Large amplitude oscillatory shear behavior and tribological properties of gum extracted from Alyssum homolocarpum seed

Abstract

Fundamental understanding of polysaccharide lubrication and large-strain rheological behaviors is needed for targeted design of foods with more desirable texture and sensory attributes. Thus, the objective of this study was to investigate large amplitude oscillatory shear (LAOS) behavior and tribological properties of Alyssum homolocarpum seed gum aqueous dispersions at different concentrations (1-3% w/v) and temperatures (5-50 °C). Dispersions prepared at higher concentrations showed greater stability to permanent deformation under LAOS and lower friction coefficients. These results were attributed to greater molecular connectivity and structure development at higher concentrations. Increased temperature did not have strong effects on the tribological behavior of the dispersions; however, less permanent deformation at large strain was observed at higher temperatures. These results provide a more complete picture of Alyssum homolocarpum rheological behavior, which can be used to design foods with more desirable textures.