Abstract
The ternary phase diagram of dodecyl dimethyl amino oxide (C12DMAO) perfluorooctanol (C7F15CH2OH) – H2O, sodium dodecyl sulfate (SDS) – (C7F15CH2OH) – H20, C12DMAO/SDS (66/33, w/w) – (C7F15CH2OH) – H20, and C12DMAO/SDS (33/66, w/w) – (C7F15CH2OH) – H20 systems have been studied. The identification of the phases was done by macroscopic observation of the sample either by naked eye or through crossed polarizers. For further characterization of the phases, different techniques were used such as electrical conductivity, polarization microscopy, 2H-NMR, and small angle X-ray scattering. The microstructure resulting from the self assembly of the surfactant can vary from normal micelle (L1), lamlar liquid crystal (Lα), to reverse micelles (L2), as relative volume fraction of apolar component increases over that of polar component.
ACKNOWLEDGMENT
We are indebted to Prof. H. Hoffmann of Bayreuth University, Germany, for providing the chemicals and supporting this work. Our thanks are extended to Al-Azhar University, especially the chemistry department, where this work was conducted in the physical chemistry research laboratory.