METHOD TO DEFINE AMOUNT OF LIQUID MOVED BY SURFACTANT IN GAS PHASE Russian patent published in 2014 - IPC G01N13/00 B82B3/00 

FIELD: measurement equipment.

SUBSTANCE: to establish amount of liquid moved by a surfactant in a gas phase, speed of its movement, for production of new characteristics in assessment of properties of various substances, including powdery nanoparticles and nanomaterials, for liquid movement they use surfactants, which may change into a gas phase under room temperatures, at the same time the surfactant is used to act at the layer of the liquid available on the surface of the investigated material from gas phase. For this purpose the investigated material in the form of a plate or in the form of a powder is placed into the centre of limiting circumference applied onto easily replaceable surface or into a cuvette with available internal area, and the investigated material is coated with the liquid layer of available thickness. Then the capillary is filled by soaking into a surfactant, for instance, isopropyl alcohol, maintained for 5-10 min in gas medium, where the experiment is carried out. For evaporation of the surfactant from the outer surface of the capillary they switch on a video or a movie camera, and the filled capillary is installed at height of 1-6 mm above the centre of the surface of the investigated material. The changes taking place are recorded until the process of liquid movement is over. The taken video material is placed into a computer, and using standard software, they determine time required for liquid layer breakthrough in time between taken frames, speed of liquid layer movement along the completed distance by the edge of the moved layer of the liquid and time spent for movement, which is determined by difference between frames taken and the speed of filming, and also the volume of moved liquid in time by change of radius of the moved layer and the initial thickness of the liquid layer.

EFFECT: establishment of liquid amount moved by a surfactant in gas phase, and speed of its movement, in production of new characteristics for assessment of properties of various substances, including powdery nanoparticles and nanomaterials.

13 dwg, 1 tbl