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Abstract:

Dynamics of adsorption and viscoelasticity of biopolymers (β-lactoglobulin (β-lg) + polysaccharides (PS)) at 20°C and pH 7 have been studied. Protein concentration in the 'bulk phase was 0.1 wt%, and the concentration of polysaccharides (xanthan gum, λ-carrageenan, and propylenglicol alginate with different degrees of esterification and viscosity) was varied from 0.1% to 0.5 wt%. The results reveal a significant effect of surface-active and non surface-active polysaccharides on the dynamics of the formation and viscoelasticity of adsorbed films at the air-water interface. The rate of diffusion of the biopolymers increased in the mixed systems, but the effect was more significant at the highest concentration of polysaccharide (0.5 wt %). The rate of rearrangement of the adsorbed films decreased in the presence of polysaccharides as compared to the protein film. Competitive adsorption, complexation and limited thermodynamic incompatibility between β-lactoglobulin and polysaccharide would explain the observed effects. © 2006 American Institute of Chemical Engineers.

Registro:

Documento: Artículo
Título:Adsorption and rheological properties of biopolymers at the air-water interface
Autor:Baeza, R.; Pilosof, A.M.R.; Sanchez, C.C.; Rodríguez Patino, J.M.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, (1428), Buenos Aires, Argentina
Departamento de Ingeniería Química, Facultad de Química, Universidad de Sevilla, c/. Prof. Garcia Gonzalez, 1, 41012, Sevilla, Spain
Palabras clave:β-lactoglobulin; Adsorption; Air-water interface; Biopolymers; Interfacial activity; Macromolecules; Polysaccharides; Surface rheology; Adsorption; Interfaces (materials); Macromolecules; Polysaccharides; Rheology; Viscosity; Air-water interface; Interfacial activity; Lactoglobulin; Surface rheology; Biopolymers; Adsorption; Biopolymers; Interfaces (materials); Macromolecules; Polysaccharides; Rheology; Viscosity
Año:2006
Volumen:52
Número:7
Página de inicio:2627
Página de fin:2638
DOI: http://dx.doi.org/10.1002/aic.10855
Título revista:AIChE Journal
Título revista abreviado:AIChE J.
ISSN:00011541
CODEN:AICEA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00011541_v52_n7_p2627_Baeza

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Citas:

---------- APA ----------
Baeza, R., Pilosof, A.M.R., Sanchez, C.C. & Rodríguez Patino, J.M. (2006) . Adsorption and rheological properties of biopolymers at the air-water interface. AIChE Journal, 52(7), 2627-2638.
http://dx.doi.org/10.1002/aic.10855
---------- CHICAGO ----------
Baeza, R., Pilosof, A.M.R., Sanchez, C.C., Rodríguez Patino, J.M. "Adsorption and rheological properties of biopolymers at the air-water interface" . AIChE Journal 52, no. 7 (2006) : 2627-2638.
http://dx.doi.org/10.1002/aic.10855
---------- MLA ----------
Baeza, R., Pilosof, A.M.R., Sanchez, C.C., Rodríguez Patino, J.M. "Adsorption and rheological properties of biopolymers at the air-water interface" . AIChE Journal, vol. 52, no. 7, 2006, pp. 2627-2638.
http://dx.doi.org/10.1002/aic.10855
---------- VANCOUVER ----------
Baeza, R., Pilosof, A.M.R., Sanchez, C.C., Rodríguez Patino, J.M. Adsorption and rheological properties of biopolymers at the air-water interface. AIChE J. 2006;52(7):2627-2638.
http://dx.doi.org/10.1002/aic.10855