Hydrocarbon fluid-water separation
AssigneeDonaldson Company, Inc.
InventorsBradly G. Hauser, Stephen K. Sontag, Davis B. Moravec, Stuti S. Rajgarhia, Andrew J. Dallas, Vijay K. Kapoor, Aflal Rahmathullah, Charles S. Christ, Joseph M. Block
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Abstract
A substrate for use in a filter media including, for example, in a hydrocarbon fluid-water separation filter; methods of identifying the substrate; methods of making the substrate; methods of using the substrate; and methods of improving the roll off angle of the substrate. In some embodiments, the substrate includes a hydrophilic group-containing polymer or a hydrophilic group-containing polymer coating.
Claims17
A filter media comprising a substrate, wherein the substrate comprises:
- a surface having a roll off angle in a range of 40 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 20 μL water droplet when the surface is immersed in toluene,
- wherein the surface is formed of a polymer disposed thereon, the polymer comprising a hydrophilic group, wherein the polymer forming the surface is selected from a group consisting of poly(hydroxypropyl methacrylate) (PHPM), poly(2-hydroxyethyl methacrylate) (PHEM), poly(2-ethyl-2-oxazoline) (P2E2O), polyethyleneimine (PEI), quaternized polyethyleneimine, poly(dopamine), or a combination thereof.
A filter media comprising a substrate,
- wherein the substrate comprises a surface having a roll off angle in a range of 40 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface is immersed in toluene, and
- wherein the surface comprises an electrospun nanofiber coating comprising a polymer with hydrophilic groups, wherein electrospinning of the polymer forms polymer nanofibers.
Dependencies are inferred from the claim text.