The optical pattern and thermal behaviour of refined, bleached and deodorized (RRD) palm olein in a lamellar liquid crystalline structure of mixed cationic surfactants were investigated using the polarizing microscope and differential scanning calorimetry (DSC).

The results indicate some perturbations in the amphiphilic organization and a reduction in transition enthalpy on the addition of RBD palm olein into the lamellar structure.

Keywords: DSC, lamellar liquid, optical pattern, palm olein, surfactants, thermal behaviour