Phase Behavior of Palm Oil in Blends with Palm‐Based Diacylglycerol

Abstract

AbstractPhase behavior of palm oil (PO) in blends with different concentrations (10% intervals) of palm‐based diacylglycerol oil (PO‐DAG) was studied using the iso‐solid diagram, solid fat content (SFC) with the hardness thermal protocol, DSC melting and crystallization curves, X‐ray diffraction curves, and texture analysis (hardness). Minor eutectic effects were observed at around 20–50% PO‐DAG in 20–50% SFC iso‐lines. The phase behavior predicted by the iso‐solid diagram as well as SFC with the hardness thermal protocol did not account for hardness variations observed between PO and PO blends with 10–40% PO‐DAG. Nevertheless, the latter could be attributed to the corresponding DSC data as well as crystal polymorphism. However, as the concentration of PO‐DAG increased from 40% to 100%, iso‐line temperatures, SFC with the hardness thermal protocol, and also hardness were found to steadily increase. PO‐DAG at 10% concentration was found to have a β′‐stabilizing effect on the polymorphism of PO, while a β‐tending effect was observed as the concentration of PO‐DAG increased from 10% to 90%.