Composite nanofiltration membrane
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United States of America Patent
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Nov 30, 1993
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N/A
app pub date -
Apr 30, 1992
filing date -
Apr 30, 1991
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Expired
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Abstract
Mechanically strong and thermally/chemically-resistant composite nanofiltration membranes, well adapted for the separation of low molecular weight compounds, comprise a porous inorganic support substrate, the pore diameters of which ranging from 3 to 10 nm, this inorganic support substrate having a polymer membrane which comprises an elastomeric polyphosphazene densely deposited on at least one of the face surfaces thereof, the structural porosity of such polyphosphazene membrane ranging from 0.2 to 2 nm.
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