Effect of storage time and temperature on the stability and rheological properties of starch-soluble dietary fiber nanocomposite stabilized emulsion

Abstract

Nanocomposites are a promising material for the stabilization and rheology modification of food emulsions due to their unique physicochemical properties. The effects of storage time and temperature on the rheological and stability properties of Bambara groundnut starch-soluble dietary fiber nanocomposite (STASOL) stabilized emulsions were evaluated. Emulsions were formulated with orange oil (30%), water (50%) and STASOL (20%). The backscattering profile of emulsions stored at 5 and 45 °C showed the least and most separation between scans, respectively. On day 20, the emulsions stored at 45 °C had completely separated into two layers. The viscosity of emulsions stored at 20 and 45 °C decreased after the third day while that of emulsions stored at 5 °C had significantly (p < 0.05) decreased after nine days. Time and temperature both played a major role in the destabilization of emulsions, with those stored at 5 and 45 °C showing the least and most destabilization over time, respectively.