Influence of adsorption of nalkyltrimethylammonium bromides (C8, C12, C16) and bubble motion on kinetics of the bubble attachment to mica surface
 
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Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences
CORRESPONDING AUTHOR
Kazimierz Malysa   

Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow
Publication date: 2011-06-01
 
Physicochem. Probl. Miner. Process. 2011;47(1):237–248
 
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ABSTRACT
Influence of adsorption of n-alkyltrimethylammonium bromides (C8, C12, C16) and formation of motion induced dynamic architecture of adsorption layer (DAL) over surface of the colliding bubble on kinetics of three-phase contact (TPC) formation at mica surface was studied. The dynamic phenomena occurring during the bubble collisions were monitored using a high-speed camera of frequency 1040 Hz. The effect of solution concentration and the DAL formation, due to the bubble motion, was determined. It was showed that stability of the wetting film formed between the colliding bubble and mica surface was governed by the electrostatic interactions between the film interfaces. It was found that when the distance covered by the bubble (i.e. the distance between the capillary and the mica surface) was L=3 mm (location “close”) then the time of the three phase contact formation (tTPC), was significantly shorter than for the L=100 mm (location “far”). The differences between the tTPC for the locations “close” and “far” were the largest at lowest concentration. The mechanism responsible for significant differences in the tTPC values for the location “close” and “far” is described.
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ISSN:1643-1049