Effects Of Short-chain Alcohols On Phase Behavior Of CTAB Microemulsion Systems And Materials Synthesis

Microemulsion is a kind of system which droplet size is smaller than emulsion and larger than solution,it is a homogeneous,transparent,isotropic and thermodynamically stable dispersion system.The main components of microemulsion are surfactant,cosurfactant,oil and water.Because of its special structure and properties,it has been applied in many fields.In this thesis,the phase behavior of microemulsion was studied,and the morphology of controllable nanomaterials were synthesized through the microemulsion routes.The specific contents are as follows:Chapter I is the introduction of microemulsions,mainly including the properties,the formation mechanism,the influence factors and the preparation methods of microemulsions.Secondly,it is the introduction of the purpose and significance of this thesis.In Chapter II,the phase behavior of the microemulsion system formed by cationic surfactant hexadecyl-trimethyl-ammonium bromide(CTAB)with n-butanol,isooctane and water at different temperatures was studied,and the influence of temperature on the formation of microemulsion was discussed.According to the results,the phase behavior of the microemulsion system at 40 ℃ was studied further.The area of the single phase microemulsion was divided though electroconductivity.Ca CO3 and Zn S nanoparticles were synthesized using W/O microemulsion as template.At the same time,the synthesis results were discussed at different water content and salt concentration,finally,the synthesized materials were characterized by scanning electron microscopy(SEM)and X ray powder diffraction(XRD),respectively.In Chapter III and IV,the cosurfactant in microemulsion was used with n-pentanol and n-hexanol instead of n-butanol,the phase behavior of the CTAB/n-pentanol(n-hexanol)/isooctane/water microemulsion systems at different temperatures were discussed,at the same time,the phase diagrams of the microemulsion system at40 ℃ was studied further.In comparison with n-butanol,CaCO3 and Zn S nanoparticles were synthesized by using W/O microemulsion as template.The Chapter V is the summary of the thesis and the prospect of the research on microemulsion systems with different short-chain alcohols.