Preparation of novel oil powder

The novel oil powder was prepared by spray-drying with maltodextrin and arabic gum as wall material,coconut oil and rapeseed oil as core material,and polyglycerol ester and sodium caseinate(SC)as assisted material.The formula of the oil powder was optimized by orthogonal experiment.The optimal formula was as follows:dosage of polyglycerol ester 0.3%(based on the total mass of wall material and core material),mass ratio of maltodextrin to arabic gum 4∶ 1,dosage of SC 15%(based on the total mass of wall material and core material),solid content 30%(wall material solution),mass ratio of wall material to core material 3∶ 2,mass ratio of coconut oil to rapeseed oil 7∶ 3.The best spray-drying process parameters were as follows:inlet temperature 190 ℃,outlet temperature 90-100 ℃.Under the optimal conditions,the surface oil content of the oil powder with better sensory property was 1.19%,embedding efficiency was 96.06%.The degree of emulsification and stability of the emulsion produced by the oil powder were excellent.The oil powder had high nutritional value with 18.64% oleic acid and 4.16% linoleic acid.