Contextos múltiples : Colección Escolano

Sumario: La Colección Escolano fue donada al Gobierno de Aragón en 1996. Román Escolano (Zaragoza, 1933-2011) orientó hacia la obra gráfica su vocación como coleccionista de arte del siglo XX. La exposición «Contextos múltiples: Colección Escolano» pretende rendir tributo a la figura del coleccionista zaragozano. El IAACC cuenta entre sus fondos con más de setecientas obras de arte gráfico, estampas, libros o carpetas de más de cuatrocientos destacados artistas españoles y extranjeros activos durante la segunda mitad del siglo XX (1954-1994

Structural heterogeneities in starch hydrogels

Hydrogels have a complex, heterogeneous structure and organisation, making them promising candidates for advanced structural and cosmetics applications. Starch is an attractive material for producing hydrogels due to its low cost and biocompatibility, but the structural dynamics of polymer chains within starch hydrogels are not well understood, limiting their development and utilisation. We employed a range of NMR methodologies (CPSP/MAS, HR-MAS, HPDEC and WPT-CP) to probe the molecular mobility and water dynamics within starch hydrogels featuring a wide range of physical properties. The insights from these methods were related to bulk rheological, thermal (DSC) and crystalline (PXRD) properties. We have reported for the first time the presence of highly dynamic starch chains, behaving as solvated moieties existing in the liquid component of hydrogel systems. We have correlated the chains’ degree of structural mobility with macroscopic properties of the bulk systems, providing new insights into the structure-function relationships governing hydrogel assemblies