Effect of Alkane Chain Length and Counterion on the Freezing Transition of Cationic Surfactant Adsorbed Film at Alkane Mixture – Water Interfaces

Tokiwa, Yuhei; Sakamoto, Hiroyasu; Takiue, Takanori; Aratono, Makoto; Matsubara, Hiroki

doi:10.1021/acs.jpcb.5b02448

Cited by 31 publications

(34 citation statements)

References 32 publications

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“…This problem was considered in various books, such as [1][2][3][4]; also, a number of studies were published in which both adsorption (equilibrium and kinetic) and rheological characteristics at the surfactant aqueous solution/alkane (oil) interface are analysed [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Direct Determination of the Distribution Coefficient of Tridecyl Dimethyl Phosphine Oxide between Water and Hexane

Fainerman¹,

Sharipova

Aidarova

et al. 2018

Colloids and Interfaces

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Drop profile analysis tensiometry is applied to determine the distribution coefficient of a nonionic surfactant for a water/hexane system. The basic idea is to measure the interfacial tension isotherm in two configurations: a hexane drop immersed in the surfactant aqueous solutions at different bulk concentrations, and a water drop immersed into a hexane solution of the same surfactant. Both types of experiments lead to an isotherm for the equilibrium interfacial tensions with the same slope but with a concentration shift between them. This shift refers exactly to the value of the distribution coefficient.

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Section: Introductionmentioning

confidence: 99%

Direct Determination of the Distribution Coefficient of Tridecyl Dimethyl Phosphine Oxide between Water and Hexane

Fainerman¹,

Sharipova

Aidarova

et al. 2018

Colloids and Interfaces

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“…The series of papers by Bain, Aratono, Deutch, Ocko and their collaborators[84][85][86][87][88] revealed the role of various factors in the interfacial phase transitions at oil-water interface and opened the door for studying their effect on the emulsion properties. Very comprehensive review on the progress in this area was published recently by H. Matsubara and M. Aratono…”

mentioning

confidence: 99%

Surface phase transitions in foams and emulsions

Denkov

Cholakova

2019

Current Opinion in Colloid & Interface Science

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Surface phase transitions in surfactant adsorption layers are known to affect the dynamic properties of foams and to induce surface nucleation in freezing emulsion drops. Recently, these transitions were found to play a role in several other phenomena, opening new opportunities for controlling foam and emulsion properties. This review presents a brief outlook of the emerging opportunities in this area. Three topics are emphasized: (1) The use of surfactant mixtures for inducing phase transitions on bubble surfaces in foams; (2) The peculiar properties of natural surfactants saponins which form extremely viscoelastic surface layers; and (3) The main phenomena in emulsions, for which the surface phase transitions areimportant. The overall conclusion from the reviewed literature is that surface phase transitions could be used as a powerful tool to control many foam and emulsion properties, but we need deeper understanding of the underlying phenomena to explore fully these opportunities.

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“…24 In general, the surface density of surfactants increases at surface freezing transitions. 20 Hence, if the interfacial density of CTAC were to increase at the surface phase transition, it might lead to increased stability within DLVO theory through an increase in surface charge density. However, as shown in Figure S1 (A) in Supplementary Information, the difference in the surface density between 7.0 and 15.0 o C is no more than 0.3 mol m -2 .…”

Section: Resultsmentioning

confidence: 99%

“…For details of the interpretation of interfacial tension and ellipsometry data, see refs (15). and(20).…”

mentioning

confidence: 99%

Effect of Surface Freezing on Stability of Oil-in-Water Emulsions

et al. 2018

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Penetration of alkane molecules into the adsorbed film of a cationic surfactant gives rise to a surface freezing transition at the alkane-water interface upon cooling. In this paper, we show that surface freezing of hexadecyltrimethylammonium chloride (CTAC) at the tetradecane-water interface stabilizes oil-in-water (OW) emulsions. For concentrations of CTAC near the critical micelle concentration, an OW emulsion coalesced readily above the surface freezing transition whereas the OW emulsion was stable in the surface frozen state. There was a discontinuous change in the stability of the OW emulsion at a temperature very close to the surface phase transition temperature as determined by interfacial tensiometry and ellipsometry on a planar oil-water interface. The mechanical elasticity of the surface frozen layer opposes film drainage and density fluctuations that could lead to rupture and is the most likely cause of the enhanced emulsion stability.

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Effect of Alkane Chain Length and Counterion on the Freezing Transition of Cationic Surfactant Adsorbed Film at Alkane Mixture – Water Interfaces

Cited by 31 publications

References 32 publications

Direct Determination of the Distribution Coefficient of Tridecyl Dimethyl Phosphine Oxide between Water and Hexane

Direct Determination of the Distribution Coefficient of Tridecyl Dimethyl Phosphine Oxide between Water and Hexane

Surface phase transitions in foams and emulsions

Effect of Surface Freezing on Stability of Oil-in-Water Emulsions

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