Galwick

Pore size distribution and bubble point measurement of the membranes were carried out using a capillary flow porometer (Porous Materials Inc., USA). The membranes were first wetted with Galwick solution and then placed in the holder. Measurements were made in a wet up, dry up operating mode. 

In the extrusion flow porometry, a wetting liquid, such as galwick, is used to fill the hydrophilic and the hydrophobic pores of the sample. The inert gas is used to remove the liquid from pores and permit gas flow. The airflow rate and differential air pressures are measured using dry and wet samples. The differential pressure is related to pore diameter as... 

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