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Abstract:

The surface behaviour of hydroxypropylmethylcelluloses (HPMC) was studied at the air-water (A/W) and oil-water (O/W) interfaces. At the A/W interface, the π-C isotherms were sigmoidal and presented inflexions as the HPMC bulk concentration increases, related with different structural patterns adopted by the biopolymer segments. The behaviour of these biopolymers at the O/W interface resulted different. No inflections in the adsorption isotherm were observed, denoting the absence of any change in the structure of the adsorbed monolayer. The order in the interfacial activity was different at the two interfaces. The dynamics of adsorption showed that the surface pressure (π) values and the rate of adsorption/penetration were lower at the O/W interface. Analogously to π values, the surface dilatational modulus was smallest at the O/W interface, however at long-term adsorption strong viscoelastic films are formed at the O/W interface. © 2009 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Hydroxypropylmethylcellulose surface activity at equilibrium and adsorption dynamics at the air-water and oil-water interfaces
Autor:Camino, N.A.; Pérez, O.E.; Sanchez, C.C.; Rodriguez Patino, J.M.; Pilosof, A.M.R.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Guiraldes s/n, (1428), Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Departamento de Ingeniería Química, Facultad de Química, c/Prof. García González, 41012 Seville, Spain
Palabras clave:Adsorption; Air-water interface; Hydroxypropylmethylcellulose; Oil-water interface; Polysaccharide
Año:2009
Volumen:23
Número:8
Página de inicio:2359
Página de fin:2368
DOI: http://dx.doi.org/10.1016/j.foodhyd.2009.06.013
Título revista:Food Hydrocolloids
Título revista abreviado:Food Hydrocolloids
ISSN:0268005X
CODEN:FOHYE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0268005X_v23_n8_p2359_Camino

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Citas:

---------- APA ----------
Camino, N.A., Pérez, O.E., Sanchez, C.C., Rodriguez Patino, J.M. & Pilosof, A.M.R. (2009) . Hydroxypropylmethylcellulose surface activity at equilibrium and adsorption dynamics at the air-water and oil-water interfaces. Food Hydrocolloids, 23(8), 2359-2368.
http://dx.doi.org/10.1016/j.foodhyd.2009.06.013
---------- CHICAGO ----------
Camino, N.A., Pérez, O.E., Sanchez, C.C., Rodriguez Patino, J.M., Pilosof, A.M.R. "Hydroxypropylmethylcellulose surface activity at equilibrium and adsorption dynamics at the air-water and oil-water interfaces" . Food Hydrocolloids 23, no. 8 (2009) : 2359-2368.
http://dx.doi.org/10.1016/j.foodhyd.2009.06.013
---------- MLA ----------
Camino, N.A., Pérez, O.E., Sanchez, C.C., Rodriguez Patino, J.M., Pilosof, A.M.R. "Hydroxypropylmethylcellulose surface activity at equilibrium and adsorption dynamics at the air-water and oil-water interfaces" . Food Hydrocolloids, vol. 23, no. 8, 2009, pp. 2359-2368.
http://dx.doi.org/10.1016/j.foodhyd.2009.06.013
---------- VANCOUVER ----------
Camino, N.A., Pérez, O.E., Sanchez, C.C., Rodriguez Patino, J.M., Pilosof, A.M.R. Hydroxypropylmethylcellulose surface activity at equilibrium and adsorption dynamics at the air-water and oil-water interfaces. Food Hydrocolloids. 2009;23(8):2359-2368.
http://dx.doi.org/10.1016/j.foodhyd.2009.06.013