Abstract:To enhance the bioavailability of bioactive ingredients，this study investigated the relationship between starch-based carrier materials with different molecular structures and the properties of Pickering emulsion.Common maize starch and waxy maize starch were modified by octenyl succinic anhydride（OSA）esterification and high-temperature degradation（HD）.The obtained two modified starches were characterized by Fourier transform infrared spectroscopy and X-ray diffraction and then used for the preparation of Pickering emulsions.The particle size，zeta-potential，and of free fatty acid（FFA）release rate of the Pickering emulsions were determined.The OSA-starch with the OSA group showed A-type crystalline structure.The hightemperature degradation significantly decreased the viscosity of starch，which was beneficial to the formation of stable starch-based Pickering emulsion.Moreover，as the degree of substitution（DS）increased，the starchbased Pickering emulsion showcased decreased size and increased zeta-potential.In in vitro digestion，the FFA release rate of the Pickering emulsion increased from 42.86%to 47.14%with the increase in DS.The OSAWaxy-HD Pickering emulsion with steady FFA release rate had good performance in controlled releasing.