Water And Oil Microemulsion Phase Behavior And Physicochemical Properties Of Study

This thesis contains five parts, Part I. Introduction; Part II. The construction of the - - fishlike phase diagram; Part III. Phase behavior and solubilization of sodium dodecyl sulfate/alcohol/oil/brine microemulsion systems at different oil/water ratios; Part IV. Effect of alkane/water ratios on the phase behavior and solubilization of hexadecyl-trimethyl-ammonium bromide/alcohol/oil/brine microemulsion systems; Part V. Phase transformation of polyethylene glycol phenyl ether/alcohol/oil/brine microemulsion systems with oil/water ratios.Chapter I. IntroductionIn this chapter, the phase behavior of microemulsions and the research progress, the industral application and some phase diagrams used to study the phase behavior of microemulsions were introduced. Some factors influencing the phase behavior and solubilization ability of microemulsion systems, such as surfactant, alkane, salinity, and especially water/oil ratios on the phase behavior of microemulsion systems were discussed.Chapter II. The construction of an - - fishlike phase diagramThe - - fishlike phase diagram for microemulsion systems was introduced based on the - fishlike phase diagram. With this phase diagram, some important parameters of microemulsions, such as the composition of the interfacial layer, the solubilities of surfactant and alcohol, and the maximum solubilization ability of the microemulsion phase at various oil/water ratios can be calculated.Chapter III. Phase behavior and the solubilization of sodium dodecyl sulfate/alcohol/oil/brine microemulsion systems at different oil/water ratiosThe - - phase diagrams of the systems containing SDS/alcohol /alkane/brine were plotted.The phase behaviors of the microemulsion systems containing sodium dodecyl sulfate(SDS) /alcohol /oil/brine at various oil/water ratios were investigated by - - fishlike phase diagram and the physicalchemical properties of the microemulsion systems at various oil/water ratios were obtained from the phase diagram.1. The solubility of the alcohol in the microemulsion system increases as the values increase. In contrast, the solubilization ability of the microemulsion system on water and oil decrease as the values becomes larger. In addition, the mass fraction of the alcohol in the balanced interfacial layer (AS) decreases as values increase.2. The solubility ( B) of the alcohol increases and the mass fraction of the alcohol in the interfacial layer (AS) increases, as the carbon chain length of the alkane molecules increases,while the solubilization ability of the system would decrease.Chapter IV. Effect of alkane/water ratios on the phase behavior and solubilization of hexadecyl-trimethyl-ammonium bromide/alcohol/ oil/brine microemulsion systemsThe - fishlike phase diagram for microemulsion systems hexadecyl-trimethyl-ammonium bromide/alcohol/alkane/brine was plotted. Appliying the hydrophilic-lipophilic balanced(HLB) plane equation to the phase diagrams, some important parameters of microemulsions, such as the composition of the interfacial layer, the solubilities of surfactant and alcohol, and the maximum solubilization ability of the microemulsion phase at various values can be calculated.1. The solubility of the alcohol in the microemulsion system increases as values increase. In contrast, the solubilization ability of the microemulsion system on water and alkane decrease as the values becomes larger. In addition, the mass fraction of the alcohol in the balanced interfacial layer increase as values increase.2. Alkanes have notable effects on the properties of the microemulsion systems. As the carbon chain length of the alkane molecules increases, the solubility of the alcohol and the mass fraction of the alcohol in the interfacial layer increase. However, the solubilization ability of the system on water and alkane in the microemulsion system would decrease.Chapter V. Phase transformation of polyethylene glycol phenyl ether/alcohol/oil/brine microemulsion systems with oil/water ratiosThe phase behaviors of the microemulsion systems containing OP-10/alcohol /oil/brine at various oil/water ratios were investigated by - - fishlike phase diagram and the physicalchemical properties of the microemulsion systems at various oil/water ratios were obtained from the phase diagram.1. The solubility of the alcohol in the microemulsion system increases as the values increase. The solubilization ability of the microemulsion system on water and oil and the mass fraction of the alcohol in the balanced interfacial layer (AS) decrease as the values becomes larger.2. With increase in salinity, both the solubility (B) of the alcohol and the mass fraction of the alcohol in the interfacial layer (AS) increase. The solubilization ability of the system can be ignored.3. The effects of oil/water ratios on the phase behavior of three microemulsion systems formed by SDS, CTAB and OP-10 were compared. The solubility (B) of the alcohol increases and the solubilization ability of the systems decreases with oil/water ratios for the three systems. However, the mass fraction of the alcohol in the interfacial layer (AS) has the different change trends with oil/water ratios for the three systems.