Effect of salinity on the ultrasonic absorption and flow birefringence of microemulsions

Hirsch, Ernest; Debeauvais, F.; Candau, Françoise; Láng, J.; Zana, R.

doi:10.1051/jphys:01984004502025700

Cited by 9 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Macroscopically permanent birefringence occurs with lyotropic mesophases which are ordered on large scales. Anisotropy in electric (Rouvibre era/ 1979a, b, Hoffmann et a1 1981a, b, Schorr and Hoffmann 1981, Neeson et a1 1983, GuCring and Cazabat 1983 or magnetic susceptibility (Meyer et a1 1982, Porte et al 1984, Rosenblatt and Zolty 1985 or rheological properties (Backus and Scheraga 1951, Lob1 er a1 1984, Hirsch et al 1984a detects microscopic anisotropies that are averaged out in the absence of an external field. If these effects cannot be ascribed to molecules themselves (Hoffmann and Schorr 1985) or to critical fluctuations (Cant6 et a1 1985), they are due to aggregates.…”

Section: Macroscopic Techniquesmentioning

confidence: 99%

The structure of micelles and microemulsions

1990

View full text Add to dashboard Cite

From simple micelles in water, nearly spherical aggregates of amphiphilic molecules, to bicontinuous microemulsions, oil and water microheterogeneous mixtures stabilised by a surfactant film with both local and large-scale disordered structures, the world of surfactant-containing systems is fascinating. Depending on a subtle balance of attractive and repulsive interactions between molecules at interfaces, an extraordinarily rich polymorphism of aggregated structures can be observed. After summarising the basic general constraints controlling surfactant aggregation and the formation of interfaces, different structures of micelles and microemulsions are reviewed and related to interfacial film properties and the intermolecular interactions inside them. With such systems, both static (time-averaged) and dynamic properties control structures equally well. Structures of very different systems can be described in simple ways in terms of surfactant film average curvatures and flexibility.

show abstract

Section: Macroscopic Techniquesmentioning

confidence: 99%

The structure of micelles and microemulsions

1990

View full text Add to dashboard Cite

show abstract

“…In four-and five-component microemulsions (water, oil, surfactant, cosurfactant, electrolyte), ultrasonic absorbance measurements in the range 3-100 MHz show relaxations that have also been attributed to exchange processes (Hirsch et al, 1984;Lange et al, 1980). Middle phase (bicontinuous) microemulsions have relaxation frequencies of order 10 MHz, which is significantly faster than that responsible for the observed shear thinning in the present work.…”

Section: Aiche Journal 680mentioning

confidence: 95%