Adsorption Kinetics with Surface Dilatation

Joos, P.; Uffelen, M. Van

doi:10.1006/jcis.1993.1036

Cited by 46 publications

(17 citation statements)

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“…(4) can be integrated using Laplace transformations and arranged into a form similar to the classical Ward and Tordai [43] equation for diffusion [2,44,45]:…”

Section: Modeling Of Surfactant Effectsmentioning

confidence: 99%

Droplet formation in microfluidic T-junction generators operating in the transitional regime. III. Dynamic surfactant effects

Glawdel

Ren

2012

Phys. Rev. E

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This study extends our previous work on droplet generation in microfluidic T-junction generators to include dynamic interfacial tension effects created by the presence of surfactants. In Paper I [T. Glawdel, C. Elbuken, and C. L. Ren, Phys. Rev. E 85, 016322 (2012)], we presented experimental findings regarding the formation process in the squeezing-to-transition regime, and in Paper II [T. Glawdel, C. Elbuken, and C. L. Ren, Phys. Rev. E 85, 016323 (2012)] we developed a theoretical model that describes the performance of T-junction generators without surfactants. Here we study dynamic interfacial tension effects for two surfactants, one with a small molecular weight that adsorbs quickly, and the other with a large molecular weight that adsorbs slowly. Using the force balance developed in Paper II we extract the dynamic interfacial tension from high speed videos obtained during experiments. We then develop a theoretical model to predict the dynamic interfacial tension in microfluidic T-junction generators as a function of the surfactant properties, flow conditions, and generator design. This model is then incorporated into the overall model for generator performance to effectively predict the size of droplets produced when surfactants are present.

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“…(4) can be integrated using Laplace transformations and arranged into a form similar to the classical Ward and Tordai [43] equation for diffusion [2,44,45]:…”

Section: Modeling Of Surfactant Effectsmentioning

confidence: 99%

Droplet formation in microfluidic T-junction generators operating in the transitional regime. III. Dynamic surfactant effects

Glawdel

Ren

2012

Phys. Rev. E

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“…In the of compressing the surface, we can use an analogous considsecond method, the surfactant solution is poured into the eration. The equations [4] -[13] remain valid; the only diftrough, made of Teflon, and the surface is swept off by a ference is that the subsurface concentration difference C s 0 fast-moving Teflon barrier across the whole area of the C 0 and the relative dilatational rate u of the surface have trough. The surface tension, which decreases with time, was changed their signs.…”

Section: T-experimentsmentioning

confidence: 99%

Rheological Properties of Fatty Acid Solutions at the Air/Water Interface

Fang

Wantke

Lunkenheimer

1996

Journal of Colloid and Interface Science

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“…[26] Compression properties have been investigated with moving-barrier devices, oscillating bubbles, excitation of surface waves, either capillary or compression waves and surface light scattering. [27][28][29][30] Large frequency variations of the viscoelastic coefficients have been reported, particularly for the compression coefficients of soluble monolayers, because of the important coupling with the bulk. This question was first addressed by Levich, who derived equations for the viscoelastic parameters' frequency variation when a sinusoidal compression is applied to the monolayer.…”

Section: Surface Viscoelasticitymentioning

confidence: 99%

Aqueous Foams: A Field of Investigation at the Frontier Between Chemistry and Physics

Langévin¹

2008

ChemPhysChem

105

113

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This paper reviews the properties of aqueous foams. The current state of knowledge is summarized briefly and the interdisciplinary aspects of this field of investigation are emphasized. Many phenomena are controlled by physical laws, but they are highly dependent upon the chemicals used as foam stabilizers: surfactants, polymers, particles. Most of the existing work is related to surfactants and polymer foams, and little is known yet for particle foams although research in this field is becoming popular. This article presents the general concepts used to describe the monolayers and the films and also some of the recent advances being made in this area.

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Adsorption Kinetics with Surface Dilatation

Cited by 46 publications

References 0 publications

Droplet formation in microfluidic T-junction generators operating in the transitional regime. III. Dynamic surfactant effects

Droplet formation in microfluidic T-junction generators operating in the transitional regime. III. Dynamic surfactant effects

Rheological Properties of Fatty Acid Solutions at the Air/Water Interface

Aqueous Foams: A Field of Investigation at the Frontier Between Chemistry and Physics

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