[article]
| Titre : |
Preparation of active-passive anticorrosion antistatic epoxy nanocomposite coatings loaded with CeO2, CeO2@C, and CHS particles |
| Type de document : |
texte imprimé |
| Auteurs : |
Sara Sabzavar, Auteur ; Mehdi Ghahari, Auteur ; Mehran Rostami, Auteur ; Morteza Ganjaee Sari, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 1263-1279 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Anticorrosifs
Anticorrosion
Antistatiques
Caractérisation
Carbone
Corps creux
Epoxydes
Matériaux hybrides
Microsphères
Nanoparticules -- Synthèse
Oxyde de cériumL'oxyde de cérium(IV) également appelé dioxyde de cérium, oxyde de cérium ou historiquement ceria, est l'un des oxydes du cérium, de formule CeO2.
Il se présente, dans les conditions normales de température et de pression (CNTP) sous la forme d'un solide jaune pâle, légèrement hygroscopique et capable d'absorber de petites quantités de dioxyde de carbone atmosphérique.
Cet oxyde de cérium peut être formé par calcination de l'oxalate de cérium ou de l'hydroxyde de cérium.
Le cérium forme aussi un autre oxyde, l'oxyde de cérium(III), de formule Ce2O3, qui est instable et s'oxyde en oxyde de cérium(IV) aux CNTP. (Wikipedia)
Polyvinylpyrrolidone
Revêtements organiques
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In this study, active-passive anticorrosion antistatic epoxy composite coatings containing CeO2, carbon coated ceria (CeO2@C), and carbon hollow sphere particles were prepared. Cerium oxide (CeO2) particles were synthesized through a hydrothermal approach in the presence of polyvinylpyrrolidone as a surfactant to achieve a uniform and semispherical morphology and to improve dispersion stability. Carbon hollow spheres (CHSs) were also fabricated using the surface-modified silica templating method. The structure and morphology of the synthesized particles were analyzed using Fourier transform infrared spectrometry, X-ray diffractometry, Raman spectrometry, and scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM-EDS). Furthermore, migration of the synthesized particles from the bulk toward the surface was investigated with atomic force microscopy, Raman spectra, and field emission SEM in addition to density, capillary wetting, contact angle, and zeta potential measurements. The results indicated that CHSs migrate toward the surface of the matrix due to its low interfacial tensions leading to a decline in the dielectric constant and electrical resistance, providing a composite with suitable antistatic properties. Moreover, electrochemical impedance spectroscopy and immersion testing were used to estimate the influence of the particles on the coating's anticorrosive property. The results showed that the impedance modulus at low frequency (|Z|0.01 Hz) significantly increased from 3.81 × 106 Ω cm2 (pristine epoxy) to 11 × 108 Ω cm2 after 40 days of immersion in 3.5% NaCl water solution. As a result of the synergistic protection provided by ceria, CHS, and CeO2@C particles, composite coatings exhibit superior anticorrosion properties. The ceria particles have an inhibitory effect which forms a passive layer. Furthermore, the CHS and CeO2@C particles produce a protective barrier prolonging the penetration pathway of corrosive media. Such significant improvements can provide an antistatic coating for designing novel corrosion protection coatings. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Hydrothermal synthesis of CeO2 particles - Encapsulation of corrosion inhibitors - Synthesis of carbon hollow spheres - Preparation of coatings - Characterization techniques
- RESULTS AND DISCUSSION : Characterization of the synthesized nanoparticles - Investigation of migration of the nanoparticles in the coatings - Zeta potential - Raman spectrometry - Atomic force microscopy (AFM) - Contact angle measurement - FESEM microscopic images - Corrosion studies - Antistatic properties of coatings |
| DOI : |
https://doi.org/10.1007/s11998-023-00890-4 |
| En ligne : |
https://drive.google.com/file/d/1X435yvjEaQ9Dy8IN3dQKwIsHMDvs-24E/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41296 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 4 (07/2024) . - p. 1263-1279
[article]
|
Aller sur edunet
Accueil
Preparation of active-passive anticorrosion antistatic epoxy nanocomposite coatings loaded with CeO2, CeO2@C, and CHS particles in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 4 (07/2024)
