The Phase Behavior And Solubilizing Ability Of Isopropyl Myristate As A Microemulsion Of The Oil Phase

The thesis consists of four parts.The first part is the introduction.The second part is the interfacial film composition and solubilization ability of microemulsions containing CTAB-SDS/IPM.The third part is the solubilities of the cosurfactants in water and oil phases,respectively,of microemulsions by optimum microemulsion dilution method.The fourth part is the construction and phase behavior of green microemulsion systems.? IntroductionThe definition,structures,properties and their influencing factors of microemulsions were introduced.The phase diagrams of microemulsions were summarized.The progress of the microemulsions containing IPM as an oil phase were reviewed.? The interfacial film composition and solubilization ability of microemulsions containing CTAB-SDS/IPMThe effects of oil/water ratios,salinities and oils on the phase behavior and solubilization ability of CTAB-SDS/IPM microemulsions were studied.1.The middle phase microemulsions form when the X_SDS values were at the ranges of0-0.2 and 0.8-1.0,while the precipitate appears at the X_SDSrange of 0.3-0.7.2.The mixed CTAB-SDS microemulsion systems(X_SDS =0.1,0.2,0.8,0.9)have lower A^S and A^S values,but higher SP* values compared to the microemulsion systems containing single surfactant SDS(X_SDS =1.0)and CTAB(X_SDS =0.0).3.As oil-to-water ratios???increase,A^S would decrease,but A^S values do not change as much.As ? values increase,the SP* values would decrease for the SDS-based microemulsions,would increase for the CTAB-based microemulsions,and would increase at first,and remain constant thereafter for the CTAB-SDS-based microemulsions.4.In the microemulsion systems containing different oils,A^S values have the following order of magnitude: IPM > dodecane > octane.This can be explained as IPM,as a polar oil,has strong interaction with butan-1-ol.The A^S values have the following order of magnitude:v dodecane > IPM > octane.The SP* values of the order of change is the opposite: octane >IPM > dodecane.5.With increasing salinities?w?in the aqueous phase of the microemulsions,the A^S and A^S values would decrease,but SP* values would increase.This was caused by the salting out effect.? The solubilities of the cosurfactants in water and oil phases,respectively,of microemulsions by optimum microemulsion dilution method.The effects of oil/water ratios,salinities and oils on the values of A^W,A^O and A^S of CTAB-SDS/IPM microemulsions were investigated.1.The solubility of butan-1-ol in oil phase was greater than that in aqueous phase.However,the solubility of alcohol in the aqueous phase could not be ignored.2.Compared to the single surfactant SDS or CTAB microenulsions,the A^W,A^O and A^S values in the CTAB-SDS microemulsions were significantly reduced,owing to the synergistic effect of the anionic and cationic surfactants.3.For the microemulsions with different oil/water ratios,the values of A^W and A^S increase,while the values of A^O decrease with increasing oil/water ratios.4.For the microemulsions with different oils,the values of A^W were dodecane > IPM >octane,while A^O were IPM > dodecane > octane.A^S values were: dodecane > IPM> octane.5.With increasing in salinities,the solubility of butan-1-ol in aqueous phase or oil phase decreases.A^S values also decrease,which was ascribed to the salting out effect.? The construction and phase behavior of green microemulsion systemsThe effects of alcohols,oils and salinities on the phase behavior and solubilization of APG/IPM microemulsions were studied.1.The solubilization abilities of the microemulsions with different alcohols were in the order 1,2 octanediol > butan-1-ol > mixed alcohol(V_1-octen-3-ol/V_ethanol= 6: 1).2.The optimum solubilization ability of the microemulsions of APG/butan-1-ol/IPM/brine increases with increasing salinies.3.For the microemulsions with different oils in APG/n-butan-1-ol/oil/water systems,the values of A^W,A^S were: dodecane > IPM > octane,while A^O values were : IPM > dodecane >octane.The solubilization capacity of the oil phase was: octane > IPM > dodecane.4.The solubilization capacity of different nonionic surfactants was: Brij35 > Tween80 >APG.5.The solubility of alcohol in oil phase is greater than that in aqueous phase,and the solubility of alcohol in water phase could not be ignored.