Cross Linking Treatment of Polymer Membranes
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United States of America Patent
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Issued Date -
Sep 4, 2008
app pub date -
Jun 20, 2006
filing date -
Jun 20, 2005
priority date (Note) -
Abandoned
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Abstract
Methods of forming a hydrophilic porous polymeric membrane which include preparing a porous polymeric membrane from a polymer blend which typically contains a hydrophobic non crosslinkable component (e.g. PVdF) and a component which is cross-linkable (for instance, PVP) and treating said porous polymeric membrane under cross linking conditions to produce a modified membrane with greatly improved water permeability and hydrophilic stability. Cross linking condition include chemical (e.g. peroxodisulfate species), thermal or radiation and/or combinations thereof. Non cross linked material may be washed out if desired.
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