System for measuring surface properties of viscoelastic adsorption layers on liquids and method for measuring surface properties of viscoelastic adsorption layers on liquids

摘要

The system for measuring surface tension as a function of time in such a deformation of the surface of the test liquid is characterized by the presence of a test fluid in the measuring vessel, immersing the measuring frame (3) made of a hydrophobic material, limiting and separating the measuring surface of the test fluid, while the bottom edge of the frame remains in contact with the liquid,allowing the free flow of fluid beyond the rim edge below the bottom edge to the measuring vessel area by maintaining a constant level of fluid inside the frame during measurement. The frame is formed by a laterally closed variable-shaped collar, the frame in the cross is rectangular and after deformation takes the form of a rhomboidal or the frame in the cross is collistic and after deformation takes the ellipsoidal form. Frame deformation results in the measurement surface deformation of the test fluid as a function of time A(t). The notification shall also cover the way surface tension is measured over time.