Designed for pore structure characterization of materials such as
hollow fibers, flat sheet membranes, filter media, ceramics having very
small pore sizes. It is capable of measuring pore diameters, pore size
distributions and liquid flow rates of materials having very low
permeability.
The Liquid-Liquid Porometer uses two immiscible
& saturated wetting liquids with low interfacial tension. The
selection of low interfacial liquids allow to measure open pores down to
3 nm at relatively low pressures. The pores are filled with a first
liquid and the second liquid is pressurized to displace the first liquid
and flow through the pores. The amount of liquid flowing out is
measured. Then the second liquid flow rate and differential pressure are
measured. The pore distributions are computed similar to a capillary
flow porometer.