The present study was aimed to enhance the storage stability of oil-in-water Pickering emulsion using esterified buckwheat starch. The starch esterified with 0.5-3% octenyl succinic anhydride (OSA) showed degree of substitution between 0.0032 ± 0.001 and 0.0229 ± 0.003, respectively. The esterification increased the particle size (7.44 ± 0.03-7.60 ± 0.03μm), changed the smooth surface morphology to rough and converted the sharp-edged granules to irregular shapes. Major structural changes were occurred in the amorphous region, confirmed by X-ray diffraction as crystallinity decreased (25.6-20.9%) after modification. FTIR showed a peak at 1750cm-1 and Nuclear magnetic spectra showed specific peaks at 0.80-0.89 and 1.2-2.7 ppm, which confirmed OSA modification. The amphiphilic granules with improved structure and morphology were utilized to stabilize oil-in-water Pickering emulsion prepared by ultrasonication with 30 and 40% amplitude for 2 and 4min. The stable Pickering emulsion with 3.43-86.86μm droplet diameters was observed to be formed with...

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