Adsorption of hydroxypropyl methylcellulose at the liquid/liquid interface and the effect on emulsion stability

Surface Activity and Emulsification Properties of Hydrophobically Modified Dextrans

“…In other words, the value of C * is related to overlapping in the aqueous phase while the value of CC could be related to the polymer layer at the interface. Similar results were observed with hydroxypropyl methylcellulose (6) or pluronic (22). Moreover, adsorption isotherms of DexP in water on polylactic acid (13) or polystyrene particles (23) showed a plateau region obtained at similar polymer concentrations.…”

“…Although numerous studies have been devoted to hydrophobically modified polysaccharides, they are often dedicated to the associative behavior in semi-dilute aqueous solution while the surface-active properties are mentioned less (3)(4)(5)(6). Considering the hydrophobic derivatives of dextran, they were first prepared for partitioning in aqueous two-phase systems (7)(8)(9) by partial esterification with benzoïc acid.…”

Cellulose Polymers in Microencapsulation of Food Additives

“…High internal potential energy barriers for long polymer molecules must be overcome as the polymer adopts its optimal solution conformation at the oilÀwater interface, leading to attainment of the optimal interfacial tension. Further examination of the physicochemical process of stabilization of emulsion interfacial layers-diffusion of polymer from the bulk to the interface, followed by polymer adsorption at the interface-can be found (Wollenweber et al, 2000;Camino et al, 2009). Several other factors have been shown to affect the interfacial tension achieved by MC and HPMC (Sarkar, 1984).…”

Recubrimientos comestibles a base de hidroxipropil metilcelulosa: caracterización y aplicación

“…Los tensoactivos poseen una parte polar y otra apolar, por lo que se adsorben en la interfase aceite-agua como una monocapa orientada disminuyendo así, la tensión interfacial. En este sentido, el HPMC puede contribuir a la formación y estabilización de las FFRs por el aumento de la viscosidad de la fase continua (Wollenweber et al, 2000). porcentaje de deformación en el momento de la rotura (% E) así como el módulo de elasticidad (ME) de los films fueron evaluados por quintuplicado.…”

“…La transparencia (evaluada a través de la transmitancia interna, Ti), las coordenadas de color y el índice de blancura (IB) fueron determinadas aplicando la teoría de Kubelka-Munk (Hutchings, 1999) (Wollenweber et al, 2000;Dalgleish, 2006;Sovilj y Petrovic, 2006). Para mejorar la propiedad barrera al vapor de agua del hidrocoloide se incorporó una mezcla de lípidos formada por ácido oleico y un tensoactivo.…”