Filter membrane and method of manufacture
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United States of America Patent
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Aug 24, 1993
Grant Date -
N/A
app pub date -
Jul 24, 1992
filing date -
Jul 25, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A membrane for a filter device or a device for gas or liquid separation, the membrane being constituted by a porous structure made of at least one material selected from sintered ceramic, sintered metals, microporous carbon, microporous glass, and polymers, said structure including at least one microporous layer, wherein the entire outside surface and inside surface of the pores of said structure is covered by a thin and continuous film of a polyphosphazene, the thickness of said film lying in the range 0.01% to 10% of the mean diameter of the pores of said microporous layer.
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