Flow-induced molecular segregation in beta-casein-monoglyceride mixed films spread at the air-water interface

Langmuir : the ACS Journal of Surfaces and Colloids
Cecilio Carrera Sánchez, J M Rodríguez Patino

Abstract

In this work, we have used different and complementary interfacial techniques (surface film balance, Brewster angle microscopy, and interfacial shear rheology) to analyze the static (structure, topography, reflectivity, miscibility, and interactions) and flow characteristics (surface shear characteristics) of beta-casein and monoglyceride (monopalmitin and monoolein) mixed films spread on the air-water interface. The structural, topographical, and shear characteristics of the mixed films depend on the surface pressure and on the composition of the mixed film. The surface shear viscosity (etas) varies greatly with the surface pressure. In general, the greater the surface pressure, the greater the values of etas. At higher surface pressures, collapsed beta-casein residues may be displaced from the interface by monoglyceride molecules with important repercussions on the shear characteristics of the mixed films. A shear-induced change in the topography of monoglyceride and beta-casein domains, on one hand, and a segregation between domains of the film-forming components, on the other hand, were also observed. The displacement of the beta-casein by the monoglycerides is facilitated under shear conditions, especially for beta-casein-...Continue Reading

References

Dec 22, 1999·Journal of Agricultural and Food Chemistry·J M Rodríguez PatinoM R Rodríguez Niño
Feb 15, 2001·Colloids and Surfaces. B, Biointerfaces·E Dickinson
Mar 27, 2001·Nature·J Ignés-Mullol, D K Schwartz
Aug 21, 2001·Advances in Colloid and Interface Science·M A Bos, T van Vliet
Dec 28, 2002·Journal of Agricultural and Food Chemistry·Juan M Rodríguez PatinoCecilio Carrera Sánchez
Jun 23, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Juan M Rodríguez Patino, Cecilio Carrera Sánchez

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Citations

May 19, 2007·Journal of Colloid and Interface Science·Juan M Rodríguez PatinoMa Rosario Rodríguez Niño
Feb 19, 2008·Advances in Colloid and Interface Science·Juan M Rodríguez PatinoMa Rosario Rodríguez Niño
Sep 14, 2004·Biomacromolecules·Juan M Rodríguez Patino, Cecilio Carrera Sánchez
May 22, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Marta Cejudo FernándezJuan M Rodríguez Patino

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