Submitted to: Conference on Rheometry
Publication Type: Abstract Only
Publication Acceptance Date: April 14, 2003
Publication Date: February 13, 2003
Technical Abstract: The ability to predict the rheological performance of various biopolymers is an important tool in optimizing processing procedures in the food industry. The applicability of various integral and differential constitutive models to describe the nonlinear viscolelastic behavior of cellulosic fiber gels investigated. The rheological properties of the gels were investigated using stress relaxation, small-amplitude oscillatory shear, strain jump, and steady-state shear expirements. The model parameters were fitted using stress relaxation data and predicitions of the models were compared to the experimental data. The cellulosic fiber gels were prepared from maize hulls by chemically and physically treating the pericarp cell wall substrate in a multistage process to disintegrate their morphological cellular structure. The presentation will discuss the rheological behavior of the cellulosic fiber gels and the viablility of the various constitutive models to describe the measured flow behavior.