[en] The vast majority of commercially available surfactant are simple or derivatives of certain functional group having both polar and non-polar group. Many of the systems in which these products are used consist of several phases in contact which often include immiscible organic phase and water. It is therefore imperative to know how the water is distributed between the phase as the efficiency of a product in a real system depend on it being present in sufficient quantities in the correct phase. For this purposes, low angle X-ray diffraction was employed to elucidate the partitioning of water in a lamellar liquid crystalline phase in order to understand the influence of certain surfactant for cosmetic formulations. In this paper, the partitioning of water in anionic, cationic and nonionic surfactants will be presented with some experimental results

[en] The inner structure of lamellar liquid crystal before and after addition of RDB palm olein was characterised employing small-angle X-ray scattering (SAXS) technique and optical microscopy. Results show that the addition of RDB palm olein to both layered structure indicate a temporary disturbance resulting in penetration of RDB palm olein into the layered structure