Bubble Motion in Aqueous Surfactant Solutions

Liao, Ying‐Chih; McLaughlin, John B.

doi:10.1006/jcis.2000.6741

Cited by 50 publications

(32 citation statements)

References 23 publications

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“…With increasing solution concentration the position of the maximum on the local velocity profiles is shifted towards shorter distances, while its height and width are diminishing. Thus, influence of the BSA in solutions of pH = 5.8 was similar to that of typical surfactants (Sam et al 1996;Liao and McLaughlin 2000;Krzan and Malysa 2002;Krzan et al 2004Krzan et al , 2007Malysa et al 2005;. At the highest BSA concentration studied (c = 6 × 10 −7 M) the bubble terminal velocity of ca.…”

Section: Velocity Of the Rising Bubblesmentioning

confidence: 91%

“…Velocity of the bubbles rising in surfactant solutions is strongly slowed down (Levich 1962;Clift et al 1978;Sam et al 1996;Liao and McLaughlin 2000;Krzan and Malysa 2002;Krzan et al 2004Krzan et al , 2007 due to presence of the adsorption layer at their surfaces. Adsorption layer at the rising bubble surface retards fluidity of the gas/liquid interface and therefore the viscous drag exerted by continuous medium is increased (Levich 1962).…”

Section: Introductionmentioning

confidence: 97%

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Influence of pH of the BSA solutions on velocity of the rising bubbles and stability of the thin liquid films and foams

et al. 2010

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Influence of pH of the BSA solutions on velocity of the rising bubbles, stability of foams, and properties of single foam and wetting films was studied. It was found that the solution pH affected significantly the BSA surface activity and properties of the protein adsorption layer under dynamic and static conditions. At pH close to the isoelectric point (pH IEP = 4.8) the BSA showed the highest surface activity. The equilibrium microscopic foam films of thicknesses of 64-80 nm, depending on the BSA concentration, were obtained at pH = 5.8. Under dynamic conditions the bubble rising velocity was reduced in a highest degree and the foam formed were most stable at the solutions pH-5.8 and 4.8. Lowering the bubble velocity shows that the BSA adsorption layer was formed, which retarded fluidity of the bubble surface. When the solution pH was significantly lower (pH = 3.9) or much higher (pH = 10) than the pH IEP then the BSA practically had no influence on the bubble velocity and the foam stability was drastically reduced. Moreover, the pH variations affected also the time of the threephase contact (TPC) formation on mica surface covered by the BSA adsorption layers. These pH dependent changes in the BSA surface activity indicate that the BSA linear conformers, existing at pH far away from the pH IEP , have much higher affinity to aqueous phase resulting from higher net electrical charge present over the extended BSA molecule conformers.

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Section: Velocity Of the Rising Bubblesmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 97%

Influence of pH of the BSA solutions on velocity of the rising bubbles and stability of the thin liquid films and foams

et al. 2010

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“…of Triton X-100. Liao used slightly smaller bubbles (0.69 mm) in her experiment, and her experiments were conducted in a shorter column (1.22 m instead of 3 m) than the one used by Zhang et al [1]. The use of a shorter column was possible since, in the concentration range considered by Liao, the bubble reached its terminal velocity more quickly.…”

Section: Liao and Mclaughlinmentioning

confidence: 96%

Comments on “Bubble motion in aqueous surfactant solutions”

Liao¹,

Wang²,

Nunge³

et al. 2004

Journal of Colloid and Interface Science

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“…The shape of the drop has been assumed to remain spherical throughout this simulation. Liao and McLaughlin [27] have simulated the effects of a surfactant on the unsteady motion and shape of a single bubble released in water. They have considered the bubble to be immersed in an unbounded liquid medium and have also treated the bubble as a void.…”

Section: Introductionmentioning

confidence: 99%