Phase Composition And Additives On The Properties Of Microemulsion Phase Behavior And Solubilization Effect

This thesis contains four chapters. Chapter I. Introduction; Chapter II. Phase behaviorand solubilization ability of sodium dodecyl sulfate/alcohol/mixed oils/brinemicroemulsion systems; Chapter III. Effects of the composition of mixed oilscontaining methylbeneze on the phase behavior and solubilization ability ofmicroemulsion systems; Chapter IV. Solubilization ability of the microemulsionsystems containing dichloromethane.Chapter I. IntroductionThe basic knowledge about microemulsion and the phase behavior of microemulsionsystems were introduced. The effect of the composition of mixed oils on the phasebehavior and solubilization ability of microemulsion systems were discussed andreviewed.Chapter II. Phase behavior and solubilization ability of sodiumdodecyl sulfate/ alcohol/ mixed oils/ brine microemulsion systemsThe phase behavior and solubilization ability of the microemulsion systemscontaining mixed oils: sodium lauryl sulfate （SDS） / butan-1-ol / mixed oils （hexane /decane, hexane / cyclohexane, hexane / methylbenzene, methylbenzene / decane,methylbenzene / cyclohexane and methylbenzene /tetrachloroethene） / NaCl aqueoussolution were studied using theεβfishlike phase diagram method. The synergism inthe solubilization ability was observed in the microemulsion systems containing oilmixtures of methylbenzene / hexane, methylbenzene / cyclohexane, andmethylbenzene / tetrachloroethene, respectively. The solubility of the alcohol in theoil and aqueous phases and the composition of the interfacial layer in themicroemulsion systems containing oil mixtures were also investigated.Chapter III. Effects of the composition of mixed oils containing methylbeneze on the phase behavior and solubilization ability ofmicroemulsion systems.For the microemulsion systems C_8/10APG / butan-1-ol / mixed oils（methylbenzene/hexane, methylbenzene/cyclohexane, and methylbenzene/tetrachloroethene） / NaCl solution:1. With increasing Xmethylbenzene, the average solubility S_Bof butan-1-ol in themicroemulsion systems decreases when methylbenzene / decane are used as oil phase,but changes slowly when methylbenzene / cyclohexane or methylbenzene /tetrachloroethene are mixed in different mass ratios. The mass fraction of alcohol inthe interfacial layer, A^Sshows a similar trend of change as compared to S_Bvalueswhen X_{methylbenzene}increases.2. Synergism on the solubilization ability （SP^*） of the microemulsion systems existsbetween oil mixtures （methylbenzene / hexane, methylbenzene / cyclohexane, andmethylbenzene / tetrachloroethene）.3. The effect of temperature on the solubilization ability of microemulsion systemscontaining mixed oils is small.Chapter IV. Solubilization ability of the microemulsion systemscontaining dichloromethane.1. As Xdichloromethaneincreases, the average solubility of butan-1-ol S_Band the massfraction of alcohol in the interfacial layer A^Ssignificantly decreases for themicroemulsion systems alkyl polyglucoside / butan-1-ol /mixed oils containingdichloromethane /brine.2. Synergism in the solubilization ability of microemulsion systems exists when theoil mixtures （dichloromethane/hexane, dichloromethane/cyclohexane anddichloromethane / tetrachloroethene） are used in above microemulsion systems.3. The synergism effect of the microemulsion systems with oil mixtures containingdichloromethane is larger than that of the microemulsion systems with oil mixturescontaining methylbenzene.