| Titre : |
Highly dispersive waterborne polyurethane/ZnO nanocomposites for corrosion protection |
| Type de document : |
texte imprimé |
| Auteurs : |
Manickam Anbu Kulandainathan, Auteur ; Gurusamy Harichandran, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 657-667 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Anticorrosion
Métaux -- Revêtements protecteurs
Nanoparticules
Oxyde de zinc
Polyuréthanes
Revêtements en phase aqueuse:Peinture en phase aqueuse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The interfacial interactions between surface-modified zinc oxide with oleic acid (OA-ZnO) and polymer matrix have important effects on the properties of nanocomposites. This zinc oxide nanoparticle was synthesized and characterized by various techniques such as field emission scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The water contact angle of waterborne polyurethane (WPU) nanocomposites is found to be increased with the addition of OA-ZnO compared with pure WPU. The corrosion protection of the polyurethane nanocomposites coatings on mild steel was assessed by potentiodynamic polarization and electrochemical impedance spectroscopy techniques. Coating with OA-ZnO in the WPU matrix showed the enhancement of resistance of mild steel to corrosion. This can be related to the surface modification by oleic acid which enhances the dispersion of nano-ZnO and improves the corrosion resistance of the WPU coating. Compared with unmodified ZnO nanoparticles, there were noticeable improvements in the hydrophobicity, corrosion protection, and uniform dispersion without agglomeration, and also improvement in the antisettling behavior when surface-modified ZnO nanoparticles with oleic acid (OA-ZnO) were used. |
| Note de contenu : |
MATERIALS AND METHODS : Raw materials - Synthesis of nano-ZnO and surface-modified nano-ZnO - Preparation of nanocomposite coatings - Characterization methods - Electrochemical impedance spectroscopy
- RESULTS AND DISCUSSION : Surface morphology of ZnO nanoparticles - Microstructure analysis - XRD patterns - Fourier transform infrared (FTIR) spectra - Contact angle measurements - Nanoparticle polymer dispersion - Lipophilic degree of OA-ZnO - Electrochemical corrosion studies |
| DOI : |
10.1007/s11998-015-9674-3 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9674-3.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24401 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 657-667
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