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研究了用超临界萃取分馏法(SFEF)从伊朗重质原油中分离的两个具有不同平均分子量的原油界面活性组分在正癸烷/水界面的扩张粘弹性行为以及温度对体系扩张粘弹性的影响.研究发现平均分子量大的样品能在油水界面形成更为牢固的界面膜.从扩张模量幅度对扩张频率的双对数曲线和扩张模量相角的频率依赖关系可以推断所有实验体系界面膜的主要的弛豫过程不是扩散弛豫,而可能主要是通过吸脱附势垒的弛豫过程.温度对两个样品的扩张粘弹性参数都有强烈的影响.升高温度可以降低膜的强度和粘度,并且改变相角的频率响应.
The viscoelastic behavior of two crude oil interfacial active components with different average molecular weights, separated from Iranian heavy crude oil by supercritical fluid fractionation (SFEF), at n-decane / water interface and the effect of temperature on viscoelasticity .The results show that the sample with large average molecular weight can form a stronger interfacial film at oil-water interface.From the exponential relationship between the double logarithmic curve of dilational modulus and the phase angle of dilational modulus, we can deduce that all the experimental systems The main relaxation process of the interfacial film is not diffusion relaxation, but mainly through the relaxation process of the adsorption-desorption barrier. The temperature has a strong influence on the dilatational viscoelasticity parameters of both samples. Strength and viscosity, and change the frequency response of the phase angle.