| Titre : |
Study on the effect of ultrasonication time on transport properties of polyurethane/organoclay nanocomposite coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Heidarian, Auteur ; M. R. Shishesaz, Auteur ; S. M. Kassiriha, Auteur ; M. Nematollahi, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 265-274 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Diffraction des rayons X Ã grand angle
Electrochimie
Matériaux hybrides
Revêtements:Peinture
Spectroscopie d'impédance électrochimique
Ultrasons
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In this study, a series of polyurethane (PU)/organically modified montmorillonite (OMMT) clay nanocomposites were synthesized by in situ polymerization technique through an ultrasonication-assisted process at various processing times. Wide angle X-ray diffraction (WAXD) was employed to investigate the effect of processing time on degree of delamination of clay platelets. In order to evaluate the effect of ultrasonication time on transport properties of the PU/OMMT composites, diffusion coefficient and maximum water uptake were determined through a water permeation test. Electrochemical impedance spectroscopy (EIS) was carried out to analyze the barrier properties and to evaluate the corrosion performance of these composite coatings on carbon steel panels. It was found that by increasing sonication time, the barrier property of nanocomposites against diffusion of water molecules was improved. This is due to further separation of clay platelets and enhancement of the traveling pathways for water molecules. |
| Note de contenu : |
EXPERIMENTAL
- Materials
- Nanocomposite preparation
- Structural characterization of nanocomposites
- Moisture permeation measurement
- Electrochemical measurement of water uptake
RESULTS AND DISCUSSION
- Dispersion of organoclay in castor oil
- X-ray diffraction analysis
- Water permeation
- Electrochemical impedance spectroscopy |
| DOI : |
10.1007/s11998-010-9297-7 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9297-7.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11417 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 2 (03/2011) . - p. 265-274
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