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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)
[article]
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 Recent progress of self-healing coatings for magnesium alloys protection / N. A. Johari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
[article]
Titre : Recent progress of self-healing coatings for magnesium alloys protection Type de document : texte imprimé Auteurs : N. A. Johari, Auteur ; J. Alias, Auteur ; A. Zanurin, Auteur ; N. S. Mohamed, Auteur ; N. A. Alang, Auteur ; M. Z. M. Zain, Auteur Année de publication : 2022 Article en page(s) : p. 757-774 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Hydrophobie
Hydroxydes doubles lamellaires
Magnésium -- Alliages
Métaux -- Revêtements protecteurs
Nanotechnologie
Polymères
Revêtement autoréparant
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : As the lightest structural metal and having a natural ionic presence with compatible biological systems, magnesium (Mg) has been emphasized in vehicle fuel economy for the automobile industry and is appropriate for biodegradable implants. However, the reactive nature of Mg makes it susceptible to corrosion. The electrochemical instability of Mg is due to long-term hydrogen gas evolution, microgalvanic reaction between the matrix and second phase, presence of impurities, and formation of non-protective corrosion product. Many studies have been done to protect Mg and its alloys from corrosion, and one way to prevent direct contact between magnesium substrate and corrosive medium is by applying a stable coating. Protective coating with self-healing properties has become an efficient technique to improve the corrosion resistance of Mg alloys. A self-healing coating can contain released ion exchange of corrosion inhibitors that could improve the coating stability significantly, while coating with embedded nanocontainers is able to autonomously self-heal via stimulus controlled-release upon crack and damages. In this review, recent studies on functional coating with self-healing ability including layered double hydroxides, cerium conversion coating, plasma electrolytic oxidation, graphene oxide coating, and smart self-healing coating are highlighted in the first section. The nanocontainers containing inhibitor coating and self-healing coating with superhydrophobic and biocompatibility function are reviewed afterward. Note de contenu : - FUNCTIONAL COATING WITH SELF-HEALING ABILITY : Layered double hydroxides (LDHs) coating - Cerium conversion coating - Plasma electrolytic oxidation (PEO) - Hybrid PEO-composite coating - Graphene oxide-coating
- NANOCONTAINERS CONTAINING INHIBITORS : Mesoporous nanocontainers - Zeolites - Montmorillonite (MMT) clay - Halloysite nanotubes (HNTs)
- SELF-HEALING COATING WITH A PARTICULAR PURPOSE : Superhydrophobic/Superamphiphobic coating - Biocompatible self-healing coating
- Table 1 : Research development of superhydrophobic coating for Mg alloys and their performanceDOI : https://doi.org/10.1007/s11998-021-599-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00599-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38070
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 757-774[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23605 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : A review of different smart coatings Type de document : texte imprimé Auteurs : Mohit Katiyar, Auteur ; Durgesh K. Soni, Auteur ; Arun Maithani, Auteur Année de publication : 2021 Article en page(s) : p. 70-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Conducteurs organiques
Matériaux intelligents
Nanoparticules
Peinture solaire
Pigments
Propriétés anti-empreintes
Revêtement antireflet
Revêtement auto-nettoyant
Revêtement autoréparant
Revêtement conducteur
Revêtements antisalissures
Revêtements organiques
ThermochromieIndex. décimale : 667.9 Revêtements et enduits Résumé : Today's coatings are becoming smarter day by day. They hold answers to some of unmet demands in different markets like automotive, industrial, marine, aerospace etc. And, it's really well sustained by intense growth of smart additives and new preparation methods. Smart Coatings are coatings, but with predefined properties and special films, which make them sense and respond to environment and other externat stimuli. Smart coatings are made of programmable materials with a variety of physical, chemical, electrical and mechanical properties. These materials can changes in light, pressure, chemical, heat along with other stimuli. Several smart coating systems have already been developed and examined, as a result they are currently under investigation by numerous laboratories and industries across the world. Examples of smart coatings include stimuli responsive, antimicrobial, antifouling, conductive, self-healing, and super hydrophobic systems. Note de contenu : - Self-cleaning coating
- Anti-reflection coating
- Anti-fouling coating
- Anti-corrosive coating
- Thermochromic coatings
- Anti-fingerprint coating
- Self-healing paint : Autonomous healing mechanisms-based on corrosion inhibitors - Non-autonomous healing mechanisms-based on dynamic bonds
- Electrical conductive paint
- Solar paint
- Fig. 1 : Surface of a lotus leaf has a hierarchically rough structure
- Fig. 2 : Liquid dros and uneven surface of lotus leaf
- Fig. 3 : Scanning electron micrograph of lotus leaf. Schematic depicting the relationship between surface roughness and self-cleaning
- Fig. 4 : Reflection and transmission of light rays
- Fig. 5 : Examples of heavily fouled hulls
- Fig. 6 : A multilayer structure of thermochromic coating
- Fig. 7 : The coating becomes white, when is temperature reaches above the criticle temperature
- Fig. 8 : DA reaction of TFAT ; SEM image of the coating showing thermally activated self-healing behaviorEn ligne : https://drive.google.com/file/d/1osla2mOTQvfZ2PXhAIsA5sm_j-7t_fZu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36465
in PAINTINDIA > Vol. LXXI, N° 8 (08/2021) . - p. 70-80[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22922 - Périodique Bibliothèque principale Documentaires Disponible Salt-controlled self-healing nanogel composite embedded with epoxy as environmentally friendly organic coating / Ayman M. Atta in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Salt-controlled self-healing nanogel composite embedded with epoxy as environmentally friendly organic coating Type de document : texte imprimé Auteurs : Ayman M. Atta, Auteur ; Hamad A. Al-Lohedan, Auteur ; Ashraf M. El-Saeed, Auteur ; Hussin I. Al-Shafey, Auteur ; Mohamed Wahby, Auteur Année de publication : 2017 Article en page(s) : p. 1225-1236 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
Colloides
Essais de brouillard salin
Métaux -- Revêtements protecteurs
Montmorillonite
Nanotechnologie
Revêtement autoréparant
Revêtements -- Propriétés mécaniques
SodiumLe sodium est un élément chimique, de symbole Na et de numéro atomique 11. C'est un métal mou et argenté, qui appartient aux métaux alcalins. On ne le trouve pas à l'état de corps pur dans la nature, mais il est très abondant sous forme de composés, par exemple dans le sel. Il brûle avec une flamme jaune.
Le sodium possède 22 isotopes connus, avec un nombre de masse variant entre 18 et 37.Index. décimale : 667.9 Revêtements et enduits Résumé : Smart nanogel capsules are attracting great attention to act as self-healing materials for polymers and epoxy coating and as anticorrosion materials. The present work aimed at incorporating nanogel among silicate layers of sodium montmorillonite (Na-MMT) to increase its dispersibility into an epoxy matrix so as to be used as self-healing nanocomposites. For this purpose, N-isopropyl acrylamide (NIPAm) as a salt-sensitive monomer was selected to prepare smart nanogels to disperse the Na-MMT layers. The chemical structure, surface morphology, particle size distribution, surface charge, and degree of exfoliation of Na-MMT with NIPAm nanogel were investigated. The ability of Na-MMT/NIPAm to modify the mechanical, surface, and self-healing characteristics of epoxy matrix was studied. The corrosion inhibition and self-healing mechanism were discussed in light of salt spray resistance of epoxy nanocomposites to protect steel from corrosive environments. Note de contenu : - EXPERIMENTAL : Materials - Preparation of epoxy/Na-MMT nanogel composite - Characterization - Mechanical and salt spray resistance of coated epoxy nanocomposite films
- RESULTS AND DISCUSSION : Mechanical properties of Na-MMT/NIPAm epoxy nanocomposite coats - Salt spray corrosion resistance of epoxy/Na-MMT/NIPAm nanocomposite coatingsDOI : 10.1007/s11998-017-9917-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9917-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29155
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Self-healing and corrosion performance of polyurethane coating containing polyurethane microcapsules / Hanieh Fathi Fathabadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
[article]
Titre : Self-healing and corrosion performance of polyurethane coating containing polyurethane microcapsules Type de document : texte imprimé Auteurs : Hanieh Fathi Fathabadi, Auteur ; Mehdi Javidi, Auteur Année de publication : 2021 Article en page(s) : p. 1365-1378 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Caractérisation
Encapsulation
Essais d'adhésion
Microcapsules
Polymérisation interfaciale
Polyuréthanes
Revêtement autoréparant
Revêtements organiques
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, the self-healing behavior of the polyurethane coating containing polyurethane microcapsules was investigated. Microcapsules, with the average size of 99 µm and shell thickness of 11 µm, were successfully synthesized via the interfacial polymerization technique and were incorporated into the polyurethane coating matrix. The electrochemical impedance spectroscopy and scanning electron microscope were employed to investigate the healing performance and corrosion behavior of the coatings on the carbon steel substrate. The recorded results revealed that artificial scratches were successfully healed and the coating containing 20 wt% microcapsules exhibited the best healing performance (85% healing efficiency) among all the prepared coatings. The self-healing ability of the coatings was verified via scanning electron microscope. After 24 h, the healing efficiency attained a reasonable value of 68% during exposure to test solution. It was found that corrosion resistance and coating adhesion were significantly improved by incorporating the microcapsules into the coating. Note de contenu : - EXPERIMENTAL : Materials - Preparation of microcapsules - SEM investigation - Coatings application - Evaluation of self-healing behavior of the coatings and corrosion performance - Adhesion test
- RESULTS AND DISCUSSION : Characterization of the synthesized microcapsules - Self-healing performance of the coatings - The effect of microcapsule concentration on healing process - Time dependency of the healing process - Corrosion performance of the investigated coating - Adhesion test
- Table 1 : Prepared and coded samples
- Table 2 : The resulted electrochemical data after curve fitting the impedance results for carbon steel samples coated with polyurethane resin containing different concentrations of polyurethane microcapsules in 3.5% NaCl electrolyte
- Table 3 : The resulted electrochemical data after curve fitting the impedance results for the carbon steel samples coated with polyurethane resin containing 20 wt% polyurethane microcapsules and the neat coating without any scratches in 3.5% NaCl electrolyte
- Table 4 The resulted electrochemical data after curve fitting the impedance data for the carbon steel coated with polyurethane resin containing 20 wt% polyurethane microcapsules in 3.5% NaCl electrolyte at different time intervals
- Table 5 The extracted electrochemical data from EIS measurements to evaluate the corrosion performance of the carbon steel coated with polyurethane resin containing 20 wt% polyurethane microcapsules in 3.5% NaCl electrolyte at different time intervalsDOI : https://doi.org/10.1007/s11998-021-00501-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00501-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36439
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Code-barres Cote Support Localisation Section Disponibilité 22991 - Périodique Bibliothèque principale Documentaires Disponible Self-healing hybrid coating of phytic acid/silane for improving the corrosion resistance of magnesium alloy / Yan Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)
PermalinkSelf-healing in polymer coatings & composites : approaches and recent advancements / Sagar Pangam in PAINTINDIA, Vol. LXIV, N° 9 (09/2014)
PermalinkSelf-healing materials technology : a vehicle for coating life extension / Clifford K. Schoff in COATINGS TECH, Vol. 9, N° 11 (12/2012)
PermalinkSelf-healing metal oxides could protect against corrosion / David Chandler in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4641 (05/2018)
PermalinkSelf-healing primers extend protection / Subramanyam V. Kasisomayajula in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2018)
PermalinkShort cycle times and high productivity for smart components / Christoph Bontenackels in KUNSTSTOFFE INTERNATIONAL, Vol. 111, N° 7 (2021)
PermalinkStimuli-responsive polyurethane-urea polymer for protective coatings and dampening material / Anastassija Wittmer in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)
PermalinkSustainable microcapsules for self-healing and corrosion protection in powder coatings / Vimal Saimi in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4661 (05/2020)
PermalinkSynthesis 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)
PermalinkThe 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)
PermalinkUV-curable alkyd coating with self-healing ability / Saman Nornadila Mohd in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
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