Microporous peek membranes and the preparation thereof
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United States of America Patent
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Feb 12, 1991
Grant Date -
N/A
app pub date -
Oct 11, 1988
filing date -
Oct 11, 1988
priority date (Note) -
Expired
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Abstract
A microporous polyetheretherketone (PEEK) membrane in the form of films and hollow fibers formed without sulfonating the PEEK polymer. Solid fibers and articles are also claimed. A method of making membranes, fibers and articles from solutions of PEEK in non-sulfonating acid solvents in claimed. Solvents include methane sulfonic acid and trifluoromethane sulfonic acid. Sulfuric acid may be used as a diluent in non-sulfonating amounts. PEEK membranes are used as supports for composite ultrafiltration and reverse osmosis membranes. A method of making membranes, fibers, and articles is also described.
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