Fouling resistant coating for membrane surfaces
OwnerQun Song, Jane Chiao Liinventors
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Abstract
A coating that exhibits resistance to fouling by waterborne contaminants, and permselective membranes having this type of coating, are disclosed. For example, a reverse osmosis membrane is coated with a hydrogel-like composition comprising a combination of a hydrophilic polymer, a polyphenolic compound, and a surfactant, whereby the membrane is made more resistant to fouling by organic contaminants. Particularly beneficial are coating compositions containing amine-based surfactants, these being retained in the hydrophilic coating by polar or ionic binding forces.
Claims20
A coating for conferring fouling resistance to a permselective membrane, comprising a hydrophilic polymer matrix and a surface-active agent associated therewith, said coating being applied to and insolubilized upon an active surface of the permselective membrane.
A permselective membrane having improved resistance to fouling, comprising a permselective membrane having a coating on an active surface thereof, the coating comprising a hydrophilic polymer matrix and a surface-active agent associated therewith, said coating being applied to and insolubilized upon an active surface of the permselective membrane.
A permselective membrane having improved resistance to fouling, comprising a permselective membrane having a coating on an active surface thereof, the coating comprising a hydrophilic polymer matrix and a polyfunctional phenolic compound.
Dependencies are inferred from the claim text.