Skinned hollow fiber membrane and method of manufacture
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United States of America Patent
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Jul 26, 2005
Grant Date -
N/A
app pub date -
Jan 27, 2000
filing date -
Jan 29, 1999
priority date (Note) -
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Abstract
Hollow fiber membranes having a skinned surface on one diameter, and a porous surface on the opposite diameter arm produced from perfluorinated thermoplastic polymers by extruding a heated solution of the polymer having a lower critical solution temperature directly into a cooling bath to form the porous membrane by liquid-liquid phase separation. Extrusion can be conducted either vertically or horizontally. The hollow fiber membranes are useful as ultrafiltration membranes and as membrane contactors.
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