Porous composite membrane and method for making the same
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United States of America Patent
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Dec 8, 2009
Grant Date -
Dec 2, 2004
app pub date -
Aug 22, 2003
filing date -
Sep 3, 2002
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Abstract
The invention provides composite porous membranes comprising a porous hydrophobic substrate coated with difunctional surface-modifying molecules. The difunctional surface-modifying molecules provide a hydrophilic surface without forming branches of interconnected polymer molecules in the pores. The invention also provides a method for making composite porous membranes, such as a composite hydrophilic membrane with reduced concentration of surface modifying molecules required to coat a hydrophobic substrate.
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