| Titre : |
Gel-sol synthesis of surface-treated TiO2 nanoparticles and incorporation with waterborne acrylic resin systems for clear UV protective coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Changfeng Chen, Auteur ; Yuliang Wang, Auteur ; Guiquan Pan, Auteur ; Qingwu Wang, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 785-791 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Dioxyde de titane
Nanoparticules
Polyacryliques
Protection contre le rayonnement ultraviolet
Revêtements en phase aqueuse:Peinture en phase aqueuse
Sol-gel, Procédé
Toiture -- Revêtements:Toiture -- Peinture
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Visible transparent UV protective coatings were developed by incorporating nano-TiO2 into waterborne acrylic systems to provide UV protection for UV-sensitive color cool roofing. Water-based high crystalline TiO2 nanoparticle suspension was prepared via a gel-sol method at a basic pH. The TiO2 nanoparticles have an average size of 20 nm and are stable against agglomeration. As-prepared TiO2 nanosuspension is ready to be well dispersed in commercial waterborne acrylic resin system without extra-surface modification. The fabricated TiO2/acrylic nanocomposite coating achieved a UV cut-off below 350 nm with a visible transmission greater than 85% at 700 nm. It is also demonstrated by using Rhodamine 6G that surface modification of nano-TiO2 with a SiO2 insulation layer would suppress the catalytic activity of nano-TiO2 and improve the UV protection for UV and photocatalysis sensitive dyes. |
| Note de contenu : |
- MATERIALS AND METHODS : 1. Synthesis of TiO2 and SiO2-TiO2 nanoparticles - 2. Preparation of TiO2/resin and SiO2-TiO2/resin coatings - 3. Characterization - 4. UV test of TiO2 and SiO2-TiO2 photocatalyst on resin matrix
- RESULTS AND DISCUSSION : 1. Surface morphology of TiO2 nanoparticles and SiO2-TiO2 nanoparticles - 2. Effect of pH on the formulation of UV protective coating solution - 3. Surface morphology of the TiO2/acrylic coating - 4. Transparent UV absorbing TiO2/PVDF/acrylic films - 5. UV test of TiO2 and SiO2-TiO2 photocatalyst on resin matrix |
| DOI : |
10.1007/s11998-014-9583-x |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9583-x.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22061 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 5 (09/2014) . - p. 785-791
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