Complex shear modulus determination in a large range of frequency by interconversion of the compliance for a starch/gluten blend [Détermination du module complexe de cisaillement dans un domaine élargi de fréquence pour un mélange gluten-amidon par interconversion de la fonction de fluage]

F. Errera , Christophe Derail (1) , Frédéric Léonardi (1) , O. Surel

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

Starch/gluten/water blends have been tested on a controlled stress rotational rheometer at room temperature. Rheological characterization of these blends was performed by measuring the complex shear modulus G* as a function of frequency at various water contents. For one of the blends we have performed a transient test by measuring the compliance, J, as a function of time. A Fourier transform has been applied to the function J(t) and we established a good correlation between the results of the dynamic test and of the transient test. This interconversion led to observe a cross over between G′ and G″ in the terminal zone never described in the litterature for doughs.

Domaines: Polymères

F. Errera, Christophe Derail, Frédéric Léonardi, O. Surel. Complex shear modulus determination in a large range of frequency by interconversion of the compliance for a starch/gluten blend [Détermination du module complexe de cisaillement dans un domaine élargi de fréquence pour un mélange gluten-amidon par interconversion de la fonction de fluage]. Sciences des aliments = Food science : an international journal of food science and technology, 2002, 22 (3), pp.319-325. ⟨hal-01616000⟩