Research of the emulsifying characteristics of OSA modified starch and the effect on the preparation of nano emulsions

In this research,octenyl succinate anhydride modified starch( OSA starch) was chosen as emulsifier to prepare a nanoemulsion system to contain lycopene and the emulsifying characteristics of OSA starch were determined.The result showed that OSA starch showed an optimal emulsifying characteristics when dissolved at 70 ℃ with 30%( w/w) concentration.Nanoemulsions using OSA modified starch as emulsifier were prepared by high-pressure homogenization with particle size of about 120 nm,where the rate of oil to aqueous phase was 1∶ 9( w/w),lycopene( 0.1%,w/w) in MCT and the lycopene retention was 63%.After 30 days of storage at room temperature,the particle sizes was increased to 160 nm with the growth of less than34%,and there was no obvious phase separation for the sample,indicating that OSA modified starch was a suitable emulsifier for the preparation of nanoemulsions.