Influence of dewetting kinetics on bubble-particle interaction

Nguyen, AV and Stechemesser, H (2004) Influence of dewetting kinetics on bubble-particle interaction. Physical Chemistry Chemical Physics, 6 2: 429-433. doi:10.1039/b312073b


Author Nguyen, AV
Stechemesser, H
Title Influence of dewetting kinetics on bubble-particle interaction
Journal name Physical Chemistry Chemical Physics   Check publisher's open access policy
ISSN 1463-9076
1463-9084
Publication date 2004-01-01
Sub-type Article (original research)
DOI 10.1039/b312073b
Open Access Status Not Open Access
Volume 6
Issue 2
Start page 429
End page 433
Total pages 5
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Abstract Bubble-particle dewetting kinetics relevant to froth flotation was experimentally studied on a modelled system using a CCD high-speed video microscopy. The experimental system included a gas-liquid interface formed at the bottom of a glass capillary filled with either deionized Milli-Q water or a solution of dodecylamine chloride (DAC) and hydrophobic glass beads dropping onto the interface in the solution inside the capillary under gravity. The dewetting process was observed underside the gas-liquid interface with a metallographic inverted microscope and a CCD high-speed video system operating at about 1000 frames s(-1) for imaging the dewetting process. The velocities of the dewetting process showed a maximum in the pH-domain where the flotation recovery also showed a maximum. This good correlation between the dewetting kinetics and flotation recovery indicates that the dewetting kinetics is equally necessary as the thinning and rupture of the intervening liquid film between bubbles and particles for success of the flotation process. The discussion highlighted the need of developing a better understanding of the particle-bubble contact interaction, in particular, the difference in contact angles on micron-sized particles and flat surfaces.
Keyword Chemistry, Physical
Physics, Atomic, Molecular & Chemical
Dodecylammonium Chloride Solutions
Range Hydrophobic Forces
Mica Surfaces
Aqueous-electrolyte
Wetting Films
Air Bubble
Flotation
Water
Attachment
Rupture
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Chemical Engineering Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 4 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 5 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 17 Oct 2007, 12:36:52 EST