Structural and Shear Characteristics of Adsorbed -Casein and Monoglyceride Mixed Monolayers at the Air/Water Interfac
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- 作者：Juan M. Rodrí ; guez Patino ; Marta Cejudo Ferná ; ndez ; Cecilio Carrera Sá ; nchez ; and Ma. Rosario Rodrí ; guez Niñ ; o
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2006
- 出版时间：March 15, 2006
- 年：2006
- 卷：45
- 期：6
- 页码：1886 - 1895
- 全文大小：1007K
- 年卷期：v.45,no.6(March 15, 2006)
- ISSN：1520-5045
文摘
In this work, we have analyzed the structural (structure, topography, reflectivity, miscibility, and interactions)and surface shear characteristics of an adsorbed 
-casein and monoglyceride (monopalmitin and monoolein)mixed films at the air/water interface. Different and complementary interfacial techniques (surface film balance,Brewster angle microscopy, and interfacial shear rheology) have been utilized. The structural, topographical,and shear characteristics of the mixed films are dependent on the surface pressure and the composition of themixed film. The surface shear viscosity (
s) varies greatly with the surface pressure. Generally, the greaterthe surface pressure, the greater the values of s. At higher surface pressures, collapsed -casein residuesmay be displaced from the interface by monoglyceride molecules with important repercussions on the shearcharacteristics of the mixed films. Shear-induced change in the topography of monoglyceride and -caseindomains, on one hand, and segregation between domains of the film forming components, on the other hand,were also observed. The displacement of the -casein by the monoglycerides is facilitated under shearconditions, especially for -casein-monoolein mixed films.
-casein and monoglyceride (monopalmitin and monoolein)mixed films at the air/water interface. Different and complementary interfacial techniques (surface film balance,Brewster angle microscopy, and interfacial shear rheology) have been utilized. The structural, topographical,and shear characteristics of the mixed films are dependent on the surface pressure and the composition of themixed film. The surface shear viscosity (s) varies greatly with the surface pressure. Generally, the greaterthe surface pressure, the greater the values of s. At higher surface pressures, collapsed -casein residuesmay be displaced from the interface by monoglyceride molecules with important repercussions on the shearcharacteristics of the mixed films. Shear-induced change in the topography of monoglyceride and -caseindomains, on one hand, and segregation between domains of the film forming components, on the other hand,were also observed. The displacement of the -casein by the monoglycerides is facilitated under shearconditions, especially for -casein-monoolein mixed films.