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Formulating Middle Phase Microemulsions Using Extended Anionic Surfactant Combined with Cationic Hydrotrope |
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| Authors: | Ibrahim Kayali Khawla Qamhieh Ulf Olsson |
| Affiliation: | 1. College of Science and Technology, Al-Quds University , Jerusalem, Palestinei_kayali@yahoo.com;3. College of Science and Technology, Al-Quds University , Jerusalem, Palestine;4. Physical Chemistry 1, Center for Chemistry and Chemical Engineering, Lund University , Lund, Sweden |
| Abstract: | The phase behavior of systems containing sodium alkyl polypropylene oxide sulfate with equimolar ratio of polypropylene oxide ammonium chloride was determined as a function of salt concentration and alkane carbon number at ambient temperature. Visual inspection as well as cross polarizers were used to detect anisotropy. Solubilization ratios for oil and brine in the middle phases were measured and used to calculate the interfacial tension (IFT) between the microemulsion and oil or brine. The fish diagram is presented showing a minimum amount of 0.20 wt% surfactant needed to form the middle phase. Swelling increases with decreasing the alkane carbon number of the oil. Ultra low IFT values were predicted for the systems investigated. |
| Keywords: | Cationic hydrotrope extended surfactant microemulsion middle phase |