Micro- and nano-emulsions based on soluble soy polysaccharide and octenyl succinic anhydride modified soluble soy polysaccharide

In this study, emulsion stabilised by soybean soluble polysaccharide (SSPS) and octenyl succinic anhydride modified SSPS (OSA-SSPS) with high molecular weight (HMW) at concentrations (2%, 3%, 4%, 5%, 6%) was prepared. The droplet size of emulsion stabilised by OSA-SSPS (HMW) was between 150 and 300 nm with a single distribution peak and increased by 0.1 mu m after 4 weeks; that of emulsion stabilised by SSPS was between 1 and 5 mu m with two distribution peaks and increased by more than 2 mu m after 4 weeks. The viscosity of emulsion with OSA-SSPS (HMW) was larger than that with SSPS, and the absolute value of zeta potential of microemulsion with SSPS was lower than 43 mV while that of nanoemulsion with OSA-SSPS (HMW) was higher than 46 mV. The stability of nanoemulsion with OSA-SSPS (HMW) slightly varied with the increase of storage time and concentration, which provided theoretical guidance for the application of OSA-SSPS in nanoemulsion.

Automated summary

This study prepared emulsions stabilized by different concentrations of SSPS and OSA-SSPS and found that the nanoemulsion stabilized by OSA-SSPS (HMW) had smaller droplet size, higher viscosity, and higher zeta potential compared to the emulsion stabilized by SSPS. The stability of nanoemulsion with OSA-SSPS (HMW) slightly varied with the increase of storage time and concentration, providing theoretical guidance for the application of OSA-SSPS in nanoemulsion.