以丁酸单双甘油酯为乳化剂制备饲用脂肪粉

Preparation of powdered oil for feeds by butyric acid mono-and di-glyceride as emulsifier

以自制的丁酸单双甘油酯及单甘酯为乳化剂,辛烯基琥珀酸淀粉酯为增稠剂,采用喷雾干燥方法,制备了高脂肪含量的饲用脂肪粉产品。产品表面油含量1.48%,包埋率97.32%,其复原乳状液稳定性好,无任何粒子挂壁迹象,静置24h后无沉淀、分层。比较原料调和油和脂肪粉产品的过氧化值,表明微胶囊化对抑制油脂过氧化值上升作用明显。并对存放180d的产品进行复原乳状液粒度的测定,表明饲用脂肪粉稳定性好,渗油及油脂微粒聚集现象不明显。

Adopting spray drying technology, powdered oil for feed products with high fat content was prepared by self made butyric acid mono-and di-glycerides, and mono glyceride as emulsifier, octenyl succinate starch as thickener. The content of at the productsurface oil was 1.48%, the encapsulation rate was 97.32%, the emulsion stability of recovery emulsion of the powdered oil was good, there was no phenomenon of particle hanging on the wall, no precipitate and layer phenomenon after stewing for 24 h. Comparing the peroxide values of raw blend oil and the powdered oil products, it was indicated that microencapsulation played an important role in inhibiting the rising rate of the peroxide value. Particle size distribution of recovery emulsion liquid of product stored for 180 d was determined and it was showed that the stability of powdered oil for feeds was good, the phenomenon of leakage and oil particle aggregation were not significant.