| Titre : |
Nano-titania as UV blockers in stains |
| Type de document : |
texte imprimé |
| Auteurs : |
Bernard Pacaud, Auteur ; Jean-Noël Bousseau, Auteur ; Jacques Lemaire, Auteur |
| Année de publication : |
1998 |
| Article en page(s) : |
p. 842-848 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Tags : |
'Matériau revêtement' Lasure Adjuvant 'Absorbant UV' 'Titane Oxyde' 'Particule ultrafine' TiO2 |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This article demonstrates that for the nano-TiO2 particles the authors have developed, stains can be loaded up to about 5% without significantly altering the transparency. This level is also sufficient to attain a good UV filter effect. For both alkyd and acrylic stains, at a level of 5% nano-TiO2 wood grays more slowly than with a UV absorber, and the products can be expected to last much longer.To describe resin degradation caused by the direct photochemical activity of the resin and by TiO2-induced photocatalysis, the authors have developed a simple model which is given in the appendix.
Once the various constants of the mathematical model had been determined, the model was tested to see how well it would predict the impact of the nano-TiO2 level, the photocatalytic activity of the nano-TiO2 and the properties of the resin. |
| Note de contenu : |
- Description of experimental techniques : Stain formulations - Preparation of fee film stains and coating of wood panels - Photocatalytic activity of nano-TiO2 - Spectrophotometric characterization - Ageing experiments - Measurement of film photo-oxidation rate
- Problems encountered with organic UV absorbers and search for a substitute : Degradation of organic UV-absorbers - Nano-TiO2 grades
- Assessment of application of nano-TiO2 in stains : Transparency and UV filter effect - Infrared monitoring of resin degradation - Monitoring by oxygen consumption - Change in color and aspect of wood during exposure of stain-coated wood panels to QUVA |
| En ligne : |
https://drive.google.com/file/d/14mEu_4pgmdMHnefA5Q8WmuQlDnJhKnSF/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11153 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11/98 (11/1998) . - p. 842-848
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