WETTING STRUCTURING METHOD AND MODELS FOR PUMP-FREE TRANSFER AND PRECISE VOLUME CONTROL OF LIQUIDS ON AND THROUGH POROUS MATERIALS Russian patent published in 2021 - IPC B01L3/00 

FIELD: hydrodynamics.

SUBSTANCE: invention relates to methods of liquid transfer through porous materials. The liquid control material comprises a porous substrate having a first and second surface; and a wedge-shaped transfer element located on one of the first and second surfaces, with the wedge-shaped transfer element having a narrow end and a wide end, with the wide end connected to the first tank, and the wedge-shaped transfer element is designed to allow liquid to pass from the narrow end to the wide end into the first tank regardless of gravity, while the first tank is designed to let liquid pass from the substrate in the z-direction opposite to the surface on which the liquid is distributed. The surface on which the wedge-shaped transfer element is located is one of hydrophobic or superhydrophobic ones, and the wedge-shaped transfer element is one of the following: a) superhydrophilic when the first surface is hydrophobic, b) superhydrophilic when the first surface is superhydrophobic, and c) hydrophilic when the first surface is superhydrophobic.

EFFECT: increased efficiency of controlled unidirectional liquid transfer.

20 cl, 1 tbl, 6 dwg