huile de lin ou "huile de graines de lin" est une huile de couleur jaune d'or, tirée des graines mûres du lin cultivé, pressées à froid et/ou à chaud ; parfois elle est extraite par un solvant, en vue de l'usage industriel ou artistique, principalement comme siccatif, ou huile auto-siccative.
Les utilisations de l'huile de lin dérivent de sa richesse en acides gras polyinsaturés, en particulier en acides linolénique et linoléique, qui lui doivent leur nom.
L'huile de lin polymérise spontanément à l'air, avec une réaction exothermique : un chiffon imbibé d'huile peut ainsi, dans certaines conditions, s'enflammer spontanément.
Pour ses propriétés de polymère, l'huile de lin est employée seule, ou mélangée à d'autres huiles, résines et solvants, et est utilisée en tant que : Imprégnateur et protecteur des bois à l'intérieur comme à l'extérieur : protection contre l'humidité, les champignons et insectes, et contre la poussière par son caractère antistatique, composant de certains vernis de finition, liant de broyage pour la peinture à l'huile, agent plastifiant du mastic de vitrier, agent durcisseur de diverses préparations, agent de cohérence et liant dans la fabrication du linoléum.
Métaux -- Revêtements protecteurs
Microcapsules
Pulvérisation électrostatique
Revêtement autoréparant
Revêtements poudre
Stabilité thermique
Test d'immersion
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, a self-healing powder coating based on micro-encapsulated linseed oil is reported. Linseed oil was chosen as the self-healing agent for its excellent film forming capability and Poly (melamine formaldehyde) (PMF) was chosen as a shell material. Microcapsules were synthesised by in-situ polymerisation. A powder coating based on thermoplastic powder was used. Microcapsules were mixed with the powder coating and sprayed electrostatically on the cold rolled steel. The thermal stability of microcapsules was evaluated with TGA. The corrosion evaluation of the coating was done with the electrochemical impedance spectroscopy (FIS) and salt water immersion tests. The experimental results have demonstrated a strong inhibition of corrosion in the micro-encapsulated system. Furthermore, impedance measurements has shown an increase of impedance modulus of the micro-encapsulated system during immersion in the corrosive medium, which is reiated to the suppression of active corrosion activities and healing of the scratched areas. Healing of the coating was also demonstrated by optical microscopy. This study successfully demonstrated the self-healing activity of micro-encapsulated linseed oil in protecting steel surfaces against corrosion in powder coatings. Note de contenu : - EXPERIMENT : Materials - Synthesis of microcapsules - Characterisation of microcapsules - Preparation of samples - Characterisation of coated samples Electrochemical Impedance Spectroscopy (EIS) - Salt water immersion tests
- RESULTS AND DISCUSSIONS : Thermal stability of microcapsules - SEM morphology of microcapsules - electrochemical impedance spectroscopy
- Fig. 1 : Synthesis process of the microcapsules prepared by the in-situ polymerisation method
- Fig. 2 : FTIR spectra of linseed oit (L0), MF shetland microcapsules
- Fig. 3 : TGA curve of LO, microcapsules, MF sheti
- Fig. 4 : TGA isothermal curves of microcapsutes ptotted versus the temperature profile (25 to 200°C at 10°C min-'), held at 160°C for 10min
- Fig. 5 : SEM morphology of microcapsutes (a) after synthesis (b) held at 160°C for 10min (c) shell thickness
- Fig. 6 : (a) Distribution of microcapsules in the powder coating (b) close up of microcapsules (C) microcapsutes heated
- Fig. 7 : Bode magnitude plots of the immersed powder coating semples in 3.5% NaCl solution aqueous solution at different exposure times
- Fig. 8 : Salt immersion test after 168hr of exposure (ai blank (b] coating with microcapsulesEn ligne : https://drive.google.com/file/d/1Z4y4aYX3v60E6AgFENVOlmDYor8O13pv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34251
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4661 (05/2020) . - p. 44-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21744 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and property of room-temperature self-healable cathodic electrophoretic deposition coatings based on cationic waterborne polyurethane / Yingyu Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : Synthesis and property of room-temperature self-healable cathodic electrophoretic deposition coatings based on cationic waterborne polyurethane Type de document : texte imprimé Auteurs : Yingyu Li, Auteur ; Jingwei He, Auteur ; Hongfeng Luo, Auteur ; Xiaoling He, Auteur ; Fang Liu, Auteur Année de publication : 2022 Article en page(s) : p. 1621-1633 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt électrophorétique
Polymères -- Synthèse
Polymères en émulsion
Polyuréthanes
Revêtement autoréparant
Revêtements -- Propriétés thermiques
Revêtements en phase aqueuse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Cathodic electrophoretic deposition (CED) coatings are inevitably scratched following their application in processes such as automotive finishing. Self-healing coatings possess the ability to repair micro-scale damage, thereby extending their service life and reducing maintenance costs. Here, a novel strategy was developed to synthesize room-temperature intrinsic self-healing CED coatings by inserting 2-aminophenyl disulfide (APDS) into the polymer chain of cationic waterborne polyurethane (CWPU). Emulsion films incorporating the disulfide (SCWPU) could self-heal at room temperature via dynamic disulfide bond exchange and hydrogen bonding interactions, and their structures were confirmed by FTIR and Raman spectroscopy. The thermal properties of the SCWPU films were determined by differential scanning calorimetry and thermal gravimetric analysis. The effects of APDS incorporation and hard segment content (HSC) on the self-healing ability, mechanical and emulsion properties of the SCWPU films were systematically investigated. The results showed that the self-healing abilities of SCWPU film were 97.2% at RT over 24 h and 96.5% at 37°C (body temperature) after 4 h. CED coatings (8 μm, 3H pencil hardness) prepared from SCWPU emulsion also displayed self-healing properties at room temperature. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of cationic waterborne polyurethanes with disulfide bond (SCWPU) - Preparation of SCWPU films - Characterization of SCWPU - Self-healing performance - Preparation of films of cathodic electrodeposition (CED) coatings
- RESULTS AND DISCUSSION : FTIR and Raman spectra analysis - Thermal properties - Self-healing properties - Properties of the waterborne CED coatings
- Table 1 : Composition of Sxa-CWPU samples (mol ratio)
- Table 2 : Composition of SCWPU/HSCa samples (mol ratio)
- Table 3 : Properties of the CED film coatings and SCWPU emulsionsDOI : https://doi.org/10.1007/s11998-022-00634-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00634-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38294
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible The polyaniline-modified TiO2 composites in water-based epoxy coating for corrosion protection of Q235 steel / Xuehui Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)
[article]
Titre : The polyaniline-modified TiO2 composites in water-based epoxy coating for corrosion protection of Q235 steel Type de document : texte imprimé Auteurs : Xuehui Liu, Auteur ; Peimin Hou, Auteur ; Xia Zhao, Auteur ; Xiumin Ma, Auteur ; Baorong Hou, Auteur Année de publication : 2019 Article en page(s) : p. 71-80 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier -- Conservation
Anticorrosifs
Anticorrosion
Chimie analytique
Dioxyde de titane
Epoxydes
Métaux -- Revêtements protecteurs
Polyacrylonitrile
Revêtement autoréparant
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The development of active systems to protect metal substrates against corrosion is a promising approach for many industrial applications. In this work, a self-healing coating based on TiO2 particles modified with polyaniline (PANI) was prepared for corrosion protection of Q235 steel. TiO2/PANI particles were synthesized by in situ polymerization and dispersed into a water-based epoxy coating. The structure and morphology of as-prepared TiO2/PANI particles were characterized by FTIR, XRD, and SEM. The anticorrosion performance of the coating was studied by electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM). EIS analysis showed improved corrosion protection properties in the presence of TiO2/PNAI particles. SECM measurements were performed to monitor the reduction of oxygen process as a function of exposure time in 3.5% NaCl solution. SECM results showed that the epoxy coating with TiO2/PANI particles had a superior corrosion protection relative to the blank coating after artificial defect exposure to the corrosive environment. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of TiO2 particles - Preparation of TiO2/PANI particles - Preparation of water-based epoxy coatings - Characterization
- RESULTS AND DISCUSSION : Characterization of TiO2 particles - Surface properties of the coatings - Evaluation of anticorrosion performanceDOI : 10.1007/s11998-018-0101-4 En ligne : https://link.springer.com/article/10.1007/s11998-018-0101-4 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31966
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Code-barres Cote Support Localisation Section Disponibilité 20659 - Périodique Bibliothèque principale Documentaires Disponible UV-curable alkyd coating with self-healing ability / Saman Nornadila Mohd in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
[article]
Titre : UV-curable alkyd coating with self-healing ability Type de document : texte imprimé Auteurs : Saman Nornadila Mohd, Auteur ; Desmond Teck-Chye Ang, Auteur ; Nurshafiza Shahabudin, Auteur ; Seng Neon Gan, Auteur ; Wan Jefrey Basirun, Auteur Année de publication : 2019 Article en page(s) : p. 465-476 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Caractérisation
Encapsulation
Huile de palme et constituants
Pentaérythritol tétrakis
Polyalkydes
Polymères -- Synthèse
Revêtement autoréparant
Revêtements -- Séchage sous rayonnement ultraviolet
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-curable palm oil-based alkyd coating is a form of environmentally friendly coating that utilizes vegetable oil as one of its main raw materials. Similar to any other coatings, UV-cured alkyd coating is susceptible to damages such as formation of microcracks during its service. Early diagnosis and repair of the damage are important to avoid further catastrophic failure and damage to the substrate. Self-healing ability in coating is therefore a desirable quality and has gained popularity in the industry as it can prolong the lifetime of the coating, as well as the substrate. The aim of this study is to produce UV-curable alkyd coating with self-healing ability. The coating is a form of environmentally friendly self-healing coating owing to its UV curing ability and also due to the fact that the binder is produced using a significant amount of a renewable resource, palm oil. The self-healing alkyd coating is comprised of microcapsules containing healing agent, embedded into alkyd coating matrix. Diglycidyl ether bisphenol-A-based epoxy (EPON828) and pentaerythritol tetrakis (3-mercaptopropionate) were chosen as the healing agents in this work due to their compatibility with the matrix. Self-healing process of the coating takes place within 10 min after the coating was intentionally damaged. The efficacy of the self-healing ability of the coating was investigated using electrochemical impedance spectroscopy measurement. Note de contenu : - EXPERIMENTAL : Materials - Microencapsulation of EPON828 and pentaerythritol tetrakis, PETMP - Analysis of microcapsule size and morphology - Core content characterization - Thermal anlaysis of microcapsule - Alkyd synthesis - Preparation of coating mixture - Coating film properties - Corrosion study
- RESULTS AND DISCUSSION : Microcapsule size and morphology - Core content analysis - Thermal analysis of microcapsules - Characterization of alkyd - Coating film properties - EIS measurementDOI : 10.1007/s11998-018-0124-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0124-x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32417
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