Patent ID: 9080934
Filing Date: 2015-07-14
Classification: G01N

Abstract:
1. A method for determining wettability of porous materials comprising: placing a sample of a porous material into a calorimeter cell, contacting the sample with a wetting fluid and continuously measuring a heat flow into the cell, calculating a first contact wetting angle of pores partially filled with the wetting fluid due to spontaneous impregnation of a porous space of the sample at a constant pressure based on results of the heat flow measurement and taking into account a thermal effect of wetting fluid compression, at least once, increasing a pressure in the cell with the sample starting from an initial value to a value at which all pores of the sample are filled with the wetting fluid and continuously measuring a heat flow into the cell, calculating a second contact wetting angle of the pores filled with the fluid under pressure based on results of the heat flow measurement and taking into account a thermal effect of the wetting fluid compression, reducing the pressure in the cell with the sample to the initial value and continuously measuring a heat flow into the cell, and calculating a third contact wetting angle for pores free from the wetting fluid based on results of the heat flow measurement and taking into account a thermal effect of the wetting fluid compression.