Effect of Two Different Polysaccharides on the Stability of Emulsion Formed by Rapeseed Oil Bodies

Abstract

In order to improve the stability of emulsions of rapeseed oil bodies under different environmental conditions. The soluble soybean polysaccharide (SSPS) with negative electric charge and konjac glucomannan (KGM) without electric charge were used to form the emulsions of rapeseed oil bodies. Laser scattering particle analyzer and microscope were used to analyze the particle size and observe the microstructure of rapeseed oil body emulsions. The stability of emulsions of rapeseed oil bodies with two different polysaccharides under different environment stresses (pH, salt concentrations and heat treatments) was investigated, and the emulsions of rapeseed oil bodies without polysaccharide were used as control. The results of experiment showed that the particle of emulsions of rapeseed oil bodies decreased along with the increase of SSPS and KGM concentrations. In addition to pH2.0, the particle size of emulsions of rapeseed oil bodies without polysaccharide at different pH was significantly higher (P0.05) for the particle size of emulsions of rapeseed oil bodies without polysaccharide at different salt concentrations, the particle size was significantly higher (P0.05) on the particle size of emulsions of rapeseed oil bodies with SSPS. Comprehensive above results, KGM and SSPS can significantly improve the stability of the emulsions of rapeseed oil bodies, SSPS shows a better effect.

Keywords

• soluble soybean polysaccharide
• konjac glucomannan
• rapeseed oil bodies
• emulsions
• stability