Permeability of common black foam films to gas. Part 1

Krustev, R.; Platikanov, Dimo; Nedyalkov, M.

doi:10.1016/0927-7757(93)80167-d

Cited by 43 publications

(55 citation statements)

References 16 publications

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“…The permeation rates of thin soap films have been thoroughly investigated; see, for example, the review by Exerowa et al 15 It was established that the permeability is dependent on temperature, the type of electrolyte, type of surfactant, and their concentrations. [16][17][18][19][20][21] The thinnest soap films, known as Newton black films, consist of two surfactant monolayers absorbed onto each other. Somewhat thicker thin soap films, for which the monolayers are separated by a water layer, are known as common black films.…”

Section: Discussionmentioning

confidence: 99%

A simulation study of the kinetics of passage of CO2 and N2 through the liquid/vapor interface of water

Somasundaram

Panhuis

Lynden‐Bell

et al. 1999

The Journal of Chemical Physics

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A spectroscopic study of the fullerene/metal interface in C 60 -Al multilayers AIP Conf. Proc. 442, 265 (1998) The rate of passage of molecules of carbon dioxide and nitrogen through the vapor-liquid interface of water at 300 K is studied by simulation. Previous work has established the form of the free energy profile which has a minimum when the solute molecule is on the surface and a barrier between this state and solution in the bulk liquid. In one set of simulations, trajectories were initiated in the gas phase. From these, the average lifetime of molecules in the surface is determined to be considerably longer than the inverse of the energy relaxation rate, so that the sticking coefficient is one and exiting molecules have no memory of their original velocities. However, most molecules do return to the gas phase rather than entering the bulk solution. The rate of passage of molecules over the free energy barrier is studied using the reactive flux method with trajectories initiated near the top of the barrier. The results for nitrogen, in particular, give a good plateau in the time-dependent transmission coefficient and hence a reliable rate constant. The results from these two sets of simulations are combined to give an effective interface width which is used to determine the permeability of thin water films. These results are compared to experimental permeabilities of thin Newton black soap films. The rate-determining step for solution in bulk water is not passage through the few Å ngstroms width of the interface we study, but rather the transport from the vicinity of the interface into the bulk over the larger distance scale of m.

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Section: Discussionmentioning

confidence: 99%

A simulation study of the kinetics of passage of CO2 and N2 through the liquid/vapor interface of water

Somasundaram

Panhuis

Lynden‐Bell

et al. 1999

The Journal of Chemical Physics

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“…The gravitic potential energy change of the liquid from the substrate level to the Plateau border, λ 4 ρ L gh 2 , where ρ L g is the weight of liquid per unit volume, is negligible since h is much smaller than the capillary constant (γ L /ρ L g) 1/2 ∼ = 1.9 mm. We may then write [4] which explains the observed proportionality between τ and h. Since γ f > γ L and γ SV − γ SL ≥ γ L because the liquid solution wets the substrate, the proportionality factor in Eq. [4] is negative and of the order of γ f , as experimentally determined (Eq.…”

Section: Figmentioning

confidence: 99%

“…We may then write [4] which explains the observed proportionality between τ and h. Since γ f > γ L and γ SV − γ SL ≥ γ L because the liquid solution wets the substrate, the proportionality factor in Eq. [4] is negative and of the order of γ f , as experimentally determined (Eq. [3]).…”

Section: Figmentioning

confidence: 99%

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Apparent Contact Angle and Triple-Line Tension of a Soap Bubble on a Substrate

Rodrigues¹,

Saramago²,

Fortes³

2001

Journal of Colloid and Interface Science

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“…The thickness of the liquid layer can be controlled by the ion concentration in the core electrolyte [192]. A number of studies of gas permeation through monolayers of surfactants and Langmuir-Blodgett (LB) films have been published in recent years (see [166,[192][193][194][195] and references therein). LB films may be particularly useful for gas separation because of their extremely low thickness, i.e.…”

Section: Gas Permeation Through Thin Smectic Filmsmentioning

confidence: 99%

Surfaces and Interfaces of Free-Standing Smectic Films

Schüring¹,

Stannarius²

2004

Molecules in Interaction With Surfaces and Interfaces

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Abstract. Free-standing smectic films are unique fluid objects with an exceptionally large surface-to-volume ratio. They are excellently suited for studies of surface and interface properties of liquids. We describe surface tension measurements in the smectic and isotropic phases, with particular emphasis on anomalies near the phase transitions. A model that considers the excess surface entropy of ordered surface layers is applied to describe the experimental observations qualitatively and quantitatively. From the geometrical properties of isotropic droplets in free-standing films and from the forces acting on these droplets, interface tensions between the smectic and isotropic phases are derived. Finally, we report measurements of the gas permeation through smectic films and develop a model for the description of the film-thickness dependence of the permeation coefficient.

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Permeability of common black foam films to gas. Part 1

Cited by 43 publications

References 16 publications

A simulation study of the kinetics of passage of CO2 and N2 through the liquid/vapor interface of water

A simulation study of the kinetics of passage of CO2 and N2 through the liquid/vapor interface of water

Apparent Contact Angle and Triple-Line Tension of a Soap Bubble on a Substrate

Surfaces and Interfaces of Free-Standing Smectic Films

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