earticle

영어

The purpose of this study was to prepare stable water-in-corn oil (W/O) emulsion droplets coated by polyglycerolpolyricinoleate (PGPR). W/O emulsions (20 wt% aqueous phase, 80 wt% oil phase containing 8 wt% PGPR) were producedby high pressure homogenization (Emulsions 1), however, appreciable amount of relatively large water droplets (d>10µm)were found. To facilitate droplet disruption, viscosity of each phase was adjusted: (i) increased the viscosity of aqueous phaseby adding 0.1wt% xanthan (Emulsions 2); (ii) decreased the viscosity of oil phase and aqueous phase by heating themseparately at 50oC for 1hr immediately before emulsification (Emulsions 3). Homogenizing at the elevated temperatureclearly led to a smaller water droplet size, whereas xanthan neither improved nor adversely affected on the microstructures ofthe emulsions. In addition, the Emulsions 3 had good stability to droplet aggregation under shearing stress, thermal processing,and long term storage.