Water And Oil Phase Composition On The Properties Of Microemulsion Phase Behavior And Solubilization Effect Research

This thesis contains five parts. Chapter I. Introduction. Chapter II. Phase diagramsand related parameters for microemulsion systems. Chapter III. Phase behavior oftween type microemulsion systems at different oil/water mass ratios. Chapter IV.Effect of oil/water mass ratios on the phase behavior and solubilization ofC16mimBr/cosurfactant/oil/brine microemulsion systems. Chapter V. Phase behaviorand solubilization of C12mimBr/butan-1-ol/oil/brine microemulsion systems atdifferent oil/water mass ratios.Chapter Ⅰ. IntroductionThe definition of microemulsions, the application of modern technology onmicroemulsions and the related research progress were introduced. The factors whichinfluence the phase behavior and solubilization ability of microemulsion systems,such as surfactant, oil, salinity, and especially oil/water mass ratios were discussed.Chapter Ⅱ. Phase diagrams and related parameters formicroemulsion systems.Several kinds of phase diagrams and the research progress of microemulsionswere introduced. The α-ε-β phase diagram was discussed.Chapter Ⅲ. Phase behavior of tween type microemulsion systems atdifferent oil/water mass ratios.The phase diagram, physicalchemical properties of the microemulsion systemscontaining tween/alcohol/oil/brine at various water/oil mass ratios were investigatedby ε-β fishlike phase diagram.As the oil/water mass ratio α increases, the solubilities of the alcohol wouldincrease, while the solubilization ability (SP*) of the microemulsion systems woulddecrease, and for the system containing Tween60or Tween80, the mass fractions ofthe alcohol in the interfacial layer, AS, would increase, whereas for the system containing Tween20, the mass fractions of the alcohol in the interfacial layer, AS,would decrease.The order of the solubilization ability of the microemulsion systems containingdifferent Tweens is Tween60> Tween80>Tween20.As the carbon chain lengths of the alkane (nc) increase, the solubilities of thealcohol SA, the mass fractions of the alcohol in the interfacial layer ASwould increase,while the solubilization ability of the microemulsion systems, SP*would decrease.The values of SA, ASand SP*in the microemulsion systems containingpropan-1-ol were all larger than the corresponding values in the systems containingbutan-1-ol.Chapter IV. Effect of oil/water mass ratios on the phase behavior andsolubilization of microemulsion systems containing C16mimBr/cosurfactant/alkane/NaCl solutionThe phase behavior of microemulsion systems containing C16mimBr/cosurfactant/alkane/NaCl solution (5%) at different oil/water mass ratios was studiedby an α-ε-β fishlike phase diagram. The composition of the interfacial layer, thesolubilities of the cosurfactant and solubilization ability of the microemulsion systemswere investigated.As the oil/water mass ratio α increases, the solubilities of the cosurfactant wouldincrease, and the mass fractions of the cosurfactant in the interfacial layer, AS, wouldincrease, while the solubilization ability (SP*) of the microemulsion systems woulddecrease.As the carbon chain lengths of the alkane (nc) increase, the solubilities of thealcohol SAand the mass fractions of the cosurfactant in the interfacial layer ASwouldincrease, while the solubilization ability of the microemulsion systems, SP*woulddecrease.The values of SA, ASin the microemulsion systems containing butyric acid wereall larger than the corresponding values in the systems containing butan-1-ol. Whilethe values of SP*in the microemulsion systems containing butyric acid were smaller than the corresponding values in the systems containing butan-1-ol.As temperature increases, SAand SP*decrease, while ASincreases. As salinityincreases, SAand ASdecrease, while SP*increases.Chapter V. Phase behavior and solubilization of ionic liquidsmicroemulsion systems at different oil/water mass ratios.The phase behavior of microemulsion systems containing C12mimBr/butan-1-ol/oil/NaCl solution (5%) at different oil/water mass ratios was studied by anα-ε-β fishlike phase diagram method.As the oil/water mass ratio α increases, the solubility of the cosurfactant (SA), themass fractions of the cosurfactant in the interfacial layer (AS) and the solubilizationability (SP*) of the microemulsion systems containing toluene as oil phase have thesame change order as the microemulsion systems containing xylol as oil phase, andhave the reverse change order as the systems containing tetrachlorethylene.The microemulsion system containing tetrachlorethylene as oil phase has largersolubilization ability.