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采用AOT为表面活性剂,不同碳链长度正构醇为助表面活性剂,通过稀释法制备了AOT/柴油/正构醇/水微乳体系。考察了醇与表面活性剂的质量比(r)和正构醇的碳链长度对柴油微乳体系的影响,对不同条件下制备的微乳体系的电导率(δ)、界面张力(γ)及运动粘度(μ)进行了表征。结果表明,采用正丁醇时,微乳体系会出现渗滤现象。采用其他醇时,微乳体系的最大增溶水量(W0)随碳链长度增加而减小,随r增大先增大后减小;随增溶水量(W)增加,δ增大直至达到稳定,γ减小,μ增大;随醇碳链长度增大,δ减小,γ、μ增大;随r增大,δ增大,γ、μ减小。采用正戊醇(r=0.4)时,微乳体系的W0最大,γ、μ均较小,柴油微乳液体系的性能较佳。
AOT / diesel / n-propanol / water microemulsion system was prepared by dilution method using AOT as surfactant and n-alkanol with different carbon chain length as cosurfactant. The influences of mass ratio of alcohol to surfactant (r) and carbon chain length of normal alcohol on diesel microemulsion system were investigated. The influences of different conditions on conductivity (δ), interfacial tension (γ) and Kinematic viscosity (μ) was characterized. The results show that the use of n-butanol, microemulsion system will appear percolation phenomenon. When using other alcohols, the maximum solubilized water (W0) of microemulsion system decreases with the increase of carbon chain length, increases first and then decreases with increasing r, and increases with increasing amount of solubilizing water (W) until it reaches With the increase of alcohol carbon chain length, δ decreases and γ and μ increase. As r increases, δ increases, while γ and μ decrease. When n-amyl alcohol (r = 0.4), the W0 of the microemulsion system is the largest, γ and μ are small, diesel microemulsion system performance is better.