Structural and shear characteristics of adsorbed sodium caseinate and monoglyceride mixed monolayers at the air-water interface |
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| Authors: | Rodríguez Patino Juan M Cejudo Fernández Marta Carrera Sánchez Cecilio Rodríguez Niño Ma Rosario |
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| Institution: | Departamento de Ingeniería Química, Facultad de Química, Universidad de Sevilla, Seville, Spain. jmrodri@us.es |
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| Abstract: | The structural and shear characteristics of mixed monolayers formed by an adsorbed Na-caseinate film and a spread monoglyceride (monopalmitin or monoolein) on the previously adsorbed protein film have been analyzed. Measurements of the surface pressure (pi)-area (A) isotherm and surface shear viscosity (eta(s)) were obtained at 20 degrees C and at pH 7 in a modified Wilhelmy-type film balance. The structural and shear characteristics of the mixed films depend on the surface pressure and on the composition of the mixed film. At surface pressures lower than the equilibrium surface pressure of Na-caseinate (at pipi(e)(CS) have important repercussions on the shear characteristics of the mixed films. |
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