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Abstract:

The bulk and oil-water (O/W) surface behaviour of four different commercial types of hydroxypropylmethylcelluloses (HPMCs) was studied at pH3 and 6.Dynamic light scattering (DLS) analysis of particle size distribution in HPMC water solutions indicated cluster formation at pH6 for most types.The dynamics of adsorption showed that the surface pressure (π) values and the rate of adsorption/penetration were lower at pH3.The surface dilatational modulus of films at pH6 showed a continuous increase indicating a slow formation of a viscoelastic interfacial film. Nevertheless, at pH3 in most cases a viscoelastic film was not formed.The results obtained at the oil-water interface well correlated with DLS.Among all the HPMC studied, E5LV showed over all the best performance at this oil-water interface due to its low molecular weight and high decrease of interfacial tension. Its high hydrophobicity allows a strong tendency to interact at the interface to form elastic films. © 2010 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Hydroxypropylmethylcellulose at the oil-water interface. Part I. Bulk behaviour and dynamic adsorption as affected by pH
Autor:Camino, N.A.; Sánchez, C.C.; Rodríguez Patino, J.M.; Pilosof, A.M.R.
Filiación:CONICET, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Universidad de Buenos Aires, Intendente Guiraldes s/n, 1428 Buenos Aires, Argentina
Departamento de Ingeniería Química, Facultad de Química, Universidad de Sevilla, C/o Prof. García González, 41012 Seville, Spain
Palabras clave:Adsorption; Hydrophobic interactions; Hydroxypropylmethylcellulose; Oil-water interface
Año:2011
Volumen:25
Número:1
Página de inicio:1
Página de fin:11
DOI: http://dx.doi.org/10.1016/j.foodhyd.2010.04.012
Título revista:Food Hydrocolloids
Título revista abreviado:Food Hydrocolloids
ISSN:0268005X
CODEN:FOHYE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0268005X_v25_n1_p1_Camino

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Citas:

---------- APA ----------
Camino, N.A., Sánchez, C.C., Rodríguez Patino, J.M. & Pilosof, A.M.R. (2011) . Hydroxypropylmethylcellulose at the oil-water interface. Part I. Bulk behaviour and dynamic adsorption as affected by pH. Food Hydrocolloids, 25(1), 1-11.
http://dx.doi.org/10.1016/j.foodhyd.2010.04.012
---------- CHICAGO ----------
Camino, N.A., Sánchez, C.C., Rodríguez Patino, J.M., Pilosof, A.M.R. "Hydroxypropylmethylcellulose at the oil-water interface. Part I. Bulk behaviour and dynamic adsorption as affected by pH" . Food Hydrocolloids 25, no. 1 (2011) : 1-11.
http://dx.doi.org/10.1016/j.foodhyd.2010.04.012
---------- MLA ----------
Camino, N.A., Sánchez, C.C., Rodríguez Patino, J.M., Pilosof, A.M.R. "Hydroxypropylmethylcellulose at the oil-water interface. Part I. Bulk behaviour and dynamic adsorption as affected by pH" . Food Hydrocolloids, vol. 25, no. 1, 2011, pp. 1-11.
http://dx.doi.org/10.1016/j.foodhyd.2010.04.012
---------- VANCOUVER ----------
Camino, N.A., Sánchez, C.C., Rodríguez Patino, J.M., Pilosof, A.M.R. Hydroxypropylmethylcellulose at the oil-water interface. Part I. Bulk behaviour and dynamic adsorption as affected by pH. Food Hydrocolloids. 2011;25(1):1-11.
http://dx.doi.org/10.1016/j.foodhyd.2010.04.012