NON-DEWETTING POROUS MEMBRANES

摘要

Microporous membrane composites that are non-dewetting are disclosed. These microporous membrane composites are wet with solutions of methanol and water and are non-dewetting following autoclave treatment in water. The microporous membrane composites comprise a microporous membrane support that is coated with a crosslinked ionomer comprising hydrophilic groups. Compared to the microporous membrane support, the microporous membrane composite has a flow loss on average in isopropyl alcohol of less than 82%.

主权项

1. A microporous membrane composite comprising:
a microporous membrane support comprising a coating on the surfaces and pores of said microporous membrane support, said coating comprises amorphous ionomer with acid hydrophilic groups, the amorphous ionomer having an equivalent weight of between 380 g/eq and 620 g/eq, the microporous membrane composite is non-dewetting after autoclave treatment in water, said microporous membrane composite is wet with methanol and water containing solutions, and said microporous membrane composite has a flow loss of 82% or less compared to the microporous membrane support when measured using 500 milliliters of isopropyl alcohol at a pressure of 97,905 Pa.