A new pre-gelatinized starch preparing by gelatinization and spray drying of rice starch with hydrocolloids

•Rice starch was pre-mixed with pectin, xanthan gum, sodium alginate or ι-carrageenan.•Rice starch with hydrocolloids was gelatinized and spray dried (PRS-H).•PRS-H displayed concave granular shape with amorphous structure.•Hydrocolloids changed the cold paste viscosity, hydration, and rheology of PRS-H.