Surface modification of polyamide reverse osmosis membranes
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United States of America Patent
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Aug 13, 2013
Grant Date -
Feb 2, 2012
app pub date -
Apr 8, 2010
filing date -
Apr 8, 2009
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Abstract
The present invention relates to surface modification of reverse osmosis membranes to introduce antifouling properties without compromising the separation properties of the original membranes. This approach utilizes: providing a coated membrane surface having enhanced hydrophilic characteristics that prevents the biofoulants from settling; have a surface that consists of hydrophilic brushes that unsettle any biofoulants that get through; and having antimicrobial ions present in the membrane coatings and able to remove or minimize any remaining biofoulants without leaching into the permeate. These coatings are made using dendritic polymers such as hyperbranched polymers or dendrimers.
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