Dependence of the equilibrium thickness and double layer potential of foam films on the surfactant concentration

Exerowa, D.; Zacharieva, M.; Cohen, R.; Platikanov, Dimo

doi:10.1007/bf01761121

Cited by 133 publications

(55 citation statements)

References 18 publications

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“…The filled squares represent the equilibrium film thickness obtained in the absence of electrolyte; the filled circles and triangles represent the results obtained in the presence of 0.4mM and 1.0 mM electrolyte, respectively. These measurements agree well with the experimental data obtained by Aksoy (1997) and Exerowa et al (1979). In the low SDS concentration region, equilibrium film thickness increases with increasing SDS concentration were observed for all three lines.…”

Section: Sds (M)supporting

confidence: 92%

Establishment of the Center for Advanced Separation Technologies

Rimmer¹

2004

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Section: Sds (M)supporting

confidence: 92%

Establishment of the Center for Advanced Separation Technologies

Rimmer¹

2004

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“…This method has primarily been applied in the study of surfactant-laden films unlike the case of saline liquid films [41][42][43][44]. To date a few studies have been conducted on saline liquid films using the thin liquid micro-interferometric technique [4,21,26,27].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

A quantitative review of the transition salt concentration for inhibiting bubble coalescence

Firouzi

Howes

Nguyen

2015

Advances in Colloid and Interface Science

112

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Some salts have been proven to inhibit bubble coalescence above a certain concentration called the transition concentration. The transition concentration of salts has been investigated and determined by using different techniques. Different mechanisms have also been proposed to explain the stabilising effect of salts on bubble coalescence. However, as yet there is no consensus on a mechanism which can explain the stabilizing effect of all inhibiting salts. This paper critically reviews the experimental techniques and mechanisms for the coalescence of bubbles in saline solutions. The transition concentrations of NaCl, as the most popularly used salt, determined by using different techniques such as bubble swarm, bubble pairs, thin liquid film micro-interferometry were analysed and compared. For a consistent comparison, the concept of TC95 was defined as a salt concentration at which the -percentage coalescence‖ of bubbles reduces by 95% relative to the highest (100% in pure water) and lowest (in high-salt concentration) levels. The results show a linear relationship between the TC95 of NaCl and the reciprocal of the square root of the bubble radius. This relationship holds despite different experimental techniques, salt purities and bubble approach speeds, and highlights the importance of the bubble size in bubble coalescence. The available theoretical models for inhibiting effect of salts have also been reviewed. The failure of these models in predicting the salt transition concentration commands further theoretical development for a better understanding of bubble coalescence in salt solutions.

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“…• C. The formation of stable films requires dense packed monolayers of amphiphiles at the film surfaces (18). Phospholipids have very low solubility and the kinetics of monolayer formation is very slow.…”

Section: Methodsmentioning

confidence: 99%

Direct Investigation of the Vectorization Properties of Amphiphilic Cyclodextrins in Phospholipid Films

Javierre

Nedyalkov²,

Petkova³

et al. 2002

Journal of Colloid and Interface Science

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Dependence of the equilibrium thickness and double layer potential of foam films on the surfactant concentration

Abstract: Dependence of the equilibrium thickness and double layer potential of foam films on the surfactant concentration D . E x e r o w a , M. Z a c h a r i e v a , R. Cohen, and D . P l a t i k a n o v With 8 figures and 2 tables (

Cited by 133 publications

References 18 publications

Establishment of the Center for Advanced Separation Technologies

Establishment of the Center for Advanced Separation Technologies

A quantitative review of the transition salt concentration for inhibiting bubble coalescence

Direct Investigation of the Vectorization Properties of Amphiphilic Cyclodextrins in Phospholipid Films

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