A LAMELLAR LIQUID CRYSTAL WITH A VEGETABLE OIL

摘要

The molecular arrangement was studied in the sodium octanoate and cetyltrimethylammonium bromide (CTAB) system, a lamellar liquid crystal, before and after the addition of a vegetable oil [refined, bleached and deodorized (RED) palm olein] by means of small-angle x-ray diffraction and optical microscopy. Results from the small-angle x-ray showed the RBD palm olein molecules to be partitioned between the nonpolar methyl group layers for both systems. The water molecules, located between the polar bead groups, showed less penetrating tendency into the layered structure of cationic surfactant than into the anionic one, both before and after addition of RED palm olein. [References: 12]