Interfacial tension is the surface tension at the interface between two liquids. 界面張力是兩種液體之間界面上的表面張力。
Even if it cannot produce ultra low interfacial tension, its last producible oil index may equal that of APS. 再加上二元體系的粘度和彈性比三元體系的高很多,即使界面張力達不到超低值,總采收率也可以達到三元復合驅采收率值。