Evaluation of fat substitute mimicking Chinese human milk by its physicochemical properties and oxidative stability

摘要

To develop nutritional oil similar to Chinese human milk in terms of fatty acids compositionand triglyceride, several vegetable oils and 1,3-dioleoyl-2-palmitoylglycerol(OPO) were selected to prepare nutritional oil microcapsule. The result showed thathuman milk fat substitute (HMFS) prepared by these oils (soybean oil (SO): camelliaoil (CMO): high oleic sunflower oil (HOSO): corn oil (CRO): OPO = 28.24:0.00:12.94:8.82:50.00) was the optimal formula. After spray drying, the final microcapsuleproduct was milky white with good solubility and microencapsulation efficiency(MEE = 92.1%). The dispersion coefficient of the microcapsule particle size distributionwas 0.200 and the average particle size was 202.767 nm, both particle size distributionexperiment and scanning electron microscope (SEM) analysis indicated thatthe particle size of the microcapsule was uniform and the surface was smooth, After30 days’ accelerated experiment, the peroxide value of microcapsule products was10.24 meq/kg, indicating the product had good oxidative stability.