聚合物对孤岛沥青质模拟油/水界面性质的影响

用挂片法和双锥摆法测定了聚合物溶液/沥青质模拟油体系的界面张力和界面剪切粘度,并对聚合物浓度对其的影响进行了分析。结果表明,聚合物使沥青质模拟油/模拟水体系的界面张力增加,聚合物的存在会影响沥青质在界面处的吸附速度和吸附量,导致沥青质界面膜强度降低。聚合物浓度较低时,聚合物溶液/沥青质模拟油体系的界面剪切粘度低于模拟水/沥青质模拟油体系的界面剪切粘度,聚合物浓度较高时则相反。

Effect of polymer on interfacial properties of Gudao asphaltene model oil/water

The interracial tension and interracial shear viscosity of polymer solution/asphahene model oil were measured respectively by Wilhelmy method and biconical bob method. The influence of polymer concentration on the interracial shear viscosity was studied. The results show that the interracial tension of polymer solution/asphahene model oil increases because of the existence of polymer. But the adsorption of asphahene at interface is affected because of the existence of polymer, which results in the intension declining of asphahene interfacial structure. When the polymer concentration is lower, the interfacial shear viscosity of polymer solution/asphahene model oil is less than that of stimulation water/asphahene model oil. When the polymer concentration is higher, the interfacial shear viscosity of polymer solution/asphahene model oil is more than that of stimulation water/asphahene model oil.