| Titre : |
Effects of adding TiO2 nanoparticles to a water-based varnish for wood applied to nine tropical woods of Costa Rica exposed to natural and accelerated weathering |
| Type de document : |
texte imprimé |
| Auteurs : |
Róger Moya, Auteur ; Ana RodrÃguez-Zúñiga, Auteur ; José Vega-Baudrit, Auteur ; Allen Puente-Urbina, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 141-152 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Bois -- Finition
Bois -- Revêtements protecteurs
Caractérisation
Diffractométrie de rayons X
Dioxyde de titane
Essais d'adhésion
Humidité -- Absorption:Eau -- Absorption
Nanoparticules
Nanotechnologie
Protection contre le rayonnement ultraviolet
Statistique
Traîtements de surface
Vernis en phase aqueuse
vision des couleurs
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The addition of titanium dioxide nanoparticles (TiO2 nanoparticles) to a water-based varnish used for finishing tropical woods was studied. Three different concentrations of TiO2 nanoparticles (0%, 1.0%, and 1.5%) were evaluated. The nanoparticles were characterized by means of the transmission electron microscopy and an X-ray diffractometer. The varnish prepared was evaluated for its viscosity, adhesion of the film to the wood, water absorption, and the effects of natural weathering on the color and quality of the varnish. It was found that viscosity decreases as the concentration of TiO2 nanoparticles increases, while no variation was found in the thickness of the film. Except for Gmelina arborea and Tectona grandis, the adhesion was not statistically affected. It was found that, in the 9 species tested, incorporation of TiO2 nanoparticles decreased the values of water absorption. The evaluation of natural weathering showed that the varnish with no added TiO2 nanoparticles degraded completely after 1 year of weathering exposure, while the modified varnish film endured. Less color change was observed in lumber treated with the varnish containing TiO2 nanoparticles. The best performance of the varnish in the nine tropical woods used was observed when TiO2 nanoparticles were added at 1.5% concentration. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Preparation of the coating with TiO2 nanoparticles - Characterization of the varnish - Wood species, surface preparation, and application of coating - Dry film thickness, adhesion test, and water absorption - UV protection determination - Wood color evaluation - Statistical anaysis
- RESULTS AND DISCUSSION : Characterization of the coating - Water absorption - UV protection determination - Color change |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9848-7.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27796 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 141-152
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Effects of adding TiO2 nanoparticles to a water-based varnish for wood applied to nine tropical woods of Costa Rica exposed to natural and accelerated weathering in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
