[article]
| Titre : |
Effect of ultrasonic treatment on stability of TiO2 dispersions |
| Type de document : |
texte imprimé |
| Auteurs : |
I. F. Kuz'kina, Auteur ; I. I. Ivankova, Auteur ; I. P. Zubov, Auteur ; Thadeus Schauer, Auteur ; M. Entenmann, Auteur ; C. D. Eisenbach, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 18-23 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The stability of aqueous dispersions of a rutile titanium dioxide pigment (TiO2) under ultrasonic treatment in the presence of such water-soluble polymers as poly(vinyl pyrrolidone), poly(vinyl alcohol), ethylhydroxy ethylcellulose was studied. Without polymers, the ultrasonic treatment of a dilute TiO2 aqueous dispersion results in a rapid complete reflocculation of the dispersion. In the presence of a given polymer, a stabilizing effect was observed, which depends on the nature of a polymer, its concentration and the duration of the ultrasonic treatment. It resulted in a reduction of a particle size and a more narrow particle size distribution. The TiO2 particles with preliminary surface treatment by oxides of Al, Si and Zr show higher dispersion stability in comparison with non-treated particles. |
| Note de contenu : |
- The experiment
- Ultrasonic treatment causes the formation of fresh surfaces
- Different degree of degradation of the polymers causes different behaviour in the ultrasonic field
- Polymer adsorption on the pigment surface and creation of a stabilizing layer
- Inorganic treatment of the pigment surface is conductive to particle stabilization with polymers |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11061 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 12/00 (12/2000) . - p. 18-23
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Effect of ultrasonic treatment on stability of TiO2 dispersions in EUROPEAN COATINGS JOURNAL (ECJ), N° 12/00 (12/2000)
