Ultrasonic formation of nanobubbles and their zeta-potentials in aqueous electrolyte and surfactant solutions

Cited 99 time in webofscience Cited 0 time in scopus
  • Hit : 265
  • Download : 0
The electrokinetic behaviors of nanobubbles internally generated by ultrasonication were investigated in terms of the stability of bubble, size distribution and zeta-potentials. When aqueous solutions were sonicated with a palladium electrode, stable nanobubbles having effective diameters of several hundreds nanometer were formed within a few minutes, and the sizes and size distributions remained stable for up to 1 h. The bubble sizes slightly increased when salts added and significantly reduced when surfactants added. As the chain length of alkyl group of C(n)TAB increased, the size and size distribution increased with n. A micellar model was proposed to explain the formation of nanobubbles and their size reduction. Zeta-potentials of nanobubbles showed a sharp change at CMC, increasing linearly with surfactant concentrations at low concentrations and invariant at high concentrations. The surface ionization and adsorbed monolayers at a bubble surface would result in a degree of dissociation of a planar air/water interface, but the calculated degree of dissociation at the bubble surface is very low compared with that of micelles. It would be attributed to the counter ion binding at interface or curvature effect. (c) 2005 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2005-11
Language
English
Article Type
Article
Keywords

GAS-BUBBLES; WATER

Citation

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.269, no.1-3, pp.28 - 34

ISSN
0927-7757
DOI
10.1016/j.colsurfa.2005.06.063
URI
http://hdl.handle.net/10203/91298
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 99 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0