METHOD AND SYSTEM FOR MEASURING WETTING ANGLE Russian patent published in 2023 - IPC G01N13/02 G01N23/04 

FIELD: measurements.

SUBSTANCE: material sample having a flat surface is placed in an X-ray transparent cell mounted on an adjustable platform and connected to devices for filling the cell with the first fluid and forming a drop of the second fluid. Next, the platform on which the radiolucent cell is installed is adjusted so that the flat surface of the sample becomes horizontal, a drop of the second fluid is formed on the flat surface of the sample, then the radiolucent cell is filled with the first fluid. For a time sufficient to reach an equilibrium state on the contact surfaces of both fluids and the sample, X-rays are continuously taken of the cell filled with the first fluid with a drop of the second fluid on the surface of the sample, and the images are stored. Next, the cell is shifted so that the entire field of view of the X-ray imaging device is occupied by the first fluid, and the drop of the second fluid and the sample do not fall into the field of view, the cell filled with the first fluid is X-rayed, and the image is saved as a background image. Then, contrasted images are obtained by joint processing of the background image and images of the cell filled with the first fluid with a drop of the second fluid on the sample surface, and for the contrasted images, the wetting angle is calculated according to the shape of the second fluid drop on the sample surface.

EFFECT: providing the possibility of obtaining the time dependence of the contact angle value for a fluid drop lying on the surface of a material sample surrounded by another fluid, regardless of the optical transparency of the fluids under study.

10 cl, 5 dwg