The effects of a soluble surfactant on quadrupole shape oscillations and dissolution of air bubbles in water

Single air bubbles were ultrasonically trapped in aqueous solutions of the soluble surfactant Triton X-100. Quadrupole shape oscillations were induced by modulation of the radiation pressure and the free decay was recorded using an optical extinction technique. The frequency and damping were found to be maximal at a bulk surfactant concentration which only weakly affects the surface tension. At higher concentrations the frequency is reduced due to surface tension depression and the damping approaches a value several times that expected for a clean interface. These results are in qualitative agreement with theoretical predictions based on interfacial viscoelastic considerations. Bubble size and dissolution curves were obtained through the use of digitized bubble images. Dissolution rates are shown to be significantly enhanced by the presence of the surfactant.

[1]  A. Prosperetti.  Free oscillations of drops and bubbles: the initial-value problem , 1980 .

[2]  V. Muller,et al.  Steady-state flows induced by oscillations of a drop with an adsorption layer , 1992 .

[3]  L. E. Scriven,et al.  The oscillations of a fluid droplet immersed in another fluid , 1968, Journal of Fluid Mechanics.

[4]  P. Marston.  Shape oscillation and static deformation of drops and bubbles driven by modulated radiation stresses—Theory , 1980 .

[5]  F. C. Roesler.  COMMENT ON "GAS BUBBLES IN SOLUTIONS" , 1951 .

[6]  R. Apfel,et al.  Shape oscillations of drops in the presence of surfactants , 1991, Journal of Fluid Mechanics.

[7]  M. S. Plesset,et al.  On the stability of gas bubbles in liquid-gas solutions , 1950 .

[8]  J. D’Arrigo.  Biological surfactants stabilizing natural microbubbles in aqueous media , 1983 .

[9]  Marios M. Fyrillas,et al.  Dissolution or growth of soluble spherical oscillating bubbles , 1994, Journal of Fluid Mechanics.

[10]  Leonard Liebermann,et al.  Air Bubbles in Water , 1957 .

[11]  L. Crum.  Measurements of the growth of air bubbles by rectified diffusion , 1980 .

[12]  P. Marston,et al.  Shape oscillations of bubbles in water driven by modulated ultrasonic radiation pressure: Observations and detection with scattered laser light , 1993 .

[13]  E. H. Lucassen-Reynders,et al.  Properties of capillary waves , 1970 .

[14]  R. Apfel,et al.  Quadrupole oscillations of drops for studying interfacial properties , 1990 .

[15]  Thomas J. Asaki,et al.  Free decay of shape oscillations of bubbles acoustically trapped in water and sea water , 1995 .

[16]  L. Berge.  Dissolution of air bubbles by the resistive pulse and the pressure reversal technique , 1990 .

[17]  N. Kawashima,et al.  Determination of critical micelle concentration of several nonionic surfactants by azo-hydrazone tautomerism of anionic dye , 1985 .

[18]  L. Crum.  Acoustic cavitation series: part five rectified diffusion , 1984 .

[19]  J. Daily,et al.  The use of coomassie brilliant blue for critical micelle concentration determination of detergents , 1986 .

[20]  R. Apfel,et al.  The effects of surfactant additives on the acoustic and light emissions from a single stable sonoluminescing bubble , 1996 .

[21]  E. London,et al.  Fluorimetric determination of critical micelle concentration avoiding interference from detergent charge. , 1984, Analytical biochemistry.

[22]  K. Tasaki.  Poly(oxyethylene)−Water Interactions: A Molecular Dynamics Study , 1996 .

[23]  L. Crum,et al.  Sonoluminescence, sonochemistry, and sonophysics , 1994 .

[24]  L. Thompson,et al.  Monte Carlo simulations of a single poly(oxyethylene) C12E3 chain headgroup fixed on a bilayer surface in water , 1994 .

[25]  R. Cooke,et al.  Generation of stabilized microbubbles in seawater. , 1981, Science.