| Titre : |
UV-waterborne polyurethane-acrylate nanocomposite coatings containing alumina and silica nanoparticles for wood : mechanical, optical, and thermal properties assessment |
| Type de document : |
texte imprimé |
| Auteurs : |
Caroline Sow, Auteur ; Bernard Riedl, Auteur ; Pierre Blanchet, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 211-221 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Alumine
Bois -- Revêtements
Matériaux hybrides
Nanoparticules
Polyacrylates
Polyuréthanes
Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet:Peinture en phase aqueuse -- Séchage sous rayonnement ultraviolet
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The effect of alumina and silica nanoparticles on mechanical, optical, and thermal properties of UV-waterborne nanocomposite coatings was investigated. The addition of nanoalumina and nanosilica was shown to decrease the hardness because of nanoparticle aggregation. In comparison to the neat coating and despite the presence of aggregates, the scratch resistance of nanocomposite coatings was significantly improved. As expected, the gloss of UV-waterborne coatings was reduced following the addition of nanoparticles due to an increase of the surface roughness. Alumina and silica nanoparticles were found to enhance the glass transition temperature of PUA nanocomposite coatings by hindering the mobility of macromolecular chains at the interface around the nanoparticles. Finally, the interest and efficiency of grafting trialkoxysilanes was demonstrated with the study of nanosilica behavior. Not only was the dispersion of nanosilica enhanced following trialkoxysilanes grafting onto silica nanoparticles, but also the scratch resistance and the adhesion of UV-waterborne coatings containing nanosilica markedly increased even with 1 wt% content. Silica which is recommended in the wooden furniture and kitchen cabinet manufacturing industry as nano-reinforcement provides improved properties well suited in surface coating applications to efficiently protect surface of wood substrates. |
| Note de contenu : |
- EXPERIMENTAL : Material - Preparation of UV-waterborne nanocomposite coatings - Characterization of UV-waterborne nanocomposite films (transmission electron microscopy - mechanical properties - optical properties - Thermal properties.
- RESULTS AND DISCUSSION : Characterization of surface modified nanosilica powder - Morphology of UV-waterborne nanocomposite coatings (UV-curing proces of UV-waterborne coating formulations - Dispersion of nanoparticles in UV-waterborne coatings) - Effect of nanoparticle content on mechanical properties of UV-waterborne coatings (scratch resistance - Adhesion) - effect of nanoparticle content on appearance properties of UV-waterborne coatings - Effect of nanoparticle content on thermal properties of UV-waterborne coatings. |
| DOI : |
10.1007/s11998-010-9298-6 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9298-6.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11367 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 2 (03/2011) . - p. 211-221
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